English
|
Advertisement / Annons: |
Open Cluster
|
| Object : | Trumpler 37 |
| Coordinates/Direction : | RA: 21h43m, DEC: +58o46' |
| Object size : | - |
| Object magnitude : | - |
| More to know : |
Wikipedia: https://en.wikipedia.org/ wiki/ Robert Julius Trumpler |
Trumpler 37 2020-03-19
(click on the image to get a full resolution photo in a new window) |
| Date : | 2020-03-19 |
| Time (UT) : | 22:57 to 01:40 |
| Mount : | SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019) |
| Guide : | QHY5 camera with 400 mm f/6.3 lens |
| Lens/telescope : | TS130 APO f/7 910mm, 3" focuser |
| Corrector/Barlow : | 3" field flatter, x1. T48 connector to camera |
| Field (FOV) : | 2.25 x 1.5o (full frame) before crop |
| camera : | Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit |
| camera temperature: | About 6o C above surrounding temperature |
| Film/CCD : | Raw, Cr2 |
| Filter : | none |
| Control system : | Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC |
| Exp. time : | 115x60 seconds, iso1600, dithering mode |
| Image process tool : | AstroImageJ, Fitswork, Irfanview |
| Processing : | level, synthetic cal flat, dithering no bias & dark |
| Weather : | clear sky |
| Comment : | Compare these photo with that below. Two different setup of the telescope, one with a x1 field flattener and the other with x0.75. Both of high quality but the x0.75 can't handle a full frame sensor. When I use the x0.75 field flattener I have to crop the image. The image's sub images are not perfect aligned, sometimes it's difficult with the software I use. But with a little bit more time and adjusting the parameters it should be better. |
Trumpler 37 2016-04-12
(click on the image to get a full resolution photo in a new window) |
| Date : | 2016-04-12 |
| Time (UT) : | 22:47 to 00:14 |
| Mount : | SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019) |
| Guide : | QHY5 camera with off-axis |
| Lens/telescope : | TS130 APO f/7 910mm, 3" focuser |
| Corrector/Barlow : | 3" field flatter, x1. T48 connector to camera |
| Field (FOV) : | 2.25 x 1.5o (full frame) before crop |
| camera : | Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit |
| camera temperature: | About 6o C above surrounding temperature |
| Film/CCD : | Raw, Cr2 |
| Filter : | none |
| Control system : | Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC |
| Exp. time : | 60x60 seconds, iso1600, dithering mode |
| Image process tool : | AstroImageJ, Fitswork, Irfanview |
| Processing : | level, synthetic cal flat, dithering no bias & dark |
| Weather : | clear sky |
| Comment : | I couldn't find very much information about this object. But it came from the astronomer Trumpler's catalogue. |
|
| Go Back |