| 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 ly (15.51 pc) |
|
| Spectral type | G3IV–V | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.497[1] AU |
| Eccentricity | (e) | 0.128[1] |
| Orbital period | (P) | 643.25 ± 0.90[1] d (1.76 y) |
| Argument of periastron |
(ω) | 22.0 ± 7.0[1]° |
| Time of periastron | (T0) | 2452365.6 ± 12.6[1] JD |
| Semi-amplitude | (K) | 37.78 ± 0.40 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 1.676[1] MJ (532.6 M⊕) |
| Discovery information | ||
| Discovery date | December 12, 2000 | |
| Discoverer(s) | Butler, Marcy | |
| Detection method | Doppler Spectroscopy | |
| Discovery site | California,  USA |
|
| Discovery status | Published | |
| Other designations | ||
|
HD 160691 b
|
||
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
Mu Arae b (also referred to as HD 160691 b) is an extrasolar planet orbiting the star Mu Arae. At least one and a half times the mass of Jupiter. Its orbital period is 643.25 days. This planet's discovery was announced on December 12, 2002 and was originally thought to be on a highly eccentric orbit.[2] The latest models of the system which incorporate four planets give a lower eccentricity orbit.[1] While the planet itself is likely to be a gas giant with no solid surface, the orbital distance of 1.497 astronomical units from the star puts it within the liquid water habitable zone of the system. As a result, large satellites of the planet, if they exist, could potentially support life. However it may not receive enough ultraviolet light for abiogenesis to proceed.[3] Furthermore it is not clear that Earth-size moons can actually form in the environment around a gas giant planet.[4]
References
- ^ a b c d e f g Pepe, F.; Correia, A. C. M.; Mayor, M.; Tamuz, O.; Couetdic, J.; Benz, W.; Bertaux, J.-L.; Bouchy, F.; Laskar, J.; Lovis, C.; Naef, D.; Queloz, D.; Santos, N. C.; Sivan, J.-P.; Sosnowska, D.; Udry, S. (2007). "The HARPS search for southern extra-solar planets. VIII. μ Arae, a system with four planets". Astronomy and Astrophysics 462 (2): 769 – 776. doi:. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007A%26A...462..769P&db_key=AST&nosetcookie=1.
- ^ Butler, R. Paul; Tinney, C. G.; Marcy, Geoffrey W.; Jones, Hugh R. A.; Penny, Alan J.; Apps, Kevin (2001). "Two New Planets from the Anglo-Australian Planet Search". The Astrophysical Journal 555 (1): 410 – 417. doi:. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2001ApJ...555..410B&db_key=AST&nosetcookie=1.
- ^ Buccino, Andrea P.; Lemarchand, Guillermo A.; Mauas, Pablo J. D. (2006). "Ultraviolet Radiation Constraints around the Circumstellar Habitable Zones". Icarus 183 (2): 491 – 503. doi:. http://adsabs.harvard.edu/abs/2005astro.ph.12291B.
- ^ Canup, R., Ward, W. (2006). "A common mass scaling for satellite systems of gaseous planets". Nature 441: 834 – 839. doi:. http://www.nature.com/nature/journal/v441/n7095/abs/nature04860.html.
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Coordinates: 
17h 44m 08.7s, −51° 50′ 03″
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