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Open Cluster
Trumpler 37


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

Trumpler 37 open cluster Mars 19, 2020 (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 : EQ6 controlled by EQMOD
Guide : PHD2 in dithering mode, QHY5 camera, 400 mm f/6.3 guide telescope
Lens/telescope : TS130, 910mm f/7
Corrector/Barlow : Field flattener 3" x1
Filter : none
camera : Canon 6D, controlled by APT software
Film/CCD : Raw
Exp. time : 115x60 seconds, iso1600
Image process tool : AstroImageJ, Fitswork, Irfanview
Processing : level, synthetic cal flat, dithering no bias & dark
Weather : clear sky
Site : Sweden, Stockholm, Hagsätra
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

Trumpler 37 open cluster April 12, 2016 (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 : EQ6 controlled by EQMOD
Guide : PHD2, QHY5 camera, off-axis guider
Lens/telescope : TS130, 910mm f/7 (f/5.3)
Corrector/Barlow : Riccardi field flattener 2.5" x0.75
Filter : none
camera : Canon 6D, controlled by APT software
Film/CCD : Raw
Exp. time : 60x60 seconds, iso1600
Image process tool : AstroImageJ, Fitswork, Irfanview
Processing : level, synthetic cal flat, dithering no bias & dark
Weather : clear sky
Site : Sweden, Stockholm, Hagsätra
Comment : I couldn't find very much information about this object. But it came from the astronomer Trumpler's catalogue.
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