DSO 遺照集 -- Eta

[LT]

這個相簿集的名明看起來是不是有點嚇人？但又是事實呀。

話說這麼多年來拍下了不少數據，但很多都塵藏於硬碟肉未曾處理過。有些是較好的，但也有不少的質素是不佳的。踏入2020年後，我在業餘天文攝影上將會有轉變，所以便下定決心 ==> 除舊，重新上路。

但又覺得就這樣將質素不佳的 data 直接地從硬碟中 "永久地" 刪除，好像對記錄了下來的 data 有點不尊重，所以想在他們 "灰飛煙沒" 前，來一個簡簡單單的處理，露一露面，輯成一個相集，方便瞻仰遺容。

1. NGC5139

Color data l: taken with EF400mm F5.6L + 40Da in Australia @F5.6, autoguided with Vixen GP mount
L channel: taken with Vixen ED81S + 1600MM in Australia @624mm F7.7, autoguided with Vixen AP mount
Combined in PI

NGC5139_L_40Da.jpg (1.03 MiB) 已瀏覽 19561 次

[LT]

2. M104

Taken with Vixen VC200L + reducer + 1600MM in PTC in 2018 @1280mm F6.4
R:G:B = 1x240s : 1x240s : 1x240s
No dark, no bias, no flat calibrated

M104_RGB_crop.jpg (796.43 KiB) 已瀏覽 19570 次

[LT]

3. M1

Taken with DIY 30cm F4 Newtonian + paracorr + Atik 383L+ mono in PTC
LRGB combined in PI
Autoguided with Vixen AXD mount

(當見到星點好似雞蛋般大，就知道seeing有幾好........差呢!!!)

M1_LRGB_crop.jpg (643.13 KiB) 已瀏覽 19575 次

[Eddy So]

[LT]

4. M94

Taken with Vixen R200SS (20cm F4) Newtonian + MPCC3 + Atik 383L mono in PTC @800mm F4
LRGB = 10x240s : R=G=B=4x240s @binning 2x2, combined in PI
Autoguided with Vixen SX2 mount

It is quite challenging to shoot galaxies in Hong Kong due to the night sky is so light and air polluted.

M94_LRGB_crop.jpg (582.96 KiB) 已瀏覽 19513 次

[Eddy So]

[Wongsir]

[LT]

5. Leo Triplet

Taken with Vixen R200SS (20cm F4) Newtonian + MPCC3 + Atik 383L mono in PTC in 2017 @800mm F4
LRGB = 11x360s : R=G=B=4x240s @binning 2x2, combined in PI
Autoguided with Vixen SX2 mount

So many donuts!! I think no one would like them on the image. So, deleted.

Leo-triplet_LRGB.jpg (1.23 MiB) 已瀏覽 19475 次

[Eddy So]

[LT]

6. NGC281

Taken with DIY 6" F5 Newtonian + MPCC + 300Da in PTC in 2010 @750mm F5
13x180s @iso800, autoguided with Vixen SXD mount

SN ratio very low. Moreover, no dark, no bias, no flat calibrated in DSS. So, deleted too.

NGC281_300Da_13x180s_iso800.jpg (729.43 KiB) 已瀏覽 19400 次

[Eddy So]

[LT]

7. M97

Taken with DIY 6" F5 + MPCC + 300Da from TMS in 2009 @750mm F5
Autoguided with Vixen SXD mount

M97_crop.jpg (129.99 KiB) 已瀏覽 19373 次

[Eddy So]

[LT]

8. M53

Taken with DIY 6" F5 Newtonian + MPCC + 300Da in TMS, HK in 2009 @750mm F5
10x240 @iso400, autoguided with Vixen SXD mount

M53_6F5_TMS.jpg (572.52 KiB) 已瀏覽 19336 次

[Eddy So]