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]