Astronomy:Nu1 Lyrae
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 49m 45.91823s[1] |
| Declination | +32° 48′ 46.1464″[1] |
| Apparent magnitude (V) | 5.91[2] |
| Characteristics | |
| Spectral type | B3 IV[3] |
| U−B color index | −0.71[2] |
| B−V color index | −0.16[2] |
| Variable type | Suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | −26.30±1.2[5] km/s |
| Proper motion (μ) | RA: +1.540[1] mas/yr Dec.: −3.721[1] mas/yr |
| Parallax (π) | 2.6879 ± 0.0507[1] mas |
| Distance | 1,210 ± 20 ly (372 ± 7 pc) |
| Absolute magnitude (MV) | −1.73[6] |
| Details | |
| Mass | 6.9±0.1[3] M☉ |
| Radius | 5.9[7] R☉ |
| Luminosity | 1,460[8] L☉ |
| Surface gravity (log g) | 3.86[9] cgs |
| Temperature | 14,534[8] K |
| Metallicity [Fe/H] | −0.08[10] dex |
| Rotational velocity (v sin i) | 145[11] km/s |
| Age | 39.8±3.7[3] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu1 Lyrae (ν1 Lyrae) is a star in the northern constellation of Lyra. Based upon an annual parallax shift of 2.69 mas as seen from Earth, it is located around 1,210 light years from the Sun.[1] At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.35 due to interstellar dust.[6] With an apparent visual magnitude of 5.91,[2] the star is barely bright enough to be visible with the naked eye on a dark night.
This is a blue-white hued B-type subgiant star with a stellar classification of B3 IV.[3] It is a suspected variable.[4] The star has nearly seven times the mass of the Sun and, at an estimated age of about 40[3] million years, is spinning with a projected rotational velocity of 145 km/s.[11] It radiates approximately 1460 times the solar luminosity from its photosphere at an effective temperature of 14,534 K.[8]
Nu1 Lyrae has five faint visual companions listed in the Washington Double Star Catalog, the nearest being a magnitude 13.0 star at an angular separation of 33.7 arc seconds along a position angle of 76°, as of 2015.[13]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series 34: 1–49, Bibcode: 1978A&AS...34....1N.
- ↑ 3.0 3.1 3.2 3.3 3.4 Tetzlaff, N. et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T.
- ↑ 4.0 4.1 Samus, N. N. et al. (2009), "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)", VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1, Bibcode: 2009yCat....102025S.
- ↑ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.
- ↑ McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017), "Fundamental parameters and infrared excesses of Tycho-Gaia stars", Monthly Notices of the Royal Astronomical Society 471 (1): 770, doi:10.1093/mnras/stx1433, Bibcode: 2017MNRAS.471..770M.
- ↑ 8.0 8.1 8.2 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ Gerbaldi, M. et al. (November 2001), "Binary systems with post-T Tauri secondaries", Astronomy and Astrophysics 379: 162–184, doi:10.1051/0004-6361:20011298, Bibcode: 2001A&A...379..162G.
- ↑ Cardiel, Nicolás; Zamorano, Jaime; Carrasco, Josep Manel; Masana, Eduard; Bará, Salvador; González, Rafael; Izquierdo, Jaime; Pascual, Sergio et al. (2021), "RGB photometric calibration of 15 million Gaia stars", Monthly Notices of the Royal Astronomical Society 507 (1): 318, doi:10.1093/mnras/stab2124, Bibcode: 2021MNRAS.507..318C.
- ↑ 11.0 11.1 Abt, Helmut A. et al. (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal 573 (1): 359–365, doi:10.1086/340590, Bibcode: 2002ApJ...573..359A.
- ↑ "nu.01 Lyr". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=nu.01+Lyr.
- ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466–3471, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22.
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