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Name
  SW Lac  
AAVSO UID
000-BCQ-919 (28070 observations)  
Constellation
Lacerta Sequence
J2000.0
22 53 41.66 +37 56 18.6  (343.42358 +37.93850) Search nearby
B1950.0 22 51 22.62 +37 40 18.9
Proper motion
RA: 83.866 +/- 0.113 mas/yDec: 10.068 +/- 0.082 mas/ySource: Gaia DR1
Galactic coord. 98.681 -19.326
Other names

(Internal only)
1RXS J225341.8+375617 AAVSO 2249+37 AN 17.1918
BD+37 4717 HD 216598 HIP 113052
HV 3435 SAO 72820  
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Variability type
EW/RS
Spectral type G8Vp+G8Vp
Mag. range
8.51 - 9.49 V
Discoverer --
Epoch
30 Aug 1998 (HJD 2451056.2839) Ephemeris
Outburst --
Period 0.3207152 d  (7.69716 h)
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto Variable amplitude due to spots.In Hipparcos data range was V= 8.66 - 9.45. In three seasons between 2001 and 2003 the total range was V= 8.54 - 9.49 (2004A&A...420.1039A)
2 GCVS Team Min II 9.31. P var. Min I = 2418943.712 + 0.32071236d*E (JD2410000 - 19990); Min I = 2420038.621 + 0.32071510d*E (JD2419990 - 25210); Min I = 2430996.525 + 0.32071665d*E (JD2425210 - 33690); Min I = 2436046.5634 + 0.32072132d*E (JD2433690 - 36755) [A.Purgathofer, F.Prochazka, Wien Mitt 13, N10, 151, 1967.]; Min I = 2437572.5723 + 0.32072811d*E (JD2436755 - 40000) [B.B.Bookmyer, AJ 70, 415, 1965.]; Min I = 2440467.4592 + 0.32072480d*E (JD2440110 - 40500) [I.Semeniuk, AA 21, N1, 49, 1971.]; Min I = 2441249.3737 + 0.3207197d*E (JD2440500 - 41600); [General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N. Kholopov et al.]; Min I = 2442697.4039 + 0.3207144d*E (JD2441600 - 43100) [S.Frasinska, J.M.Kreiner, IBVS N1285, 1977.]; Min I = 2443459.7476 + 0.3207216d*E (JD2443100 - 44400) [D.R.Faulkner, B.B.Bookmyer, IBVS N1503, 1978.]; Min I = 2444856.8064 + 0.3207184d*E (JD2444400 - 44900) [General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N. Kholopov et al.]; since JD2444900 - see Table. Shape of the light curve, depths of minima and heights of maxima vary.
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References
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1 Bob Nelson's O-C files, 2016 --
2 Albayrak, B., et al., 2004, Modeling the changing spot features of SW
Lacertae: A three year study
2004A&A...420.1039A
3 F.W.Wright, HA 89, N10, 1937. 1932AnHar..89..171W
4 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
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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 = 7.21H = 6.82K = 6.70J - K = 0.51
AllWISE W1 = 6.80W2 = 6.80W3 = 6.77W4 = 6.64W1 - W2 = 0.00W3 - W4 = 0.13
APASS-DR9 B = 9.79V = 8.96g' = 9.71r' = 8.67i' = 8.48B - V = 0.83
Images
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Supporting Documents
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Revision History
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3 Otero, Sebastian Alberto 2012-09-16 21:40 UTC Type, period, epoch and minimum magnitude from 2004A&A...420.1039A.
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.