AAVSO Home



Current Time: 12 Apr 2025 22:28:38 UTC
 Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Latest Details
Log in to retrieve additional aliases from SIMBAD.
Name
  V2331 Cyg  
AAVSO UID
000-BDQ-016 (937 observations)  
Constellation
Cygnus Sequence
J2000.0
21 11 13.60 +34 19 14.3  (317.80667 +34.32064) Search nearby
B1950.0 21 09 10.58 +34 06 54.9
Proper motion
RA: -8.2 +/- 2.5 mas/yDec: -2.1 +/- 3.0 mas/ySource: UCAC4
Galactic coord. 79.597 -9.436
Other names

(Internal only)
2MASS J21111360+3419142 LD 391 USNO-B1.0 1243-0462412
(Not logged in)  Add name
Variability type
EA
Spectral type --
Mag. range
13.4 - 15.9 V
Discoverer L. Dahlmark
Epoch
13 Sep 2012 (HJD 2456184.296) Ephemeris
Outburst --
Period 1.388613 d
Rise/eclipse dur. 14%  (4.67 h)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Holmberg, Gustav This variable was discovered by Dahlmark, who classified it as type L. During monitoring in the autumn of 2012, the Swedish variable star group SAAF/V found deep eclipses and determined the elements of this eclipsing variable. Amplitude of secondary minimum: about 0.1 mag (V).
(Not logged in)  Add remark
References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Bengtsson, H.; et al., 2013, V2331 Cygni is an Algol Variable With Deep
Eclipses 		2013JAVSO..41..264B
2 L. Dahlmark, IBVS N5181, 2001. 2001IBVS.5181....1D
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 = 12.50H = 12.26K = 12.17J - K = 0.34
AllWISE W1 = 12.24W2 = 12.30W3 = 12.14W1 - W2 = -0.06
APASS-DR9 B = 13.55V = 13.45g' = 13.20r' = 13.45i' = 13.41B - V = 0.11
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Image not downloaded. Click Retrieve Image to download and view. Retrieve image
Supporting Documents
Click document name to open or save. Browser plug-in or other software may be required for viewing.
2 Phase plot V-data 2012-2015. Karlsson, Thomas 2015-09-01 18:18 UTC From observations done by SAAF (Association of Swedish Amateur Astronomers)
1 Phase plot Holmberg, Gustav 2012-10-30 15:04 UTC Phase plot, V data.
(Not logged in)  Add document
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Karlsson, Thomas 2015-08-30 14:52 UTC Updated period and added eclipse duration, based on observations 2012-2015
4 Karlsson, Thomas 2015-07-27 14:30 UTC Added reference.
3 Holmberg, Gustav 2012-10-07 14:36 UTC Type, period, epoch and range revised. Note about the discovery of eclipses added. UCAC4 position.
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]
3.142.220.14