| Object : | NGC 6939 |
| Coordinates/Direction : | RA: 20h31m, DEC: +60o39' |
| Object size : | 7' |
| Object magnitude : | 7.8 |
| More to know : |
Wikipedia:
https://en.wikipedia.org/ wiki/ NGC 6939 |
| Date : | 2023-03-03 |
| Time (UT) : | 22:24 to 23:44 |
| Mount : | Skywatcher EQ6 Pro controlled by EQMOD and
KStars Ekos/Indi |
| Guide : | Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens |
| Lens/telescope : | Pentax 645 300 mm ED f/4, external focus motor,
Pentax 645 project page |
| Corrector/Barlow : | - |
| Field (FOV) : | 6.8x4.5 degree, before cropping |
| Filter : | none |
| camera : | Canon 6D, temperature +8 C. Controlled by
KStars Ekos/Indi |
| Film/CCD : | Raw |
| Exp. time : | 60x60 seconds, iso1600 |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | cal dark & flat |
| Weather : | clear, temperature +3 C |
| Site : | Sweden, Stockholm, Hagsätra. Bortle class 9 |
| Comment : |
This is a new object to me, it have just come around the corner of the house. It's an open cluster of stars.
Stars are easy to take photographs of from the balcony even with high light pollution.
It doesn't looks very impressive, but click on the photo above and all details are there. |
| Date : | 2023-03-03 |
| Time (UT) : | 22:24 to 23:44 |
| Comment : |
Zooming in on the open cluster NGC 6939. That's the object up to right.
It was discovered already by William Herschel 1798.
It has a magnitude of 7.8 and can't be find without a telescope.
When looking closer there is another object at lower left, a weak spiral galaxy,
NGC 6946, magnitude 9.6. |
English
(click on the image to get one in full resolution in a new window)
