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Latest Details
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Name
  S Lac  
AAVSO UID
000-BCQ-468 (13091 observations)  
Constellation
Lacerta Sequence
J2000.0
22 29 00.91 +40 18 55.9  (337.25379 +40.31553) Search nearby
B1950.0 22 26 49.29 +40 03 33.6
Proper motion
RA: -7.631 +/- 0.070 mas/yDec: -3.468 +/- 0.064 mas/ySource: Gaia DR1
Galactic coord. 95.589 -14.875
Other names

(Internal only)
AAVSO 2224+39 ASASSN-V J222900.88+401855.9 BD+39 4851
HD 213191 HIP 110972 HV 16
IRC +40512 RAFGL 5691S SAO 52048
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Variability type
M
Spectral type M4e-M8.2e
Mag. range
7.6 - 13.9 V
Discoverer Williamina Fleming (1891)
Epoch
22 Oct 1978 (HJD 2443804) Ephemeris
Outburst --
Period 241.5 d
Rise/eclipse dur. 46%  (111 d)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team P var. Max = 2412857 + 238.2d*E (JD2410000 - 16400); Max = 2418828 + 241.45d*E (JD2416400 - 20500); Max = 2427307 + 242.7d*E (JD2420500 - 27300); Max = 2437290 + 237.4d*E (JD2427300 - 37300); since JD2437300 - see Table.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
2 T. Karlsson, Maxima of Mira stars --
3 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.		 --
External Links
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Location    Go   
Select a Location for more details.
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 = 3.56H = 2.87K = 2.26J - K = 1.30
AllWISE W3 = 0.57W4 = 0.15W3 - W4 = 0.42
APASS-DR9 B = 11.64V = 10.04g' = 10.97r' = 9.78i' = 7.37B - V = 1.60
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 22 29 00.91 +40 18 55.9 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Stellar Association Membership
 ASCC 122 Open Cluster 2012A&A...548A..97Z
Campaigns/Programs
 LPV Program
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Fernig, Leo 2022-04-22 13:37 UTC Discoverer updated from 1907AnHar..55....1C page 31
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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