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Latest Details
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| Name |
EX Hya |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
12 49 42.74 -28 58 40.0 |
| Proper motion |
| RA: -122.8 +/- 2.7 mas/y | Dec: 29.7 +/- 1.0 mas/y | Source: UCAC4 |
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| Galactic coord. |
303.185 +33.622 |
Other names
(Internal only)
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Please note that aliases shown in grey link to obsolete records.
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1RXS J125224.7-291451 |
2MASS J12522423-2914560 |
AAVSO 1247-28 |
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Downes EX Hya |
GSC 06709-00694 |
HV 10215 |
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X 12492-289 |
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(Not logged in) Add name
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| Variability type |
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UG/DQ+E |
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| Spectral type |
WD+M5-6V |
| Mag. range |
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10.0 - 14.3 V |
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| Discoverer |
-- |
| Epoch |
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| Outburst |
-- |
| Period |
0.068234 d (98.257 min) |
| Rise/eclipse dur. |
-- |
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Remarks
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Some references may be clicked to view in new window. Roll over index number to view submission details.
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1 |
2009arXiv0910.0954S |
White dwarf spin period = 4021.62 seconds. |
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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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Click reference title/citation to view in new window. Roll over index number to view submission details.
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1 |
S. Scaringi et al., 2009, arXiv:0910.0954v1 [astro-ph.GA] |
2009arXiv0910.0954S |
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2 |
Outbursts of EX Hydrae revisited |
2007MNRAS.380..353M |
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3 |
R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) |
2005JAD....11....2D |
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4 |
D.W. Hoard, The Big List of SW Sextantis Stars |
2003AJ....126.2473H |
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5 |
Catalogue of Stellar Spectral Classifications (Skiff, 2005) |
2002A&A...382..984E |
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R.A. Downes et al., 2001, PASP 113, 764 |
2001PASP..113..764D |
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N.Vogt, F.M.Bateson, AsAp Suppl 48, N3, 383, 1982. |
1982A&AS...48..383V |
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8 |
F.M.Bateson, A.F.Jones, B.Menzies, NZ Circ N159, 1970. |
-- |
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9 |
K. Mukai, The Intermediate Polars |
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External Links
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Location
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Catalog Data
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Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
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2MASS
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J = 12.27 | H = 11.95 | K = 11.69 | J - K = 0.59 |
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AllWISE
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W1 = 11.44 | W2 = 11.18 | W3 = 10.77 | W1 - W2 = 0.26 |
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APASS-DR9
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B = 13.26 | V = 13.25 | g' = 13.15 | r' = 13.17 | i' = 13.13 | B - V = 0.01 |
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Images
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Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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There are currently no supporting documents on file for this star.
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Campaigns/Programs
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Legacy CVs
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Revision History
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Currently approved revision is checked. Click revision number to view details of that revision.
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