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Name
  V Hya  
AAVSO UID
000-BBR-784 (9935 observations)  
Constellation
Hydra Sequence
J2000.0
10 51 37.25 -21 15 00.3  (162.90521 -21.25008) Search nearby
B1950.0 10 49 11.28 -20 59 04.0
Proper motion
RA: -11.02 +/- 1.14 mas/yDec: 2.29 +/- 1.16 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 268.965 +33.601
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1046-20 ASAS J105137-2115.0 ASASSN-V J105137.36-211501.0
BD-20 3283 HIP 53085 IRC -20218
RAFGL 1439 SAO 179278  
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Variability type
SRA
Spectral type C6,3e-C7,5e(N6e)
Mag. range
6.0 - 12.3 V
Discoverer Seth Chandler (1888)
Epoch
14 Jul 1943 (HJD 2430920.0) Ephemeris
Outburst --
Period 530.7 d
Rise/eclipse dur. 50%  (265 d)
Remarks
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1 Otero, Sebastian Alberto Recent cycles (ASAS-3 data, 2000-2009) show a perod of 519 d.
2 GCVS Team VB A (B 11.58mV, KO III, 46", 186deg). Mean brightness variations with P = 6670d and A = 3.5m are superimposed by light oscillations with A = 1.1m - 2m and elements given in the Table. Deep light minima were observed in 1891, 1908, 1925, 1942 - 43, 1959, and 1962. A graph of the light curve [M.W.Mayall, JRAS Can 59, 245, 1965.].
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References
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1 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
2 K.C.Leung, BAAS 5, N4, part I, 415, 1973. 1973BAAS....5..415L
3 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
External Links
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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 = 1.65H = 0.21K = -0.69J - K = 2.34
AllWISE W4 = -3.44
APASS-DR9 B = 14.06V = 7.60g' = 11.52r' = 6.02B - V = 6.46
GALEX-DR5 FUV = 18.32NUV = 18.81FUV - NUV = -0.49
Images
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Supporting Documents
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1 Historical light curve Otero, Sebastian Alberto 2011-05-10 01:09 UTC Light curve with all V-data available from the literature and visual data from the AAVSO International Database adjusted to the V-magnitude scale.
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Campaigns/Programs
 Binocular program
 LPV Program
 Legacy LPV South
 Percy's Unusual LPVs
Revision History
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4 Fernig, Leo 2022-04-22 13:31 UTC Discoverer updated from 1907AnHar..55....1C page 15
3 Otero, Sebastian Alberto 2011-05-10 01:09 UTC Visual range adopted from the available V-data and AAVSO visual light curve adjusted to the V-mag. scale.
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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