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Name
  AK Her  
AAVSO UID
000-BCV-991 (3754 observations)  
Constellation
Hercules Sequence
J2000.0
17 13 57.82 +16 21 00.6  (258.49092 +16.35017) Search nearby
B1950.0 17 11 43.23 +16 24 27.7
Proper motion
RA: 25.210 +/- 0.120 mas/yDec: -47.098 +/- 0.113 mas/ySource: Gaia DR1
Galactic coord. 37.511 +28.733
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J171358.0+162051 AAVSO 1709+16 ADS 10408 A
AN 33.1917 ASAS J171358+1620.8 ASAS J171358+1621.0
BD+16 3130 HD 155937 HIP 84293
HV 3428 SAO 102668  
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Variability type
EW/KW
Spectral type F4V
Mag. range
8.29 - 8.77 V
Discoverer --
Epoch
28 Aug 2009 (HJD 2455071.5659) Ephemeris
Outburst --
Period 0.4215228 d  (10.11655 h)
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team ADS 10408 A (B 12.0m, 5", 323deg). Min II 8.64. Min II - Min I = 0.505P. dII = 0.07P. P var. Before JD2421200 Min = 2421200.549 + 0.42152207d*E; Min = 2421200.549 + 0.42152083d*E (JD2421200 - 24950); Min = 2424949.555 + 0.42152061d*E (JD2424950 - 30000) [E.J.Woodward, HC N446, 1942.]; Min = 2430939.368 + 0.42152362d*E (JD2430000 - 41500); since 2441500 - see Table. The shape of the light curve var.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 L. Pagel, 2015, Periodenkontrolle von BAV-Programmsternen per Datamining
Circular Heft 1
BAV Rundbrief, 1/2015 (February 2015)
2 Bob Nelson's O-C files, 2016 --
3 M. Kiraga, 2012, Acta Astronomica 62, 67 2012AcA....62...67K
4 S. Deb, H.P. Singh, 2010, arXiv:1011.2574v1 [astro-ph.SR] 2010arXiv1011.2574D
5 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
6 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 1956ApJ...123..246R
7 A.E.Prikhod'ko, Odessa Izv. 2, Issue 2, 72, 1952. --
8 Sternberg, B., 1927, Messungen von veranderlichen Sternen in der Jahren
1925-1926
1927PAICU...7D...1S
9 CALEB - Catalog and AtLas of Eclipsing Binaries --
10 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
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 = 7.47H = 7.22K = 7.16J - K = 0.31
AllWISE W1 = 6.97W2 = 7.07W3 = 7.09W4 = 7.08W1 - W2 = -0.10W3 - W4 = 0.01
APASS-DR9
Images
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Supporting Documents
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Revision History
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5 Otero, Sebastian Alberto 2015-09-24 20:44 UTC Period from BAV Rundbrief 1/2015.
4 Billiaert, Bruno 2015-05-27 05:42 UTC Reference added.
3 Admin, VSX 2010-11-12 23:26 UTC Update from [2010arXiv1011.2547D].
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.