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Details for Revision 3
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Name
  EK Dra  
AAVSO UID
000-BDQ-398 (1813 observations)  
Constellation
Draco Sequence
J2000.0
14 39 00.21 +64 17 30.0  (219.75088 +64.29167) Search nearby
B1950.0 14 37 55.41 +64 30 22.1
Galactic coord. 105.516 +49.040
Other names

(Internal only)
1RXS J143859.9+641731 2RXS J143900.3+641730 BD+64 1017
GJ 559.1 HD 129333 HIP 71631
SAO 16453    
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Variability type
BY
Spectral type F8
Mag. range
8.15 (0.09) B
Discoverer --
Epoch
31 Aug 1991 (HJD 2448500.084) Ephemeris
Outburst --
Period 2.78791 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Visual binary with a period of 45 yrs. (2012A&A...546A..69M) and sep. 0.05-0.5".
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References
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1 Malkov, O. Yu.; et al., 2012, Dynamical masses of a selected sample of
orbital binaries
2012A&A...546A..69M
2 Strassmeier, K. G., 2009, Starspots 2009A&ARv..17..251S
3 The Hipparcos and Tycho Catalogues, Variability Annex: Periodic variables,
1997
1997HIP...C......0E
4 The Hipparcos and Tycho Catalogues, Variability Annex: Periodic variables,
1997
1997HIP...C......0E
5 N.M.Elias II, J.D.Dorren, AJ 100, No.3, 818, 1990. 1990AJ....100..818E
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Supporting Documents
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Revision History
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4 Otero, Sebastian Alberto 2022-12-15 00:55 UTC Type from spectral type. Spectral type from 2009A&ARv..17..251S. Maximum magnitude from GCPD data. Minimum magnitude derived from Hipparcos data.
3 Admin, VSX 2012-03-15 03:47 UTC Update from [1997HIP...C......0E].
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.