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Details for Revision 3
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Name
  HS 2231+2441  
AAVSO UID
000-BCY-517 (1665 observations)  
Constellation
Pegasus Sequence
J2000.0
22 34 21.48 +24 56 57.4  (338.58950 +24.94928) Search nearby
B1950.0 22 31 59.18 +24 41 26.2
Galactic coord. 87.481 -28.327
Other names

(Internal only)
2MASS J22342148+2456573 CRTS J223421.4+245656 GSC 02223-00214
SDSS J223421.49+245657.1 UCAC2 40618939 USNO-B1.0 1149-0563437
VSX J223421.4+245657    
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Variability type
EA/HW
Spectral type sdB+L
Mag. range
14.15 (0.31) V
Discoverer --
Epoch
20 Aug 2010 (HJD 2455428.76185) Ephemeris
Outburst --
Period 0.1105879 d  (2.65411 h)
Rise/eclipse dur. 11%  (0.292 h)
Remarks
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1 Wils, Patrick The cool companion must be at the low mass limit for an M dwarf star, with an orbital radial velocity semi-amplitude of K_1 = 49.1 km/s.
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References
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1 Schaffenroth, V.; Barlow, B. N.; Geier, S.; et al., 2019, The EREBOS
project: Investigating the effect of substellar and low-mass stellar
companions on late stellar evolution. Survey, target selection, and
atmospheric parameters
2019A&A...630A..80S
2 Almeida, L. A.; et al., 2017, HS 2231+2441: an HW Vir system composed by a
low-mass white dwarf and a brown dwarf
2017arXiv170804623A
3 Drake, A. J.; et al., 2014, The Catalina Surveys Periodic Variable Star
Catalog (version May 24, 2017)
2014ApJS..213....9D
4 Oestensen R., et al., 2007, HS 2231+2441: A New Eclipsing sdB Binary of the
HW Vir Type
2007ASPC..372..483O
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Supporting Documents
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Otero, Sebastian Alberto 2020-10-24 00:02 UTC Gaia DR2 position.
4 Otero, Sebastian Alberto 2018-08-28 01:18 UTC Period from 2014ApJS..213....9D (2017 version). Type and amplitude from CSS data. UCAC4 position.
3 Admin, VSX 2017-12-26 21:32 UTC Added HW Vir-subtype.
2 Otero, Sebastian Alberto 2017-08-18 09:17 UTC Period, epoch, eclipse duration, amplitude and spectral type from 2017arXiv170804623A. Mean magnitude from APASS data.
1 Wils, Patrick 2007-11-25 05:33 UTC Initial submission.