HD 152581 - A star located in the constellation Ophiuchus at a distance of about 607 light years from us. At least one planet orbits a star.
| HD 152581 | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 607 St. years (186 pc ) [1] | ||
| Visible magnitude ( V ) | 8.54 [1] | ||
| Constellation | Ophiuchus | ||
| Astrometry | |||
| Radial velocity ( R v ) | |||
| Own movement (μ) | RA: 11.49 [3] Dec: -15.79 [3] | ||
| Parallax (π) | 5.39 ± 0.96 [3] mas | ||
| Absolute magnitude (V) | 2.2 [1] | ||
| Characteristics | |||
| Spectral class | K0IV [1] | ||
| Color Index ( B - V ) | 0.90 [1] | ||
| physical characteristics | |||
| Weight | 0.927 [1] M ☉ | ||
| Radius | 4.8 [1] R ☉ | ||
| Age | 12 billion [1] years | ||
| Temperature | 5155 [1] K | ||
| Luminosity | 14.9 [1] L ☉ | ||
| Metallicity | [Fe / H] = - 0.46 [1] | ||
| Rotation | 0.50 km / s -1 [1] | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
| Sources: [3] | |||
Content
- 1 Features
- 2 Planetary system
- 3 notes
- 4 See also
- 5 Links
Features
HD 152581 - 8.54 magnitude star for the first time in astronomical literature is mentioned in the catalog of Henry Draper , published at the beginning of the XX century . This is a very old orange subgiant , about 12 billion years old. [1] The mass and radius of the star are equivalent to 0.927 and 4.8 solar, respectively. The surface temperature is approximately 5155 Kelvin . In luminosity, a star surpasses our Sun by almost 15 times.
Planet System
In 2011, a group of astronomers working with data obtained at the Keck Observatory announced the discovery [1] of the planet HD 152581 b in the system. It is a gas giant , with a mass equal to 1.5 the mass of Jupiter . The planet is drawn at a distance of 1.48 AU from the parent star, making a complete revolution around it in 689 days. The discovery of the planet was performed by the Doppler method .
| Planet | Weight ( M J ) | Radius ( R J ) | Circulation period ( days ) | Semimajor axis orbits ( a.u. ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | 1.5 ± 0.1 | ? | 689 ± 13 | 1.48 ± 0.04 | 0.11 ± 0.11 |
Notes
- ↑ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 John Asher Johnson, Christian Clanton, Andrew W. Howard, Brendan P. Bowler, Gregory W. Henry, Geoffrey W. Marcy, Justin R. Crepp, Michael Endl, William D. Cochran, Phillip J. MacQueen, Jason T. Wright, Howard Isaacson. Retired A Stars and Their Companions: Eighteen New Jovian Planets . Arxiv.org (Aug 21, 2011). Date of treatment October 22, 2011. Archived on August 29, 2012.
- ↑ 1 2 3 4 5 6 Collaboration G. Gaia DR2 - 2018 .-- Vol. 1345.
- ↑ 1 2 3 4 SIMBAD - HD 152581 in the SIMBAD database . Date of treatment October 22, 2011.
See also
- Ophiuchus constellation star list