HD 174430

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

Location of HD 174430 and κ Tel (circled)
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 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]