以管窺天集:M101

Observing (Deep Sky) - 星雲、星團、星系攝影及觀測

Re: 以管窺天集:雙子天文莊園之旅

文章

willis » 2020-04-11, 15:59

去年聖誕去了雲南攝星,除了主要的目的地雙子天文莊園外,也到過麗江一帶遊走。 去到麗江除了麗江古城和束河古城外,玉龍雪山基本上是必到的景點。雖然不是第一次到雲南玉龍雪山,但玉龍雪山的景區甚多,不計不同季節的景色,基本上要去幾次才能欣賞點滴。今次除了天文攝影外,也有旅遊的元素。所以也帶了較多的相機鏡頭。 有一天,遊覽完玉龍雪山,回程時發現有一個位置相當適合作星野攝影。晚飯後,就立即找司機去這個有山有水寧靜的地方拍攝。在夜靜無人,漆黑的星空下和近零度的環境拍攝是非常具挑戰。老實說在這些曠野地方,如果一個人真是沒有膽量停留拍攝。我們一行三人在這個地方互相壯膽,戰鬥了三小時,然後回酒店休息。

回港後一直很忙,因新冠肺炎等,學校被迫停課。學校是機動的,有不同的情況便有不同的行政安排,真正做到停課不停學。結果就是忙過不停,所有拍回來的天文相都沒有時間處理。最後解決方法就是縮短休息時間,騰出空間,暫時處理兩張較簡單的星野相片。

玉龍極目見穹蒼
拍攝資料: D810A, Tamron 15-30/2.8 @17mm f 2.8, ISO 6400, 1 mins

玉龍虎伏白水河,星宿運轉凋零夜
拍攝資料: D810A, Tamron 15-30/2.8 @17mm f 2.8, ISO 6400, 1 mins x 123

I went to Yunnan last Christmas for a hybrid trip of astrophotography and site seeing. Apart from the Gemini Observatory, the Old Town of Lijiang is certainly a fascinating mix and match of different Chinese culture of ethnic groups. The Yulong Snow Mountain is a must visit spot. There are many scenic spots in Yulong Snow Mountain. Regardless of the scenery in different seasons, it is basically necessary to go a few times to enjoy the bits and pieces. In addition to astrophotography, there are also elements of tourism this time. So, I brought more camera lenses to suit the situation. One day after returning from Yulong Snow Mountain, I found a location that is suitable for Astro-nightscape photography. After dinner that night, I asked a driver to take us to this quiet place. The site was dead lonely. On the frozen field beneath the starry night, it was very challenging to take photos. Honestly, in these wilderness areas, I dare not to photo on my own! Luckily, We three supported one another and struggled for three hours. When we backed to the hotel, we were all exhausted!

After returning to Hong Kong, the school was forced to suspend classes due to the novel coronavirus outbreak. The school is very busy to cope with the situation. As a result, I didn't have time to process the photos. Finally, I shorten my resting time and make room to temporarily process two Astro-nightscape photos.

Yulong seeing the heaven.
Photographic details: D810A, Tamron 15-30/2.8 @17mm f 2.8, ISO 6400, 1 mins x 1

Yulong lurked nearby silvery river and under the spinning stars.
Photographic details: D810A, Tamron 15-30/2.8 @17mm f 2.8, ISO 6400, 1 mins x 123
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玉龍雪山(白水河段)_3000.jpg
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Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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willis
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文章: 1526
註冊時間: 2010-02-01, 17:50
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Re: 以管窺天集:雙子天文莊園之旅(續)

文章willis » 2020-04-17, 00:41

繼續雲南雙子天文莊園之旅。在優質的星空下,有很多在香港拍得不好,甚至乎拍不到的深空天體,都變得有可能。我曾在北潭涌試過用Duo Narrow band filter和D810A拍過意粉星雲,但效果不佳。今次終於有機會到雲南把她拍下來。那晚第一幅在D810A的機背照片的preview已看到意粉星雲,心裏那分喜悅真想大叫出來,當然周圍都有天文同好在努力拍攝中,大叫只會打擾其他人,克制興奮的心情繼續在優美且寧靜的星空下靜靜地繼續拍攝…
拍攝資料: Nikon D810A, WO Space Cat, STC Duo-Narrowband, ISO 6400, 10 mins x 17


Yunnan Gemini Observatory (Continue). High quality clear skies are indispensable! Imaging those difficult deep sky objects becomes possible! Once I tried to image the Spaghetti nebula in Pak Tam Chung with a Duo Narrow band filter and D810A. Perhaps I got really faint and noisy image, the light plluation just ruined it. In Yunnan, under the high quality starry sky, those faint deep-sky objects are possible to be imaged. This time I finally got the opportunity to come to grap them. The first preview of Spaghetti Nebula from the screen of D810A made me scream from the bottom of my heart. Of course, there were amateurs around, who were concentrated on their imaging, screaming would only disturb other people. I suppressed my excitement and continued shooting under the beautiful and peaceful starry sky.

