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Latest Details
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Name
  AH Her  
AAVSO UID
000-BBX-906 (71424 observations)  
Constellation
Hercules Sequence
J2000.0
16 44 10.01 +25 15 01.9  (251.04171 +25.25053) Search nearby
B1950.0 16 42 06.12 +25 20 31.6
Proper motion
RA: -4.545 +/- 0.660 mas/yDec: 4.200 +/- 0.800 mas/ySource: Gaia DR1
Galactic coord. 44.850 +38.236
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1640+25 AN 20.1923 Downes AH Her
GSC 02049-01115 PG 1642+253 ROTSE1 J164409.33+251503.7
SVS 32 TYC 2049-1115-1 UCAC4 577-054498
USNO-B1.0 1152-0246245 X 16421+253  
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Variability type
UGZ/IW
Spectral type pec(UG)+K7V
Mag. range
10.8 - 14.9 V
Discoverer --
Epoch
--
Outburst --
Period 0.258116 d  (6.1948 h)
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto GCVS outburst cycle is 19.8 d.
2 GCVS Team Porb = 5.9d:. Oscillations during outbursts: 24s <= P <= 39s, Delta(m) <= 0.003m [R.H.Hildebrand, E.J.Spillar, J.Middleditch, J.J.Patterson, R.F.Stiening, ApJ 238, L 145, 1980.]. Flicckering in Max And Min up to 0.4m in 2 - 8 minutes [W.Wargau, J.Rahe, N.Vogt, AG Mitt N45, 45, 1979.].
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References
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1 Simonsen, M.; Boyd, D.; Goff, W.; et al., 2014, Z Cam Stars in the
Twenty-First Century
2014JAVSO..42..177S
2 Light curve from CRTS/CSS (Drake et al. 2009, ApJ, 696, 870) 2009ApJ...696..870D
3 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
4 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 2002MNRAS.337.1215N
5 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
6 C.Akerlof et al., AJ 119, 1901, 2000. 2000AJ....119.1901A
7 N.Vogt, F.M.Bateson, AsAp Suppl 48, N3, 383, 1982. 1982A&AS...48..383V
8 M.Petit, JO 43, 17, 1960. 1960JO.....43...17P
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 = 11.81H = 11.47K = 11.38J - K = 0.43
AllWISE W1 = 11.29W2 = 11.21W3 = 10.79W1 - W2 = 0.08
APASS-DR9 B = 11.90V = 11.76g' = 11.82r' = 11.84i' = 11.93B - V = 0.14
SDSS-DR12 u = 14.41g = 14.97r = 15.04i = 14.26z = 13.55u - g = -0.56r - i = 0.78
Images
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Supporting Documents
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Campaigns/Programs
 Z CamPaign
 Legacy CVs
Revision History
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4 Otero, Sebastian Alberto 2019-01-31 23:31 UTC Range from AAVSO data. Type from 2014JAVSO..42..177S. Gaia DR2 position.
3 Otero, Sebastian Alberto 2011-04-05 16:02 UTC Primary record creation. Orbital period from Downes (2001). Spectral type from Skiff (2010). Range from AAVSO data.
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.