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Name
  phi Dra  
AAVSO UID
000-BCC-061 (2 observations)  
Constellation
Draco Sequence
J2000.0
18 20 45.43 +71 20 16.1  (275.18929 +71.33781) Search nearby
B1950.0 18 21 28.61 +71 18 42.0
Proper motion
RA: -5.03 +/- 0.43 mas/yDec: 37.86 +/- 0.39 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 101.876 +28.036
Other names

(Internal only)
43 Dra ADS 11311 BD+71 889
HD 170000 HIP 89908 HR 6920
SAO 9084    
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Variability type
ACV
Spectral type A0p(Si)
Mag. range
4.21 - 4.24 V
Discoverer --
Epoch
30 Jun 1974 (HJD 2442229.4) Ephemeris
Outburst --
Period 1.71646 d
Rise/eclipse dur. 60%
Remarks
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1 Hinzel, David H. Triple system. Combined AB magnitude given (A = 4.49V and B = 5.91V). The ACV variable is the Ab component. Aa-Ab period = 127.9902 d.; sep. = 0.011". AB period = 307.8 y.; sep. 1") (2016MNRAS.461..939L).
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References
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1 Liska, J.;, 2016, Analysis of the Multiple System with CP Component φ
Draconis
2016MNRAS.461..939L
2 B.Musielok, D.Lange, W.Schoeneich, G.Hildebrandt, E.Zelwanowa,
A.Hempelmann, G.Salmanov, AN 301, 71, 1980.
1980AN....301...71M
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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 = 4.18H = 4.45K = 4.39J - K = -0.21
AllWISE W1 = 4.42W2 = 4.23W3 = 4.50W4 = 4.47W1 - W2 = 0.20W3 - W4 = 0.03
Images
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Supporting Documents
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Revision History
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3 Hinzel, David H. 2016-12-21 19:24 UTC Range from HIPPARCOS and GCPD data.
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.