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Name
X Oph
AAVSO UID
Constellation
J2000.0
B1950.0
18 35 57.68 +08 47 20.0
Proper motion
Galactic coord.
39.350 +6.904
Other names(Internal only)
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Variability type
M
Spectral type
M5e-M9e
Mag. range
5.9 - 8.6 V
Discoverer
Thomas Espin (1886)
Epoch
Outburst
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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,
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
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6
General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
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Location
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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 = 0.53 H = -0.36 K = -0.82 J - K = 1.35
AllWISE
W3 = -1.92 W4 = -2.93 W3 - W4 = 1.01
APASS-DR9
i' = 5.83
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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