HD 102117
HD 102117
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
Constellation | Centaurus |
Right ascension | 11h 44m 50.461s[1] |
Declination | –58° 42′ 13.36″[1] |
Apparent magnitude (V) | 7.47[2] |
| Characteristics | |
Spectral type | G6V[2] |
| Astrometry | |
| Radial velocity (Rv) | 48.9 ± 0.2 km/s |
| Proper motion (μ) | RA: –63.74 ± 0.55[1] mas/yr Dec.: –70.76 ± 0.48[1] mas/yr |
| Parallax (π) | 25.19 ± 0.61[1] mas |
| Distance | 129 ± 3 ly (39.7 ± 1.0 pc) |
| Details | |
| Mass | 1.37 ± 0.130[3] M☉ |
| Radius | 1.27[4] R☉ |
| Luminosity | 1.54[4] L☉ |
| Surface gravity (log g) | 4.37 ±0.06[4] cgs |
| Temperature | 5,695 ± 44[3] K |
Metallicity [Fe/H] | 0.18 ±0.05 dex |
| Rotational velocity (v sin i) | 0.88 ± 0.5[4] km/s |
| Age | 5.3 ± 3.4[3] Gyr |
| Other designations | |
CD–58°4207, HIP 57291, SAO 239348 | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
HD 102117 is a magnitude 7 yellow dwarf star (spectral type G6V) about 130 light years from Earth in the constellation of Centaurus. Although it is cooler than our Sun it is brighter and thus more evolved. This star is too dim to be seen without binoculars or a small telescope.[2]
Contents
1 Planetary system
2 See also
3 References
4 External links
Planetary system[edit]
In 2004, the Anglo-Australian Planet Search announced a planet orbiting the star.[5] A short time later the HARPS team also announced the presence of a planet around this star. Both groups detected this planet with the radial velocity method.[6]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
b | 0.172 ± 0.020 MJ | 0.1532 ± 0.0088 | 20.8133 ± 0.0064 | 0.121 ±0.082 | — | — |
See also[edit]
- List of extrasolar planets
- HARPS spectrograph
- Anglo-Australian Planet Search
References[edit]
^ abcde 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..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
Vizier catalog entry
^ abc "SIMBAD query result: HIP 57291 -- Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-23.
^ abc Valenti, Jeff A.; Fischer, Debra A. (July 2005), "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs", The Astrophysical Journal Supplement Series, 159 (1): 141–166, Bibcode:2005ApJS..159..141V, doi:10.1086/430500
^ abcd "SPOCS I", Exoplanets, Yale University, retrieved 2012-01-31
^ Tinney, C. G.; et al. (2005). "Three Low-Mass Planets from the Anglo-Australian Planet Search". The Astrophysical Journal. 623 (2): 1171–1179. Bibcode:2005ApJ...623.1171T. CiteSeerX 10.1.1.491.2941. doi:10.1086/428661.
^ Lovis, C.; et al. (2005). "The HARPS search for southern extra-solar planets III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117". Astronomy and Astrophysics. 437 (3): 1121–1126. arXiv:astro-ph/0503660. Bibcode:2005A&A...437.1121L. doi:10.1051/0004-6361:20052864.
^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links[edit]
"HD 102117". Exoplanets. Retrieved 2009-05-23.
Coordinates: 
11h 44m 50.4616s, −58° 42′ 13.354″
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
Categories:
- G-type main-sequence stars
- Henry Draper Catalogue objects
- Hipparcos objects
- Centaurus (constellation)
- Planetary systems
- Durchmusterung objects
- Main-sequence-star stubs
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