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Name
  X Oph  
AAVSO UID
000-BCC-870 (38665 observations)  
Constellation
Ophiuchus Sequence
J2000.0
18 38 21.13 +08 50 02.8  (279.58804 +8.83411) Search nearby
B1950.0 18 35 57.63 +08 47 21.0
Galactic coord. 39.350 +6.904
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1833+08 ADS 11524 A ASAS J183821+0850.0
BD+08 3780 HD 172171 HIP 91389
HR 7002 IOMC 1025000024 IRC +10366
RAFGL 2213 SAO 123744  
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Variability type
M
Spectral type M5e-M9e
Mag. range
5.9 - 8.6 V
Discoverer --
Epoch
16 Apr 2005 (HJD 2453477) Ephemeris
Outburst --
Period 338
Rise/eclipse dur. 53%
Remarks
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1 Otero, Sebastian Alberto VSP Note: 8.7 Vmag. companion 0.5" away. Amplitude is reduced.
2 GCVS Team VBA (A = 0.34", Porb = 485.3 yr; B - 9m, K1III, 0.4", 142deg, 1980). The range of the combined brightness is given. P var. Max = 2416416 + 336.61d*E (JD2416400 - 26000); Max = 2426161 + 331.28d*E (JD2426000 - 32500); Max = 2432788 + 335.50d*E (JD2432500 - 38000); since JD2438000 - see Table.
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References
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1 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
2012arXiv1210.0821A
2 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
3 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
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Images
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Supporting Documents
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Campaigns/Programs
 Binocular program
 Legacy LPV Program
 LPV Program
Revision History
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4 Otero, Sebastian Alberto 2014-03-01 01:45 UTC Minimum magnitude from ASAS-3 and AAVSO data.
3 Otero, Sebastian Alberto 2011-01-20 01:03 UTC Primary record creation. Period and epoch from ASAS-3 data.
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.