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Name
  NSV 25139  
AAVSO UID
--  
Constellation
Cygnus Sequence
J2000.0
20 23 59.54 +38 31 48.0  (305.99808 +38.53000) Search nearby
B1950.0 20 22 08.87 +38 22 02.4
Proper motion
RA: -3.126 +/- 1.250 mas/yDec: -5.343 +/- 0.726 mas/ySource: Gaia DR1
Galactic coord. 76.928 +0.599
Other names

(Internal only)
2MASS J20235954+3831479 ALS 11295 ASASSN-V J202359.40+383149.3
BD+38 4067 GCRV 12749 GSC 03152-01309
Gaia DR3 2061130173722073088 LS II +38 78 NGC 6913 4
NGC 6913 HOAG 8 NGC 6913 KJ 136 NGC 6913 SAND 147
NGC 6913 TIF 4 NGC 6913 ZUG 8 PPM 84866
TIC 14207366 TYC 3152-1309-1  
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Variability type
CST
Spectral type B0.5III
Mag. range
10.21 V
Discoverer A. A. Hoag et al.
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 GCVS Team V = 10.20 and only once 10.31, on JD 2441576 [G.A.Bakos, BAC 24, No.3, 164, 1973.].
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References
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1 Geffert, M.; zur Mühlen, M.; Hardenake, J.; Kraus, S., 2025, Auswertung
historischer Aufnahmen des Observatoriums Hoher List XI) Vier Kandidaten
für veränderliche Sterne im Sternbild Schwan
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2 Kazlauskas, A.; Jasevicius, V., 1986, Photoelectric Photometry of Stars in
the Vilnius System in the Region of the Open Cluster NGC6913 = M29
1986VilOB..75...18K
3 J.Papousek, Brno Contr No.19, 1979. --
4 A.A.Hoag, H.L.Johnson, B.Iriarte, R.I.Mitchell, K.L.Hallam, S.Sharpless,
Naval Obs Publ, 2nd ser., 17, part 7, 360, 1961.
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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 = 8.64H = 8.49K = 8.44J - K = 0.20
AllWISE W1 = 8.37W2 = 8.41W3 = 8.59W1 - W2 = -0.03
APASS-DR9 B = 10.99V = 10.21g' = 10.67r' = 9.94i' = 9.64B - V = 0.77
Images
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Supporting Documents
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Stellar Association Membership
 NGC 6913 Open Cluster 2012A&A...548A..97Z
Revision History
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3 Otero, Sebastian Alberto 2025-07-31 15:14 UTC Magnitude from the GCPD. Gaia DR3 position.
2 Bernhard, Klaus 2025-07-31 12:48 UTC Type from BAV Rundbrief 2/2025. Magnitude from 1986VilOB..75...18K.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.