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Star in the constellation Caelum From Wikipedia, the free encyclopedia
Delta Caeli (δ Caeli) is a solitary,[10] blue-white hued star in the southern constellation of Caelum. It is a dim star but visible to the naked eye, having an apparent visual magnitude of +5.06.[2] Based upon an annual parallax shift of 4.63 mas as seen from Earth,[1] this star is located roughly 700 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.13 due to interstellar dust.[5]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Caelum |
Right ascension | 04h 30m 50.09903s[1] |
Declination | −44° 57′ 13.5035″[1] |
Apparent magnitude (V) | +5.06[2] |
Characteristics | |
Spectral type | B2 IV-V[3] |
U−B color index | −0.78[2] |
B−V color index | −0.20[2] |
Astrometry | |
Radial velocity (Rv) | 14.2±0.8[4] km/s |
Proper motion (μ) | RA: +1.64[1] mas/yr Dec.: −3.09[1] mas/yr |
Parallax (π) | 4.63 ± 0.19 mas[1] |
Distance | 700 ± 30 ly (216 ± 9 pc) |
Absolute magnitude (MV) | −1.35[5] |
Details | |
Mass | 7.65±0.48[6] M☉ |
Radius | 3.9[7] R☉ |
Luminosity (bolometric) | 2,578[6] L☉ |
Temperature | 21,150[6] K |
Age | 9.4±0.6[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is a B-type star with a stellar classification of B2 IV-V,[3] where the luminosity class IV-V indicates the spectrum shows mixed traits of a subgiant star and a main sequence star. It has 7−8[6] times the mass of the Sun and about 3.9[7] times the Sun's radius. The star is around nine million years old and is radiating 2,578[6] times the Sun's luminosity from its photosphere at an effective temperature of 21,150 K.[6]
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