WDS 17342-1910 TOK 418 AC (HD 159190) : NOTES
 
 
discov_num notes refcode
B 1863 AB + TOK 418AC: B 1863 is a known close binary which has been
unexpectedly found to be a triple. The new distant component C is
detectable also in the y filter, but we measured only the inner binary
in y. The star was observed at the Blanco telescope in 2008.5397, and
the pair actually measured then was AC, at 133.8deg, 0".217, dy =3.7.
The inner pair AB with a smaller dm was unresolved in 2008.5, while it
is clearly resolved now. Owing to the large distance from the Sun, we
expect only a slow motion, so even the inner pair observed since 1929
may not yet be ready for computing its first orbit. Tok2015c
 
 
REFERENCES
 
 
refcode metd author reference
Tok2015c orb+j Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. 2015AJ....150...50T
Tok2015c +St AJ 150, 50, 2015 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
DISCOVERER
 
 
idgroup discov author
1 B van den Bos, W.H.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17342-1910 TOK 418 AC 2014 1 134 0.2 8.70 12.00 F2V N 173409.17-191029.6
17342-1910 TOK 418 AC 2017 2 133 0.2 8.70 12.00 F2V N 173409.17-191029.6
17342-1910 TOK 418 AC 2018 4 137 0.2 8.70 12.00 F2V N 173409.17-191029.6
17342-1910 TOK 418 AC 2019 5 137 0.2 8.70 12.00 F2V N 173409.17-191029.6

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