Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Telescopium |
Right ascension | 20h 19m 17.85169s[1] |
Declination | −47° 34′ 49.0453″[1] |
Apparent magnitude (V) | 6.13[2] |
Characteristics | |
Spectral type | F5 V[3] or F6 IV-V[4] |
U−B color index | +0.01[2] |
B−V color index | +0.46[2] |
Astrometry | |
Radial velocity (Rv) | −29.6±0.6[5] km/s |
Proper motion (μ) | RA: +192.878 mas/yr[1] Dec.: −183.183 mas/yr[1] |
Parallax (π) | 31.657 ± 0.028 mas[1] |
Distance | 103.03 ± 0.09 ly (31.59 ± 0.03 pc) |
Absolute magnitude (MV) | +3.69[6] |
Details | |
Mass | 1.32+0.27 −0.16[7] M☉ |
Radius | 1.39±0.07[8] R☉ |
Luminosity | 2.92±0.01[1] L☉ |
Surface gravity (log g) | 4.32[9] cgs |
Temperature | 6,459±52[10] K |
Metallicity [Fe/H] | +0.02[11] dex |
Rotational velocity (v sin i) | 11.6±1.1[12] km/s |
Age | 2.23[13] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 192886, also known as HR 7749 or rarely 84 G. Telescopii, is a solitary, yellowish-white hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.13,[2] making it barely visible to the naked eye, even in ideal conditions. The object is located relatively close at a distance of only 103 light years[1] but is drifting closer with a heliocentric radial velocity of −29.6 km/s.[5] At its current distance, HD 192886's brightness is diminished by 0.13 magnitudes due to extinction from interstellar dust.[16] It has an absolute magnitude of +3.69.[6]
HD 192886 has a stellar classification of F5 V,[3] making it an ordinary F-type main-sequence star. However, Richard O. Gray and colleagues give it a class of F6 IV-V,[4] indicating that it is slightly cooler and more evolved. It has 1.32 times the mass of the Sun[7] and 1.39 times the Sun's radius.[8] It radiates 2.92 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,459 K.[10] It has a solar metallicity ([Fe/H] = +0.02[11]) and is estimated to be 2.23 billion years old.[13] HD 192886 is more likely a main sequence star because it is only 0.24 magnitudes above the main sequence.[17] The star spins modestly with a projected rotational velocity of 11.6 km/s.[12]