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Name
  NSV 12381  
AAVSO UID
000-BCH-807 (No observations)  
Constellation
Cygnus Sequence
J2000.0
19 44 58.48 +45 07 50.9  (296.24367 +45.13081) Search nearby
B1950.0 19 43 24.72 +45 00 28.3
Proper motion
RA: 44.07 +/- 0.46 mas/yDec: 48.66 +/- 0.49 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 78.710 +10.243
Other names

(Internal only)
18 Cyg del Cyg 1RXS J194459.0+450751
ADS 12880 A BD+44 3234 A HD 186882
HIP 97165 HR 7528 A IRC +50308
PPM 58782 SAO 48796 A  
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Variability type
CST
Spectral type B9.5IV
Mag. range
2.91 V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto V= 2.87 given in the literature is for the combined magnitude of delta Cyg A (NSV 12381) and its 2.5" companion NSV 12380 (delta Cyg B; V= 6.33; F1V). Constant in HIPPARCOS data.
2 GCVS Team ADS 12880A (see 12380).
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References
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1 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
2 K.Pilowski, AN 280, 94-96, 1951. 1951AN....280...94P
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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 = 2.75H = 2.95K = 2.68J - K = 0.07
AllWISE W3 = 2.93W4 = 2.89W3 - W4 = 0.04
Images
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Supporting Documents
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Revision History
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2 Otero, Sebastian Alberto 2016-01-20 05:06 UTC Type, magnitude and position from HIPPARCOS data. Spectral type from Skiff (2014).
1 Admin, VSX 2005-12-18 01:33 UTC Preserved original object data.

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