HD 174430
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  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 53m 12.00295s[1] |
| Declination | −51° 55′ 53.1748″[1] |
| Apparent magnitude (V) | 6.29±0.01[2] |
| Characteristics | |
| Spectral type | B3/5 III[3] |
| B−V color index | −0.09[4] |
| Astrometry | |
| Radial velocity (Rv) | −23.0±4.3[5] km/s |
| Proper motion (μ) | RA: +2.869 mas/yr[1] Dec.: −12.640 mas/yr[1] |
| Parallax (π) | 2.8731±0.0531 mas[1] |
| Distance | 1,140 ± 20 ly (348 ± 6 pc) |
| Absolute magnitude (MV) | −1.80[6] |
| Details | |
| Mass | 4.05[7] M☉ |
| Radius | 5.72±0.29[8] R☉ |
| Luminosity | 696[9] L☉ |
| Surface gravity (log g) | 3.56[7] cgs |
| Temperature | 14,824[10] K |
| Metallicity [Fe/H] | −0.01[7] dex |
| Age | 76[11] Myr |
| Other designations | |
| 32 G. Telescopii[12], CD−52°8861, CPD−52°11273, GC 25871, HD 174430, HIP 92687, HR 7093, SAO 245783[13] | |
| Database references | |
| SIMBAD | data |
HD 174430, also designated as HR 7093 or rarely 32 G. Telescopii, is a solitary blue-hued star located in the southern constellation Telescopium near Kappa Telescopii. It has an apparent magnitude of 6.29,[2] placing it near the limit for naked eye, even under ideal conditions. The object is located relatively far at a distance of 1,140 light-years based on Gaia DR3 parallax measurements,[1] but it is drifting closer with a heliocentric radial velocity of −23 km/s.[5] At its current distance, HD 174430's brightness is diminished by 0.32 magnitudes due to interstellar extinction[14] and it has an absolute magnitude of −1.80.[6]
HD 174430 has a stellar classification of B3/5 III,[3] indicating that it is an evolved B-type star with the characteristics of a B3 and B5 giant star. It has also been given a less evolved class of B6 V.[15] It has 4.05 times the mass of the Sun[7] and 5.72 times the radius of the Sun.[8] It radiates 696 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 14,824 K.[10] HD 174430 has a near solar metallicity of [Fe/H] = −0.01[7] and it is estimated to be 76 million years old.[11]
