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  AO Psc  
000-BCQ-950 (70484 observations)  
Pisces Sequence
22 55 17.94 -03 10 40.3  (343.82475 -3.17786) Search nearby
B1950.0 22 52 43.12 -03 26 41.3
Galactic coord. 68.672 -53.343
Other names

(Internal only)
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1RXS J225518.1-031040 2MASS J22551798-0310399 AAVSO 2250-03
Downes AO Psc GSC 05238-00223 X 22527-034
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Variability type
Spectral type pec(e+cont)
Mag. range
13.2 - 13.59 V
Discoverer --
29 Jul 1981 (HJD 2444815.0674) Ephemeris
Outburst --
Period 0.1496263 d  (3.59103 h)
Rise/eclipse dur. 29%  (1.041 h)
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1 GCVS Team Epoch of Max brightness is given. Light variations with Porb = 0.1496263d are superimposed by variations with P = 858.6861s and twice smaller amplitude (Max = 2444815.00276 + 0.009938496d*E; M-m = 0.54P), and also by still smaller oscillations with P = 805.2059s (Max = 2444815.00294 + 0.009319513d*E). The last period is the X-ray impulse period which is equal to the period of rotation of the compact object (probably a white dwarf).
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1 Gaia Collaboration; et al., 2018, Gaia Data Release 2. Summary of the
contents and survey properties
2 Light curve from CRTS/CSS (Drake et al. 2009, ApJ, 696, 870) 2009ApJ...696..870D
3 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
4 D.W. Hoard, The Big List of SW Sextantis Stars 2003AJ....126.2473H
5 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
6 H.van der Woerd, M.de Kool, J.van Paradijs, AsAp 131, 137, 1984. 1984A&A...131..137V
7 R.E.Griffiths, D.Q.Lamb, M.J.Ward, A.S.Wilson, P.A.Charles, J.Thorstensen,
I.M.McHardy, A.Lawrence, MN 193, N2, 25P, 1980.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
4 Otero, Sebastian Alberto 2020-05-14 20:53 UTC Gaia DR2 position.
3 Otero, Sebastian Alberto 2011-05-24 21:05 UTC Primary record creation. Type from Downes (2001). Range from ASAS-3, Downes, AAVSO and CRTS/CSS data. UCAC3 position.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.