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Name
  V0391 Peg  
AAVSO UID
000-BFB-999 (No observations)  
Constellation
Pegasus Sequence
J2000.0
22 04 12.11 +26 25 07.8  (331.05046 +26.41883) Search nearby
B1950.0 22 01 54.52 +26 10 33.2
Proper motion
RA: -2.7 +/- 2.5 mas/yDec: -0.1 +/- 2.8 mas/ySource: UCAC4
Galactic coord. 82.486 -23.030
Other names

(Internal only)
HS 2201+2610    
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Variability type
V361HYA
Spectral type sdB
Mag. range
14.3 (0.02) B
Discoverer --
Epoch
--
Outburst --
Period 0.004045 d  (5.825 min)
Rise/eclipse dur. --
Remarks
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1 Admin, VSX Radial mode of 349.5 seconds and dipole mode of 354.1 seconds, both with an amplitude of 0.01 mag in r.
2 Renz, Wolfgang Its a suspected (non-eclipsing,) circuumstellar exoplanet system that was found by the exoplanet's light time effect in the O-C values of the very rapidly pulsating hot subdwarf (RPHS) lightcurve.
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References
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1 R. Silvotti et al., 2010, arXiv:1005.2840v1 [astro-ph.SR] 2010arXiv1005.2840S
2 giant planet orbiting the 'extreme horizontal branch' star V391 Pegasi 2007Natur.449..189S
3 e O--C Diagram of the Subdwarf B Pulsating Star HS 2201+2610: Detection of
a Giant Planet ?
2007ASPC..372..369S
4 Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016) 2003A&A...400..939E
5 R. *Ostensen, J.-E. Solheim, U. Heber, R. Silvotti, S. Dreizler, H.
Edelmann, AsAp 368, No. 1, 175, 2001.
2001A&A...368..175O
6 Extrasolar Planets Encyclopaedia - Candidates detected by timing - V391
Peg
--
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 = 15.17H = 15.16K = 15.38J - K = -0.21
AllWISE W1 = 15.42W2 = 15.44W1 - W2 = -0.03
APASS-DR9 B = 14.41V = 14.61g' = 14.38r' = 14.82i' = 15.13B - V = -0.21
GALEX-DR5 FUV = 13.66NUV = 13.85FUV - NUV = -0.19
SDSS-DR12 u = 14.16g = 14.29r = 13.33i = 15.02z = 15.25u - g = -0.13r - i = -1.69
Images
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Supporting Documents
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Revision History
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5 Admin, VSX 2017-12-15 08:51 UTC Spectral type from Skiff (VizieR on-line data: B/mk)
4 Admin, VSX 2010-05-20 21:21 UTC Update from [2010arXiv1005.2840S].
3 Renz, Wolfgang 2010-03-11 07:56 UTC Updated the coordinates to the ones in the PPMX, CMC14, UCAC3, and 2MASS.
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.