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| {{Starbox 2
| | The writer is called Irwin Wunder but it's not the most masucline title out there. To gather cash is a factor that I'm completely addicted to. Hiring is her working day occupation now and she will not change it anytime soon. For years he's been living in North Dakota and his family members enjoys it.<br><br>My page - [http://peak.hosting.bizfree.kr/xe/?document_srl=247364 home std test] |
| | name=α Caeli
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| | image=[[File:Caelum constellation map.png|250px]]
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| | caption=Alpha Caeli is at lower center.
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| | constell=[[Caelum (constellation)|Caelum]]
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| | epoch=[[J2000.0]] ([[International Celestial Reference System|ICRS]])
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| | equinox=[[J2000.0]]
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| | component_a=A
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| | component_b=B
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| | ra_a_h=04
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| | ra_a_m=40
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| | ra_a_s=33.7125
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| | radec_a_footnote=<ref name="hipparcos">{{cite journal
| |
| | author=Perryman, M. A. C. ''et al''
| |
| | title=The HIPPARCOS Catalogue
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| | journal=Astronomy & Astrophysics | volume=323
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| | pages=L49–L52 |date=April 1997
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| | bibcode=1997A&A...323L..49P }}</ref>
| |
| | dec_a_d=–41
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| | dec_a_m=51
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| | dec_a_s=49.509
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| | appmag_v_a=4.456
| |
| | class_a=F2V<ref name="aj132">{{cite journal
| |
| | author=Gray, R. O. | coauthors=''et al''.
| |
| | title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample |date=July 2006
| |
| | journal=The Astronomical Journal | volume=132
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| | issue=1 | pages=161–170 | doi=10.1086/504637 | bibcode=2006AJ....132..161G |arxiv = astro-ph/0603770 }}</ref>
| |
| | b-v_a=+0.34<ref name="clpl4">{{cite journal
| |
| | author=Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, 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 }}</ref>
| |
| | u-b_a=+0.01<ref name="clpl4" />
| |
| | radial_v_a={{nowrap|–0.6 ± 0.9}}<ref>{{cite conference
| |
| | last=Evans | first=D. S.
| |
| | title=The Revision of the General Catalogue of Radial Velocities
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| | booktitle=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | location=University of Toronto
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| | date=June 20–24, 1966 | publisher=Academic Press
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| | bibcode=1967IAUS...30...57E
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| | accessdate=2009-09-24 }}</ref>
| |
| | prop_mo_ra_a=–141.18<ref name="hipparcos" />
| |
| | prop_mo_dec_a=–74.95<ref name="hipparcos" />
| |
| | parallax=49.67
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| | p_error=0.53
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| | parallax_footnote=<ref name="hipparcos" />
| |
| | absmag_v_a=3.39<ref>{{cite journal
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| | last=Reiners | first=A.
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| | title=Rotation- and temperature-dependence of stellar latitudinal differential rotation
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| | journal=Astronomy and Astrophysics| volume=446
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| | issue=1 |date=January 2006
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| | pages=267–277 | doi=10.1051/0004-6361:20053911 | bibcode=2006A&A...446..267R|arxiv = astro-ph/0509399 }}</ref>
| |
| | mass_a=1.48<ref name="aaa418" />
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| | radius_a=1.3<ref name="aaa367" />
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| | temperature_a=6,991<ref name="aj132" />
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| | metal_a=<math>\begin{smallmatrix}\left[\frac{M}{H}\right]\ =\ -0.10\end{smallmatrix}</math><ref name="aj132" />
| |
| | gravity_a=4.01<ref name="aj132" />
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| | rotational_v_a={{nowrap|47.8 ± 2.4}}<ref name="aaa412" />
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| | age_a={{nowrap|0.9 (0.7–1.3) × 10<sup>9</sup>}}<ref name="aaa418" />
| |
