WDS 18187-1837 BU 639 AB : NOTES
 
 
discov_num notes refcode
BU 639 There was a close approach around 1900.
Large divergences in estimated distance due to considerable southern
declination. Vou1951
1994.5191: Quadrant determined by speckle imaging analysis Hor1996
 
 
REFERENCES
 
 
refcode metd author reference
Hor1996 S j Horch, E.P. Dinescu, D.I., Girard, T.M., van Altena, W.F., Lopez, C., & Franz, O. 1996AJ....111.1681H
Hor1996 AJ 111, 1681, 1996 (see also 1997 Inf. Circ. 131, 1 re: HR 4143) 1997IAUDS.131....1H
Vou1951 Ma - Voute, J.G. 1951RA......2..319V
Vou1951 Vatican Obs. Richerche Astron. 2, 319, 1951
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 FOX Fox, P.
190 SHJ South, J. & Herschel, J.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18187-1837 BU 639 AB 1996 30 143 0.4 7.20 8.20 B0Ib N 181843.26-183710.8
18187-1837 BU 639 AB 2008 31 140 0.5 7.20 8.20 B0Ib N 181843.26-183710.8
18187-1837 BU 639 AB 2017 32 137 0.5 7.20 8.20 B0Ib N 181843.26-183710.8

If you need more information about this double, apply for a data request form to the WDS.