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Latest Details
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Name
  X Oph  
AAVSO UID
000-BCC-870 (44723 observations)  
Constellation
Ophiuchus Sequence
J2000.0
18 38 21.13 +08 50 02.8  (279.58804 +8.83411) Search nearby
B1950.0 18 35 57.68 +08 47 20.0
Proper motion
RA: -15.96 +/- 20.54 mas/yDec: 19.69 +/- 16.93 mas/ySource: F. Van Leeuwen, 2007
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
ASASSN-V J183819.77+085106.4 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 Thomas Espin (1886)
Epoch
22 Jun 2015 (HJD 2457196) Ephemeris
Outburst --
Period 332 d
Rise/eclipse dur. 53%  (176 d)
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 T. Jayasinghe, K. Z. Stanek, C. Kochanek, et al., 2019 (in preparation) --
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
3 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
4 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
5 T. Karlsson, Maxima of Mira stars --
6 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.		 --
External Links
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Location    Go   
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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 = 0.53H = -0.36K = -0.82J - K = 1.35
AllWISE W3 = -1.92W4 = -2.93W3 - W4 = 1.01
APASS-DR9 i' = 5.83
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 18 38 21.13 +08 50 02.8 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Campaigns/Programs
 Binocular program
 Legacy LPV Program
 LPV Program
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
6 Otero, Sebastian Alberto 2024-01-18 20:35 UTC Period and epoch from AAVSO data.
5 Fernig, Leo 2022-04-22 13:34 UTC Discoverer updated from 1907AnHar..55....1C page 22
4 Otero, Sebastian Alberto 2014-03-01 06:45 UTC Minimum magnitude from ASAS-3 and AAVSO data.
3 Otero, Sebastian Alberto 2011-01-20 06:03 UTC Primary record creation. Period and epoch from ASAS-3 data.
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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