Omega Snakes ( lat.Omega Serpentis ) is a star located in the constellation Snake at a distance of about 262 light years from us. At least one planet orbits a star.
| ω Snakes | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 262 St. years (80 pc ) [1] | ||
| Visible magnitude ( V ) | 5.21 [1] | ||
| Constellation | Snake | ||
| Astrometry | |||
| Radial velocity ( R v ) | -3.61 [2] km / s | ||
| Own movement (μ) | RA: 29.15 [2] Dec: -47.31 [2] | ||
| Parallax (π) | 11.93 ± 0.28 [2] mas | ||
| Absolute magnitude (V) | +0.49 [1] | ||
| Characteristics | |||
| Spectral class | G8III [2] | ||
| Color Index ( B - V ) | 1.019 [1] | ||
| physical characteristics | |||
| Weight | 2.17 [1] M ☉ | ||
| Radius | 12.30 [1] R ☉ | ||
| Temperature | 4770 ± 10 [1] K | ||
| Luminosity | 70.8 [1] L ☉ | ||
| Metallicity | [Fe / H] = - 0.24 ± 0.02 [1] | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
| Sources: [2] | |||
Content
- 1 Features
- 2 Planetary system
- 3 notes
- 4 See also
- 5 Links
Features
ω Snake is a yellow giant 5.21 visible magnitude; it can be observed with the naked eye . For the first time in astronomical literature, it is mentioned in the atlas of Uranometry , published by Johann Bayer in 1603 . The mass of the star is equal to 2.17 masses of the Sun , and in size it exceeds 12 times more than our daylight. [1] The surface temperature of the star is about 4770 Kelvin . The luminosity ω of the Snake exceeds solar by 70.8 times.
Planet System
In 2013, the Japanese group of astronomers working with the HIDES spectrograph announced [1] the discovery of the planet ω Snakes b in the system. It is a gas giant , surpassing 1.7 times the mass of Jupiter . The orbit of the planet is located at a distance of 1.1 AU from the parent star. A year on it lasts about 277 days. The discovery was made by Doppler spectroscopy .
| Planet | Weight ( M J ) | Radius ( R J ) | Circulation period ( days ) | Semimajor axis orbits ( a.u. ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | 1.7 | - | 277.02 ± 0.52 | 1,1 | 0.106 |
Notes
- ↑ 1 2 3 4 5 6 7 8 9 10 11 Bun'ei Sato, Masashi Omiya, Hiroki Harakawa, Yu-Juan Liu, Hideyuki Izumiura, Eiji Kambe, Yoichi Takeda, Michitoshi Yoshida, Yoichi Itoh, Hiroyasu Ando, Eiichiro Kokubo, Shiger Ida. Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis . Arxiv.org (17 Apr 2013). Date of treatment July 23, 2013.
- ↑ 1 2 3 4 5 6 SIMBAD (English) . - ω Snakes in the SIMBAD database . Date of treatment July 23, 2013.
- ↑ 1 2 3 4 Collaboration G. Gaia DR2 - 2018 .-- T. 1345. - P. 0.
See also
- Snake constellation star list