hoshitomo

[hoshitomo]

L'Ammasso Globulare di Ercole (M13) nella costellazione di Ercole è un ammasso globulare, visibile ad occhio nudo in zone senza inquinamento luminoso. Scoperto da Edmond Halley nel 1714, fu inserito da Charles Messier nel suo catalogo nel 1764. E' un ammasso molto ricco composto da centinaia di migliaia di stelle (tra le 300.000 e il milione) a circa 25.000 anni luce dalla Terra. Nel 1974 è stato spedito dall'osservatorio di Arecibo (ora defunto) in direzione dell'Ammasso di Ercole un messaggio radio contenente informazioni riguardanti ad esempio l'uomo, il suo DNA e i numeri atomici degli elementi come rudimentale esperimento di ricerca di vita extraterrestre. Nella foto è visibile una galassia, IC4617, di dimensioni comparabili alla Via Lattea e distante oltre mezzo miliardo di anni luce. La sapreste individuare? ヘルクレス座にあるヘルクレス球状星団（M13）は、光害のない場所では肉眼で見える球状星団です。1714年にエドモンド・ハレーによって発見され、1764年にはシャルル・メシエによってカタログに掲載されました。 地球から約2万5000光年離れたこの星団は、数十万個（30万個から100万個）の星々からなる非常に豊かな星団です。 1974年、アレシボ天文台（現在は廃止）からヘルクレス星団に向けて無線メッセージが送信されました。このメッセージには、例えば人類、そのDNA、元素の原子番号に関する情報が含まれていました。これは地球外生���体探索の初歩的な実験でした。 この写真には、天の川銀河とほぼ同じ大きさで、5億光年以上離れた銀河IC4617が写っています。見つけられますか？

The Hercules Globular Cluster (M13) in the constellation of Hercules is a globular cluster, visible to the naked eye in areas without light pollution. Discovered by Edmond Halley in 1714, it was included by Charles Messier in his catalog in 1764. It is a very rich cluster composed of hundreds of thousands of stars (between 300,000 and a million) about 25,000 light years from Earth. In 1974, a radio message was sent from the Arecibo Observatory (now defunct) towards the Hercules Cluster containing information regarding, for example, man, his DNA and the atomic numbers of the elements as a rudimentary experiment in the search for extraterrestrial life. In the photo you can see a galaxy, IC4617, comparable in size to the Milky Way and over half a billion light years away. Can you spot it?

Scope: Celestron Nexstar 6SE on Celestron AVX mount Lens: Celestron 0.63 focal reducer Aperture: 150 mm, focal length: 1069 mm, f/7.1 Camera: ZWO ASI294MC Pro Guidescope: SVBony SV106, aperture 60mm, focal length: 240mm, f/4 Guide camera: ZWO ASI120mm mini Total integration time: 7h1m Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 7/8

HiRes: https://photos.app.goo.gl/Ef6dCjNArtRzZuo79

[hoshitomo]

Un'altro oggetto iconico del cielo di primavera, la Galassia Vortice nella costellazione dei Cani da Caccia.

La stagione delle piogge si sta avvicinando, il cielo è spesso nuvoloso e anche in caso di cielo sereno l'aria è molto umida e a volte c'è vento. Le peggiori condizioni per scattare foto alle galassie, che sono oggetti per lo più visualmente piccoli e che richiedono pertanto una lunghezza focale lunga. Per questi motivi limito ogni singolo scatto a soli 60 secondi, proprio per minimizzare il rischio di foto mosse. Inoltre dal mio cielo Bortle 7/8 non è facile, a causa dell'inquinamento luminoso, avere un buon contrasto per questi oggetti molto deboli.

La Galassia Vortice (M51, NGC5194) è uno di questi oggetti deboli. Ha una magnitudine di 9,55, dista circa 32 milioni di anni luce e ha un diametro di 76.900 anni luce. Scoperta da Charles Messier nel 1773, nel 1845 William Parsons ne individuò la forma a spirale, ma solo moltissimi anni dopo Edwin Hubble capì che si trattava effettivamente di una galassia. Ciò che contraddistingue questa galassia è la presenza di una piccola galassia vicina (M51b, NGC5195), con la quale interagisce scambiando materia. Le due galassie non sono le uniche visibili nella foto. Sono visibili altre cinque galassie lontanissime: IC4263 a circa 143 milioni di anni luce di distanza, IC 4282 a circa 210 milioni di anni luce, IC 4278 a circa 80 milioni di anni luce e IC 4277 e la cui distanza non è stata ancora calcolata. L'oggetto nel cerchio rosso è la galassia 2MASS 13294021+4720146 che dista 2 miliardi e 300 milioni di anni luce.

