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Name
  V2156 Cyg  
AAVSO UID
000-BDP-858 (14 observations)  
Constellation
Cygnus Sequence
J2000.0
21 25 02.44 +44 27 06.4  (321.26017 +44.45178) Search nearby
B1950.0 21 23 09.79 +44 14 07.4
Proper motion
RA: -0.373 +/- 0.047 mas/yDec: -2.722 +/- 0.045 mas/ySource: Gaia DR1
Galactic coord. 88.806 -4.318
Other names

(Internal only)
2MASS J21250244+4427063 4XMM J212502.4+442706 ALS 11848
BD+43 3913 GSC 03194-02107 HBHA 4205-03
HIP 105741 Hilt 1045 IOMC 3194000063
LS III +44 43 MCW 983 MWC 640
PPM 61415 SAO 50816 TIC 239408899
TYC 3194-2107-1 XMMSL1 J212501.9+442706 [KW97] 57-52
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Variability type
GCAS
Spectral type B1.5V:nnpe
Mag. range
8.82 - 8.93 V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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References
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1 Nazé, Y.; Motch, C.; Rauw, G.; et al., 2020, Three discoveries of γ
Cas analogues from dedicated XMM-Newton observations of Be stars
2020MNRAS.493.2511N
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
2012arXiv1210.0821A
3 European Space Agency, 1997, The Hipparcos and Tycho Catalogues, ESA
SP-1200
1997yCat.1239....0E
External Links
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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 = 7.43H = 7.21K = 6.94J - K = 0.49
AllWISE W1 = 6.47W2 = 6.10W3 = 5.42W4 = 4.60W1 - W2 = 0.36W3 - W4 = 0.83
Images
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Supporting Documents
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Revision History
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4 Otero, Sebastian Alberto 2024-01-09 00:58 UTC Type from 2020MNRAS.493.2511N. Range from INTEGRAL-OMC data.
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 19:53 UTC Added spectral type from [1997yCat.1239....0E].
1 Admin, VSX 2005-12-18 01:33 UTC Initial database population.