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Details for Revision 2
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Name
  EP Lyr  
AAVSO UID
000-BCW-306 (4336 observations)  
Constellation
Lyra Sequence
J2000.0
19 18 19.56 +27 51 03.1  (289.58150 +27.85086) Search nearby
B1950.0 19 16 19.08 +27 45 31.3
Galactic coord. 60.732 +6.945
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J19181955+2751031 AAVSO 1914+27 ALS 10242
AN 377.1931 ASAS J191820+2751.0 BD+27 3334
CDS 1057 GSC 02132-03812 IOMC 2132000054
IRAS 19163+2745 LS II +27 3 NSVS 8348052
TYC 2132-3812-1    
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Variability type
RVB
Spectral type A4Ib-G5p
Mag. range
9.96 - 10.90: V
Discoverer --
Epoch
28 Oct 1932 (HJD 2427009) Ephemeris
Outburst --
Period 83.34 d
Rise/eclipse dur. 18%  (15 d)
Remarks
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1 Otero, Sebastian Alberto The best period from 1995 to 2016 is 82.98 d. The older 1973 data fit the recent data with a period of 83.06 d.
2 GCVS Team Max I Ã?? = 0.20P; Min II 10.36m - 10.58m, Ã?? = 0.50P; Max II 10.01m - 10.10m, Ã?? = 0.70P. Secondary oscillations: P2 = 45.1d, P3 = 7067d [L.Mantegazza, IBVS N1500, 1978.].
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References
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1 Henden, A. A.; et al., 2012, Data Release 3 of the AAVSO All-Sky
Photometric Survey (APASS)		 2012JAVSO..40..430H
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
3 Wozniak, P. R.; et al., 2004, Northern Sky Variability Survey: Public Data
Release		 2004AJ....127.2436W
4 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
5 Zsoldos, E., 1995, Photometry of EP Lyrae and period changes in RV Tauri
stars.		 1995A&A...296..122Z
6 M.Beyer, Bamb Ver XII, N123, 1977. 1977VeBam.123.....B
7 Dupuy, D. L., 1973, New observations of RV Tauri stars. 1973ApJ...185..597D
8 A.A.Wachmann, Bergd Abh 6, N3, 1964. --
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2016-03-21 09:44 UTC Phase plot with data from Dupuy, Zsoldos, ASAS-3, INTEGRAL-OMC, APASS, NSVS and AAVSO.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
4 Otero, Sebastian Alberto 2016-03-21 09:53 UTC Type corrected.
3 Otero, Sebastian Alberto 2016-03-21 09:44 UTC Type from 1995A&A...296..122Z. Period, epoch and range from Dupuy's, Zsoldos', ASAS-3, INTEGRAL-OMC, APASS, NSVS and AAVSO V data.
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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