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Name
  NSV 25023  
AAVSO UID
000-BLV-662 (No observations)  
Constellation
Cygnus Sequence
J2000.0
20 09 24.43 +34 42 59.2  (302.35179 +34.71644) Search nearby
B1950.0 20 07 29.69 +34 34 07.9
Proper motion
RA: 28.192 +/- 0.056 mas/yDec: -29.113 +/- 0.058 mas/ySource: Gaia DR1
Galactic coord. 72.130 +0.893
Other names

(Internal only)
1RXS J200923.7+344259 ASCC 621667 BD+34 3888
GSC 02679-01140 HD 191588 HIP 99301
LF 3a +34 205 PPM 84329 SAO 69515
TYC 2679-1140-1    
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Variability type
RS
Spectral type K2.5III+F5V
Mag. range
8.241 V (0.157)clear
Discoverer --
Epoch
04 Aug 2015 (HJD 2457239.0) Ephemeris
Outburst --
Period 61.0 d
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto Triple system, the inner RS CVn-binary has a period of 60.0269 d. M-type dwarf companion with a period of 1667 d. HIPPARCOS data show very long-term mean magnitude changes.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 MASCARA Variable star catalogue (online data) 2018arXiv180602247B
2 O. Burggraaff, G.J.J. Talens, J. Spronck et al., 2018, Studying bright
variable stars with the Multi-site All-Sky CAmeRA (MASCARA)
2018arXiv180602247B
3 Griffin, R. F.; et al., 2003, Contribution à l'étude des binaires des types
F, G, K, M. IX. HD 191588, nouvelle binaire spectroscopique à raies simples
de types RS CVn, système triple
2003RoAJ...13...31G
4 The Hipparcos and Tycho Catalogues, Vol.11 and Vol.17, CD-ROM No.1,
SP-1200, ESA, 1997.
1997ESASP1200.....P
External Links
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Location    Go   
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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 = 6.17H = 5.54K = 5.42J - K = 0.75
AllWISE W1 = 5.25W2 = 5.25W3 = 5.31W4 = 5.20W1 - W2 = -0.00W3 - W4 = 0.11
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 09 24.43 +34 42 59.2 (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 Admin, VSX 2018-08-29 00:26 UTC Update from [2018arXiv180602247B].
2 Otero, Sebastian Alberto 2016-01-16 00:27 UTC Range and position from HIPPARCOS data. Type, spectral type and periods from 2003RoAJ...13...31G.
1 Admin, VSX 2005-12-18 01:33 UTC Preserved original object data.