HD 13931 is a star located in the constellation Andromeda at a distance of about 144 light-years from us. At least one planet orbits a star.
| HD 13931 | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 144 St. years (44.2 pc ) [1] | ||
| Visible magnitude ( V ) | 7.61 ± 0.03 [1] | ||
| Constellation | Andromeda | ||
| Astrometry | |||
| Radial velocity ( R v ) | 33.7 [2] km / s | ||
| Own movement (μ) | RA: 99.03 [2] Dec: -183.19 [2] | ||
| Parallax (π) | 22.61 ± 0.66 [2] mas | ||
| Absolute magnitude (V) | 4.32 ± 0.10 [1] | ||
| Specifications | |||
| Spectral class | G0 [1] | ||
| Color Index ( B - V ) | 0.642 ± 0.015 [1] | ||
| physical characteristics | |||
| Weight | 1,022 ± 0,02 [1] M ☉ | ||
| Radius | 1.23 ± 0.06 [1] R ☉ | ||
| Age | 8.4 ± 2.0 billion [1] years | ||
| Temperature | 5829 ± 44 [1] K | ||
| Luminosity | 1.57 ± 0.14 [1] L ☉ | ||
| Metallicity | [Fe / H] = + 0.03 ± 0.04 [1] | ||
| Rotation | 2.0 ± 0.5 km / s -1 [1] | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
| Sources: [2] | |||
Content
Features
HD 13931 - a star of 7.61 visible magnitude; [1] For the first time in astronomical literature, it is mentioned in the catalog of Henry Draper , published at the beginning of the 20th century . This is a double of the Sun , i.e. in its parameters it is very reminiscent of our daylight. HD 13931 is an old star, about 8 billion years old, with weak chromospheric activity. Its surface temperature is about 5829 Kelvin .
Planet System
In 2010, a team of California astronomers announced the discovery [1] of the planet HD 13931 b with a system. This is a gas giant , very similar to Jupiter . It has a mass equal to 1.88 Jupiter, and is drawn at a distance of 5.15 AU from the parent star. The discovery of the planet was made by the Doppler method .
| Planet | Weight ( M J ) | Radius ( R J ) | Circulation period ( days ) | Semimajor axis orbits ( a.u. ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | 1.88 ± 0.15 | ? | 4218 ± 388 | 5.15 ± 0.3 | 0.02 ± 0.05 |
Notes
- ↑ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Andrew W. Howard, John Asher Johnson, Geoffrey W. Marcy, Debra A. Fischer, Jason T. Wright, David Bernat, Gregory W. Henry, Kathryn MG Peek , Howard Isaacson, Kevin Apps, Michael Endl, William D. Cochran, Jeff A. Valenti, Jay Anderson, Nikolai E. Piskunov. The California Planet Survey I. Four New Giant Exoplanets . Arxiv.org (Mar 17, 2010). Date of treatment November 3, 2011. Archived on June 20, 2012.
- ↑ 1 2 3 4 5 SIMBAD - HD 13931 in the SIMBAD database . Date of treatment November 3, 2011.
- ↑ 1 2 3 4 Gaia Data Release 2 - 2018.
See also
- List of stars of the constellation Andromeda