AAVSO Home



Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Latest Details
Log in to retrieve additional aliases from SIMBAD.
Name
  EW Lac  
AAVSO UID
000-BCR-002 (1151 observations)  
Constellation
Lacerta Sequence
J2000.0
22 57 04.50 +48 41 02.6  (344.26875 +48.68406) Search nearby
B1950.0 22 54 51.59 +48 24 59.5
Proper motion
RA: 9.43 +/- 0.17 mas/yDec: -4.86 +/- 0.20 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 104.220 -9.988
Other names

(Internal only)
2MASS J22570451+4841026 AAVSO 2252+48 ASASSN-V J225704.39+484103.1
ASCC 367065 BD+47 3985 HD 217050
HIP 113327 HR 8731 MWC 394
SAO 52526 TIC 252500679 TYC 3626-1877-1
WISEA J225704.50+484102.4    
(Not logged in)  Add name
Variability type
GCAS
Spectral type B3III-IVpeV
Mag. range
5.22 - 5.48 V
Discoverer --
Epoch
15 Jul 2015 (HJD 2457218.5986) Ephemeris
Outburst --
Period 0.36171 d  (8.681 h)
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team Non-radial pulsations with P = 0.7d - 0.8d are also possible [N.F.Vojkhanskaya, Astrofizika 12, N12, 219, 1976., J.R.Percy, BAAS 14, 157, 879, 1982.].
(Not logged in)  Add remark
References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 MASCARA Variable star catalogue (online data) 2018arXiv180602247B
2 O. Burggraaff, G.J.J. Talens, J. Spronck et al., 2018, Studying bright
variable stars with the Multi-site All-Sky CAmeRA (MASCARA)		 2018arXiv180602247B
3 M.E.Walker, ApJ 118, 481, 1953. 1953ApJ...118..481W
External Links
Links open in a new window. Not all links may be valid for this particular target.
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 = 5.38H = 5.34K = 5.24J - K = 0.15
AllWISE W1 = 4.95W2 = 4.42W3 = 3.74W4 = 2.85W1 - W2 = 0.54W3 - W4 = 0.89
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 22 57 04.50 +48 41 02.6 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
There are currently no supporting documents on file for this star. (Not logged in)  Add document
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Admin, VSX 2018-08-29 00:25 UTC Update from [2018arXiv180602247B].
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.

Guidelines    FAQ    Manual    Forum    Variability Types    Passbands    Copyright    Acknowledgments    Privacy    Contact    Help us   
The International Variable Star Index
© 2005-2025 American Association of Variable Star Observers (AAVSO)
Version 1.1 [C]
172.30.4.30