Community hub
0 subscribers7 pages, 0 posts
Recent from talks
All channels
Be the first to start a discussion here.
Be the first to start a discussion here.
Be the first to start a discussion here.
Be the first to start a discussion here.
Contribute something
Welcome to the community hub built to collect knowledge and have discussions related to 16 Librae.
Nothing was collected or created yet.
16 Librae
View on Wikipediafrom Wikipedia
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Libra |
| Right ascension | 14h 57m 11.00009s[1] |
| Declination | −04° 20′ 47.2547″[1] |
| Apparent magnitude (V) | 4.49[2] |
| Characteristics | |
| Spectral type | F2 V[3] |
| U−B color index | +0.05[2] |
| B−V color index | +0.32[2] |
| Astrometry | |
| Radial velocity (Rv) | +26.3±0.6[4] km/s |
| Proper motion (μ) | RA: −96.98[1] mas/yr Dec.: −153.40[1] mas/yr |
| Parallax (π) | 37.17±0.32 mas[1] |
| Distance | 87.7 ± 0.8 ly (26.9 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.32[5] |
| Details | |
| 16 Lib A | |
| Mass | 1.47[6] M☉ |
| Luminosity | 9.77[5] L☉ |
| Surface gravity (log g) | 3.99[6] cgs |
| Temperature | 7,187±244[6] K |
| Metallicity [Fe/H] | −0.13[7] dex |
| Rotational velocity (v sin i) | 113.3[8] km/s |
| Age | 660[6] Myr |
| Other designations | |
| 16 Lib, BD−03°3696, FK5 3177, GJ 9503, HD 132052, HIP 73165, HR 5570, SAO 140240, WDS J14572-0421A[9] | |
| Database references | |
| SIMBAD | data |
16 Librae is a star in the constellation Libra. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.49.[2] An annual parallax shift of 37.17[1] mas yields a distance estimate of 87.7 light years. It is moving further from the Sun with a radial velocity of +26 km/s.[4]
This is an ordinary F-type main-sequence star with a stellar classification of F2 V.[3] It is an estimated 660[6] million years old and is spinning rapidly with a projected rotational velocity of 113 km/s.[8] The star has 1.47[6] times the mass of the Sun and is radiating nearly 10[5] times the Sun's luminosity from its photosphere at an effective temperature of about 7,187 K.[6]
16 Librae has a common proper motion companion located at an angular separation of 22.8 arc seconds along a position angle of 297°, as of 1999. Designated component B, this is a red dwarf star with a class of about M6 and an infrared J-band magnitude of 12.19.[10]
References
[edit]- ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b c d Ducati, J. R. (2002), "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system", CDS/ADC Collection of Electronic Catalogues, 2237, Bibcode:2002yCat.2237....0D.
- ^ 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 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c 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 c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ Casagrande, L.; et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics, 530: A138, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276, S2CID 56118016.
- ^ a b Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo" (PDF), Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04
- ^ "16 Lib". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-30.
- ^ Scholz, R. -D. (March 2016), "Overlooked wide companions of nearby F stars", Astronomy & Astrophysics, 587: 8, arXiv:1601.01896, Bibcode:2016A&A...587A..51S, doi:10.1051/0004-6361/201527965, S2CID 118348424, A51
| Stars |
| ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
| |||||||||||||
| Galaxies |
| ||||||||||||
