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Name
  RR Lac  
AAVSO UID
000-BCQ-631 (1181 observations)  
Constellation
Lacerta Sequence
J2000.0
22 41 26.50 +56 25 58.0  (340.36042 +56.43278) Search nearby
B1950.0 22 39 26.86 +56 10 15.5
Galactic coord. 105.639 -2.011
Other names

(Internal only)
AAVSO 2237+55 AN 133.1907 BD+55 2789
HD 240024 HIP 112026 HV 2987
SAO 34699    
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Variability type
DCEP
Spectral type F6-G2
Mag. range
8.38 - 9.3 V
Discoverer --
Epoch
30 Dec 1975 (HJD 2442776.686) Ephemeris
Outburst --
Period 6.416243 d
Rise/eclipse dur. 30%  (46.20 h)
Remarks
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1 GCVS Team P var. Max = 2419434.331 + 6.416146d*E (JD2417900 - 31600); since JD2431600 - see Table. [A/H] = 0.0.
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References
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1 L.Szabados, Bud Mitt N76, 1980. 1980CoKon..76....1S
2 C.Payne, HB N883, 1931. --
3 Dunér, N. C.; Hartwig, E.; Muller, G., 1908, Benennung von neu entdeckten
veränderlichen Sternen		 1908AN....179...85D
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Supporting Documents
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Stellar Association Membership
 ASCC 123 Open Cluster 2012A&A...548A..97Z
Revision History
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3 Fernig, Leo 2022-09-21 20:30 UTC Discoverer updated from 1908AN....179...85D p92
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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