Photographic details: Nikon D810A, WO Space Cat, STC Duo-Narrowband, ISO 6400, 10 mins x 17

Spaghetti Nebula
Location: Gemini Observatory, Lijiang, Yunnan, China
Date: 27-12-2019
Photographic details: Nikon D810A, WO Space Cat, STC Duo-Narrowband, ISO 6400, 10 mins x 17
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Spaghetti_Nebula_SpaceCat_D810A_Duo_3_3000.jpg
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Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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willis
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文章: 1526
註冊時間: 2010-02-01, 17:50
來自: HK

Re: 以管窺天集:雙子天文莊園之旅(續 II)

文章willis » 2020-04-18, 22:02

獨角的珠寶
繼續雲南雙子天文莊園之旅 II。雖然玫瑰星雲和聖誕樹星雲都能在香港拍攝到,去到雲南的優質星空下,重點是拍到更多的細節和背景的微弱IFN和Ha的雲氣。麒麟座內的玫瑰和聖誕樹的背景就正正有著豐富的Ha雲氣,這張四小時多的曝光照片算是不負期望。由於這張相是用了Duo Narrowband濾鏡拍攝,亦發現當中雲氣有不少藍色的訊號,除了處理常規的顏色, 我亦額外用PixelMath作了一次模擬哈勃色的SHO處理,不知道你喜歡哪一張?
拍攝地點: 雲南雙子天文莊園
日期:28-12-2019
拍攝資料: Nikon D810A, WO Space Cat, STC Duo-Narrowband, SW AZEQ 6, ISO 6400, 10 mins x 25, PixInsight

The Treasure of Unicorn
Gemini Observatory (Continue II). Although both the Rosette Nebula and the Christmas Tree Nebula can be imaged in Hong Kong, under the high-quality starry sky in Yunnan, the main focus is on capturing more details and the weak IFN and Ha nebulosity in the background. The background of the Rosette and the Christmas tree Nebulae in the Monoceros has a rich Ha nebulosity. This four-hour exposure is pleasing. I used the Duo Narrowband filter and both Ha and OIII signals were well gathered. I found that there were reasonably high blue signals in the nebulosity. In addition to the conventional color processing, I also used PixelMath to do a SHO simulation of Hubble color. Which one do you like the best?
Location: Location: Gemini Observatory, Lijiang, Yunnan, China
Date: 28-12-2019
Photographic details: Nikon D810A, WO Space Cat, STC Duo-Narrowband, SW AZEQ 6, ISO 6400, 10 mins x 25, PixInsight
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Rosette_and_Cone_Nebulae_3000.jpg
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Rosette and Cone Nebulas(SHO)_3000.jpg
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Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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willis
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文章: 1526
註冊時間: 2010-02-01, 17:50
來自: HK

Re: 以管窺天集:雙子天文莊園之旅(續 III)

文章willis » 2020-04-22, 22:39

The pets of Cepheus
Gemini Observatory (Continue III). If you want to image the Elephant Trunk Nebula (IC 1396) and the Flying Bat Nebula (SH2-129) in Hong Kong, it would be difficult. Even you use narrow-band filters, you may only be able to image them, but not in good quality. It’s a bit difficult to image them well in Hong Kong. Friends who have tried shooting the bat nebula also know that the squid nebula (OU4) is actually buried in the belly of the bat. Since the O III signal of the Squid nebula is so weak, even in a high-quality sky, it is difficult to make it appear in less than ten hours of exposure. After a thoughtful planning, I used a short focal length telescope in Gemini Observatory, hoping to catch all the pets of Cepheus. As expected, the four hours exposure could not unveil the squid inside the bat's belly. In order to fulfil my own wish, I merged both the Ha and OIII data of the bats obtained from the Gaoyazi Remote Observatory in Xinjiang and the data obtained from Gemini Observatory in Yunnan. The final image is the pets of Cepheus!
Location: Location: Gemini Observatory, Lijiang, Yunnan, China / Gaoyazi Remote Observatory, Dabancheng, Xinjiang, China
Date: 26-12-2019(Gemini)/ 11-12/2019(Gaoyazi)
Photographic details: Wide field RGB (Gemini,Nikon D810A, WO Space Cat, STC Duo-Narrowband, SW AZEQ 6, ISO 6400, 10min x 25),OU4’s Ha and OIII(Gaoyazi,SW 120ED, SW EQ6, QHY 163M, Optolong Ha and OIII, 24hrs)

