Celaeno (star)
Star in the Taurus constellation
From Wikipedia, the free encyclopedia
Celaeno (/səˈliːnoʊ/[11]), designated 16 Tauri, is a star in the constellation of Taurus and a member of the Pleiades open star cluster (M45) of stars.
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 44m 48.2149s[1] |
| Declination | +24° 17′ 22.083″[1] |
| Apparent magnitude (V) | +5.45[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1][3] |
| Spectral type | B7V[4] |
| U−B color index | –0.33[5] |
| B−V color index | –0.046[5] |
| Astrometry | |
| Radial velocity (Rv) | +2.9[6] km/s |
| Proper motion (μ) | RA: +19.849[1] mas/yr Dec.: –44.966[1] mas/yr |
| Parallax (π) | 7.3852±0.0724 mas[1] |
| Distance | 442 ± 4 ly (135 ± 1 pc) |
| Absolute magnitude (MV) | −0.76[7] |
| Details | |
| Mass | 4.0[7] M☉ |
| Radius | 2.34[8] R☉ |
| Luminosity | 344[7] L☉ |
| Surface gravity (log g) | 3.9[7] cgs |
| Temperature | 12,800[7] K |
| Metallicity [Fe/H] | −0.05[8] dex |
| Rotational velocity (v sin i) | 212[3] km/s |
| Age | 122[9] Myr |
| Other designations | |
| Celaeno, Celeno, 16 Tau, BD+23 505, GC 4475, HD 23288, HIP 17489, HR 1140, SAO 76126[10] | |
| Database references | |
| SIMBAD | data |
Properties
16 Tauri is a blue-white B-type subgiant with an apparent magnitude of +5.45. It is approximately 430 light years from the Sun;[12] about the same distance as the Pleiades. The interstellar extinction of this star is fairly small at 0.05 magnitudes.[13] The projected rotational velocity of the equator is 185 km/s.[14] It is 3.4 times the radius of the Sun[8] and has a surface temperature of 12,800 K.[7][15]
Nomenclature
16 Tauri is the star's Flamsteed designation.
It bore the traditional named Celaeno (or Celeno) and was called the "Lost Pleiad" by Theon the Younger.[16] Celaeno was one of the Pleiades sisters in Greek mythology. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[17] to catalogue and standardize proper names for stars. The WGSN approved the name Celaeno for this star on 21 August 2016 and it is now so entered in the IAU Catalog of Star Names.[18]
Namesake
USS Celeno (AK-76) was a United States Navy Crater class cargo ship named after the star.