61 Virginis d
| Exoplanet | List of exoplanets | |
|---|---|---|
| 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 | ||
| Semi-major axis | (a) | 0.476±0.001 AU (71.2 Gm) |
| Periastron | (q) | 0.311 AU (46.6 Gm) |
| Apastron | (Q) | 0.640 AU (95.8 Gm) |
| Eccentricity | (e) | 0.35±0.09 |
| Orbital period | (P) | 123.01±0.55 d (0.33678 y) |
| Orbital speed | (υ) | 42.2 km/s |
| Argument of periastron |
(ω) | 314±20° |
| Time of periastron | (T0) | 2453369.166 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 22.9±2.6 M⊕ |
| Discovery information | ||
| Discovery date | 2009-12-14 | |
| Discoverer(s) | Vogt et al. | |
| Discovery method | Radial velocity | |
| Discovery site | Keck Observatory Anglo-Australian Observatory | |
| Discovery status | Unconfirmed[1] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
61 Virginis d (abbreviated 61 Vir d) is a proposed exoplanet orbiting the 5th apparent-magnitude G-type main-sequence star 61 Virginis in the constellation Virgo. 61 Virginis d would have a minimum mass of 22.9 times that of Earth and orbits nearly one-half the distance to the star as Earth orbits the Sun with an eccentricity of 0.35. This planet would most likely be a gas giant like Uranus and Neptune.
This planet was induced on 14 December 2009 from using a precise radial velocity method taken at Keck and Anglo-Australian Observatories.[2][3] As of 2012 it has not been confirmed by other measurements such as from HARPS.[1]
-
61VirginisSystem
References
- 1 2 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. Bibcode:2012MNRAS.424.1206W. doi:10.1111/j.1365-2966.2012.21298.x.
- ↑ 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
- Jean Schneider (2011). "Notes for Planet 61 Vir d". Extrasolar Planets Encyclopaedia. Retrieved 10 October 2011.
Coordinates: 
13h 18m 24.3s, −18° 18′ 40.3″
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