| | names='''A''': [[Catalog of Components of Double and Multiple Stars|CCDM]] J04406-4152A, [[Bonner Durchmusterung|CD]]−42°1587, [[Bonner Durchmusterung|CPD]]−42°513, [[Fifth Fundamental Catalogue|FK5]] 1129, GC 5708, [[Gliese-Jahreiss catalogue|Gl]] 174.1 A, [[Gliese-Jahreiss catalogue|GJ]] 9164 A, [[Henry Draper Catalogue|HD]] 29875, [[Hipparcos catalogue|HIP]] 21770, [[Harvard Revised catalogue|HR]] 1502, [[Index Catalogue of Double Stars|IDS]] 04373-4203 A, [[Smithsonian Astrophysical Observatory catalogue|SAO]] 216926.<ref>[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=alf+cae * alf Cae -- Star in double system], database entry, [[SIMBAD]]. Accessed on line November 4, 2009.</ref><br />'''B''': [[Catalog of Components of Double and Multiple Stars|CCDM]] J04406-4152B, [[Bonner Durchmusterung|CD]]−42°1587B, [[Bonner Durchmusterung|CPD]]−42°513B, [[Gliese-Jahreiss catalogue|Gl]] 174.1 B, [[Gliese-Jahreiss catalogue|GJ]] 9164 B, [[Index Catalogue of Double Stars|IDS]] 04373-4203 B.<ref name=sb1 />
| |
| | simbad_a=alf+cae
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| | ra_b_h=04
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| | ra_b_m=40
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| | ra_b_s=34.0
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| | dec_b_d=−41
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| | dec_b_m=51
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| | dec_b_s=51
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| | radec_b_footnote=<ref name=sb1 />
| |
| | prop_mo_ra_b=−147<ref name=sb1 />
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| | prop_mo_dec_b=−78<ref name=sb1 />
| |
| | class_b=M0.5<ref name=sb1 />
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| | radial_v_b=−0.6 ± 0.9<ref name=sb1 />
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| | appmag_v_b= 12.5<ref name=sb1 />
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| | radec_b_footnote=<ref name=sb1>[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=alf+cae+b GJ 174.1 B -- Flare Star], database entry, [[SIMBAD]]. Accessed on line November 5, 2009.</ref>
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| | mass_b=0.3<ref name=kaler>[http://stars.astro.illinois.edu/sow/alphacae.html Alpha Cae], ''Stars'', Jim Kaler. Accessed on line November 5, 2009.</ref>
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| | temperature_b=3800<ref name=kaler />
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| | simbad_b=alf+cae+b
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| }}
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| '''Alpha Caeli''' (α Cae, α Caeli) is a [[double star]] system in the [[constellation]] [[Caelum]].
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| | |
| Alpha Caeli A is an [[F-type main sequence star]] with a [[stellar classification]] of F2V and an [[apparent magnitude]] of +4.44. It has 1.48 times the [[solar mass|mass of the Sun]]<ref name="aaa418" /> and 1.3 times the [[solar radius]].<ref name="aaa367">{{cite journal
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| | author=Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A.
| |
| | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics
| |
| | journal=Astronomy and Astrophysics | volume=367
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| | issue=2
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| | pages=521–524 |date=February 2001
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| | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P|arxiv = astro-ph/0012289 }}</ref> The [[stellar rotation|projected rotational velocity]] at the stellar equator is 47.8 km/s.<ref name="aaa412">{{cite journal
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| | author=Reiners, A.; Schmitt, J. H. M. M.
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| | title=Differential rotation in rapidly rotating F-stars
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| | journal=Astronomy and Astrophysics | volume=412
| |
| | issue=3
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| | pages=813–819 |date=December 2003
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| | doi=10.1051/0004-6361:20034255 | bibcode=2003A&A...412..813R|arxiv = astro-ph/0309616 }}</ref> It is suspected of being a [[Delta Scuti variable]] star.<ref>{{cite journal
| |
| | last=Petit | first=M. |date=November 1977
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| | title=Etoiles Proches Suspectees de Variabilite
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| | journal=Information Bulletin on Variable Stars
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| | volume=1362 | pages=1–3
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| | bibcode=1977IBVS.1362....1P
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| | accessdate=2009-09-24 }}</ref>
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| The companion is a spectral class M0.5V [[red dwarf]] star with [[absolute magnitude]] 9.80.<ref>{{cite journal
| |
| | author=Hawley, Suzanne L.; Gizis, John E.; Reid, Neill I. | title=Erratum: The Palomar/MSU Nearby Star Spectroscopic Survey.II.The Southern M Dwarfs and Investigation of Magnetic Activity
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| | journal=Astronomical Journal | volume=113
| |
| | page=1458 |date=April 1997
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| | doi=10.1086/118363 | bibcode=1997AJ....113.1458H}}</ref> It is a [[UV Ceti variable]] star that undergoes random increases in luminosity.<ref>{{cite journal
| |
| | author=Gershberg, R. E. | coauthors=''et al''.
