Mu Arae d
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | Mu Arae | |
| Constellation | Ara | |
| Right ascension | (α) | 17h 44m 08.7s |
| Declination | (δ) | −51° 50′ 03″ |
| Apparent magnitude | (mV) | 5.15 |
| Distance | 50.6 ± 0.2 ly (15.51 ± 0.07 pc) | |
| Spectral type | G3IV–V | |
| Mass | (m) | 1.10 ± 0.01 M☉ |
| Radius | (r) | 1.36 ± 0.01 R☉ |
| Temperature | (T) | 5820 ± 40 K |
| Metallicity | [Fe/H] | 0.30 ± 0.01 |
| Age | 6.34 ± 0.40 Gyr | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.9210[1] AU (137.78 Gm) |
| Periastron | (q) | 0.8597 AU (128.61 Gm) |
| Apastron | (Q) | 0.9823 AU (146.96 Gm) |
| Eccentricity | (e) | 0.0666 ± 0.0122[1] |
| Orbital period | (P) | 310.55 ± 0.83[1] d (0.8502 y) |
| Argument of periastron |
(ω) | 189.6 ± 9.4[1]° |
| Time of periastron | (T0) | 2452708.7 ± 8.3[1] JD |
| Semi-amplitude | (K) | 14.91 ± 0.59[1] m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.5219[1] MJ (165.9[1] M⊕) |
| Discovery information | ||
| Discovery date | August 5, 2006 | |
| Discoverer(s) | Goździewski et al. Mayor, Pepe | |
| Discovery method | Doppler Spectroscopy | |
| Discovery site |  Chile, South America | |
| Discovery status | Published | |
| Other designations | ||
| HD 160691 d | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
Mu Arae d (also known as HD 160691 d) is an extrasolar planet orbiting the star Mu Arae. The planet has a mass about half that of Jupiter and orbits at a distance of 0.921 AU from the star with a period of 310.55 days. The planet may be located at a distance close enough to the star to receive a comparable amount of ultraviolet radiation as the Earth does from the Sun, however it is too close to the star to be able to support liquid water at its surface.[2] Furthermore, given its mass, the planet is likely to be a gas giant with no solid surface.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Pepe, F.; Correia, A. C. M.; Mayor, M.; Tamuz, O. et al. (2007). "The HARPS search for southern extra-solar planets. VIII. μ Arae, a system with four planets". Astronomy and Astrophysics 462 (2): 769–776. arXiv:astro-ph/0608396. Bibcode:2007A&A...462..769P. doi:10.1051/0004-6361:20066194.
- ↑ Buccino, A. et al. (2006). "Ultraviolet Radiation Constraints around the Circumstellar Habitable Zones". Icarus 183 (2): 491–503. arXiv:astro-ph/0512291. Bibcode:2005astro.ph.12291B. doi:10.1016/j.icarus.2006.03.007.
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Coordinates: 
17h 44m 08.7s, −51° 50′ 03″
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