HD 174500
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  | |
| 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 | |
| 34 G. Telescopii[13], CD−46°12676, CPD−46°9517, GC 25873, HD 174500, HIP 92669, HR 7097, SAO 229343[14] | |
| 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.