| |
| | title=Catalogue and bibliography of the UV Cet-type flare stars and related objects in the solar vicinity |date=November 1999
| |
| | journal=Astronomy and Astrophysics Supplement
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| | volume=139
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| | issue=3 | pages=555–558
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| | doi=10.1051/aas:1999407 | bibcode=1999A&AS..139..555G }}</ref> This star is currently separated from the primary by an angle of 6.6 [[arcsecond]]s, which indicates an orbit with a [[semimajor axis]] whose expected value is 206 [[astronomical unit|AU]].<ref>{{cite journal
| |
| | author=Poveda, A. | coauthors=''et al''.
| |
| | title=Statistical studies of visual double and multiple stars. II. A catalogue of nearby wide binary and multiple systems |date=April 1994
| |
| | journal=Revista Mexicana Astronomía y Astrofísica
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| | volume=28 | issue=1 | pages=43–89
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| | bibcode=1994RMxAA..28...43P
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| | accessdate=2009-09-24 }}</ref>
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| | |
| Alpha Caeli is approximately 65.7 [[light years]] from [[Earth]] and is an estimated 900 million years old. The [[Space velocity (astronomy)|space velocity]] components of this system are U = 10, V = 6 and W = -10 km/s. It is orbiting the [[Milky Way]] galaxy at an average distance of 8.006 kpc from the core and with an [[orbital eccentricity]] of 0.07. This orbit lies close to the galactic plane, and the system travels no more than 0.05 kpc above or below this plane.<ref name="aaa418">{{cite journal
| |
| | last=Holmberg | first=J. | coauthors=''et al''.
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| | title=The Geneva-Copenhagen survey of the Solar neighbourhood II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk
| |
| | journal=Astronomy and Astrophysics | volume=475
| |
| | issue=2
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| | pages=519–537 |date=November 2007
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| | doi=10.1051/0004-6361:20077221 | bibcode=2007A&A...475..519H |arxiv = 0707.1891 }} See the [http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-out.add=.&-source=V/117A/newcat&recno=3027 entry for HIP 21770] in the [[VizieR]] table with [[Centre de Données astronomiques de Strasbourg|CDS]] ID [http://vizier.cfa.harvard.edu/viz-bin/Cat?V/117A V/117A].</ref> Alpha Caeli is probably a member of the [[Ursa Major moving group]] of stars that have similar kinematic properties and probably originated from the same [[star cluster]].<ref>{{cite journal
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| | author=King, Jeremy R. | coauthors=''et al''.
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| | title=Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group
| |
| | journal=The Astronomical Journal | volume=125
| |
| | issue=4 | pages=1980–2017 |date=April 2003 | doi=10.1086/368241 | bibcode=2003AJ....125.1980K }}</ref>
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| | |
| ==References==
| |
| {{reflist|2}}
| |
| {{Nearest bright star systems|7.}}
| |
| {{Stars of Caelum}}
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| [[Category:Bayer objects|Caeli, Alpha]]
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| [[Category:Caelum (constellation)]]
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| [[Category:F-type main-sequence stars]]
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| [[Category:Henry Draper Catalogue objects|29875]]
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| [[Category:Hipparcos objects|021770]]
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| [[Category:Durchmusterung objects|CD-42 1587]]
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| [[Category:Binary stars]]
| |