46 Aquilae
Star in the constellation Aquila / From Wikipedia, the free encyclopedia
46 Aquilae is a star in the constellation of Aquila, located to the north of Tarazed (γ Aquilae). 46 Aquilae is its Flamsteed designation. It is a dim, blue-white hued star that is a challenge to view with the naked eye, having an apparent visual magnitude of 6.33.[2] This object is located approximately 830 light years from the Sun, based on parallax.[1] It is moving closer to the Earth with a heliocentric radial velocity of −25 km/s.[2]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 19h 42m 12.81242s[1] |
Declination | 12° 11′ 35.7382″[1] |
Apparent magnitude (V) | 6.33[2] |
Characteristics | |
Spectral type | B9III[3] |
U−B color index | −0.42[4] |
B−V color index | −0.077±0.004[2] |
Astrometry | |
Radial velocity (Rv) | −24.7±1.6[2] km/s |
Proper motion (μ) | RA: −0.495[1] mas/yr Dec.: −8.147[1] mas/yr |
Parallax (π) | 3.9251 ± 0.0579 mas[1] |
Distance | 830 ± 10 ly (255 ± 4 pc) |
Absolute magnitude (MV) | −0.32[2] |
Details[5] | |
Luminosity | 179.50[2] L☉ |
Surface gravity (log g) | 3.7 cgs |
Temperature | 12,900 K |
Metallicity [Fe/H] | 0.50[6] dex |
Rotational velocity (v sin i) | 1.0±0.5 km/s |
Other designations | |
Database references | |
SIMBAD | data |
This body has a stellar classification of B9 III,[7] matching a late B-type giant star. It is a chemically peculiar star of a weak Mercury-Manganese type (CP3),[8] and is the most chromium–deficient star known.[9] The star may possess a magnetic field with a strength greater than 2 kG.[10] It is radiating 180[2] times the luminosity of the Sun from its photosphere at an effective temperature of 12,900 K.[5]