Tau6 Eridani
Star in the constellation Eridanus
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Tau6 Eridani, Latinized from τ6 Eridani, is a single[10] star in the equatorial constellation of Eridanus, located near the constellation border with Fornax. It has a yellow-white hue with an apparent visual magnitude of 4.22,[2] which is bright enough to be seen with the naked eye. Based upon parallax measurements, the distance to this star is around 57.5 light years.[1] It is drifting further away with a radial velocity of +8 km/s.[5]
 | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h 46m 50.88819s[1] |
| Declination | −23° 14′ 59.0046″[1] |
| Apparent magnitude (V) | 4.22[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | F5IV-V[4] |
| U−B color index | −0.03[2] |
| B−V color index | +0.43[2] |
| Astrometry | |
| Radial velocity (Rv) | 8.0±0.8[5] km/s |
| Proper motion (μ) | RA: −158.84[1] mas/yr Dec.: −528.95[1] mas/yr |
| Parallax (π) | 56.73±0.19 mas[1] |
| Distance | 57.5 ± 0.2 ly (17.63 ± 0.06 pc) |
| Absolute magnitude (MV) | 2.98[6] |
| Details[7] | |
| Mass | 1.40+0.06 −0.04 M☉ |
| Radius | 1.73±0.03 R☉ |
| Luminosity | 5.29±0.27 L☉ |
| Surface gravity (log g) | 4.141±0.090 cgs |
| Temperature | 6,651+64 −54 K |
| Metallicity [Fe/H] | −0.03±0.11[5] dex |
| Rotational velocity (v sin i) | 16.25[8] km/s |
| Age | 2.17+0.38 −0.48 Gyr |
| Other designations | |
| τ6 Eri, 27 Eridani, CD−23°1565, FK5 140, GC 168827, GJ 155, HD 23754, HIP 17651, HR 1173, SAO 101600[9] | |
| Database references | |
| SIMBAD | data |
The spectrum of Tau6 Eridani matches a stellar classification of F5IV-V,[4] indicating it is an F-type star that shows traits of both a main sequence star and a subgiant. It has an estimated 140% of the Sun's mass and 1.73 times the radius of the Sun. The star is radiating 5.29 times the luminosity of the Sun at an effective temperature of 6,651 K,[7] and it does not display any surface magnetic activity.[8] The star has been examined for infrared excess emission that could indicate the presence of circumstellar matter, but none has been detected.[11]