仙王的寵物
繼續雲南雙子天文莊園之旅III。如果要在香港拍攝象鼻星雲(IC 1396)和蝙蝠星雲(SH2-129)是有一定的難度,就算用上窄頻濾鏡或許只能拍到,要拍攝得好,也要點運氣。有嘗試過拍攝蝙蝠星雲的朋友也知道,蝙蝠的腹裡其實埋藏著魷魚星雲(OU4)。由於魷魚星雲的O III信號非常弱,就算在優質的天空下,不上十小時的曝光也難以令它現身。今次到雙子天文台,經計算後用短焦的望鏡同時收納象鼻和蝙蝠,一如所料四小時的曝光不能令蝙蝠腹裏的魷魚現身,為了實現心願,我把早前在新疆高崖子遙控天文台的蝙蝠的Ha和O III數據和雙子的數據合併,令到仙王座的寵物全部呈現眼前!拍攝地點: 雲南雙子天文莊園/新疆高崖子遙控天文台
日期:26-12-2019(雙子)/ 11-12/2019(高崖子)
拍攝資料: 廣域RGB (雙子,Nikon D810A, WO Space Cat, STC Duo-Narrowband, SW AZEQ 6, ISO 6400, 10min x 25),OU4的Ha和OIII(高崖子,SW 120ED, SW EQ6, QHY 163M, Optolong Ha and OIII, 24hrs)
附加檔案
Elephant Trunk n Bat n Squid_3000.jpg
Elephant Trunk n Bat n Squid_3000.jpg (1.41 MiB) 被瀏覽 1146 次
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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willis
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文章: 1526
註冊時間: 2010-02-01, 17:50
來自: HK

Re: 以管窺天集:銀河下的藍眼淚

文章willis » 2020-05-06, 01:56

銀河下的藍眼淚
五一的凌晨是神奇精彩的一晚!在香港見過銀河,也見過藍眼淚。但兩樣同時見到,就是第一次!更幸運的是除了看到也成功拍到! 唔知有沒有機會在香港再來一次!

The blue tears under the Milky Way
The early morning of May 1 is a wonderful and astonishing night! I’ve seen both Milky Way and sea sparkle in Hong Kong individually. However, this was my first time to see them simultaneously and I was so fortunate to picture them too! Luck is luck and couldn’t ask more.
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Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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willis
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文章: 1526
註冊時間: 2010-02-01, 17:50
來自: HK

Re: 以管窺天集:M101

文章willis » 2020-05-14, 21:46

M101
I am so slow to process my image data. This M101 has been waited for several months before publish. There are still some more data from both Gaoyazi Observatory and Gemini Observatory… I wish to process and showcase them before the start of next academic year.
Location: Gaoyazi Observatory, Dabancheng, Xinjiang, China
Date: 12/2019-1/2020
Photographic details: HaRGB 29hrs, Skywatcher 120ED, Skywatcher 0.85x, QHY 163M, QHY 7 filter wheel, Optolong LRGB and SHO filter set, QHY OAG, Skywatcher EQ6, ZWO ASI 120MM Mini guider
Post-procoessing: PixInsight
M101
我處理天文相數據太慢了。 M101已等了幾個月才亮相。 事實上還有新疆高崖子天文台和麗江雙子天文台的數據等待處理……我希望在下學年開始前能讓他們一一面世。
地點:中國新疆達坂城高崖子天文台
拍攝日期:12/2019-1/2020
拍攝資料:HaRGB 29hrs, Skywatcher 120ED, Skywatcher 0.85x, QHY 163M, QHY 7 濾鏡輪, Optolong LRGB and SHO 濾鏡, QHY OAG, Skywatcher EQ6, ZWO ASI 120MM Mini 導星相機
後製:PixInsight
附加檔案
M101_HB_05_DBE_2.jpg
M101_HB_05_DBE_2.jpg (807.03 KiB) 被瀏覽 1018 次
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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willis
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文章: 1526
註冊時間: 2010-02-01, 17:50
來自: HK

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