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  U Sco  
000-BBX-412 (29301 observations)  
Scorpius Sequence
16 22 30.78 -17 52 42.8  (245.62825 -17.87856) Search nearby
B1950.0 16 19 37.55 -17 45 43.5
Galactic coord. 357.669 +21.869
Other names

(Internal only)
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AAVSO 1616-17 BD-17 4554 Downes U Sco
IOMC 6206000010    
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Variability type
Spectral type pec(e)
Mag. range
7.5 - 19.3 V
Discoverer N. R. Pogson
25 Feb 1999 (HJD 2451234.5387) Ephemeris
Outburst 1979
Period 1.23054695 d
Rise/eclipse dur. 16%:  (4.7253 h)
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto Variable eclipse duration.
2 GCVS Team Previous outbursts: 2401646: (1863), 2417343 (1906), 2428342 (1936).
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Click reference title/citation to view in new window. Roll over index number to view submission details.
1 B. Schaefer, 2019, pv. communication. --
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
3 R.J. Strope, B.E. Schaefer, A.A. Henden, 2010, arXiv:1004.3698v1
4 Light curve from CRTS/CSS (Drake et al. 2009, ApJ, 696, 870) 2009ApJ...696..870D
5 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
6 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
7 T.D. Thoroughgood, V.S. Dhillon, S.P. Littlefair, T.R. Marsh, D.A. Smith,
2001, MNRAS 327, 1323
8 M.J.Barlow, J.P.Brodie, C.C. Brunt, D.A.Hanes, P.W.Hill, S.K. Mayo,
J.E.Pringle, M.J.Ward, M.G.Watson, J.A.J.Whelan, A.J. Willis, MN 195, 61,
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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 = 16.79H = 16.39
AllWISE W1 = 13.21W2 = 13.37W3 = 11.42W1 - W2 = -0.16
Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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 Legacy CVs
 BAA VSS Recurrent Objects Programme
Revision History
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6 Otero, Sebastian Alberto 2019-05-09 23:40 UTC Elements from Brad Schaefer (pv. communication).
5 Admin, VSX 2010-04-28 20:57 UTC Update from [2010arXiv1004.3698S].
4 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
3 Admin, VSX 2009-08-27 19:36 UTC Update from [2001MNRAS.327.1323T].
2 Admin, VSX 2007-03-23 15:52 UTC Discoverer added.
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.