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{{Starbox begin
| name = λ Arietis
}}{{Starbox image
| image={{Location mark
|image=Aries constellation map.svg|alt=|float=center|width=240
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=λ Arietis
|x=850|y=340
}}
|caption=Location of λ Arietis (circled)
}}{{Starbox observe
| epoch=J2000
| ra={{RA|01|57|55.71647}}
| dec={{DEC|+23|35|45.8295}}
| appmag_v=4.79[3] (4.95/7.75)[4]
| constell=Aries
}}{{Starbox character
| class = {{nowrap|F0 V + G1 V}}[4]
| r-i = 0.16
| v-r =
| b-v = +0.28[3]
| u-b = +0.09[3]
| variable=
}}{{Starbox astrometry
| radial_v=-1.4[8]
| prop_mo_ra=-92.55
| prop_mo_dec=-13.25
| parallax=25.32
| p_error=0.30
| parallax_footnote =
| absmag_v=
}}{{Starbox detail
| component1 = λ Ari A
| mass =
| radius =
| luminosity =
| temperature = 7,177[12]
| metal_fe = +0.01[12]
| gravity = 3.88[12]
| rotational_velocity = 107[15]
| age_myr =
| component2 = λ Ari B
| temperature2= 5,929[12]
| metal2_fe = –0.03[12]
| gravity2 = 3.88[12]
}}{{Starbox catalog
| names = 9 Arietis, BD+22 288, HD 11973, HIP 9153, HR 569, SAO 75051, GC 2366, ADS 1563, CCDM 01580+2336.[19]
}}{{Starbox reference
| Simbad=lam+Ari
}}{{Starbox end}}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 {{convert|129|ly|pc|abbr=off|lk=on}} distant from Earth. The pair have a combined apparent visual magnitude of 4.79,[3] 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×.[21]The brighter component is an F-type main sequence star with a visual magnitude of 4.95 and a stellar classification of F0 V.[4] 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.[4] References1. ^1 {{citation | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 |date=February 2007 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R | arxiv=astro-ph/0610785 | postscript=. }}
2. ^1 {{citation | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953GCRV..C......0W | postscript=. }}
3. ^1 2 3 4 {{citation | last1=Johnson | display-authors=1 | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | bibcode=1966CoLPL...4...99J | postscript=. }}
4. ^1 2 3 4 5 6 {{citation | last1=Soubiran | first1=C. | last2=Le Campion | first2=J.-F. | last3=Cayrel de Strobel | first3=G. | last4=Caillo | first4=A. | title=The PASTEL catalogue of stellar parameters | journal=Astronomy and Astrophysics | volume=515 | page=A111 |date=June 2010 | doi=10.1051/0004-6361/201014247 | bibcode=2010A&A...515A.111S | postscript=. |arxiv = 1004.1069 }}
5. ^1 2 3 4 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}
6. ^1 {{citation | first1=Philip S. | last1=Harrington | title=Cosmic Challenge: The Ultimate Observing List for Amateurs | publisher=Cambridge University Press | year=2010 | isbn=0521899362 | page=113 | url=https://books.google.com/books?id=8mQmvT4wpWQC&pg=PA113 }}
7. ^1 {{cite simbad | title=lam Ari | accessdate=2012-08-07 | postscript=. }}
}}References- HR 569
- Image Lambda Arietis
{{Stars of Aries}} 9 : Henry Draper Catalogue objects|Binary stars|Hipparcos objects|Bayer objects|Flamsteed objects|Aries (constellation)|F-type main-sequence stars|HR objects|Durchmusterung objects |