4 Ursae Majoris b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | 4 Ursae Majoris | |
| Constellation | Ursa Major | |
| Right ascension | (α) | 08h 40m 12.818s[1] |
| Declination | (δ) | +64° 19′ 40.57″[1] |
| Distance | 256 ± 5[1] ly (78 ± 2[1] pc) | |
| Spectral type | K1+IIIb | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.87 ± 0.04 AU |
| Eccentricity | (e) | 0.432 ± 0.024 |
| Orbital period | (P) | 269.3 ± 1.96 d |
| Argument of periastron |
(ω) | 23.81 ± 4.42° |
| Time of periastron | (T0) | 2,452,987.3936 ± 4.31 JD |
| Semi-amplitude | (K) | 215.6 ± 7.1 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 7.1 ± 1.6 MJ |
| Discovery information | ||
| Discovery date | 28 March 2007 | |
| Discoverer(s) | Doellinger et al. | |
| Discovery method | Doppler Spectroscopy | |
| Discovery status | Published | |
4 Ursae Majoris b (sometimes abbreviated 4 Uma b) is an extrasolar planet orbiting the star 4 Ursae Majoris, approximately 252 light-years away in the constellation of Ursa Major. This planet has a minimum mass over 7 times that of Jupiter and orbits at 0.87 AU from the star in an eccentric path.[2]
References
- 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- ↑ Döllinger, M. P.; et al. (2007). "Discovery of a planet around the K giant star 4 Ursae Majoris". Astronomy and Astrophysics. 472 (2): 649–652. arXiv:astro-ph/0703672. Bibcode:2007A&A...472..649D. doi:10.1051/0004-6361:20066987.
External links
- Jean Schneider (2011). "Notes for planet 4 Uma b". Extrasolar Planets Encyclopaedia. Retrieved 3 October 2011.
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