HD 28454
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Caelum[1] |
| Right ascension | 04h 27m 05.96464s[2] |
| Declination | −46° 56′ 50.9697″[2] |
| Apparent magnitude (V) | 6.10[1] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F5.5 V[3] |
| U−B color index | −0.07[4] |
| B−V color index | +0.48[4] |
| Astrometry | |
| Radial velocity (Rv) | 15±2.4[5] km/s |
| Proper motion (μ) | RA: +63.853 mas/yr[2] Dec.: −270.620 mas/yr[2] |
| Parallax (π) | 30.6049±0.0259 mas[2] |
| Distance | 106.57 ± 0.09 ly (32.67 ± 0.03 pc) |
| Absolute magnitude (MV) | +3.5[1] |
| Details | |
| Mass | 1.24[6] M☉ |
| Radius | 1.42±0.06[7] R☉ |
| Luminosity | 3.26±0.01[2] L☉ |
| Surface gravity (log g) | 4.30 ± 0.14[8] cgs |
| Temperature | 6,468±80[9] K |
| Metallicity [Fe/H] | −0.25±0.10[10] dex |
| Rotation | 14.810 days[11] |
| Rotational velocity (v sin i) | 8[12] km/s |
| Age | 1.61[6] Gyr |
| Other designations | |
| 3 G. Caeli[13], CD−47°1383, CPD−47°441, FK5 2329, GC 5428, HD 28454, HIP 20781, HR 1418, SAO 216809[14] | |
| Database references | |
| SIMBAD | data |
HD 28454, also known as HR 1418, is a solitary, yellowish-white hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 6.1,[1] making it faintly visible to the naked eye under ideal conditions. This star is located relatively close at a distance of about 107 light years based on parallax measurements of Gaia DR3 but is receding with a heliocentric radial velocity of 15 km/s.[5]
This star was designated Chi Horologii by Johann Elert Bode in his 1801 Uranographia, but this is now no longer used.[15]
HD 28454 is an ordinary F-type main sequence star with a stellar classification of F5.5 V.[3] It has 1.21 times the mass of the Sun[6] and 1.42 times its radius.[7] It radiates 3.26 times the luminosity of the Sun[2] from its photosphere at an effective temperature of 6,468 K.[9] HD 28454 is estimated to be 1.61 billion years,[6] and spins modestly with a projected rotational velocity of 8 km/s.[12] The star is metal deficient, having an iron abundance 56% that of the Sun's.[10]
A candidate extrasolar planet has been detected from Gaia DR3 astrometry. It has a minimum mass of 8 MJ and a minimum semi-major axis of 2.27 astronomical units.[16]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | ≥8.0 MJ | ≥2.27 | — | — | — | — |
