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Name
  W Del  
AAVSO UID
000-BCM-014 (2502 observations)  
Constellation
Delphinus Sequence
J2000.0
20 37 40.09 +18 17 03.8  (309.41704 +18.28439) Search nearby
B1950.0 20 35 23.41 +18 06 31.1
Proper motion
RA: -3.453 +/- 0.088 mas/yDec: 2.813 +/- 0.068 mas/ySource: Gaia DR1
Galactic coord. 62.035 -13.578
Other names

(Internal only)
AAVSO 2033+17 BD+17 4367 HD 352682
HIP 101780 HV 60 MWC 1024
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Variability type
EA/SD
Spectral type B9.5Ve+G5
Mag. range
9.69 - 12.33 V
Discoverer --
Epoch
04 Jul 1977 (HJD 2443328.5495) Ephemeris
Outburst --
Period 4.8061 d
Rise/eclipse dur. 12%
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team d = 0.017P. Min II 9.79. P var. Since JD2433000 - see Table. The light curve shape var.
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References
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1 A.D.Mallama, ApJ Suppl 44, 241, 1980. 1980ApJS...44..241M
2 Bob Nelson's O-C files, 2016 --
3 CALEB - Catalog and AtLas of Eclipsing Binaries --
4 AAVSO Circ N34, 1973. --
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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 = 9.37H = 9.13K = 9.10J - K = 0.27
AllWISE W1 = 8.95W2 = 8.99W3 = 9.00W1 - W2 = -0.05
APASS-DR9 B = 10.05V = 9.80g' = 10.27r' = 9.87i' = 10.12B - V = 0.25
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.