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Details for Revision 2
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Name
  alf Vir  
AAVSO UID
000-BBT-601 (No observations)  
Constellation
Virgo Sequence
J2000.0
13 25 11.58 -11 09 40.8  (201.29825 -11.16133) Search nearby
B1950.0 13 22 33.08 -10 54 07.3
Galactic coord. 316.112 +50.845
Other names

(Internal only)
67 Vir BD-10 3672 HD 116658
HIP 65474 HR 5056 IRC -10286
RAFGL 1622 SAO 157923  
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Variability type
ELL+BCEP
Spectral type B1III-IV+B2V
Mag. range
0.95 (0.1) V
Discoverer --
Epoch
07 May 1912 (HJD 2419530.49) Ephemeris
Outburst --
Period 4.014604
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Eclipse amplitude is less than 0.01 mag. Ellipsoidal variability, 0.03 mag.
2 GCVS Team The Table gives the epoch of Min for the ellipsoidal variability and Porb. The depth of Min II up to 0.08m. SB 2. e = 0.205 +- 0.004. Apsidal motion: Pi = 108a +- 5a. Pulsations: P var, P = 0.17378587d (1908 - 1956); since 1956 Max = 2445405.63 + 0.17378680d*E [E.Chapellier, J.C.Valtier, J.P. Sareyan, J.M.Le Contel, D.Ducatel, P.J.Morel, AsAp 143, N2, 466, 1985.]. A var. 3 companions according to lunar occultation observations: 3.1m, 0.0025"; 4.5m, 0.05"; 7.5m, 0.5". Soft X-ray source, LX/Lbol = 2.9*10**(-8).
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References
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1 MOST reveals Spica as an Eclipsing Binary 2009AIPC.1170..376D
2 D.G.Monet, ApJ 237, 513, 1980. 1980ApJ...237..513M
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Revision History
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3 Otero, Sebastian Alberto 2010-02-02 21:29 UTC Type changed to eclipsing binary according to reference.
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.