Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Indus |
Right ascension | 20h 49m 28.96165s[1] |
Declination | −46° 13′ 36.6083″[1] |
Apparent magnitude (V) | 4.90[2] |
Characteristics | |
Evolutionary stage | giant |
Spectral type | K5III[3] |
B−V color index | +1.494±0.059[2] |
Astrometry | |
Radial velocity (Rv) | −5.20±2.8[4][2] km/s |
Proper motion (μ) | RA: +40.050[1] mas/yr Dec.: +28.199[1] mas/yr |
Parallax (π) | 7.5666 ± 0.2153 mas[1] |
Distance | 430 ± 10 ly (132 ± 4 pc) |
Absolute magnitude (MV) | −0.61[2] |
Details | |
Radius | 44.79+0.86 −5.47[1] R☉ |
Luminosity | 446±14[1] L☉ |
Surface gravity (log g) | 1.93[5] cgs |
Temperature | 3,963+267 −37[1] K |
Other designations | |
Database references | |
SIMBAD | data |
Zeta Indi is a single[7] star in the southern constellation Indus, near the northern constellation border with Microscopium. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.90.[2] The star is located approximately 430 light years away from the Sun based on parallax.[1] The radial velocity estimate for this object is poorly constrained, but it appears to be moving closer at the rate of around −5 km/s.[2]
This object is an aging giant star with a stellar classification of K5III.[3] With the supply of hydrogen at its core exhausted, the star has expanded off the main sequence and now has 45[1] times the girth of the Sun. It is radiating 446[1] times the luminosity of the Sun from its bloated photosphere at an effective temperature of 3,963 K.[1]
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