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 | |
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.