| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 18h05m 26.85525s[1] |
| Declination | −81° 29′ 11.6368″[1] |
| Apparent magnitude (V) | 6.35±0.01[2] |
| Characteristics | |
| Spectral type | K3/4 III[3] |
| U−B color index | +1.75[4] |
| B−V color index | +1.50[4] |
| Astrometry | |
| Radial velocity (Rv) | −3.3±0.4[5] km/s |
| Proper motion (μ) | RA: +28.344 mas/yr[1] Dec.: −48.347 mas/yr[1] |
| Parallax (π) | 3.2987 ± 0.0286 mas[1] |
| Distance | 989 ± 9 ly (303 ± 3 pc) |
| Absolute magnitude (MV) | −0.61[6] |
| Details | |
| Radius | 42.0+4.2 −4.1[7] or 67.8±1.6[1] R☉ |
| Luminosity | 495±13[7]or1,055+28 −27[1] L☉ |
| Surface gravity (log g) | 0.71±0.01[8] cgs |
| Temperature | 4,186±122[9] K |
| Metallicity [Fe/H] | −0.66[8] dex |
| Rotational velocity (v sin i) | <1.0[10] km/s |
| Other designations | |
65 G. Apodis[11], CD−81°673, CPD−81°799, FK5 3990, GC 24431, HD 162337, HIP 88599, HR 6646, SAO 258787[12] | |
| Database references | |
| SIMBAD | data |
HD 162337, also known as HR 6646 or rarely 65 G. Apodis, is a solitary orange-hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.35,[2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively far at a distance of 989 light-years based on Gaia DR3 parallax measurements,[1] but it is drifting closer with a heliocentric radial velocityof−3.3 km/s.[5] At its current distance, HD 162337's brightness is heavily diminished by 0.45 magnitudes due to interstellar extinction[13] and it has an absolute magnitude of −0.61.[6]
HD 162337 has a stellar classification of K3/4 III,[3] indicating that it is an evolved star with the characteristics of a K3 and K4 giant star. It has expanded to 42 times the radius of the Sun[7] and now radiates 495 times the luminosity of the Sun[7] from its enlarged photosphere at an effective temperatureof4,186 K.[9] However, Gaia DR3 stellar evolution models give a larger radiusof67.8±1.6 R☉[1] and a higher luminosityof1,055+28
−27 L☉.[1] HD 162337 is metal deficient with an iron abundance 21.9% that of the Sun's ([Fe/H] = −0.66)[8] and it spins too slowly for its projected rotational velocity to measured accurately.[10]
