C/2020 F3 NEOWISE
Wrong telescope for a comet of this size (8 degree – only 0.5 degree FOV) but came out quite well. Surprising colour combinations – green coma expected, red tail not. Cloned out the trailed RGB stars in PS.
| Object ID | C/2020 F3 NEOWISE |
| Details | 2020-07-18 23:22UT |
| Telescope | 250mm f4.8 Newtonian |
| Camera | Atik 460EX @-15C |
| Exposure(s) | 5×30 each RGB Darks |
| Capture | APT |
| Processing | SiriL, DSS, Photoshop |
Comet 46P/Wirtanen
Getting larger and diffuse.
| Object ID | Coment 46P/Wirtanen |
| Details | 2018-12-09 19:30 – 19:56 UT |
| Telescope | 250mm f4.8 Newtonian IDAS P2, MPCC |
| Camera | Canon 600D |
| Exposure(s) | 30 x 40s ISO 800 |
| Capture | APT |
| Processing | Deep Sky Stacker comet mode Photoshop |
Comet 21P/Giacobini-Zinner brightening and tail developing
Tail starting to develop and definitely getting brighter
| Object ID | 21P/Giacobini-Zinner |
| Details | 2018-08-16 22:09:30 – 22:23:23 UT |
| Telescope | 200mm Newtonian f5 |
| Camera | ZWO ASI290MC |
| Exposure(s) | 20 x 15s, 30s delay between exposures |
| Capture | SharpCap |
| Processing | Nebulosity, Photoshop |
Comet 21P/Giacobin-Zinner animation
Moving through the constellation of Cassiopeia
| Object ID | 21P/Giacobini-Zinner |
| Details | 2018-08-03 22:12 – 22:25 UT Approx. mag. 9 |
| Telescope | 200mm Newtonian f5 |
| Camera | ZWO ASI 290MC |
| Exposure(s) | 20 x 10s exposures, 30seconds apart |
| Capture | SharpCap |
| Processing | Photoshop |
103P/Hartley
2010-09-07 21:00 UT
200mm f5 Newtonian SW LPR MPCC
Canon EOS 350D Guided
5x60s 5x90s 3x120s subs darks ISO 800
Processed in Nebulosity, PhotoShop CS5
Also 1 frame to show comet against star field without trailing.
From Wikipedia: Comet Hartley 2, officially designated 103P/Hartley, is a small periodic comet with an orbital period of 6.46 years. It was discovered by Malcolm Hartley in 1986 at the Schmidt Telescope Unit in Siding Spring, Australia. Its diameter is estimated to be 1.2 to 1.6 km. It will be the subject of a flyby by the Deep Impact spacecraft on November 4, 2010, with a closest approach of 700 kilometers. This is part of the EPOXI mission.
And here’s NASA’s view of it from the EPOXI mission.
17P/Holmes
5-11-2007
180mm f15 Mak-Cass, Canon EOS 350D
Subs: 10x25s
Re-processed in Nebulosity and PhotoShop CS3
Was it really this green?