WDS 21186+1134 BU 163 AB (HD 202908) : NOTES
 
 
discov_num notes refcode
BU 163 A is a double-lined spectroscopic binary, period 4.0d.
1986.395, 1986.565: The separation of this difficult partially
resolved pair was calculated under the assumption that delta V = 1.2
magnitude, but the large number of measurements makes the result
reliable. The strange character of the observed motion (Tokovinin,
1986 Astron. Circ. No. 1415) is confirmed. Tok1985
Spectral types and masses of components assigned by ten Brummelaar et
al., based on adaptive optics observations. TtB2000
Mass-sum in good agreement with the complete speckle/spectroscopic Fek1997
analysis by Fekel et al. (1997). Sod1999
AB: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 2.44 +/- 1.33, 2.19, and 1.99 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Fek1997 Sc j Fekel, F.C., Scarfe, C.D., Barlow, D.J., Duquennoy, A., McAlister, H.A., 1997AJ....113.1095F
Fek1997 +orb Hartkopf, W.I., Mason, B.D., & Tokovinin, A.A.
Fek1997 AJ 113, 1095, 1997
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sod1999 orb - Soderhjelm, S. 1999A&A...341..121S
Sod1999 A&A 341, 121, 1999
Tok1985 Ig u Tokovinin, A.A. 1985A&AS...61..483T
Tok1985 A&AS 61, 483, 1985
TtB2000 Ac j ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr., 2000AJ....119.2403T
TtB2000 Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
TtB2000 AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO)
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21186+1134 BU 163 AB 2008 201 79 0.8 8.94 7.37 G0V+G6V NOD 211834.85+113408.2
21186+1134 BU 163 AB 2009 209 257 0.8 8.94 7.37 G0V+G6V NOD 211834.85+113408.2
21186+1134 BU 163 AB 2012 212 258 0.8 7.31 8.88 G0V G6V NOD 211834.85+113408.2
21186+1134 BU 163 AB 2014 216 258 0.9 7.31 8.88 G0V+G6V NO 211834.85+113408.2
21186+1134 BU 163 AB 2016 217 256 0.9 7.31 8.88 G0V+G6V NO 211834.85+113408.2
21186+1134 BU 163 AB 2017 223 258 0.9 7.31 8.88 G0V+G6V NO 211834.85+113408.2
21186+1134 BU 163 AB 2018 224 257 0.9 7.31 8.88 G0V+G6V NO 211834.85+113408.2
21186+1134 BU 163 AB 2021 229 257 1.0 7.31 8.88 G2.7V+G5V NO 211834.85+113408.2

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