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Name
  TW Dra  
AAVSO UID
000-BBW-295 (7867 observations)  
Constellation
Draco Sequence
J2000.0
15 33 51.06 +63 54 25.7  (233.46275 +63.90714) Search nearby
B1950.0 15 33 07.14 +64 04 22.6
Proper motion
RA: 11.466 +/- 0.176 mas/yDec: 22.393 +/- 0.181 mas/ySource: Gaia DR1
Galactic coord. 99.067 +44.968
Other names

(Internal only)
1RXS J153350.2+635440 AAVSO 1532+64 ADS 9706 A
AN 88.1910 BD+64 1077 HD 139319
HIP 76196 HV 3274 SAO 16767
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Variability type
EA/SD
Spectral type A8V+K0III
Mag. range
8.0 - 10.5 p
Discoverer --
Epoch
19 Sep 1979 (HJD 2444136.295) Ephemeris
Outburst --
Period 2.806847 d
Rise/eclipse dur. 17%
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team ADS 9706 A (B 9.5m vis, 23deg, 3.6"). d = 0.02P; Min II 8.1. P var. Min I = 2433888.452 + 2.806870d*E (JD2433000 - 40000) [R.Rudolph, BAV-R 16, N1, 6, 1967.]; since JD2440000 - mean elements in the Table.
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References
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1 J.Tremko, J.M.Kreiner, BAC 32, N4, 242, 1981. 1981BAICz..32..242T
2 Bob Nelson's O-C files, 2016 --
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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 = 6.50H = 6.28K = 6.15J - K = 0.35
AllWISE W1 = 6.15W2 = 6.06W3 = 6.18W4 = 6.15W1 - W2 = 0.09W3 - W4 = 0.03
SDSS-DR12 u = 12.20g = 7.85r = 10.85i = 10.39z = 9.47u - g = 4.35r - i = 0.46
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.