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Name
  U Oph  
AAVSO UID
000-BBY-766 (5617 observations)  
Constellation
Ophiuchus Sequence
J2000.0
17 16 31.72 +01 12 38.0  (259.13217 +1.21056) Search nearby
B1950.0 17 13 59.43 +01 15 53.1
Proper motion
RA: -3.940 +/- 0.030 mas/yDec: -12.543 +/- 0.024 mas/ySource: Gaia DR1
Galactic coord. 22.735 +21.572
Other names

(Internal only)
AAVSO 1711+01 ADS 10428 A BD+01 3408
HD 156247 HIP 84500 HR 6414
SAO 122226    
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Variability type
EA/DM
Spectral type B5V+B5V
Mag. range
5.84 - 6.56 V
Discoverer --
Epoch
25 Jun 1980 (HJD 2444416.3864) Ephemeris
Outburst --
Period 1.67734617 d
Rise/eclipse dur. 16%
Remarks
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1 GCVS Team ADS 10428 A (B 12.26m, GOV, 20.4", 358deg). Min II 6.46. P var. Periodic term: +0.0120d*sin(0.0483deg*E + 4.7833deg).
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References
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1 J.S. Nichols et al., 2010, ApJS 188, 473 (online data) 2010ApJS..188..473N
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 = 5.66H = 5.72K = 5.74J - K = -0.08
AllWISE W1 = 5.92W2 = 5.79W3 = 5.93W4 = 5.70W1 - W2 = 0.13W3 - W4 = 0.23
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.