Delta Caeli
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Caelum |
| Right ascension | 04h 30m 50.100s |
| Declination | −44° 57′ 13.50″ |
| Apparent magnitude (V) | +5.06 |
| Characteristics | |
| Spectral type | B2 IV-V |
| U−B color index | −0.78 |
| B−V color index | −0.20 |
| Astrometry | |
| Radial velocity (Rv) | 14.2±0.8 km/s |
| Proper motion (μ) | RA: +1.683 mas/yr Dec.: −3.139 mas/yr |
| Parallax (π) | 4.7826±0.0889 mas |
| Distance | 680 ± 10 ly (209 ± 4 pc) |
| Absolute magnitude (MV) | −1.35 |
| Details | |
| Mass | 6.78±0.06 M☉ |
| Radius | 3.95±0.10 R☉ |
| Luminosity | 2,075+73 −68 L☉ |
| Surface gravity (log g) | 3.965+0.012 −0.016 cgs |
| Temperature | 19,616±32 K |
| Rotational velocity (v sin i) | 10.0 km/s |
| Age | 9.4±0.6 Myr |
| Other designations | |
| δ Cae, CD−45°1567, FK5 167, HD 28873, HIP 21060, HR 1443, SAO 216850 | |
| Database references | |
| SIMBAD | data |
Delta Caeli is a solitary, blue-white hued star in the southern constellation of Caelum. Its name is a Bayer designation that is Latinized from δ Caeli, and abbreviated Delta Cae or Delta Cae. This is a dim star but visible to the naked eye, having an apparent visual magnitude of +5.06. Based upon an annual parallax shift of 4.63 mas as seen from Earth, this star is located approximately 680 light-years (210 pc) away. At that distance, the visual magnitude is diminished by an extinction factor of 0.13 due to interstellar dust. It is receding from the Sun with a radial velocity of 14 km/s.
This is a B-type star with a stellar classification of B2 IV-V, where the luminosity class IV-V indicates the spectrum shows mixed traits of a subgiant star and a main sequence star. It has 7 times the mass of the Sun and about 4 times the Sun's radius. The star is around nine million years old and is spinning with a projected rotational velocity of 10 km/s. It is radiating 2,075 times the Sun's luminosity from its photosphere at an effective temperature of 19,616 K.