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Name
  U Mon  
AAVSO UID
000-BBN-215 (52752 observations)  
Constellation
Monoceros Sequence
J2000.0
07 30 47.47 -09 46 36.8  (112.69779 -9.77689) Search nearby
B1950.0 07 28 24.34 -09 40 15.1
Proper motion
RA: -2.59 +/- 0.79 mas/yDec: 3.49 +/- 0.69 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 226.141 +4.154
Other names

(Internal only)
AAVSO 0726-09 BD-09 2085 HD 59693
HIP 36521 RAFGL 1135 SAO 134775
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Variability type
RVB
Spectral type F8eVIb-K0pIb(M2)
Mag. range
5.45 - 7.67 V
Discoverer --
Epoch
10 Apr 1964 (HJD 2438496.00) Ephemeris
Outburst --
Period 91.32 d
Rise/eclipse dur. 22%
Remarks
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1 GCVS Team P var. Min = 2408897 + 92.26d*E (JD2408800 - 36210) [C.Payne-Gaposchkin, V.K.Brenton, S.Gaposchkin, HA 113, N1, 1943.]; since JD2437300 - see Table. Mean magnitude varies with the period 2320d [E.Loreta, AN 267, 397, 1939.]. Spectrum investigation [H.A.Abt, ApJ 122, 72, 1955.].
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References
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1 JBAA 85, N2, 156, 1975. 1975JBAA...85..156I
2 C.Payne-Gaposchkin, V.K.Brenton, S.Gaposchkin, HA 113, N1, 1943. 1943AnHar.113....1P
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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 = 4.92H = 4.27K = 4.04J - K = 0.88
AllWISE W3 = -0.95W4 = -2.43W3 - W4 = 1.48
Images
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Supporting Documents
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1 Light curve Otero, Sebastian Alberto 2011-07-05 19:51 UTC Light curve combining data from the literature and showing the V-range of U Mon.
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Campaigns/Programs
 Binocular program
Revision History
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3 Otero, Sebastian Alberto 2011-07-05 19:51 UTC V-range from the literature.
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.