U Geminorum

U Geminorum
AAVSOs ljudkurva över U Geminorums utbrott. Dagarna är noterade med julianska datum.
AAVSOs ljudkurva över U Geminorums utbrott. Dagarna är noterade med julianska datum.
Observationsdata
Epok: J2000.0
StjärnbildTvillingarna
Rektascension07t 55m 05,24s
Deklination+22° 00′ 05,1″[1]
Skenbar magnitud ()+8,2 (maximum), 14,9 (minimum) [2]
Stjärntyp
Spektraltypsd:Be+[1]
VariabeltypKataklysmisk variabel av typen dvärgnova (UGSS+E) [1]
Astrometri
Radialhastighet ()42 km/s
Egenrörelse (µ)RA: -26 mas/år
Dek.: -32 mas/år
Parallax ()7,9±5,4
Andra beteckningar
EXSS 0752.1+2207, PLX 1870.00, Ton 842, 1AXG J075506+2200, GCRV 59196, PM J07550+2200, 2XMM J075505.1+220004, BD+22 1807, HD 64511, 1RXS J075505.1+220008, XSS J07550+2152, 1E 0752.1+2208, H 0751+22, SBC7 325, BM83 X0752+221, 2E 1889, H 0754+22, SBC9 483, TSA98 J075506.05+220004.22, 2E 0752.1+2208, 2MASS J07550523+2200050, SDSS J075505.20+220004.9, AAVSO 0749+22, EM CDS 707, PLX 1870, TD1 11278[3]

U Geminorum är en kataklysmisk variabel av typen dvärgnova i stjärnbilden Tvillingarna. Stjärnan varierar mellan magnitud +8,2 och 14,9 och är en av prototyperna för gruppen dvärgnovor.[4][1]

Se även

Referenser

  1. ^ [a b c d] ”U Gem” (på engelska). The International Variable Star Index. AAVSO – American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=14298. Läst 16 februari 2016. 
  2. ^ Downes, Ronald A.; Webbink, Ronald F.; Shara, Michael M.; Ritter, Hans; Kolb, Ulrich; Duerbeck, Hilmar W. (2001). ”A Catalog and Atlas of Cataclysmic Variables: The Living Edition” (på engelska). The Publications of the Astronomical Society of the Pacific. http://archive.stsci.edu/prepds/cvcat/query_processor.cgi?setup_file=varcat.setup.cgi&query_decision=single_record&uid=6911&query_select=everything. Läst 16 februari 2016. 
  3. ^ ”Basic data: V* U Gem – Dwarf Novae” (på engelska). Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=U+Gem&submit=SIMBAD+search. Läst 16 februari 2016. 
  4. ^ Samus N.N., Durlevich O.V., Kazarovets E V., Kireeva N.N., Pastukhova E.N., Zharova A.V. med flera. ”General Catalogue of Variable Stars, 4th Edition, Volumes I-III” (på engelska). http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=U+Gem. Läst 16 februari 2016. 

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