HD 142245 is a star located in the constellation Snake at a distance of about 355 light years from us. At least one planet orbits a star.
| HD 142245 | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 355 St. years (109 pc ) [1] | ||
| Visible magnitude ( V ) | 7.63 [1] | ||
| Constellation | Snake | ||
| Astrometry | |||
| Radial velocity ( R v ) | 6.09 [2] km / s | ||
| Own movement (μ) | RA: -55.58 [2] Dec: -20.82 [2] | ||
| Parallax (π) | 9.13 ± 0.62 [2] mas | ||
| Absolute magnitude (V) | 2.4 [1] | ||
| Characteristics | |||
| Spectral class | K0IV [1] | ||
| Color Index ( B - V ) | 1.04 [1] | ||
| physical characteristics | |||
| Weight | 1.69 [1] M ☉ | ||
| Radius | 5.2 [1] R ☉ | ||
| Age | 2.3 billion [1] years | ||
| Temperature | 4878 [1] K | ||
| Luminosity | 13.5 [1] L ☉ | ||
| Metallicity | [Fe / H] = + 0.23 [1] | ||
| Rotation | 2.66 km / s -1 [1] | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
| Sources: [2] | |||
Content
- 1 Features
- 2 Planetary system
- 3 notes
- 4 See also
- 5 Links
Features
HD 142245 - 7.63 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 . It represents an orange subgiant with a mass and radius of 1.69 and 5.2 solar, respectively. [1] The surface temperature of the star is about 4878 Kelvin . In luminosity, it exceeds our Sun by 13.5 times. HD 142245 is estimated at 2.3 billion years old.
Planet System
In 2011, a group of astronomers working with data obtained at the Keck Observatory announced the discovery [1] of the planet HD 142245 b in the system. This is a gas giant having a mass equal to 1.9 masses of Jupiter . The planet is drawn at a distance of 2.77 AU from the parent star. The discovery of HD 142245 b was accomplished by the Doppler method .
| Planet | Weight ( M J ) | Radius ( R J ) | Circulation period ( days ) | Semimajor axis orbits ( a.u. ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | 1.9 ± 0.2 | ? | 1299 ± 48 | 2.77 ± 0.09 | 0.16 ± 0.16 |
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 15, 2011. Archived on August 29, 2012.
- ↑ 1 2 3 4 5 SIMBAD - HD 142245 in the SIMBAD database . Date of treatment October 15, 2011.
- ↑ 1 2 3 4 Gaia Data Release 2 - 2018.
See also
- Snake constellation star list