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Name
  AN UMa  
AAVSO UID
000-BBR-959 (7553 observations)  
Constellation
Ursa Major Sequence
J2000.0
11 04 25.65 +45 03 13.8  (166.10688 +45.05383) Search nearby
B1950.0 11 01 35.51 +45 19 26.1
Proper motion
RA: -28.6 +/- 18.6 mas/yDec: -17.9 +/- 18.6 mas/ySource: UCAC4
Galactic coord. 165.827 +62.148
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J110425.6+450319 2MASS J11042568+4503138 AAVSO 1058+45
Downes AN UMa LINEAR 24080151 PG 1101+453
SDSS J110425.64+450314.0 SON 7738 X 11016+454
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Variability type
AM+E
Spectral type pec(e+cont)
Mag. range
14.5 - 19.3 V
Discoverer --
Epoch
13 Aug 2002 (HJD 2452500.004) Ephemeris
Outburst --
Period 0.07975274 d  (114.84395 min)
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team The epoch of Min for periodic (P = Porb) light variations with A <= 1m B is given. Min II is present. B - V = 0.0 in Max light, +0.5 during an eclipse; U - B = -1.1. Circular polarization in B light -9% to -35%; linear polarization 0% - 13% with a sharp Max near Max light. Rapid changes (A = 0.03m, f = 0.4 - 0.8 Hz). The mean light level and the light curve shape var. During the low state (B ~19m) the light variability with porb disappears, emission lines occur only during 10% of Porb, IR excess is noted. Soft X-ray source, var. Emissions of H, HeI, He II, NIII, FeII.
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References
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1 L. Palaversa, Z. Ivezic, L. Eyer et al., 2013, arXiv:1308.0357
[astro-ph.GA]
2013arXiv1308.0357P
2 B.T. Gaensicke et al., 2009, arXiv:0905.3476v1 [astro-ph.SR] 2009arXiv0905.3476G
3 Light curve from CRTS/CSS (Drake et al. 2009, ApJ, 696, 870) 2009ApJ...696..870D
4 Cyclotron Modeling Phase-Resolved Infrared Spectroscopy of Polars. II. EQ
Ceti, AN Ursa Majoris, and VV Puppis
2008ApJ...678.1304C
5 Szkody P. et al., 2006, AJ 131, 937 2006AJ....131..973S
6 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
7 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
8 G.Williams, ApJ Suppl 53, N3, 523, 1983. 1983ApJS...53..523W
9 S.Yu.Shugarov, Perem. Zvezdy 20, 507, 1978. 1978PZ.....20..507S
10 Bob Nelson's O-C files, 2016 --
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 15.60H = 15.47K = 15.07J - K = 0.53
AllWISE W1 = 14.59W2 = 14.07W3 = 12.11W1 - W2 = 0.52
GALEX-DR5 FUV = 18.08NUV = 18.27FUV - NUV = -0.19
SDSS-DR12 u = 15.37g = 15.44r = 15.60i = 15.70z = 15.63u - g = -0.07r - i = -0.10
Images
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Supporting Documents
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Revision History
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3 Otero, Sebastian Alberto 2011-05-16 14:49 UTC Primary record creation. Type and maximum magnitude from reference. Minimum from AAVSO V-data. Period and Epoch from Kreiner (2004).
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.