HD 51418
Star in the constellation Auriga
HD 51418
Location of HD 51418 (circled)
Observation dataEpoch J2000.0 Equinox J2000.0
Constellation Auriga
Right ascension 06h 59m 20.12818s [ 1]
Declination +42° 18′ 53.1147″ [ 1]
Apparent magnitude (V)6.56 to 6.73[ 2]
Characteristics
Evolutionary stage main sequence [ 1]
Spectral type A0 SrCrEuDy,[ 3] [ 4]
Apparent magnitude (G)
6.74[ 1]
B−V color index
0.09[ 5]
J−H color index
-0.087[ 5]
J−K color index
-0.037[ 5]
Variable type α2 CVn variable [ 3]
Astrometry Radial velocity (Rv )± 3.0[ 6] km/s Proper motion (μ) RA: ± 0.087[ 1] mas /yr Dec.: ± 0.087[ 1] mas /yr Parallax (π)5.6092± 0.0929 mas [ 1] Distance 581 ± 10 ly pc ) Details Mass ± 0.178[ 7] M ☉ Radius ± 0.165[ 7] R ☉ Other designations AG +42° 775BD +42°1629GC 9158HD 51418HIP 33643SAO 41475PPM 49494TIC 192072521TYC 2950-1335-1GSC 02950-013352MASS J06592013+4218531Gaia DR2 951315950188279424Gaia DR3 951315950188279424[ 5] Database references SIMBAD data
HD 51418 (NY Aurigae ) is an Ap star and an α2 CVn variable located about 178 parsecs (580 ly) away in the northern constellation of Auriga . With an apparent magnitude varying around 6.6 and a spectral type of A0, it can be faintly visible by the naked eye as a whitish dot under very good circumstances. The star has been noted as an "extreme lanthanide star,"[ 8] metals including europium , dysprosium , and holmium , which can be observed in the star's spectra as emission lines .[ 3] [ 9]
A light curve for NY Aurigae, plotted from Hipparcos [ 10] In 1972, Austin F. Gulliver et al. announced that HD 51418 is a variable star .[ 11] variable star designation , NY Aurigae, in 1975.[ 12] magnetic field , which fluctuates in strength between −22–75 milliteslas (−220–750 G ) .[ 13] luminosity and rare-earth detection.[ 9]
References
1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A& A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 .
Gaia DR3 record for this source at VizieR . ↑ Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports . 61 (1): 80. Bibcode :2017ARep...61...80S . doi :10.1134/S1063772917010085 . 1 2 3 Bychkov, V. D.; Bychkova, L. V.; Madej, J. (2021). "Catalog of averaged magnetic phase curves of stars: Second edition". Astronomy & Astrophysics . 652 : A31. arXiv :2004.14099 Bibcode :2021A& A...652A..31B . doi :10.1051/0004-6361/202040215 . ISSN 0004-6361 . Record for this source at VizieR .↑ Pyper, Diane M.; Adelman, Saul J. (1 August 2021). "Light Curve Changes and Possible Precession in mCP Stars". Publications of the Astronomical Society of the Pacific . 133 (1026): 084203. Bibcode :2021PASP..133h4203P . doi :10.1088/1538-3873/ac1ac0 . ISSN 0004-6280 . 1 2 3 4 "HD 51418" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 24 September 2024 .↑ Brandt, Timothy D. (1 June 2021). "The Hipparcos–Gaia Catalog of Accelerations: Gaia EDR3 Edition" . The Astrophysical Journal Supplement Series . 254 (2): 42. arXiv :2105.11662 Bibcode :2021ApJS..254...42B . doi :10.3847/1538-4365/abf93c ISSN 0067-0049 . 1 2 Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric (2019). "Stellar and substellar companions of nearby stars from Gaia DR2: Binarity from proper motion anomaly". Astronomy & Astrophysics . 623 : A72. arXiv :1811.08902 Bibcode :2019A& A...623A..72K . doi :10.1051/0004-6361/201834371 . ISSN 0004-6361 . Record for this source at VizieR .↑ Hümmerich, S.; Paunzen, E.; Bernhard, K. (2020). "A plethora of new, magnetic chemically peculiar stars from LAMOST DR4". Astronomy & Astrophysics . 640 : A40. arXiv :2005.14444 Bibcode :2020A& A...640A..40H . doi :10.1051/0004-6361/202037750 . ISSN 0004-6361 . 1 2 Jones, T. J.; Wolff, S. C.; Bonsack, W. K. (1974). "The Holmium AP star HD 51418". The Astrophysical Journal . 190 : 579. Bibcode :1974ApJ...190..579J . doi :10.1086/152913 . ISSN 0004-637X . ↑ EAS (1997). "The HIPPARCOS and TYCHO catalogues" . Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astrometry Mission . ESA SP Series. 1200 . Noordwijk, Netherlands: ESA Publications Division. Bibcode :1997ESASP1200.....E . ISBN 9290923997 . Retrieved 15 October 2022 . ↑ Gulliver, A. F.; Macrae, D. A.; Percy, J. R.; Winzer, J. E. (February 1972). "The spectrum and light variations in the peculiar A star HD 51418". Journal of the Royal Astronomical Society of Canada . 66 : 72. Bibcode :1972JRASC..66...72G . ↑ Kukarkin, B. V.; Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (January 1975). "60th Name-List of Variable Stars" (PDF) . Information Bulletin on Variable Stars . 961 : 1. Bibcode :1975IBVS..961....1K . Retrieved 30 November 2024 . ↑ Campos, L. M. B. C. (11 January 2011). "On magnetoacoustic-gravity-inertial (MAGI) waves - II. Application to magnetic and rotating stars: MAGI waves in magnetic and rotating stars" . Monthly Notices of the Royal Astronomical Society . 410 (2): 735– 761. doi :10.1111/j.1365-2966.2010.17552.x Record for this source at VizieR .↑ Balega, Yu. Yu.; Dyachenko, V. V.; Maksimov, A. F.; Malogolovets, E. V.; Rastegaev, D. A.; Romanyuk, I. I. (2012). "Speckle interferometry of magnetic stars with the BTA. I. First results". Astrophysical Bulletin . 67 (1): 44– 56. Bibcode :2012AstBu..67...44B . doi :10.1134/S199034131201004X . ISSN 1990-3413 . Record for this source at VizieR .↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal . 122 (6): 3466– 3471. Bibcode :2001AJ....122.3466M . doi :10.1086/323920 . Record for this source at VizieR .
