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Details for Revision 2
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Name
  del Sge  
AAVSO UID
000-BCH-941 (54 observations)  
Constellation
Sagitta Sequence
J2000.0
19 47 23.27 +18 32 03.3  (296.84696 +18.53425) Search nearby
B1950.0 19 45 09.51 +18 24 35.0
Galactic coord. 55.767 -3.383
Other names

(Internal only)
7 Sge AAVSO 1942+18 BD+18 4240
CSV 101889 HD 187076 HD 187077
HIP 97365 HR 7536 IRAS 19451+1824
IRC +20433 PPM 136976 RAFGL 2456
SAO 105259 SRS 30743 SV* P 5104
TIC 386634500 TYC 1619-3542-1 WDS J19474+1832AB
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Variability type
SR
Spectral type M2II+A0V
Mag. range
3.75 - 3.83 V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Periods found in 2001PASP..113..983P: 47.4 and 25 d. Possible Long Secondary Period (LSP) around 650 d. (2015MNRAS.454.2344P). Orbital period 3703.7 d.
2 2009arXiv0908.3228T Detected periods: 32.4, 34.0, 34.8, 54.2d [2009arXiv0908.3228T].
3 GCVS Team VB A (B, A = 0.04", P = 7 yr); SB2 (Porb = 3725d [D.B.McLaughlin, E.B.Weston, M.Chadwick, PASP 64, 300, 1952.]). The last superior conjunction of the B-star and its atmospheric eclipse was in March - April 1980 [A.H.Batten, W.A.Fisher, PASP 93, 769, 1981.].
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Pugh, T.; Gray, D. F.; Griffin, R. F., 2015, The orbit and variations of
δ Sagittae		 2015MNRAS.454.2344P
2 V. Tabur, T.R. Bedding, L.L. Kiss, T.T. Moon, B. Szeidl, H. Kjeldsen, 2009,
arXiv:0908.3228v1 [astro-ph.SR]		 2009arXiv0908.3228T
3 V. Tabur, T.R. Bedding, L.L. Kiss, T.T. Moon, B. Szeidl, H. Kjeldsen, 2009,
arXiv:0908.3228v1 [astro-ph.SR]		 2009arXiv0908.3228T
4 C. Koen, L. Eyer, 2002, MNRAS 331, 45 2002MNRAS.331...45K
5 Percy, J. R.; Wilson, J. B.; Henry, G. W., 2001, Long-Term VRI Photometry
of Small-Amplitude Red Variables. I. Light Curves and Periods		 2001PASP..113..983P
6 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
7 H.Neckel, AsAp Suppl 18, 169, 1974. 1974A&AS...18..169N
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Supporting Documents
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Revision History
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3 Otero, Sebastian Alberto 2023-08-24 18:41 UTC Spectral type and orbital period from 2015MNRAS.454.2344P. Period and maximum magnitude derived from 2001PASP..113..983P. Minimum magnitude derived from Hipparcos data. Gaia DR3 position.
2 Admin, VSX 2009-08-26 01:52 UTC Update from [2009arXiv0908.3228T].
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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