春の空のもう一つの象徴的な天体は、いぬ座の渦巻銀河です。

梅雨が近づいており、空は曇りが多く、晴れていても空気は非常に湿気が多く、風が吹くこともあります。銀河の写真を撮るには最悪の条件です。銀河はほとんどが視覚的に小さい物体なので、長い焦点距離が必要になります。これらの理由から、写真がぼやけるリスクを最小限に抑えるために、各ショットを 60 秒だけに制限しています。また、私の Bortle 7/8 の空では、光害のため、これらの非常に暗い物体に良好なコントラストを得るのは簡単ではありません。

渦巻銀河 (M51、NGC5194) は、こうした暗い天体の 1 つです。等級は9.55で、地球から約3200万光年離れており、直径は76,900光年です。 1773年にシャルル・メシエによって発見され、1845年にウィリアム・パーソンズがその渦巻き形状を特定しましたが、何年も経ってからエドウィン・ハッブルがそれが実際には銀河であることを理解しました。この銀河の特徴は、近傍の小さな銀河 (M51b、NGC5195) の存在であり、この銀河と物質交換によって相互作用しています。 写真に写っているのは2つの銀河だけではありません。他にも5つの非常に遠い銀河が見えます。約1億4300万光年離れたIC4263、約2億1000万光年離れたIC4282、約8000万光年離れたIC4278、そして距離がまだ計算されていないIC4277です。赤い円で囲まれた物体は、23億光年離れた銀河 2MASS 13294021+4720146 です。

Another iconic object of the spring sky, the Whirlpool Galaxy in the constellation Canes Venatici.

The rainy season is approaching, the sky is often cloudy and even in clear skies the air is very humid and sometimes there is wind. The worst conditions for taking pictures of galaxies, which are mostly visually small objects and therefore require a long focal length. For these reasons I limit each single shot to only 60 seconds, precisely to minimize the risk of blurry photos. Furthermore, from my Bortle 7/8 sky it is not easy, due to light pollution, to have a good contrast for these very faint objects.

The Whirlpool Galaxy (M51, NGC5194) is one of these faint objects. It has a magnitude of 9.55, is about 32 million light years away and has a diameter of 76,900 light years. Discovered by Charles Messier in 1773, in 1845 William Parsons identified its spiral shape, but only many years later Edwin Hubble understood that it was actually a galaxy. What distinguishes this galaxy is the presence of a small nearby galaxy (M51b, NGC5195), with which it interacts by exchanging matter. The two galaxies are not the only ones visible in the photo. Five other very distant galaxies are visible: IC4263 at about 143 million light years away, IC 4282 at about 210 million light years, IC 4278 at about 80 million light years and IC 4277 whose distance has not yet been calculated. The object in the red circle is the galaxy 2MASS 13294021+4720146 which is 2 billion and 300 million light years away.

Scope: Celestron Nexstar 6SE on Celestron AVX mount Lens: Celestron 0.63 focal reducer Aperture: 150 mm, focal length: 1069 mm, f/7.1 Camera: ZWO ASI294MC Pro Guidescope: SVBony SV106, aperture 60mm, focal length: 240mm, f/4 Guide camera: ZWO ASI120mm mini Exposure: 228 frames @ 60s @ -15°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 600 frames @ 60s @ -10°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) Total integration time: 13h48m Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 7/8 https://photos.app.goo.gl/3ZyHM79p2Vm6tFsVA

[hoshitomo]

Le galassie più luminose del gruppo M81, un gruppo di galassie a circa 12 milioni di anni luce. Al centro, a destra M81, la galassia di Bode, a sinistra NGC 3077 e in alto M82, la galassia sigaro. Ho scattato questa foto la scorsa settimana durante una breve vacanza in montagna nell'altopiano di Marunuma con il piccolissimo ZWO Seestar S30 in una notte fredda (3°C) e umida (90%) a 1300 metri di altezza.

