HD 174387
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  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 52m 27.2298s[1] |
| Declination | −46° 35′ 42.4326″[1] |
| Apparent magnitude (V) | 5.49±0.01[2] |
| Characteristics | |
| Spectral type | M0 III[3] |
| B−V color index | +1.63[4] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | −28.1±0.9[6] km/s |
| Proper motion (μ) | RA: +28.229 mas/yr[1] Dec.: −0.941 mas/yr[1] |
| Parallax (π) | 4.0175±0.1091 mas[1] |
| Distance | 810 ± 20 ly (249 ± 7 pc) |
| Absolute magnitude (MV) | −1.97[7] |
| Details | |
| Mass | 1.14[8] M☉ |
| Radius | 82.63[9] R☉ |
| Luminosity | 902[10] L☉ |
| Surface gravity (log g) | 0.79[8] cgs |
| Temperature | 3929±122[11] K |
| Metallicity [Fe/H] | −0.04[8] dex |
| Other designations | |
| 33 G. Telescopii, NSV 24617, CD−46°12669, CPD−46°9512, GC 25861, HD 174387, HIP 92630, HR 7092, SAO 229336[12][13] | |
| Database references | |
| SIMBAD | data |
HD 174387 (HR 7092) is a solitary[14] star in the southern constellation Telescopium. With an apparent magnitude of 5.49,[2] it is faintly visible to the naked eye if viewed under dark skies. Parallax measurements put the object at a distance of 810 light years[1] and it is currently approaching the Solar System with a heliocentric radial velocity of −28.1 km/s.[6]
HD 174387 has a stellar classification of M0 III,[3] indicating that it is an ageing red giant. Due to its evolved state, the star has expanded to a diameter of 82.63 R☉.[9] At present it has 114% the mass of the Sun[8] and shines 902 times the luminosity of the Sun[10] from its enlarged photosphere at an effective temperature of 3,929 K,[11] giving a red hue when viewed. HD 174387's metallicity is estimated to be 91% that of the Sun.[8] The star is suspected to be variable, ranging from magnitudes 5.59 to 5.63 in the Hipparcos passband.[5]
