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Latest Details
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| Name |
V2331 Cyg |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
21 09 10.58 +34 06 54.9 |
| Proper motion |
| RA: -8.2 +/- 2.5 mas/y | Dec: -2.1 +/- 3.0 mas/y | Source: UCAC4 |
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| Galactic coord. |
79.597 -9.436 |
Other names
(Internal only)
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2MASS J21111360+3419142 |
LD 391 |
USNO-B1.0 1243-0462412 |
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| Variability type |
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EA |
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| Spectral type |
-- |
| Mag. range |
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13.4 - 15.9 V |
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| Discoverer |
L. Dahlmark |
| Epoch |
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| Outburst |
-- |
| Period |
1.388613 d |
| Rise/eclipse dur. |
14% (4.67 h) |
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Remarks
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Some references may be clicked to view in new window. Roll over index number to view submission details.
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1 |
Holmberg, Gustav
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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). |
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References
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External Links
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Location
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Catalog Data
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Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
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2MASS
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J = 12.50 | H = 12.26 | K = 12.17 | J - K = 0.34 |
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AllWISE
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W1 = 12.24 | W2 = 12.30 | W3 = 12.14 | W1 - W2 = -0.06 |
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APASS-DR9
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B = 13.55 | V = 13.45 | g' = 13.20 | r' = 13.45 | i' = 13.41 | B - V = 0.11 |
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Images
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Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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Revision History
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Currently approved revision is checked. Click revision number to view details of that revision.
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5 |
Karlsson, Thomas
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2015-08-30 14:52 UTC |
Updated period and added eclipse duration, based on observations 2012-2015 |
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4 |
Karlsson, Thomas
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2015-07-27 14:30 UTC |
Added reference. |
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3 |
Holmberg, Gustav
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2012-10-07 14:36 UTC |
Type, period, epoch and range revised. Note about the discovery of eclipses added. UCAC4 position. |
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2 |
Admin, VSX
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2010-01-05 04:43 UTC |
Position updated from the GCVS version of November 2009. |
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1 |
Admin, VSX
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2005-12-18 01:33 UTC |
Initial upload. |
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