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Name
W Hya
AAVSO UID
Constellation
J2000.0
B1950.0
13 46 12.22 -28 07 06.7
Proper motion
Galactic coord.
318.022 +32.811
Other names(Internal only)
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Variability type
M
Spectral type
M7e-M9ep
Mag. range
5.6 - 9.6 V
Discoverer
Edwin Sawyer (1889)
Epoch
Outburst
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Period
402 d
Rise/eclipse dur.
50% (201 d)
Remarks
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1
Otero, Sebastian Alberto
2 mag. mean mag. changes on a time scale of 8000 days.
2
GCVS Team
VB A (B 9.3m, 72", 108deg). P var. Max = 2411074 + 379d*E (JD2411000 - 14150); Max = 2414644 + 395d*E (JD2414150 - 19400); Max = 2419746 + 378d*E (JD2419400 - 25200) [R.Prager, GuL 2, 1936.]. Max = 2425740 + 366d*E (JD2425200 - 27000); Max = 2440336 + 397.35d*E (JD2428000 - 40500); since JD2440500 - see Table. Amplitude and shape of the light curve vary strongly. OH, H2O, SiO maser.
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References
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1
Drake, A. J.; et al., 2017, The Catalina Surveys Southern Periodic Variable
2017MNRAS.469.3688D
2
G.Pojmanski, Acta Astronomica 52, 397, 2002.
2002AcA....52..397P
3
Cannon, A. J., 1907, Second catalogue of variable stars
1907AnHar..55....1C
4
General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
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Catalog Data
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Images
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Supporting Documents
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Revision History
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