Rho Indi

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Rho 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) +6.064
Characteristics
Spectral type G2.5IV
Variable type none
Astrometry
Radial velocity (Rv) –3.0 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
Distance 87.2 ± 0.8 ly
(26.7 ± 0.3 pc)
Absolute magnitude (MV) +3.948
Details
Mass 1.07 M
Radius 1.1 R
Luminosity 1.09 L
Surface gravity (log g) 4.29 cgs
Temperature 5636 K
Metallicity 0 (100%)
Rotation ?
Age 12.96 × 109 years
Other designations
CP(D) –70°2971, FK5 865, GSC 09340-01818, HR 8701, HD 216437, HIP 113137, SAO 258084.

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. The age of the star is almost 13 Gya and it will soon die away as a planetary nebula.

Planetary system[edit]

On September 17, 2002, this star was found to have a planet, Rho Indi b.[2]

The Rho Indi system[3]
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[edit]

References[edit]

External links[edit]

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