Binary star system in the constellation Aries
λ Arietis
Observation dataEpoch J2000 Equinox J2000
Constellation
Aries
Right ascension
01 57 55.71647
Declination
+23° 35′ 45.8295″
Apparent magnitude (V)
4.79 (4.95/7.75)
Characteristics
Spectral type
F0 V + G1 V
U−B color index
+0.09
B−V color index
+0.28
R−I color index
0.16
Astrometry Radial velocity (Rv )-1.4 km/s Proper motion (μ) RA: -92.55 mas /yr Dec.: -13.25 mas /yr Parallax (π)25.32 ± 0.30 mas Distance 129 ± 2 ly pc ) Details λ Ari A Surface gravity (log g )3.88 cgs Temperature 7,177 K Metallicity +0.01 dex Rotational velocity (v sin i )107 km/s λ Ari B Surface gravity (log g )3.88 cgs Temperature 5,929 K Metallicity –0.03 dex Other designations 9 Arietis, BD +22 288, HD 11973, HIP 9153, HR 569, SAO 75051, GC 2366, ADS 1563, CCDM 01580+2336. Database references SIMBAD data
Lambda Arietis (λ Ari, λ Arietis) is the Bayer designation for a double star in the northern constellation of Aries . Based upon an annual parallax shift of 25.32 arcseconds , this system is approximately 129 light-years (40 parsecs ) distant from Earth . The pair have a combined apparent visual magnitude of 4.79, which is bright enough to be viewed with the naked eye. Because the yellow secondary is nearly three magnitudes fainter than the white primary, they are a challenge to split with quality 7× binoculars and are readily resolvable at 10×.
The brighter component is an F-type main sequence star with a visual magnitude of 4.95 and a stellar classification of F0 V. At an angular separation of 37.4 arcseconds is fainter, magnitude 7.75 companion. This is a G-type main sequence star with a classification of G1 V.
References
^ 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 .
^ Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory , 4 (99): 99, Bibcode :1966CoLPL...4...99J .
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv :0806.2878 , Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x , S2CID 14878976 .
Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication , Washington: Carnegie Institution of Washington , Bibcode :1953GCRV..C......0W .
^ Soubiran, C.; Le Campion, J.-F.; Cayrel de Strobel, G.; Caillo, A. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics , 515 : A111, arXiv :1004.1069 , Bibcode :2010A&A...515A.111S , doi :10.1051/0004-6361/201014247 , S2CID 118362423 .
Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics , 463 (2): 671–682, arXiv :astro-ph/0610785 , Bibcode :2007A&A...463..671R , doi :10.1051/0004-6361:20065224 , S2CID 18475298 .
"lam Ari" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2012-08-07.{{cite web }}: CS1 maint: postscript (link )
Harrington, Philip S. (2010), Cosmic Challenge: The Ultimate Observing List for Amateurs Cambridge University Press , p. 113, ISBN 978-0521899369
References
Categories :
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
**DISCLAIMER** We are not affiliated with Wikipedia, and Cloudflare.
The information presented on this site is for general informational purposes only and does not constitute medical advice.
You should always have a personal consultation with a healthcare professional before making changes to your diet, medication, or exercise routine.
AI helps with the correspondence in our chat.
We participate in an affiliate program. If you buy something through a link, we may earn a commission 💕
↑
Location of λ Arietis (circled)
Category