NGC 7822 is a young star forming complex in the constellation of Cepheus. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800–1000 pc distant,[5][6] with the younger components aged no more than a few million years.[5][6] The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, namely BD+66 1673, which is an eclipsing binary system consisting of an O5V that exhibits a surface temperature of nearly 45,000 K and a luminosity about 100,000 times that of the Sun.[5] The star is one of the primary sources illuminating the nebula and shaping the complex’s famed pillars of creation-type formations, the elephant trunks.[5][7][8]
Techincal card of image
Imaging telescopes or lenses: William Optics 81GT IV
Imaging cameras: ZWO ASI 6200 MM Pro
Mounts: Celestron Advanced VX Goto GEM Celestron AVX
Guiding telescopes or lenses: Skywatcher Evoguide 50mm Skywatcher
Guiding cameras: ZWO ASI122mc ZWO
Software: Adobe Photoshop 2021 · PixInsight 1.8 Ripley PinInsight 1.8.8
Filters: ZWO SII 7nm 2″ · ZWO OIII 7nm 2″ · ZWO H-alpha 7nm 2″
Dates:July 19, 2021
Frames:
ZWO H-alpha 7nm 2″: 6×250″ (25′) (gain: 0.00) -15C bin 1×1
ZWO OIII 7nm 2″: 6×250″ (25′) (gain: 0.00) -16C bin 1×1
ZWO SII 7nm 2″: 6×250″ (25′) (gain: 0.00) -15C bin 1×1
Intergration: 1h 15`
Darks: 6
Flats: 20
Bias: 100
Avg. Moon age: 9.63 days
Avg. Moon phase: 72.99%
Bortle Dark-Sky Scale: 5.00
RA center: 00h05m05s.81
DEC center: +67°03′36″.0
Pixel scale: 2.015 arcsec/pixel
Orientation: -105.265 degrees
Field radius: 0.804 degrees
| Observation data: J2000 epoch | |
|---|---|
| Right ascension | 00h 01m 08.58s[1] |
| Declination | +67° 25′ 17.0″[1] |
| Distance | 2900 ly (900[1] pc) |
| Apparent diameter | 100′[2] |
| Constellation | Cepheus |
| Physical characteristics | |
| Radius | 75[3] ly (23 pc) |
| Designations | LBN 589, Sh 2-171[4] |
More info: Open
Skymap and Histogram of image