約1200万光年離れた銀河団であるM81グループの中で最も明るい銀河。中央、右側に M81 ボーデ銀河、左側に NGC 3077、その上に M82 葉巻銀河があります。 この写真は先週、丸沼高原で短い山行休暇中に、標高1300メートルの寒く（3℃）、湿度の高い（90％）夜に小型のZWO Seestar S30で撮影しました。

The brightest galaxies in the M81 group, a galaxy group about 12 million light years away. In the center, on the right M81, the Bode galaxy, on the left NGC 3077 and at the top M82, the Cigar Galaxy. I took this photo last week during a short mountain holiday at the Marunuma highlands with the very small ZWO Seestar S30 on a cold (3°C) and humid (90%) night at 1300 meters above sea level.

Scope: Seestar S30 in equatorial mode Aperture: 30 mm, focal length: 150 mm, f/5 Camera: ZWO ASI662 (embedded in Seestar S30) Exposure: 283 frames @ 30s (ZWO UV/IR cut filter, calibration frames performed automatically) Total integration time: 2h21m30s (Broadband) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 3

https://photos.app.goo.gl/iJrTFPtkAS1LaQgV7

[hoshitomo]

La Galassia di Bode (M81) è una galassia nella costellazione dell'Orsa Maggiore, relativamente vicina alla Terra, a circa 12 milioni di anni luce. Ha un diametro di 96.000 anni luce e ospita oltre 250 miliardi di stelle. Scoperta da Johann Elert Bode alla fine del 1774 con gli strumenti dell'epoca, ne ha preso il nome e successivamente è stata inserita da Charles Messier nell'omonimo catalogo. È il classico esempio di galassia a spirale, forma che possiamo facilmente vedere grazie alla inclinazione rispetto a noi. I bracci contengono molte regioni starbust, luoghi in cui si stanno formando grandi quantità di nuove stelle. La Galassia di Bode è la galassia più grande del cosidetto gruppo M81, un vicino del gruppo locale della Via Lattea, del quale fanno parte anche la galassia Sigaro (M82) e NGC3077.

La ripresa di questa galassia, così come per M82, è per me di difficile realizzazione perché quasi sempre ostruita dal tetto di casa e nelle migliori condizioni è visibile per circa 3 ore e mezza.

ボーデ銀河（M81）は、おおぐま座にある銀河で、地球から比較的近く、約1200万光年離れています。直径は96,000光年あり、2,500億以上の星が存在します。 1774年末にヨハン・エラート・ボーデが当時の機器で発見し、その名前が付けられ、その後シャルル・メシエによって同名のカタログに掲載されました。 これは渦巻銀河の典型的な例であり、私たちに対する傾斜のおかげでその形が簡単に見ることができます。腕には、大量の新しい星が形成される場所であるスターバースト領域が多数存在します。 ボーデ銀河は、天の川銀河の局部銀河群の隣に位置する、いわゆる M81 グループの中で最大の銀河です。このグループには、葉巻銀河 (M82) や NGC3077 も含まれています。

この銀河は、M82 と同様に、家の屋根に遮られることがほとんどで、最良の条件でも約 3 時間半しか見えないため、画像を取得するのが困難です。

Bode's Galaxy (M81) is a galaxy in the constellation Ursa Major, relatively close to Earth, about 12 million light-years away. It has a diameter of 96,000 light-years and hosts over 250 billion stars. Discovered by Johann Elert Bode at the end of 1774 with the instruments of the time, it took its name and was subsequently included by Charles Messier in the homonymous catalog. It is the classic example of a spiral galaxy, a shape that we can easily see thanks to the inclination with respect to us. The arms contain many starburst regions, places where large quantities of new stars are forming. Bode's Galaxy is the largest galaxy of the so-called M81 group, a neighbor of the Local Group of the Milky Way, which also includes the Cigar Galaxy (M82) and NGC3077.

The image of this galaxy, as for M82, is difficult for me to achieve because it is almost always obstructed by the roof of the house and in the best conditions it is visible for about 3 and a half hours.

