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Name
  EO Dra  
AAVSO UID
000-BCV-869 (475 observations)  
Constellation
Draco Sequence
J2000.0
18 20 54.89 +50 31 43.4  (275.22871 +50.52872) Search nearby
B1950.0 18 19 41.96 +50 30 15.5
Proper motion
RA: -2.5 +/- 1.9 mas/yDec: -16.7 +/- 2.1 mas/ySource: UCAC4
Galactic coord. 78.759 +25.285
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1818+50 IRC +50278 NSV 10701
NSVS J1820549+503141 StM 430  
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Variability type
M
Spectral type M7
Mag. range
10.8 - 13.0 p
Discoverer --
Epoch
13 Sep 2007 (HJD 2454357.1) Ephemeris
Outburst --
Period 374.1 d
Rise/eclipse dur. --
Remarks
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1 Admin, VSX HD 234624 and the red variable EO Dra are mixed up in SIMBAD, probably due to mis-attribution in the original IRC catalogue. HD 234624 is not EO Dra. VO Dra = GSC 3533-1916, and HD 234624 = GSC 3533-1799. Skiff B., private communication.
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References
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1 C. Yesilyaprak, S.K. Yerli, B.B. G├╝csav, 2012, NewA 17, 504 2012NewA...17..504Y
2 P.R. Wozniak, S.J. Williams, W.T. Vestrand, V. Gupta, AJ 128, 2965, 2004 2004AJ....128.2965W
3 Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016) 1986ApJ...301..927S
4 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 1986ApJ...301..927S
5 S.Wyckoff, P.Wehinger, PASP 86, No.512, 464, 1974. 1974PASP...86..464W
6 M.Collins, The Astronomer 28, No.332, 182, 1991. --
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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 = 4.96H = 3.95K = 3.22J - K = 1.74
AllWISE W3 = 0.57W4 = -0.24W3 - W4 = 0.81
Images
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Supporting Documents
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Revision History
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4 Admin, VSX 2017-12-15 08:10 UTC Spectral type from Skiff (VizieR on-line data: B/mk)
3 Admin, VSX 2012-06-06 20:57 UTC Update from [2012NewA...17..504Y].
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.