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Star in the constellation Pisces From Wikipedia, the free encyclopedia
HD 6 is a star in the equatorial constellation of Pisces, and is located a couple of degrees southeast of the intersection between the ecliptic and the celestial equator. It is a yellow-hued star that is just barely visible to the naked eye with an apparent visual magnitude of 6.3.[2] The star is located at a distance of 471 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of 15.3 km/s.[6] It has an absolute magnitude of 0.62.[7]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 00h 05m 03.82339s[1] |
Declination | −00° 30′ 10.9306″[1] |
Apparent magnitude (V) | 6.30±0.01[2] |
Characteristics | |
Evolutionary stage | horizontal branch[3] |
Spectral type | K0 III[4] |
U−B color index | +1.03[5] |
B−V color index | +1.11[5] |
Astrometry | |
Radial velocity (Rv) | 15.3±0.7[6] km/s |
Proper motion (μ) | RA: +45.245 mas/yr[1] Dec.: −53.594 mas/yr[1] |
Parallax (π) | 6.9277 ± 0.0368 mas[1] |
Distance | 471 ± 3 ly (144.3 ± 0.8 pc) |
Absolute magnitude (MV) | 0.62[7] |
Details | |
Mass | 1.95[8] M☉ |
Radius | 12.4[9] R☉ |
Luminosity | 72.4[10] L☉ |
Surface gravity (log g) | 1.8[3] cgs |
Temperature | 4,807±75[9] K |
Metallicity [Fe/H] | −0.03[3] dex |
Rotational velocity (v sin i) | 2.8±0.8[11] km/s |
Age | 1.62[8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
An evolved red giant with a stellar classification K0 III,[4] the star has moved off the main sequence by cooling and expanding. At the age of 1.6 billion years,[8] is now a red clump giant on the horizontal branch that is engaged in core helium fusion.[3] It has nearly double the mass of the Sun[8] and has expanded to 12.4[9] times the Sun's radius. The star is radiating 72 times the luminosity of the Sun[10] from its photosphere at an effective temperature of 4,807 K.[9]
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