Scope: Celestron Nexstar 6SE on Celestron AVX mount Lens: Celestron 0.63 focal reducer Aperture: 150 mm, focal length: 1069 mm, f/7.1 Camera: ZWO ASI294MC Pro Guidescope: SVBony SV106, aperture 60mm, focal length: 240mm, f/4 Guide camera: ZWO ASI120mm mini Exposure: 85 frames @ 180s @ -20°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 543 frames @ 60s @ -15°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 116 frames @ 60s @ -10°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 284 frames @ 60s @ -10°C, gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Total integration time: 15h14m (Broadband), 4h44m (Narrowband) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 7/8

Hi-Res: https://photos.app.goo.gl/DqfZKe2eFyPUc6uR9

[hoshitomo]

La Nebulosa California (NGC 1499) è una nebulosa ad emissione di grandi dimensioni nella costellazione del Perseo ed ha una lunghezza apparente di circa cinque diametri lunari. La sua distanza è di 1000 anni-luce e la reale lunghezza è di circa 100 anni-luce. Il colore rosso è dovuto ad idrogeno ionizzato dalla radiazione proveniente dalla stella Menkib (Xi Persei), la grande stella nella parte inferiore della foto, una stella molto giovane, di 7 milioni di anni, ma gigantesca e pertanto molto potente. L'acquisizione è stata eseguita in tre sessione tra la fine di dicembre e l'inizio di gennaio.

カリフォルニア星雲 (NGC 1499) はペルセウス座にある大きな輝線星雲で、見かけの長さは��の直径の約 5 倍です。その距離は1000光年、実際の長さは約100光年です。赤い色は、写真の下部にある大きな星、メンキブ（ペルセウス座Xi）からの放射線でイオン化された水素です。メンキブは年齢が700万歳と非常に若い星ですが、巨大なので非常に強力です。 キャプチャーは12月末から1月初めにかけて3回に分けて行われた。

The California Nebula (NGC 1499) is a large emission nebula in the constellation Perseus and has an apparent length of about five lunar diameters. Its distance is 1000 light-years and its real length is about 100 light-years. The red color is due to hydrogen ionized by radiation from the star Menkib (Xi Persei), the large star in the lower part of the photo, a very young star, 7 million years old, but gigantic and therefore very powerful. The capture was performed in three sessions between the end of December and the beginning of January.

Scope: Svbony SV503 80 ED on Celestron AVX mount Camera: ZWO ASI294MC Pro Lens: Svbony 0.8 Focal Reducer / Field Flattener Aperture: 80 mm, focal length (FL): 448 mm, f/5.6 Guidescope: Svbony SV106 Guidescope camera: ZWO ASI120MM 260 frames @ 180s @ -10°C, gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 7

Hi-Res: https://photos.app.goo.gl/QNcYJAt3MMuVtFg58

[hoshitomo]

E' sempre un'emozione riprendere questo oggetto, e durante la processazione dell'immagine, estrarre i dettagli e metterli in evidenza. L'oggetto a forma di testa di cavallo che si staglia sulla nebulosa ad emissione di color rosso (IC434) è Barnard 33, una nebulosa oscura chiamata appunto Nebulosa Testa di Cavallo, ed è uno degli oggetti più famosi ed iconici del cielo. In basso a sinistra la nebulosa a riflessione NGC2023. Questa foto è nata come primo test del setup costituito dalla montatura equatoriale e dal telescopio da 6 pollici Schmidt-Cassegrain. Volevo verificare la precisione dell'inseguimento ed essendo riuscito a riprendere singoli frame da 3 minuti, posso dire di essere piuttosto soddisfatto.

このオブジェクトを撮影し、画像処理中に詳細を抽出して強調表示するのは常にスリル満点です。赤色輝線星雲 (IC434) の上にそびえ立つ馬頭型の天体は、バーナード 33 です。これは「馬頭星雲」として知られる暗黒星雲で、天空で最も有名で象徴的な天体の 1 つです。左下には反射星雲NGC2023があります。 この写真は、赤道儀と 6 インチ シュミット カセグレン望遠鏡で構成されるセットアップの最初のテストとして撮影されました。トラッキングの精度を確認したかったのですが、3分間のフレームを1枚キャプチャすることができ、非常に満足しています。

It is always a thrill to shoot this object, and during the image processing, extract the details and highlight them. The horsehead-shaped object that stands out on the red emission nebula (IC434) is Barnard 33, the dark nebula "Horsehead Nebula", and is one of the most famous and iconic objects in the sky. At the bottom left is the reflection nebula NGC2023. This photo was born as a first test of the setup consisting of the equatorial mount and the 6-inch Schmidt-Cassegrain telescope. I wanted to verify the precision of the tracking and having managed to shoot single 3-minute frames, I can say that I am quite satisfied.

