61 Virginis c
From Wikipedia, the free encyclopedia
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
 |
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| Parent star | ||
| Star | 61 Virginis | |
| Constellation | Virgo | |
| Right ascension | (α) | 13h 18m 24.3s |
| Declination | (δ) | −18° 18′ 40.3″ |
| Apparent magnitude | (mV) | 4.74 |
| Distance | 27.8 ± 0.2 ly (8.52 ± 0.05 pc) |
|
| Spectral type | G5V | |
| Mass | (m) | 0.95+0.04 −0.03 M☉ |
| Radius | (r) | 0.940+0.034 −0.029 R☉ |
| Temperature | (T) | 5585 K |
| Metallicity | [Fe/H] | −0.02 |
| Age | 6.1–6.6 Gyr | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.2175 ± 0.0001 AU (32.54 Gm) |
| Periastron | (q) | 0.1863 AU (27.88 Gm) |
| Apastron | (Q) | 0.2487 AU (37.20 Gm) |
| Eccentricity | (e) | 0.14 ± 0.06 |
| Orbital period | (P) | 38.021 ± 0.034 d (0.10409 y) |
| Orbital speed | (υ) | 62.45 km/s |
| Argument of periastron |
(ω) | 341 ± 38° |
| Time of periastron | (T0) | 2453369.166 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 18.2 ± 1.1 M⊕ |
| Discovery information | ||
| Discovery date | 2009-12-14 | |
| Discoverer(s) | Vogt et al. | |
| Detection method | Radial velocity | |
| Discovery site | Keck Observatory Anglo-Australian Observatory |
|
| Discovery status | Confirmed[1] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
61 Virginis c (abbreviated 61 Vir c) is an extrasolar planet, orbiting the 5th magnitude G-type star 61 Virginis, in Virgo. This planet has a minimum mass of 18.2 times that of Earth and orbits one-fifth the distance to the star as Earth orbits the Sun, at a precise distance of 0.2175 AU with an eccentricity of 0.14. This planet would most likely be a gas giant like Uranus and Neptune. This planet was discovered on 14 December 2009 from using a precise radial velocity method taken at Keck and Anglo-Australian Observatories.[2][3]
References [edit]
- ^ M. C. Wyatt et al. (2012). "Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems". MNRAS. arXiv:1206.2370.
- ^ Vogt, Steven (2009). "A Super-Earth and two Neptunes Orbiting the Nearby Sun-like star 61 Virginis". arXiv:0912.2599v1 [astro-ph.EP].
- ^ Tim Stephens (2009-12-14). "New planet discoveries suggest low-mass planets are common around nearby stars". UCSC News. UC Santa Cruz. Archived from the original on 23 December 2009. Retrieved 2009-12-14.
External links [edit]
- Jean Schneider (2011). "Notes for Planet 61 Vir c". Extrasolar Planets Encyclopaedia. Retrieved 10 October 2011.
Coordinates: 
13h 18m 24.3s, −18° 18′ 40.3″
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