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Details for Revision 2
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Name
  del Ori  
AAVSO UID
000-BCW-648 (2164 observations)  
Constellation
Orion Sequence
J2000.0
05 32 00.40 -00 17 56.7  (83.00167 -0.29908) Search nearby
B1950.0 05 29 27.04 -00 20 04.3
Galactic coord. 203.856 -17.740
Other names

(Internal only)
34 Ori A del Ori A 1RXS J053200.8-001755
AAVSO 0526-00B ADS 4134 A ALS 14779
BD-00 983 HD 36486 HIP 25930
HR 1851 HR 1852 IRC +00076
SAO 132220 X 05294-003  
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Variability type
EA/DM
Spectral type O9.5II-III+B0III
Mag. range
2.14 - 2.26 V
Discoverer --
Epoch
30 Dec 1978 (HJD 2443872.589) Ephemeris
Outburst --
Period 5.732476 d
Rise/eclipse dur. 13%  (17.89 h)
Remarks
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1 Otero, Sebastian Alberto Range is for the combined brightness of the eclipsing binary and the V= 3.83 companion 0".27 away. Min II V= 2.27. Eccentric system with apsidal motion (per= 201 years) probably caused by the tertiary component. Elements given are for Min I. Elements for Min II= HJD 2448742.21 + 5.73240 x E. Sidereal period 5.732436 d.
2 GCVS Team VB A (A 0.217", 144deg, 1980; B 14.0m, 33.1", 227deg; C 6.84m, 53.5", 359deg). Orion Belt cluster member. Min II 2.20. Apsidal motion (P = 210 yr). Shape of the light curve varies. The intrinsic brightness variability of the components is possible.
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References
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1 Bob Nelson's O-C files, 2016 --
2 Mayer, P., et al., 2010, Physical elements of the eclipsing binary δ
Orionis		 2010A&A...520A..89M
3 R.H.Koch, B.J.Hrivnak, ApJ 248, 249, 1981. 1981ApJ...248..249K
4 W.H.Warren, Jr., J.E.Hesser, ApJ Suppl 34, 115, 1977. 1977ApJS...34..115W
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2012-12-04 04:12 UTC Phase plot combining data published in 2010A&A...520A..89M.
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Revision History
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3 Otero, Sebastian Alberto 2012-12-04 04:12 UTC Elements from all data published in 2010A&A...520A..89M. Range from Hipparcos, GCPD and data in 2010A&A...520A..89M.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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