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Name
  XY Leo  
AAVSO UID
000-BCZ-838 (2801 observations)  
Constellation
Leo Sequence
J2000.0
10 01 40.43 +17 24 32.7  (150.41846 +17.40908) Search nearby
B1950.0 09 58 55.97 +17 39 04.2
Proper motion
RA: 57.89 +/- 1.92 mas/yDec: -57.10 +/- 1.00 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 217.797 +49.741
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J100140.5+172436 AAVSO 0956+17 AN 356.1934
ASAS J100140+1724.5 ASAS J100141+1724.5 BD+18 2307
HIP 49136    
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Variability type
EW/KW
Spectral type K0V+K0
Mag. range
9.45 - 9.93 V
Discoverer --
Epoch
04 Apr 2003 (HJD 2452733.6048) Ephemeris
Outburst --
Period 0.284101 d  (6.8184 h)
Rise/eclipse dur. --
Remarks
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1 GCVS Team Min II 9.80. P var. Min = 2435195.66306 + 0.2841091d*E (JD2434000 - 36500) [R.H.Koch, AJ 65, N6, 374, 1960.]; Min = 2437376.465 + 0.28409592d*E (JD2436500 - 40000) [General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N. Kholopov et al.]; Min = 2441005.5364 + 0.28410727d*E (JD2441000 - 44000) [SAC N54, 1982.]; since JD2444000 - see Table. The light curve shape var.
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References
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1 Bob Nelson's O-C files, 2016 --
2 M. Kiraga, 2012, Acta Astronomica 62, 67 2012AcA....62...67K
3 R. Diethelm, 2010, IBVS 5945 2010IBVS.5945....1D
4 S. Deb, H.P. Singh, 2010, arXiv:1011.2574v1 [astro-ph.SR] 2010arXiv1011.2574D
5 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
6 J.Kaluzny, G.Pojmanski, AA 33, N2, 277, 1983. 1983AcA....33..277K
7 N.E.Kurochkin Perem. Zvezdy 6, N6, 303, 1949. 1949PZ......6..303K
External Links
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Location    Go   
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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 = 7.69H = 7.15K = 6.99J - K = 0.70
AllWISE W1 = 6.89W2 = 6.96W3 = 6.88W4 = 6.71W1 - W2 = -0.07W3 - W4 = 0.17
APASS-DR9 B = 10.68g' = 10.31i' = 10.15
GALEX-DR5 FUV = 19.34NUV = 16.45FUV - NUV = 2.90
SDSS-DR12 u = 12.88g = 10.62r = 9.56i = 9.21z = 10.14u - g = 2.26r - i = 0.35
Images
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Supporting Documents
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Revision History
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4 Admin, VSX 2010-11-12 23:26 UTC Update from [2010arXiv1011.2547D].
3 Admin, VSX 2010-08-03 23:13 UTC Update from [2010IBVS.5945....1D].
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.