HD 180134
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  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 19h 18m 09.78130s[1] |
| Declination | −53° 23′ 13.5119″[1] |
| Apparent magnitude (V) | 6.36±0.01[2] |
| Characteristics | |
| Spectral type | F7 V[3] |
| B−V color index | +0.49[4] |
| Astrometry | |
| Radial velocity (Rv) | −22.5±0.3[5] km/s |
| Proper motion (μ) | RA: +24.761 mas/yr[1] Dec.: −81.714 mas/yr[1] |
| Parallax (π) | 21.9768±0.0272 mas[1] |
| Distance | 148.4 ± 0.2 ly (45.50 ± 0.06 pc) |
| Absolute magnitude (MV) | +3.09[6] |
| Details | |
| Mass | 1.32[7] M☉ |
| Radius | 1.90±0.07[8] R☉ |
| Luminosity | 4.93±0.01[1] L☉ |
| Surface gravity (log g) | 4.07±0.04[9] cgs |
| Temperature | 6,230±55[8] K |
| Metallicity [Fe/H] | −0.03±0.05[9] dex |
| Rotational velocity (v sin i) | 10±3[10] km/s |
| Age | 3.28±0.51[11] Gyr |
| Other designations | |
| 52 G. Telescopii[12], CD−53°8089, CPD−53°9513, GC 26573, HD 180134, HIP 94858, HR 7297, SAO 246017[13] | |
| Database references | |
| SIMBAD | data |
HD 180134 (HR 7297; 52 G. Telescopii) is a solitary star located in the southern constellation Telescopium. It has an apparent magnitude of 6.36,[2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively close at a distance of 148.4 light-years based on Gaia DR3 parallax measurements,[1] and it is drifting closer with a heliocentric radial velocity of −22.5 km/s.[5] At its current distance, HD 180134's brightness is diminished by two-tenths of a magnitude due to interstellar extinction[14] and it has an absolute magnitude of +3.09.[6]
HD 180134 has a stellar classification of F7 V,[3] indicating that it is an ordinary F-type main-sequence star that is currently generating energy via hydrogen fusion at its core. It has 1.32 times the mass of the Sun[7] and 1.9 times the radius of the Sun.[8] It radiates 4.93 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,230 K,[8] giving a whitish-yellow hue when viewed in the night sky. HD 180134 is slightly metal deficient with an iron abundance 93% that of the Sun or [Fe/H] = −0.03,[9] and it spins modestly with a projected rotational velocity of approximately 10 km/s.[10] At the age of 3.28 billion years,[11] it is 1.49 magnitudes above the zero age main sequence, meaning that it is evolved.[15]
In 2006, an infrared excess was detected around the star, which could indicate the presence of a circumstellar disk. The disk has a temperature less than 145 K, making it a cool disk; it has an angular separation greater than 0.19 arcseconds or a physical separation greater than 8.6 astronomical units.[16]
