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Details for Revision 2
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Name
  EX Hya  
AAVSO UID
000-BBT-323 (138729 observations)  
Constellation
Hydra Sequence
J2000.0
12 52 24.20 -29 14 56.0  (193.10083 -29.24889) Search nearby
B1950.0 12 49 42.25 -28 58 38.5
Galactic coord. 303.185 +33.622
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J125224.7-291451 2MASS J12522423-2914560 AAVSO 1247-28
Downes EX Hya GSC 06709-00694 HV 10215
X 12492-289    
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Variability type
UGSU+E
Spectral type pec(UG)
Mag. range
9.6 - 13.99 V
Discoverer --
Epoch
--
Outburst --
Period 0.06823 d  (98.25 min)
Rise/eclipse dur. --
Remarks
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1 2009arXiv0910.0954S White dwarf spin period = 4021.62 seconds.
2 GCVS Team Light variations with Porb and amplitude up to 0.9mV due to eclipses of hot spot are represented by the elements: ET(Min) = 2437699.94177 + 0.0682338422d*E, where ET(Min) is the heliocentric Julian Date converted to Ephemeris Time; simultaneously periodic modulation of the shape of the light curve between the outbursts is observed with the amplitude 0.2m - 0.9m and the elements: Max = 2437699.8895 + 0.04654656d*E - 1.2d*10**(-12)*E**2 [C.Sterken, N.Vogt, R.Freeth, H.D. Kennedy, B.F.Marino, A.A.Page, W.S.G.Walker, AsAp 118, 325, 1983.]. Mean interval between bright outbursts is 465d [F.M.Bateson, A.F.Jones, B.Menzies, NZ Circ N159, 1970.], mean cycle is close to 20 - 30d.
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References
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1 S. Scaringi et al., 2009, arXiv:0910.0954v1 [astro-ph.GA] 2009arXiv0910.0954S
2 S. Scaringi et al., 2009, arXiv:0910.0954v1 [astro-ph.GA] 2009arXiv0910.0954S
3 Outbursts of EX Hydrae revisited 2007MNRAS.380..353M
4 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
5 D.W. Hoard, The Big List of SW Sextantis Stars 2003AJ....126.2473H
6 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 2002A&A...382..984E
7 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
8 N.Vogt, F.M.Bateson, AsAp Suppl 48, N3, 383, 1982. 1982A&AS...48..383V
9 F.M.Bateson, A.F.Jones, B.Menzies, NZ Circ N159, 1970. --
10 K. Mukai, The Intermediate Polars --
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Supporting Documents
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
4 Otero, Sebastian Alberto 2011-05-18 00:10 UTC Primary record creation. Orbital period and spectral type from Ritter and Kolb (2010, 2003A&A...404..301R). Range from AAVSO data. Type from reference. UCAC3 position.
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-10-09 02:29 UTC Orbital period from [2009arXiv0910.0954S].
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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