HD 183144
Star in the constellation Aquila
From Wikipedia, the free encyclopedia
HD 183144 is a suspected variable star in the equatorial constellation of Aquila. It is a hot giant star about 1,130 light years away.
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Aquila[2] |
| Right ascension | 19h 27m 33.90756s[3] |
| Declination | +14° 16′ 56.9284″[3] |
| Apparent magnitude (V) | 6.32[4] |
| Characteristics | |
| Spectral type | B4III[5] |
| U−B color index | −0.512[2] |
| B−V color index | −0.068±0.005[2] |
| Variable type | suspected[6] |
| Astrometry | |
| Radial velocity (Rv) | +4.0±4.3[7][2] km/s |
| Proper motion (μ) | RA: 6.162[3] mas/yr Dec.: −4.550[3] mas/yr |
| Parallax (π) | 2.8745±0.0280 mas[3] |
| Distance | 1,130 ± 10 ly (348 ± 3 pc) |
| Absolute magnitude (MV) | −0.66[2] |
| Details | |
| Mass | 5.1[8] M☉ |
| Radius | 5.8[9] R☉ |
| Luminosity | 2,676[10] L☉ |
| Surface gravity (log g) | 3.73[8] cgs |
| Temperature | 15,139[8] K |
| Metallicity [Fe/H] | −0.003[8] dex |
| Rotational velocity (v sin i) | 200[11] km/s |
| Age | 160[12] Myr |
| Other designations | |
| BD+13°4020, HD 183144, HIP 95664, HR 7396, SAO 104862[13] | |
| Database references | |
| SIMBAD | data |
Results from the MASCARA experiment indicate that HD 183144 is a pulsating variable star with a period of 0.3649 days, during which it varies by 0.01 magnitude in white light.[14][15] It has a mass five times that of the Sun and, at an age of 160 million years, has already evolved away from the main sequence. It has expended to nearly six times the radius of the Sun and, with an effective temperature of 15,139 K, it has a bolometric luminosity of 2,676 L☉.