Scope: Celestron Nexstar 6SE on Celestron AVX mount Lens: Celestron 0.63 focal reducer Camera: ZWO ASI294MC Pro Aperture: 150 mm, focal length: 1069 mm, f7.1 Exposure: 90 frames @ 180s @ -20°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 100 frames @ 60s @ -20°C, gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 7

Hi-Res: https://photos.app.goo.gl/qPDEtYdmCjSefFEu5

[hoshitomo]

La galassia M82, nella costellazione dell'Orsa Maggiore, è una delle galassie che compongono il gruppo M81, un vicino del gruppo locale della Via Lattea. Dista circa 12 milioni di anni luce dalla Terra. Si trova a distanza ravvicinata, circa 300.000 anni luce, dalla più grande Galassia di Bode (M81) e circa 250 milioni di anni fa si trovava ancora più vicina ad essa: ciò ha causato uno grande scambio di materia tra le due galassie; inoltre è stata deformata dall'immensa interazione gravitazionale. Queste forze di interazione e questi scambi di materia hanno fatto sì che vi sia tuttora un altissimo tasso di formazione di stelle, addirittura 10 volte il normale. Per questo motivo M82 viene definita una "galassia starburst".

Tra le diverse foto scattate, questa è stata probabilmente quella di realizzazione più difficile, per condizioni metereologiche e per lo strumento utilizzato. M82 è un oggetto abbastanza piccolo nel cielo, la dimensione maggiore è circa un terzo il diametro apparente della Luna, e per ottenere qualche dettaglio del nucleo ho utilizzato la lunghezza focale massima che posso ottenere dalla mia attuale strumentazione. Così come è difficile scattare foto con un teleobiettivo per il rischio che le foto vengano mosse, lo stesso succede per i telescopi, maggiore è la lunghezza focale, maggiore è la difficoltà di inseguire un oggetto nel cielo, difficoltà ancora maggiori poi per la presenza costante di brezza durante le riprese. M82 poi passa anche a poca distanza dal tetto di casa, e ciò riduce il numero di ore di visibilità. Il tempo totale di esposizione è stato di oltre 15 ore.

おおぐま座にある銀河 M82 は、天の川銀河の局部銀河群の隣に位置する M81 グループを構成する銀河の 1 つです。それは地球から約1200万光年離れています。この銀河は、より大きなボーデ銀河 (M81) から約 30 万光年の距離に位置しており、約 2 億 5000 万年前にはさらに近かったため、2 つの銀河間で大規模な物質交換が行われました。また、巨大な重力相互作用によっても変形しました。これらの相互作用力と物質の交換により、星形成率は依然として非常に高く、通常の 10 倍にも達します。このため、M82 は「スターバースト銀河」と呼ばれています。

撮影したさまざまな写真の中で、気象条件と使用した機器のせいで、おそらくこれが最も撮影が難しかった写真です。 M82 は空の中ではかなり小さな天体で、最大サイズは月の見かけの直径の約 3 分の 1 です。核の詳細を捉えるために、現在の機器で得られる最大焦点距離を使用しました。望遠レンズで写真を撮ると写真がぼやけてしまう恐れがあるため難しいのと同様に、望遠鏡でも同じことが言えます。焦点距離が長くなるほど、空の物体を追跡することが難しくなり、撮影中に常に風が吹くと、追跡はさらに難しくなります。 M82 も家の屋根から少し離れたところを通過するため、視認できる時間が短くなります。総露出時間は15時間を超えました。

The galaxy M82, in the constellation of Ursa Major, is one of the galaxies that make up the M81 group, a neighbor of the Local Group of the Milky Way. It is about 12 million light years from Earth. It is located at a close distance, about 300,000 light years, from the larger Bode Galaxy (M81) and about 250 million years ago it was even closer to it: this caused a large exchange of matter between the two galaxies; it was also deformed by the immense gravitational interaction. These interaction forces and these exchanges of matter have caused there to still be a very high rate of star formation, even 10 times the normal rate. For this reason M82 is called a "starburst galaxy".

