HIP 57050 ( Ross 1003 ) is a star that is in the constellation Ursa Major at a distance of about 35.8 light years from us. At least one planet is drawn around the star.
| HIP 57050 | |||
|---|---|---|---|
| Star | |||
 HIP 57050 in the view of the artist. | |||
| Observational data ( Epoch J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 35.8 over . years (11 pc ) [1] | ||
| Visible magnitude ( V ) | 11.88 [1] | ||
| Constellation | Big Dipper | ||
| Astrometry | |||
| Radial velocity ( R v ) | -25.6 [2] km / s | ||
| Proper motion (μ) | RA: -579.67 [2] mas per year Dec: -89.55 [2] mas per year | ||
| Parallax (π) | 90.66 ± 3.03 [2] mas | ||
| Specifications | |||
| Spectral class | M4VD [1] | ||
| Color Indicator ( B - V ) | 1.60 [1] | ||
| physical characteristics | |||
| Weight | 0.34 ± 0.03 [1] M ☉ | ||
| Radius | 0.4 [1] R ☉ | ||
| Temperature | 3190 [1] K | ||
| Luminosity | 0,01486 [1] L ☉ | ||
| |||
| Information in databases | |||
| SIMBAD | data | ||
| Sources: [2] | |||
Content
Characteristics
HIP 57050 is one of the red dwarfs nearest to the Sun; it has a mass and diameter of 0.34 and 0.4 solar, respectively. [1] The surface temperature of the star is 3190 Kelvin .
Planetary system
In 2010, a group of astronomers announced the discovery of the planet HIP 57050 b in this system [1] . It is a gas giant , comparable in mass to Saturn . It is located in the habitable zone , i.e. at such a distance from the parent star, where conditions favor the birth and development of life, similar to conditions on Earth . Year on the planet lasts 41 days.
| Planet | Weight ( M J ) | Radius ( R j ) | Period of treatment ( days ) | Big axis orbits ( a. e ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | 0,298 ± 0,025 | ? | 41.397 ± 0.016 | 0.163506 | 0.314 ± 0.086 |
Notes
- ↑ 1 2 3 4 5 6 7 8 9 10 Nader Haghighipour, Steven S. Vogt, R. Paul Butler, Eugenio J. Rivera, Greg Laughlin, Stefano Meschiari, Gregory W. Henry. The Lick-Carnegie Exoplanet Survey: A Survival-Mass Planet Star HIP 57050 (Eng.) . Arxiv.org (Apr 26 2010). The appeal date is May 4, 2010.
- ↑ 1 2 3 4 5 SIMBAD (English) . - HIP 57050 in SIMBAD database . The appeal date is May 2, 2010.
See also
- List of stars of the constellation Ursa Major