WDS 21390+5729 MIU 2 Aa,Ab : NOTES
 
 
discov_num notes refcode
BU 1143 The classification and orbit of the primary are from Burkholder et al.
STF2816 (1997 ApJ 490, 328). Stickland (1995) found that the spectral line Stc1995
GUI 36 variations result from one close binary (with weak secondary lines)
FLE 3 and a stationary component, a conclusion later confirmed by Burkholder
et al. The speckle resolution of the system (CHR 212Aa,Ab) clearly
supports the view that this is an SB2 plus a distant O star companion.
The C and D components were also observed and appeared to be single. Msn1998a
Classifications of the C and D components are from Hoffleit & Warren
(1991). Hof1991
STF2816 AC: H 3 71. MEv2010
 
 
REFERENCES
 
 
refcode metd author reference
Hof1991 - Hoffleit, D. & Jaschek, C. 1991bsc..book.....H
Hof1991 The Bright Star Catalogue, Fifth Revised Edition (preliminary version), 1991
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Msn1998a Sc j Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G., 1998AJ....115..821M
Msn1998a ten Brummelaar, T.A., & McAlister, H.A.
Msn1998a AJ 115, 821, 1998
Stc1995 not - Stickland, D.J. 1995Obs...115..180S
Stc1995 Observatory 115, 180, 1995
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 FLE Fleckenstein, J.
182 GUI Guillaume, J.
187 MIU Miura, N., Baba, N., Ni-ino, M., Ohtsubo, J., Noguchi, M., & Isobe, S.
192 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21390+5729 MIU 2 Aa,Ab 2005 9 248 0.1 5.73   O6f N 213857.61+572920.5
21390+5729 MIU 2 Aa,Ab 2007 12 225 0.1 5.73   O6f N 213857.61+572920.5
21390+5729 MIU 2 Aa,Ab 2018 16 196 0.1 5.73   O6V+B0:V N 213857.61+572920.5

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