Among the various photos taken, this was probably the most difficult to make, due to weather conditions and the instrument used. M82 is a fairly small object in the sky, its largest dimension is about a third of the apparent diameter of the Moon, and to get some details of the nucleus I used the maximum focal length that I can get from my current equipment. Just as it is difficult to take pictures with a telephoto lens because of the risk of blurry photos, the same happens for telescopes, the longer the focal length, the more difficult it is to track an object in the sky, even more difficult then for the constant presence of a breeze during the shots. M82 also passes a short distance from the roof of the house, and this reduces the number of hours of visibility. The total exposure time was over 15 hours. Scope: Celestron Nexstar 6SE on Celestron AVX mount Camera: ZWO ASI294MC Pro Aperture: 150 mm, focal length: 1642 mm, f/11 Exposure: 50 frames @ 60s @ -20°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 530 frames @ 60s @ -15°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 39 frames @ 180s @ -15°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 222 frames @ 60s @ -10°C, gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 7

Hi-Res: https://photos.app.goo.gl/UynKg6a5wHJuvj7Q9

[hoshitomo]

February, March and April are the season of galaxies! In fact, these are the months in which countless galaxies are visible, some of which are very far away. This is M95, in the constellation of Leo, a galaxy in the shape of a barred spiral. It is slightly smaller than the Milky Way and is located about 35 million light-years away, which means that the image seen here began its journey towards us 35 million years ago, when the Alps began to form. But there's more to this photo! Other galaxies much more distant can also be seen, from top to bottom PGC 31971, PGC 31980 and PGC 31984 (circled in red), all about 115 million light-years away.

Scope: Celestron Nexstar 6SE on Celestron AVX mount Lens: Celestron 0.63 focal reducer Camera: ZWO ASI294MC Pro Aperture: 150 mm, focal length: 1069 mm, f7.1 Exposure: 121 frames @ 180s @ -20°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) 200 frames @ 60s @ -8°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Gimp

Bortle 7

Hi-Res: https://photos.app.goo.gl/Nu267moGF1Lk7jJRA

[hoshitomo]

Heart nebula (IC1805) is an emissione nebula in the constellation Cassiopeia, near the constellation Camelopardalis. It is 7500 light years away from Earth. In the middle the Melotte 15 open cluster of start can be also seen.

It took four days at the end of last November to capture this image.

In this period of the year many emission nebulas can be seen, these are made up of hydrogen ionized by the surrounding stars, just alike what happens in a neon lamp, in which the gas is ionized by the flowing electricity. The ionized hydrogen lends the typical red color.

Scope: Svbony SV503 80 ED on Celestron AVX mount Camera: ZWO ASI294MC Pro Lens: Svbony 0.8 Focal Reducer / Field Flattener Aperture: 80 mm, focal length (FL): 448 mm, f/5.6 Guidescope: Svbony SV106 Guidescope camera: ZWO ASI120MM Panel 1: 173 frames @ 180s @ -10°C, gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Panel 2: 172 frames @ 180s @ -10°C, gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Software: N.I.N.A., PHD2, GraXpertAI, ASTAP, Siril, Starnet, Siril IC, Rawtherapee, Gimp

Bortle 7

Hi-res: https://photos.app.goo.gl/y6k9jrQhHKZoGJ3H6

[hoshitomo]

Christmas Tree cluster (NGC2264) is a star cluster in the Monoceros constellation, 2700 light years away from Earth. It shares the designation NGC2264 with the Cone emission nebula (the "tip" of the Christmas tree). The stars in the middle are very young, only 1-4 million years old (for comparison the Sun is 4.7 billion years old), among them the brightest is 15 Monocerotis (middle), which is also the only one visible with the naked eye from a dark place. Scope: Svbony SV503 80 ED on Celestron AVX mount Camera: ZWO ASI294MC Pro Lens: Svbony 0.8 Focal Reducer / Field Flattener Aperture: 80 mm, focal length (FL): 448 mm, f/5.6 Guidescope: Svbony SV106 Guidescope camera: ZWO ASI120MM 177 frames @ 180s @ -10°C, gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Rawtherapee

Bortle 7

Hi-res https://photos.app.goo.gl/hfMUPDaeAkikiWzq9

[hoshitomo]

Could you imagine that the Pleiades look this way?

