HD 192886
High proper motion star; F-type dwarf
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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,[3] 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[2] but is drifting closer with a heliocentric radial velocity of −29.6 km/s.[6] 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.[1]
 | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Telescopium[1] |
| Right ascension | 20h 19m 17.85169s[2] |
| Declination | −47° 34′ 49.0453″[2] |
| Apparent magnitude (V) | 6.13[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F5 V[4] or F6 IV-V[5] |
| U−B color index | +0.01[3] |
| B−V color index | +0.46[3] |
| Astrometry | |
| Radial velocity (Rv) | −29.6±0.6[6] km/s |
| Proper motion (μ) | RA: +192.878 mas/yr[2] Dec.: −183.183 mas/yr[2] |
| Parallax (π) | 31.657±0.028 mas[2] |
| Distance | 103.03 ± 0.09 ly (31.59 ± 0.03 pc) |
| Absolute magnitude (MV) | +3.69[1] |
| Details | |
| Mass | 1.32+0.27 −0.16[7] M☉ |
| Radius | 1.39±0.07[8] R☉ |
| Luminosity | 2.92±0.01[2] 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 | |
| 84 G. Telescopii[14], CD−47°13340, CPD−47°9478, GC 28213, HD 192886, HIP 100184, HR 7749, SAO 230150, LTT 8083[15] | |
| Database references | |
| SIMBAD | data |
HD 192886 has a stellar classification of F5 V,[4] making it an ordinary F-type main-sequence star. However, Richard O. Gray and colleagues give it a class of F6 IV-V,[5] 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[2] 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]