Rho Indi

ρ Indi
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Indus
Right ascension 22h 54m 39.482s[1]
Declination –70° 04′ 25.35″[1]
Apparent magnitude (V) +6.05[2]
Characteristics
Spectral type G2.5IV
U−B color index +0.22[3]
B−V color index +0.66[3]
Astrometry
Radial velocity (Rv)−4.00 ± 0.92[4] km/s
Proper motion (μ) RA: -43.89 ± 0.26[1] mas/yr
Dec.: 73.04 ± 0.24[1] mas/yr
Parallax (π)37.39 ± 0.36[1] mas
Distance87.2 ± 0.8 ly
(26.7 ± 0.3 pc)
Absolute magnitude (MV)+3.948
Details[4]
Mass1.317 ± 0.083 M☉
Radius1.456 ± 0.024 R☉
Luminosity2.24 L☉
Surface gravity (log g)4.23 cgs
Temperature5849 K
Metallicity [Fe/H]0.18 dex
Rotational velocity (v sin i)3.1 km/s
Age4.6 (4.2 - 5.6) Gyr
Other designations
CPD–70° 2971, FK5 865, HR 8701, HD 216437, HIP 113137, SAO 258084.
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

ρ Indi, Latinised as Rho Indi, (Bright Star designation HR 8701) is a yellow subgiant star in the constellation Indus. It is, barely, a naked eye star, not visible in the northern hemisphere outside the tropics.

Planetary system

On September 17, 2002, this star was found to have a planet, Rho Indi b.[5]

The Rho Indi planetary system[6]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >2.26 ± 0.19 MJ 2.54 ± 0.15 1353 ± 25 0.319 ± 0.025 — —

See also

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357.Vizier catalog entry
  2. ↑ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
  4. 1 2 Valenti, Jeff A.; Fischer, Debra A. (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: 141. Bibcode:2005ApJS..159..141V. doi:10.1086/430500.
  5. ↑ Jones, Hugh R. A.; et al. (2002). "Extrasolar planets around HD 196050, HD 216437 and HD 160691". Monthly Notices of the Royal Astronomical Society. 337 (4): 1170–1178. Bibcode:2002MNRAS.337.1170J. arXiv:astro-ph/0206216 Freely accessible. doi:10.1046/j.1365-8711.2002.05787.x.
  6. ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493 Freely accessible. doi:10.1086/504701.

Coordinates: 22h 54m 39.4833s, −70° 04′ 25.352″

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