Delta Fornacis
Star in the constellation Fornax
From Wikipedia, the free encyclopedia
Delta Fornacis, Latinized from δ Fornacis, is a solitary,[12] blue-white hued star near the middle of the southern constellation of Fornax. With an apparent visual magnitude of 5.00,[2] it is faintly visible to the naked eye at night. The star has an annual parallax shift of 4.1 mas,[1] indicating it lies at a distance of approximately 790 light years from the Sun. It is drifting further away with a radial velocity of +26 km/s.[4]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Fornax |
| Right ascension | 03h 42m 14.90238s[1] |
| Declination | −31° 56′ 18.0961″[1] |
| Apparent magnitude (V) | 5.00[2] |
| Characteristics | |
| Spectral type | B5 III[3] |
| U−B color index | −0.60[2] |
| B−V color index | −0.16[2] |
| Astrometry | |
| Radial velocity (Rv) | +26.00[4] km/s |
| Proper motion (μ) | RA: +4.942[1] mas/yr Dec.: +13.326[1] mas/yr |
| Parallax (π) | 4.1125±0.2114 mas[1] |
| Distance | 790 ± 40 ly (240 ± 10 pc) |
| Absolute magnitude (MV) | −2.07[5] |
| Details | |
| Mass | 5.9±0.2[6] M☉ |
| Radius | 6.0[7] R☉ |
| Luminosity | 1,291[8] L☉ |
| Temperature | 16,230±930[9] K |
| Rotational velocity (v sin i) | 185[10] km/s |
| Age | 63.1±16.1[6] Myr |
| Other designations | |
| δ For, CD−32°1430, FK5 133, HD 23227, HIP 17304, HR 1134, SAO 194467[11] | |
| Database references | |
| SIMBAD | data |
The stellar classification of Delta Fornacis is B5 III,[3] matching an evolved B-type giant star. It has an angular diameter of 0.215±0.015 mas,[9] which, at the estimated distance of the star, yields a physical size of around 6 times the radius of the Sun.[7] Around 63 million years old,[6] the star is spinning rapidly with a projected rotational velocity of 185 km/s.[10] It has an estimated 5.9[6] times the Sun's mass and radiates 1,291[8] times the solar luminosity from its outer atmosphere at an effective temperature of 16,230 K.[9]
