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Star in the constellation Phoenix From Wikipedia, the free encyclopedia
Delta Phoenicis, Latinized from δ Phoenicis, is a single,[9] yellow-hued star in the southern constellation of Phoenix. With an apparent visual magnitude of 3.93,[2] it is visible to the naked eye. Based upon an annual parallax shift of 22.95 mas as seen from Earth,[1] it is located 142 light years from the Sun. The star is moving closer to the Sun with a radial velocity of −7 km/s.[4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Phoenix |
Right ascension | 01h 31m 15.10475s[1] |
Declination | −49° 04′ 21.7308″[1] |
Apparent magnitude (V) | 3.93[2] |
Characteristics | |
Spectral type | G8.5 IIIb[2] |
U−B color index | +0.70[3] |
B−V color index | +0.99[3] |
Astrometry | |
Radial velocity (Rv) | −7.3±0.7[4] km/s |
Proper motion (μ) | RA: +138.38[1] mas/yr Dec.: +153.89[1] mas/yr |
Parallax (π) | 22.95 ± 0.19 mas[1] |
Distance | 142 ± 1 ly (43.6 ± 0.4 pc) |
Absolute magnitude (MV) | 0.73[2] |
Details | |
Mass | 1.46[5] M☉ |
Radius | 10.5[6] R☉ |
Luminosity | 60.14[2] L☉ |
Surface gravity (log g) | 2.61[7] cgs |
Temperature | 4,762±26[5] K |
Metallicity [Fe/H] | -0.28[7] dex |
Rotational velocity (v sin i) | < 1.0[8] km/s |
Age | 3.69[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is a G-type giant star with a stellar classification of G8.5 IIIb.[2] It is a red clump star, which means it has reached the stage of its evolution where it is generating energy through helium fusion at its core.[7] The measured angular diameter of this star, after correction for limb darkening, is 2.24±0.02 mas.[10] At its estimated distance, this yields a physical size of about 10.5 times the radius of the Sun.[6] It is around 3.7[5] billion years old with 1.46[5] times the mass of the Sun. The star is radiating 60[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,762 K.[5]
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