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Name
  V0652 Her  
AAVSO UID
000-BDR-551 (17 observations)  
Constellation
Hercules Sequence
J2000.0
16 48 04.70 +13 15 42.5  (252.01958 +13.26181) Search nearby
B1950.0 16 45 46.00 +13 20 56.5
Proper motion
RA: -4.32 +/- 1.79 mas/yDec: 3.17 +/- 1.47 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 31.331 +33.277
Other names

(Internal only)
2MASS J16480469+1315422 ASAS J164805+1315.7 BD+13 3224
FB 168 GSC 00974-00693 HIP 82236
PPM 132680 TYC 974-693-1  
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Variability type
BXCIR
Spectral type B1p
Mag. range
10.51 - 10.57 V
Discoverer --
Epoch
18 Jun 1974 (HJD 2442216.805) Ephemeris
Outburst --
Period 0.10799 d  (2.592 h)
Rise/eclipse dur. 30%  (0.8 h)
Remarks
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1 Otero, Sebastian Alberto Extreme Helium star. Period changes.
2 GCVS Team P var; nonlinear term: -45.80d*10**(-10)*E**2. Delta(m) var. Resembles PV TEL type stars but is a helium rich subdwarf. Epoch of Max is given. Secondary hump at the phase 0.5P.
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References
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1 IBVS #5817 2008IBVS.5817....1J
2 Period changes in the pulsating extreme helium stars V652 Her and BX Cir 2005MNRAS.361..559K
3 D.Kilkenny, SAAO Circ N7, 70, 1983. 1983SAAOC...7...70K
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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 = 10.93H = 11.07K = 11.09J - K = -0.17
AllWISE W1 = 11.13W2 = 11.18W3 = 11.10W1 - W2 = -0.05
APASS-DR9 B = 10.43V = 10.60g' = 10.53r' = 10.79i' = 11.23B - V = -0.17
SDSS-DR12 u = 10.23g = 10.44r = 10.72i = 11.01z = 11.81u - g = -0.21r - i = -0.29
Images
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Supporting Documents
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Revision History
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4 Otero, Sebastian Alberto 2011-10-31 05:04 UTC Reference added.
3 Otero, Sebastian Alberto 2011-10-31 05:01 UTC Period and range from 2005MNRAS.361..559K. Type from IBVS 5817.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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