The Pleiades (M45), also known as “the seven sisters” are an open star cluster in the Taurus constellation. They are 443 light-years away and the biggest stars are within a 8 light-years radius. These stars are young, about 100 million years old (for comparison the Sun is 4.7 billion years old). They are also very bright stars, they can be seen even from cities with a mild light pollution.

Scope: Svbony SV503 80 ED on Celestron AVX mount Camera: ZWO ASI294MC Pro Lens: Svbony 0.8 Focal Reducer / Field Flattener Aperture: 80 mm, focal length (FL): 448 mm, f/5.6 Guidescope: Svbony SV106 Guidescope camera: ZWO ASI120MM 213 frames @ 180s @ -10°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Rawtherapee, Gimp

Bortle 7 Hi-res: https://photos.app.goo.gl/DpNtV6uYziYMNcBe6

[hoshitomo]

After months of bad weather, cold, nice weather has arrived and finally the ability to capture the night sky has come too! Triangulum galaxy (M33) is in the Triangulum constellation. It's about 3 million light-years far away. Together with the Milky Way and Andromeda galaxy it is assembled in the so-called "Local Group", and it is smaller than the other two.

Scope: Svbony SV503 80 ED on Celestron AVX mount Camera: ZWO ASI294MC Pro Lens: Svbony 0.8 Focal Reducer / Field Flattener Aperture: 80 mm, focal length (FL): 448 mm, f/5.6 Guidescope: Svbony SV106 Guidescope camera: ZWO ASI120MM 347 frames @ 180s @ -10°C, gain 121 offset 5 + calibration frames (ZWO UV/IR cut filter) Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril, Starnet, Siril IC, Rawtherapee, Gimp

Bortle 7 Hi-res: https://photos.app.goo.gl/vtemqhSn1GnztXtd9

[hoshitomo]

Andromeda Galaxy (M31) is in the Andromeda Constellation. Among the major galaxies, it is the closest to the Milky Way and it's around double its size. Its shape is a spiral with a diameter of around 152,000 light-years and it's 2.5 million light-years far away. It contains around 1 trillion stars and it has two little satellite galaxies, M32, the small galaxy near Andromeda's center and M110, the bigger galaxy on the bottom. Andromeda Galaxy, its small satellite galaxies M32 and M110, the Milky Way and its satellite galaxies are assembled in the so-called "Local Group". Andromeda is one of the objects in space which is closing to Earth and will collide with the Milky Way in around 2,5 billion years.

Scope: Svbony SV503 80 ED on Celestron AVX mount Camera: ZWO ASI294MC Pro Lens: Svbony 0.8 Focal Reducer / Field Flattener Aperture: 80 mm, focal length (FL): 448 mm, f/5.6 Guidescope: Svbony SV106 Guidescope camera: ZWO ASI120MM 157 frames @ 180s @ 0°C, gain 121 offset 30 + calibration frames (ZWO UV/IR cut filter) 50 frames @ 300s @ -10°C gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) 80 frames @ 180s @ -10°C gain 121 offset 5 + calibration frames (Sightron Quad BP filter - III) Software: N.I.N.A., PHD2, GraXpertAI, Siril, Starnet, Siril IC, Rawtherapee, Gimp

Bortle 7

HiRes: https://photos.app.goo.gl/YLsFvS9pMKdwSPVE7

[hoshitomo]

In a brief break from bad weather I managed to shoot this picture of the North America nebula (NGC7000) and the Pelican nebula (IC5070). Targets are close to the star Deneb, one of the so-called "Summer Triangle" stars, in the Cygnus constellation. Both nebulas belong actually to the very same emission nebula of ionized hydrogen (HII), optically split apart by a superimposed dark nebula (LBN935) which expands from the area resembling the Gulf of Mexico up to the area resembling the Pelican's head.

