58 Aquilae
58 Aquilae is a single[7] star located around 520 light years from the Sun in the equatorial constellation of Aquila, near Eta Aquilae. 58 Aquilae is its Flamsteed designation. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.60.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −53 km/s,[4] and may come as close as 161 light-years in around 1.8 million years.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 54m 44.79543s[1] |
| Declination | +00° 16′ 25.0534″[1] |
| Apparent magnitude (V) | 5.60[2] |
| Characteristics | |
| Spectral type | B9 IV[3] |
| B−V color index | 0.098±0.026[2] |
| Astrometry | |
| Radial velocity (Rv) | −53.1[4] km/s |
| Proper motion (μ) | RA: +39.126[1] mas/yr Dec.: –13.931[1] mas/yr |
| Parallax (π) | 6.2649 ± 0.1382 mas[1] |
| Distance | 520 ± 10 ly (160 ± 4 pc) |
| Absolute magnitude (MV) | 0.32[2] |
| Details | |
| Radius | 5.62+0.08 −0.19[1] R☉ |
| Luminosity | 116.5±3.0[1] L☉ |
| Surface gravity (log g) | 3.8[4] cgs |
| Temperature | 7,946[5] K |
| Metallicity [Fe/H] | −0.23±0.04[2] dex |
| Rotational velocity (v sin i) | 110[4] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object has a stellar classification of B9 IV,[3] matching a late B-type subgiant star. It has 5.6[1] times the radius of the Sun with a high rate of spin, showing a projected rotational velocity of 110 km/s.[4] The star is radiating 117[1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,946 K.[5]
References edit
- ^ a b c d e f g h i Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e f Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
- ^ a b c d e Gebran, M.; et al. (2016), "A new method for the inversion of atmospheric parameters of A/Am stars", Astronomy & Astrophysics, 589: A83, arXiv:1603.01146, Bibcode:2016A&A...589A..83G, doi:10.1051/0004-6361/201528052, S2CID 118549566.
- ^ a b Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016), "The PASTEL catalogue: 2016 version", Astronomy & Astrophysics, 591: A118, arXiv:1605.07384, Bibcode:2016A&A...591A.118S, doi:10.1051/0004-6361/201628497, S2CID 119258214.
- ^ "58 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 1, 2018.
- ^ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.