HD 168871
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 24m 33.13773s[1] |
| Declination | −49° 39′ 10.3588″[1] |
| Apparent magnitude (V) | 6.45±0.01[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| Spectral type | G1/2 V[3] or G0- V[4] |
| U−B color index | +0.05[5] |
| B−V color index | +0.58[5] |
| Astrometry | |
| Radial velocity (Rv) | +35.10±0.69[6] km/s |
| Proper motion (μ) | RA: +32.659 mas/yr[1] Dec.: −149.822 mas/yr[1] |
| Parallax (π) | 36.5735±0.0221 mas[1] |
| Distance | 89.18 ± 0.05 ly (27.34 ± 0.02 pc) |
| Absolute magnitude (MV) | +4.19[7] |
| Details | |
| Mass | 1.03±0.03[8] M☉ |
| Radius | 1.25±0.03[9] R☉ |
| Luminosity | 1.659+0.005 −0.006[1] L☉ |
| Surface gravity (log g) | 4.23±0.04[10] cgs |
| Temperature | 5994±29[11] K |
| Metallicity [Fe/H] | −0.09±0.01[12] dex |
| Rotational velocity (v sin i) | 3.1[11] km/s |
| Age | 6.05±1.40[13] Gyr |
| Other designations | |
| 9 G. Telescopii[14], CD−49 12105, CPD−49 10555, GC 29505, HD 168871, HIP 90223, SAO 228983, TIC 160991902[15] | |
| Database references | |
| SIMBAD | data |
HD 168871 (HIP 90223; 9 G. Telescopii) is a star located in the southern constellation Telescopium. It has an apparent magnitude of 6.45,[2] placing it near the limit for naked eye visibility. The object is located relatively close at a distance of 89.2 light-years based on Gaia DR3 parallax measurements,[1] but it is drifting away with a heliocentric radial velocity of 35.1 km/s.[6] At its current distance, HD 168871’s brightness is diminished by an interstellar extinction of 0.14 magnitudes[16] and it has a visual absolute magnitude of +4.19.[7] It has a relatively high proper motion across the celestial sphere,[17] moving at a rate of 153.34 mas/yr.[1]
HD 168871 has a stellar classification of G1/2 V,[3] indicating that it is a G-type main-sequence star with the characteristics of a G1 and G2 main sequence star. Gray et al. (2006) gives a classification of G0- V,[4] indicating that it is a slightly hotter main sequence star. It has 1.03 times the mass of the Sun[8] and 1.25 times the radius of the Sun.[9] It radiates 1.66 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 5,994 K,[11] giving it a whitish-yellow hue when viewed in the night sky. HD 168871 is slightly metal deficient with an iron abundance 81.3%of the Sun's.[12] It is older than the Sun at the age of 6.05 billion years[13] and it spins slowly with a projected rotational velocity of 3.1 km/s,[11] which is slightly faster than the Sun's rotational velocity of 2 km/s.
