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Name
  lam Sco  
AAVSO UID
000-BFL-379 (1 observation)  
Constellation
Scorpius Sequence
J2000.0
17 33 36.52 -37 06 13.8  (263.40217 -37.10383) Search nearby
B1950.0 17 30 12.70 -37 04 09.7
Proper motion
RA: -8.53 +/- 1.08 mas/yDec: -30.80 +/- 0.62 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 351.744 -2.214
Other names

(Internal only)
35 Sco 1RXS J173336.7-370604 CD-37 11673
CPD-37 7265 HD 158926 HIP 85927
HR 6527 SAO 208954 X 17401-391
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Variability type
BCEP+EA
Spectral type B1.5IV+PMS+B2IV
Mag. range
1.59 - 1.65 V
Discoverer --
Epoch
23 May 1968 (HJD 2440000.1235) Ephemeris
Outburst --
Period 0.213702 d  (5.1288 h)
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Close eclipsing binary made up of a B1.5IV primary (the A component) and a pre-main sequence star (PMS; Aa component). Ephemeris using Hipparcos data: HJD 2448165.687 + 5.9525 x E. Also a constant B2IV star (component B) in a 1053 d. orbit with the close A pair. Combined light given. (Aa is V= 2.1 and B is V= 2.75)
2 GCVS Team SB1. Porb = 5.6d? Apuls = 0.02m. Long period light changes: Max = 2440376.15 + 10.1605d*E [N.R.Lomb, R.R.Shobbrook, MN 173, 709, 1975.]. One eclipse was found (JD2440690, A ~0.04m) [R.R.Shobbrook, N.R.Lomb, MN 156, 181, 1972.].
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References
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1 Orbital elements, masses and distance of λ Scorpii A and B 2006MNRAS.370..884T
2 E.Chapellier, AsAp 147, N1, 135, 1985. 1985A&A...147..135C
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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 = 2.01H = 2.07K = 2.11J - K = -0.10
AllWISE W3 = 2.57W4 = 2.42W3 - W4 = 0.14
Images
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Supporting Documents
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1 Lambda Scorpii lightcurves Otero, Sebastian Alberto 2007-05-16 19:42 UTC Lightcurves showing the eclipses and the BCEP variations of the triple system lambda Scorpii using Hipparcos data.
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Campaigns/Programs
 BRITE campaign
Revision History
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2 Otero, Sebastian Alberto 2007-05-16 19:42 UTC Hipaprcos position and lightcurves used.
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.