Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Telescopium |
Right ascension | 18h 52m 59.90009s[1] |
Declination | −46° 35′ 10.7923″[1] |
Apparent magnitude (V) | 6.16±0.01[2] |
Characteristics | |
Evolutionary stage | subgiant[3] |
Spectral type | A1 IV/V[4] |
U−B color index | +0.05[5] |
B−V color index | +0.04[5] |
Astrometry | |
Radial velocity (Rv) | 35.1±1.7[6] km/s |
Proper motion (μ) | RA: +3.439 mas/yr[1] Dec.: +10.006 mas/yr[1] |
Parallax (π) | 4.7156 ± 0.035 mas[1] |
Distance | 692 ± 5 ly (212 ± 2 pc) |
Absolute magnitude (MV) | −0.82[7] |
Details | |
Mass | 3.00±0.09[1] M☉ |
Radius | 5.05±0.26[8] R☉ |
Luminosity | 273+57 −47[3] L☉ |
Surface gravity (log g) | 3.47+0.08 −0.05[9] cgs |
Temperature | 9,594+134 −132[3] K |
Metallicity [Fe/H] | +0.02[10] dex |
Rotational velocity (v sin i) | 214[11] km/s |
Age | 370[12] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 174500, also designated as HR 7097 or rarely 34 G. Telescopii, is a solitary white-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.16,[2] placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place the object 692 light years away,[1] and it is currently receding with a heliocentric radial velocity of 35 km/s.[6] At its current distance, HD 174500's brightness is diminished by 0.39 magnitudes due to interstellar dust.[15] It has an absolute magnitude of −0.82.[7]
HD 174500 has a stellar classification of A1 IV/V,[4] indicating that it is an evolved A-type star with the blended luminosity class of a subgiant and a main sequence star. It has 3 times the mass of the Sun[1] and an enlarged radius of 5.05 R☉.[8] It radiates 273 times the luminosity of the Sun from its photosphere at an effective temperature of 9,594 K.[3] At the age of 370 million years HD 174500 is currently on the subgiant track and is 1.8% past its main sequence lifetime.[3] Like many hot stars it spins rapidly, having a projected rotational velocity of 214 km/s.[11] It has a solar metallicity with [Fe/H] = +0.02.[10]
This object is located close to the 5th magnitude star HD 174387. However, they do not form a double star.