Since the targets are wider than my scope's field of view I shot the nebulas separately and then recomposed them in a mosaic. Overall these are about 15 hours of data, taken with N.I.N.A. Only a UV/IR cut filter has been used. Stacking performed with Sirilic, background extraction and denoising with GraXpert AI, mosaic composition with ASTAP, most of processing performing with Siril/Starnet and minor adjustments with Gimp and Rawtherapee.

It was my very first time attempting a mosaic so it took a while to get the right combination of ASTAP parameters to achieve a seamless picture.

Hope you enjoy the pic and leave a comment if you like!

Scope: Svbony SV503 80 ED on Celestron AVX mount Camera: ZWO ASI294MC Pro with IR/UV cut filter Lens: Svbony 0.8 Focal Reducer / Field Flattener Guidescope: Svbony SV106 Guidescope camera: ZWO ASI120MM 2-panels mosaic NGC7000: 133 frames @ 180s @ 0°C, gain 121 offset 30 + calibration frames IC5070: 133 frames @ 180s @ 0°C, gain 121 offset 30 + calibration frames Software: N.I.N.A., PHD2, GraXpertAI, Siril, ASTAP, Starnet, Rawtherapee, Gimp

Kashiwa, Japan, Bortle 7

Hi-res pic: https://photos.app.goo.gl/fF96eCT6xe5Qc3c39

[hoshitomo]

Jupiter's rotation timelapse! In September 2022, when Jupiter reached its closest approach to Earth in 59 years, I did a recording of 1 hour of Jupiter's rotation. Jupiter exhibits a fast rotation, its day being only 9 hours and 55 minutes long. On the right its satellites Europa and Io are also visible.

Scope: Celestron Nexstar 6SE on DIY Wedge

Lens: Celestron X - Cel LX Barlow 2X

Camera: ZWO ASI224MC

135058 frames @ 25 ms, gain 35%

Software: Firecapture, Autostakkert!3, Registax 6, Gimp, Kdenlive, ffmpeg

Kashiwa, Japan, Bortle 7

[hoshitomo]

Rosette nebula (NGC2237) is an emission nebula of the Monoceros constellation located between Betelgeuse and Procyon. Its distance is 5200 light years and the diameter across is 130 light years. Nebula's gases are excited by the star cluster (NGC2244) in the middle.

Scope: Svbony SV503 80 ED on Celestron AVX mount

Camera: Canon EOS 500D / Kiss X3 (unmodified) with Optolong L-PRO filter

Lens: Svbony 0.8 Focal Reducer / Field Flattener

Aperture: 80 mm, focal length: 448 mm, f5.6

Guidescope: Svbony SV106

Guidescope camera: ZWO ASI224MC

302 frames @ 300s, 400 ISO + calibration frames

25 hours 10 minutes total integration time

Software: CPWI, Stellarium, N.i.n.a., PHD2, Deep Sky Stacker, GraXpertAI, Siril, Gimp

Kashiwa, Japan, Bortle 7

[hoshitomo]

The Horsehead nebula (IC434, distance 1500 light years) in the Orion constellation is an emission nebula (in red) with a superimposed dark nebula with the shape of a horse's head. In this picture another emission nebula, the Flame Nebula (NGC2024, distance 900-1500 light years) can be seen, just under the star Alnitak (zeta Orionis, distance 1300 light years), the leftmost star of Orion's belt. Also NGC2023 (distance 1300 light years), IC431 (distance 988 light years), IC432 (distance 1075 light years) and IC435 (distance 1793 light years) reflection nebulas can also be seen.

Scope: Svbony SV503 80 ED on Celestron AVX mount

Camera: Canon EOS 500D / Kiss X3 (unmodified) with Optolong L-PRO filter

Lens: Svbony 0.8 Focal Reducer / Field Flattener

Aperture: 80 mm, focal length: 448 mm, f5.6

Guidescope: Svbony SV106

Guidescope camera: ZWO ASI224MC

354 frames @ 180s, 400 ISO + 100 frames @ 300s, 400 ISO + calibration frames

26 hours 2 minutes total integration time

Software: CPWI, Stellarium, N.i.n.a., PHD2 (Guiding), Deep Sky Stacker, GraXpertAI, Siril, Gimp

Kashiwa, Japan, Bortle 7