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Name
  NSV 2731  
AAVSO UID
000-BBK-396 (768 observations)  
Constellation
Orion Sequence
J2000.0
05 55 40.65 +20 04 40.3  (88.91938 +20.07786) Search nearby
B1950.0 05 52 42.52 +20 04 14.9
Proper motion
RA: -2.093 +/- 2.053 mas/yDec: -0.005 +/- 1.811 mas/ySource: Gaia DR1
Galactic coord. 188.783 -2.570
Other names

(Internal only)
1RXS J055553.0+200418 1SWASP J055540.65+200440.3 2MASS J05554065+2004403
AAVSO 0549+20F AAVSO_ALIAS 0549+20 C AAVSO_ALIAS 106 VAR? S
ALS 8598 ASAS J055541+2004.7 CSV 100698
Hilt 498 LS 7 LS V +20 5
LS V+20 005 LSS 0007 NSVS 9622197
TYC 1320-552-1 Zinn 0493 [GG53] 19
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Variability type
CST
Spectral type B1IV
Mag. range
10.90 V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 GCVS Team Schwab. Var* [H.-U.Sandig, AN 279, H. 2, 89-93, 1950.].
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References
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1 C.B.Stephenson, N.Sanduleak, Warner and Swasey Publ 1, No.1, 1971. 1971PW&SO...1....1S
2 Hiltner, W. A., 1956, Photometric, Polarization, and Spectrographic
Observations of O and B Stars.
1956ApJS....2..389H
3 E.Zinner, Erg AN 8, No.1, 1929. --
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 = 10.09H = 10.03K = 9.99J - K = 0.11
AllWISE W1 = 9.93W2 = 9.96W3 = 10.03W1 - W2 = -0.03
APASS-DR9 B = 11.25V = 10.87g' = 11.07r' = 10.82i' = 10.75B - V = 0.38
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 05 55 40.65 +20 04 40.3 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Otero, Sebastian Alberto 2016-01-06 02:30 UTC Type from ASAS-3, APASS, SuperWASP and NSVS data. Magnitude from GCPD, ASAS-3 and APASS data. UCAC4 position. Spectral type from 1956ApJS....2..389H.
2 Admin, VSX 2010-01-18 23:18 UTC Position updated to NSV version of June 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.