| Object : | Grumium, binary double star, another name: Xi Draconis |
| Coordinates/Direction : | RA: 17h53m, DEC: +56o52' |
| Object size : | Double star separation 316" |
| Object magnitude : | Primary 3.75, Secondary 16 |
| More to know : |
Double Star, Wikipedia:
https://en.wikipedia.org/ wiki/ Double star
Grumium:
https://en.wikipedia.org/ wiki/ Xi Draconis
|
| Date : | 2023-03-15 |
| Time (UT) : | 21:53 to 22:42 |
| 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 +7 C. Controlled by
KStars Ekos/Indi |
| Film/CCD : | Raw |
| Exp. time : | 60x30 seconds, iso1600 |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat calibration, no darks, synthetic bias, photometric color calibration |
| Weather : | clear sky, temperature 0 C |
| Site : | Sweden, Stockholm, Hagsätra. Bortle class 9 |
| Comment : |
A third double star this night. This also belong to the constellation Draco.
See the full resolution image and zoom in.
Can you recognize any object ?
|
| Date : | 2023-03-15 |
| Time (UT) : | 21:53 to 22:42 |
| Site : | Sweden, Stockholm, Hagsätra. Bortle class 9 |
| Comment : |
Crop around the binary star, but they are too close and this long exposure saturated them to one big blob. |
| Date : | 2023-03-15 |
| Time (UT) : | 21:53 to 22:42 |
| Site : | Sweden, Stockholm, Hagsätra. Bortle class 9 |
| Comment : |
Near the middle of the full field image is this object,
IC 1286.
It's a spiral galaxy of magnitude 14.8, barely seen in this photo.
There are many more objects in the full field image, look at this plate solved image by Astrometry:
Grumium plate solved.
It opens in a new window. |
English
(Click on the image to get one in full resolution in a new window)
