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Name
  ES Del  
AAVSO UID
000-BCM-331 (1413 observations)  
Constellation
Delphinus Sequence
J2000.0
20 43 58.40 +19 14 17.0  (310.99333 +19.23806) Search nearby
B1950.0 20 41 42.26 +19 03 23.3
Galactic coord. 63.728 -14.240
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J20435841+1914170 AAVSO 2039+18 ASAS J204358+1914.3
DO 19307 GSC 01642-00636 IRAS 20416+1903
IRC +20479 NSVS J2043584+191417 RAFGL 2639
SON 4518    
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Variability type
M
Spectral type M10
Mag. range
10.6 - 16.5 p
Discoverer --
Epoch
29 Sep 1949 (HJD 2433189) Ephemeris
Outburst --
Period 373.9 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto VSP Note: 15.5 mag. star 12" to the SW and 16.5 mag. star 19" to the W.
2 Otero, Sebastian Alberto Period from ASAS-3 data (2002-2009) is 482 d. Period form AAVSO visual data starting in 1971 is 502 d.
3 GCVS Team Epoch of Max from [M.Morel, NZAS Publ N8, 29, 1980.], [E.Splittgerber, MVS 6, H.7, 167, 1974.] contradict the given elements.
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References
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1 P.R. Wozniak, S.J. Williams, W.T. Vestrand, V. Gupta, AJ 128, 2965, 2004 2004AJ....128.2965W
2 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
3 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 1960MitVS.506....1S
4 H.Huth, VSS 4, N2, 1957. --
5 MVS N308, 1957. --
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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.
4 Otero, Sebastian Alberto 2014-07-03 23:41 UTC Range from AAVSO data.
3 Admin, VSX 2010-04-02 00:15 UTC Update from ASAS 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.