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Name
  TW Her  
AAVSO UID
000-BBZ-639 (22279 observations)  
Constellation
Hercules Sequence
J2000.0
17 54 31.20 +30 24 37.7  (268.63000 +30.41047) Search nearby
B1950.0 17 52 36.67 +30 25 06.0
Proper motion
RA: 3.819 +/- 0.091 mas/yDec: -2.538 +/- 0.100 mas/ySource: Gaia DR1
Galactic coord. 55.874 +24.802
Other names

(Internal only)
1SWASP J175431.20+302437.6 AAVSO 1750+30 AN 93.1910
HIP 87681 HV 3279  
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Variability type
RRAB
Spectral type A4-F6
Mag. range
10.52 - 11.83 V
Discoverer --
Epoch
12 Nov 1917 (HJD 2421545.234) Ephemeris
Outburst --
Period 0.399600104 d  (9.5904025 h)
Rise/eclipse dur. 13%  (1.24675 h)
Remarks
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1 GCVS Team [Fe/H] = -0.47.
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References
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1 Greer, P. A.; Payne, S. G.; Norton, A. J.; et al., 2017, The SuperWASP
catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect
candidates
2017A&A...607A..11G
2 M.B.Bogdanov, Perem. Zvezdy Supplement 1, N5, 309, 1972. --
3 G.A.Lange, SAC N36, 1964. --
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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 = 10.39H = 10.21K = 10.13J - K = 0.25
AllWISE W1 = 10.22W2 = 10.23W3 = 10.09W1 - W2 = -0.01
APASS-DR9 B = 11.96V = 11.44g' = 11.69r' = 11.32i' = 11.23B - V = 0.53
Images
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Supporting Documents
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Revision History
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2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.