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Name
  EV Lac  
AAVSO UID
000-BCQ-725 (1885 observations)  
Constellation
Lacerta Sequence
J2000.0
22 46 49.73 +44 20 02.4  (341.70721 +44.33400) Search nearby
B1950.0 22 44 39.99 +44 04 35.4
Proper motion
RA: -705.36 mas/yDec: -460.72 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 100.607 -13.069
Other names

(Internal only)
1RXS J224650.7+442008 AAVSO 2242+43 BD+43 4305
G 216-16 GJ 873.0 HIP 112460
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Variability type
UV+BY
Spectral type M4.5Ve
Mag. range
8.28 - 11.83 B
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 GCVS Team VB A (B 12.74mB, 10", 260deg, 1949); mu alpha = -0.065s, mu delta = -0.46". Dark companion (A = 0.0206", P = 45 yr, E = 0.5) [P. van de Kamp, S.L.Lippincott, BAAS 12, 455, 1980.]. In 1979 sinusoidal light oscillations were observed in the range 10.20m - 10.27mV: Min = 2444037.576 + 4.378d*E [B.R.Pettersen, AJ 85, 871, 1980.]. In 1974 - 76 such periodicity was not observed [F.M.Mahmoud, K.Olah, IBVS N1943, 1981.].
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References
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1 B.R.Pettersen, AJ 85, 871, 1980. 1980AJ.....85..871P
2 P.F.Chygajnov, Izv. Krymsk. Astrofiz. Obs. 33, 215, 1965. --
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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 = 6.11H = 5.55K = 5.30J - K = 0.81
Images
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Supporting Documents
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Revision History
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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.