WDS 21161+2951 BWL 56 Aa,Ab : NOTES
 
 
discov_num notes refcode
LDS1053 NLTT 50902/50901 Chm2004
Luyten measure flipped around the E/W line: pa 282 -> 258. Luy1969
 
 
REFERENCES
 
 
refcode metd author reference
Chm2004 E - Chaname, J. & Gould, A. 2004ApJ...601..289C
Chm2004 ApJ 601, 289, 2004
Chm2004 (Photometry, coordinates, and astrometry from rNLTT. Astrometry from early
Chm2004 versions of 2MASS and UCAC, with date given only as "circa 2000". Measures
Chm2004 identical to discovery observations - predominantly close pairs - were assumed
Chm2004 not new observations, so not included in WDS. Similar concerns when primary and
Chm2004 secondary magnitudes or proper motions were the same.)
Luy1969 Po - Luyten, W.J. 1969PMMin..21....1L
Luy1969 Univ. Minnesota Proper Motion Survey #21, 1969
Luy1969 (CPM pairs found by comparison of Palomar 48-inch Schmidt plates. First and second
Luy1969 plates epochs were 1950-1955 and 1963-1967, so a default mean date of 1960 was
Luy1969 assigned to all measures for LDS 859 and later not having more precisely known
Luy1969 dates. LDS 833 - 858 were measured from Bruce PM plates - see note to Luy1941
Luy1969 reference.)
 
 
DISCOVERER
 
 
idgroup discov author
1 BWL Bowler, B.P., Liu, M.C., Shkolnik, E.L., Dupuy, T.J., Cieza, L.A., Kraus, A.L., &
1 BWL Tamura, M.
10 BWL Bowler, B.P., Shkolnik, E.L., Liu, M.C., Schlieder, J.E., Mann, A.W., Dupuy, T.J.,
10 BWL Hinkley, S., Crepp, J., Johnson, J., Howard, A., Flagg, L., Weinberger, A., et al.
11 BWL Bowler, B.P., Dupuy, T.J., Endl, M., Cochran, W.D., MacQueen, P.J., Fulton, B.J.,
11 BWL Petigura, E.A., Howard, A.W., Hirsch, L., Kratter, K.M., Crepp, J.R., Biller, B.A.,
11 BWL Johnson, M.C. & Wittenmyer, R.A.
13 LDS Luyten p.m. catalog (from additional DD list)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21161+2951 BWL 56 Aa,Ab 2011 2 48 0.0 8.50 8.80 M4.0 K 211605.81+295150.8
21161+2951 BWL 56 Aa,Ab 2018 5 163 0.1 8.50 8.80 M4.0 N K 211605.81+295150.8

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