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Name
  VV Cep  
AAVSO UID
000-BCP-658 (10653 observations)  
Constellation
Cepheus Sequence
J2000.0
21 56 39.14 +63 37 32.0  (329.16308 +63.62556) Search nearby
B1950.0 21 55 14.49 +63 23 13.1
Proper motion
RA: -0.25 +/- 0.27 mas/yDec: -2.56 +/- 0.19 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 104.919 +7.046
Other names

(Internal only)
AAVSO 2153+63 BD+62 2007 HD 208816
HIP 108317 HR 8383 IRC +60333
RAFGL 2821 SAO 19753  
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Variability type
EA/GS+SRC
Spectral type M2Iabe+B0/2Ve
Mag. range
4.88 - 5.40 V
Discoverer --
Epoch
13 Feb 1998 (HJD 2450858) Ephemeris
Outburst --
Period 7498 d  (20.53 y)
Rise/eclipse dur. 12%:
Remarks
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1 Otero, Sebastian Alberto The 1998 eclipse was 68 days late according to the ephemeris by Gaposchkin JD 2421070 + 7430 x E. Eclipse duration is variable (from 8 to 13%).
2 GCVS Team VB (0.05", 174deg, 1950)? 0.066P <= D <= 0.091P; 0.040P <= d <= 0.077P. Depth of eclipses: 2.30m (lambda 3500 A), 1.9m (U), 0.4m (B). M-component is of SRC type: Max = 2443045 + 118.37d*E [M.Saito, H.Sato, K.Saijo, T.Hayasaka, PAS Japan 32, 163-177, 1980., G.P.McCook, E.F.Guinan, IBVS N1385, 1978.]; A(V) <= 0.33m. Light oscillations are also noted with P ~58d [L.Baldinelli, S.Ghedini, S.Marmi, IBVS N1675, 1979.], 25d and 150d [G.Hill, G.L.C.Aikman, R.W.Hilditch, E.L.Pfannenschmidt, P.F.Younger, Victoria Publ 15, N10, 389, 1980.]. B-component may be also an intrinsic variable [G.Larsson-Leander, Stockh Medd N96, 1957.]. Gaseous streams. Strong variable magnetic field.
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References
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1 Hopkins, J. L.; Bennett, P. D.; Pollmann, E., 2015, VV Cephei Eclipse
Campaign 2017/19
2015SASS...34...83H
2 Leedjärv, L.; Graczyk, D.; Mikolajewski, M.; et al., 1999, The 1997/1998
eclipse of VV Cephei was late
1999A&A...349..511L
3 M.Saito, H.Sato, K.Saijo, T.Hayasaka, PAS Japan 32, 163-177, 1980. 1980PASJ...32..163S
4 L.W.Fredrick, Sky and Tel 18, N3, 132, 1959. --
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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 = 1.23H = 0.37K = -0.00J - K = 1.23
AllWISE W3 = -0.39W4 = -0.79W3 - W4 = 0.41
Images
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Supporting Documents
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Revision History
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3 Otero, Sebastian Alberto 2017-07-19 00:57 UTC Period and epoch from 1999A&A...349..511L. Range from AAVSO and GCPD data. Spectral type from 2015SASS...34...83H.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.