54 Ceti
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aries |
| Right ascension | 01h 50m 51.97276s[1] |
| Declination | +11° 02′ 36.1563″[1] |
| Apparent magnitude (V) | 5.94[2] |
| Characteristics | |
| Spectral type | F2 Vw[3] |
| U−B color index | –0.03[2] |
| B−V color index | +0.30[2] |
| R−I color index | 0.17 |
| Astrometry | |
| Radial velocity (Rv) | +11.1[4] km/s |
| Proper motion (μ) | RA: –69.39[1] mas/yr Dec.: –28.45[1] mas/yr |
| Parallax (π) | 23.80 ± 0.44[1] mas |
| Distance | 137 ± 3 ly (42.0 ± 0.8 pc) |
| Details | |
| Radius | 1.2–1.8[5] R☉ |
| Surface gravity (log g) | 4.50[3] cgs |
| Temperature | 7,099[3] K |
| Metallicity [Fe/H] | –0.20[3] dex |
| Rotational velocity (v sin i) | 29[6] km/s |
| Other designations | |
54 Ceti is an older Flamsteed designation[8] for a star that is now located within the constellation boundaries of Aries,[9] the Ram. In the present day it is known by star catalogue identifiers like HD 11257 or HR 534.[7] At an apparent visual magnitude of 5.94,[2] it can be seen with the naked eye. The distance to this star, as determined using parallax measurements made during the Hipparcos mission, is approximately 139 light-years (43 parsecs), give or take a 6 light-year margin of error.[1] It is located near the ecliptic and hence is subject to occasional occultations by the Moon and planets.[7]
This is an F-type main sequence star with a stellar classification of F2 Vw,[3] where the 'w' indicates weak absorption lines in the spectrum. It is a candidate member of the Ursa Major Moving Group, which has an estimated age of 500 ± 100 million years.[10]
References
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- ↑ 2.0 2.1 2.2 2.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 7.0 7.1 7.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. See the Online Data entry for HR 534.
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