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Name
  EY Ori  
AAVSO UID
000-BBJ-492 (2113 observations)  
Constellation
Orion Sequence
J2000.0
05 31 18.41 -05 42 13.5  (82.82671 -5.70375) Search nearby
B1950.0 05 28 51.32 -05 44 23.9
Proper motion
RA: -0.330 +/- 0.116 mas/yDec: -1.761 +/- 0.075 mas/ySource: Gaia DR1
Galactic coord. 208.834 -20.407
Other names

(Internal only)
AN 32.1931 ASASSN-V J053118.39-054213.6 BD-05 1281
HD 36412 HIP 25863 Parenago 662
SAO 132209    
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Variability type
EA/D
Spectral type A7Vm
Mag. range
9.43 - 10.13 V
Discoverer --
Epoch
18 Jan 1978 (HJD 2443527.466) Ephemeris
Outburst --
Period 16.787832 d
Rise/eclipse dur. 6%  (1.0073 d)
Remarks
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1 GCVS Team Min II 9.54; d = 0.003P. In the region of the Orion nebula T-association. P var. Min I = 2427310.420 + 16.787450d*E [S.Gaposchkin, HA 113, N2, 1953.]; since JD2427500 - see Table.
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References
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1 Bob Nelson's O-C files, 2016 --
2 M.M.Zakirov, Perem. Zvezdy 21, N2, 227, 1979. 1979PZ.....21..227Z
3 P.Ahnert, MVS 7, H. 7, 165, 1976. --
External Links
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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 = 7.82H = 7.55K = 7.41J - K = 0.41
AllWISE W1 = 7.29W2 = 7.32W3 = 7.09W4 = 6.63W1 - W2 = -0.03W3 - W4 = 0.46
APASS-DR9 B = 10.19V = 9.41g' = 10.19r' = 9.23i' = 8.95B - V = 0.78
SDSS-DR12 u = 14.66g = 9.98r = 9.23i = 8.93z = 9.96u - g = 4.67r - i = 0.30
Images
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Supporting Documents
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Revision History
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2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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