HD 143346
Star in the constellation Apus
From Wikipedia, the free encyclopedia
HD 143346 (HR 5595) is a single[14] star in the southern circumpolar constellation of Apus. It is 28.5 minutes west and about 5° north of the yellow giant star Gamma Apodis, which is the second brightest star in the constellation of Apus.
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Apus |
| Right ascension | 16h 05m 55.8193s[1] |
| Declination | −72° 24′ 03.2428″[1] |
| Apparent magnitude (V) | 5.68±0.01[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch[3] |
| Spectral type | K1.5 III CN1[4] |
| U−B color index | +1.26[5] |
| B−V color index | +1.17[5] |
| Astrometry | |
| Radial velocity (Rv) | 49±0.9[6] km/s |
| Proper motion (μ) | RA: −32.468 mas/yr Dec.: +70.299 mas/yr |
| Parallax (π) | 11.3858±0.0386 mas[1] |
| Distance | 286.5 ± 1.0 ly (87.8 ± 0.3 pc) |
| Absolute magnitude (MV) | +0.95[7] |
| Details | |
| Mass | 1.18[8] M☉ |
| Radius | 10.6[9] R☉ |
| Luminosity | 52.6±0.4[1] L☉ |
| Surface gravity (log g) | 2.43[8] cgs |
| Temperature | 4,520±90[10] K |
| Metallicity [Fe/H] | +0.30±0.16[3] dex |
| Rotational velocity (v sin i) | <1[11] km/s |
| Other designations | |
| 38 G. Apodis[12], CPD−72° 1902, FK5 3269, GC 21557, HD 143346, HIP 78868, HR 5955, SAO 257357[13] | |
| Database references | |
| SIMBAD | data |
This object has an orange hue and is visible to the naked eye as a dim point of light with an apparent visual magnitude of 5.68[2] It is located at a distance of approximately 286 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of 49 km/s. At that distance, the visual brightness of this star is diminished by an extinction of 0.174 due to interstellar dust.[3] The star has an absolute magnitude of 0.95.[7]
HD 1433456 has a stellar classification of K1.5III CN1,[4] indicating a red giant that has an anomalous overabundance of cyanogen in the spectrum. It is currently on the horizontal branch, generating fusion via a helium core. At present it has 118% the mass of the Sun but has expanded to 10.6 times the radius of the Sun.[9] The star is radiating 53 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 4,520 K.[10] HD 1433456 is a member of the Milky Way's thick disk,[15] but is metal enriched.[3] It spins with a projected rotational velocity lower than 1 km/s.[11]