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Name
  U Ori  
AAVSO UID
000-BBK-399 (63343 observations)  
Constellation
Orion Sequence
J2000.0
05 55 49.17 +20 10 30.7  (88.95488 +20.17519) Search nearby
B1950.0 05 52 50.95 +20 10 06.2
Proper motion
RA: -12.12 +/- 1.52 mas/yDec: -6.13 +/- 0.73 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 188.715 -2.492
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 0549+20A ASAS J055549+2010.5 BD+20 11711
HD 39816 HIP 28041 HR 2063
IOMC 1320000037 IRC +20127 RAFGL 837
SAO 77730    
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Variability type
M
Spectral type M6e-M9.5e
Mag. range
4.8 - 13 V
Discoverer --
Epoch
23 Feb 2008 (HJD 2454520) Ephemeris
Outburst --
Period 377 d
Rise/eclipse dur. 38%
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team SiO, OH, H2O maser. P var. Max = 2409881 + 374.5d*E (JD2409800 - 15900); Max = 2415871 + 367.9d*E (JD2415900 - 21000); Max = 2421016 + 376.0d*E (JD2421000 - 29300); Max = 2428164 + 368.3d*E (JD2428100 - 32900) [H.Schneller, GuL 3, 1952.]; Max = 2433336 + 372.7d*E (JD2432900 - 43800); since JD2443800 - see Table.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
2012arXiv1210.0821A
2 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
3 T. Karlsson, Maxima of Mira stars --
4 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
External Links
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Images
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Supporting Documents
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Campaigns/Programs
 Legacy LPV Program
 LPV Program
 LPV Humps
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Otero, Sebastian Alberto 2011-01-13 22:33 UTC Primary record creation. Period and epoch from ASAS-3 data.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.