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Latest Details
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Name
  NSV 25115  
AAVSO UID
000-BPK-913 (197 observations)  
Constellation
Cygnus Sequence
J2000.0
20 21 24.85 +37 22 48.2  (305.35354 +37.38006) Search nearby
B1950.0 20 19 32.79 +37 13 11.8
Proper motion
RA: -6.1 +/- 1.5 mas/yDec: -3.5 +/- 1.4 mas/ySource: UCAC4
Galactic coord. 75.694 +0.359
Other names

(Internal only)
2MASS J20212485+3722482 ALS 18757 ASASSN-V J202124.92+372248.6
ATO J305.3535+37.3800 Berkeley 87 9 GSC 02684-00007
HBHA 3703-24 TIC 13252288 UCAC4 637-092943
VES 203 [KW97] 45-42 [MS2011b] Berkeley 87 2
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Variability type
GCAS
Spectral type B0.5Ve
Mag. range
12.00 - 12.26 V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 GCVS Team B-V = 1.40. To SE from LS II+37 73.
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References
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1 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0
2017PASP..129j4502K
2 Chojnowski, S. D.; et al., 2015, High-Resolution H-Band Spectroscopy of Be
Stars With SDSS-III/Apogee: I. New Be Stars, Line Identifications, and Line
Profiles
2015AJ....149....7C
3 G.V.Coyne, W.Wisniewski, C.Corbally, Vatican Publ 1, No.6, 197, 1975. 1975VatOP...1..197C
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 = 9.47H = 9.11K = 8.86J - K = 0.61
AllWISE W1 = 7.49W2 = 7.09W3 = 6.11W4 = 4.81W1 - W2 = 0.40W3 - W4 = 1.30
APASS-DR9 B = 13.40V = 12.07g' = 12.72r' = 11.50i' = 10.88B - V = 1.33
Images
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Supporting Documents
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Stellar Association Membership
 Berkeley 87 Open Cluster 2012A&A...548A..97Z
Revision History
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2 Otero, Sebastian Alberto 2022-08-10 19:19 UTC Spectral type from 2015AJ....149....7C. Type from ASAS-SN data. Gaia DR3 position.
1 Admin, VSX 2005-12-18 01:33 UTC Preserved original object data.