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Name
  SZ Hya  
AAVSO UID
000-BBQ-354 (38427 observations)  
Constellation
Hydra Sequence
J2000.0
09 13 48.81 -09 19 08.7  (138.45336 -9.31910) Search nearby
B1950.0 09 11 22.31 -09 06 40.0
Proper motion
RA: 0.271 +/- 0.338 mas/yDec: -44.717 +/- 0.285 mas/ySource: Gaia DR1
Galactic coord. 239.770 +25.934
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1SWASP J091348.80-091908.8 AAVSO 0908-08 ASAS J091349-0919.1
CSS_J091348.7-091909 GSC 05458-00044 HIP 45292
HV 3573 UCAC4 404-047256  
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Variability type
RRAB/BL
Spectral type A7
Mag. range
10.44 - 11.84 V
Discoverer --
Epoch
02 Apr 1970 (HJD 2440679.412) Ephemeris
Outburst --
Period 0.53723 d  (12.894 h)
Rise/eclipse dur. 15%
Remarks
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1 2005IBVS.5655....1W Blazhko period 26.3d.
2 GCVS Team P var. Max = 2415714.1429 + 0.53742815d*E (JD2414700 - 26500) [L.J.Robinson, IBVS N69, 1964.]; Max = 2426410.575 + 0.53736d*E (JD2426400 - 27200) [General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N. Kholopov et al.]; Max = 2431881.5537 + 0.53723051d*E (JD2427880 - 35200) [L.J.Robinson, IBVS N69, 1964.]; Max = 2435542.267 + 0.5372497d*E (JD2435500 - 38900) [G.A.Lange, SAC N38, 1966.]. Since JD2438770 - see Table. Blazhko effect: Max(A) = 2440705 + 25.8d*n [S.Kanyo, IBVS N490, 1970.]; 10.44m <= Max <= 11.03m.
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References
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1 Greer, P. A.; Payne, S. G.; Norton, A. J.; et al., 2017, The SuperWASP
catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect
candidates
2017A&A...607A..11G
2 Drake, A. J.; et al., 2013, RRab stars from Mount Lemmon Survey (MLS) and
Catalina Schmidt Survey (CSS)
2013ApJ...765..154D
3 D.M. Szczygiel, D.C. Fabrycky, 2007, MNRAS 377, 1263 2007MNRAS.377.1263S
4 Wils, P., Sodor, A., 2005, IBVS 5655 2005IBVS.5655....1W
5 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
6 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 1972IBVS..702....1A
7 S.Kanyo, IBVS N490, 1970. 1970IBVS..490....1K
8 V.P.Zessewitsch, Perem. Zvezdy 7, N1, 7, 1949. --
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 = 10.45H = 10.21K = 10.15J - K = 0.30
AllWISE W1 = 10.15W2 = 10.14W3 = 10.11W1 - W2 = 0.01
APASS-DR9 B = 11.86V = 11.49g' = 11.58r' = 11.41i' = 11.28B - V = 0.36
Images
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Supporting Documents
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Revision History
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5 Otero, Sebastian Alberto 2016-05-30 18:47 UTC Update from 2013ApJ...765..154D. UCAC4 position.
4 Admin, VSX 2015-12-18 21:45 UTC Updated variability type to indicate Blazhko effect.
3 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 15:57 UTC Update from [2005IBVS.5655....1W].
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.