WDS 12423+7510 LDS 1755 : NOTES
 
 
discov_num notes refcode
LDS1755 ZUC 10. Primary is white dwarf PG 1240+754 = LB 261. Zuc1992
NLTT 31644/31647 Chm2004
 
 
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.)
Zuc1992 Ci j Zuckerman, B. & Becklin, E.E. 1992ApJ...386..260Z
Zuc1992 ApJ 386, 260, 1992
Zuc1992 (IR imaging using IRTF 3.0m + ProtoCam; U. Hawaii 2.2m, UKIRT + IRCAM, NOAO 2.1m +
Zuc1992 IRIM, Steward 2.3m + NICMOS, CTIO 4m. Rho and theta derived from quoted RA and DEC
Zuc1992 differences. Dates estimated to nearest decade given for a few measures without
Zuc1992 explicitly quoted dates.)
 
 
DISCOVERER
 
 
idgroup discov author
1 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
12423+7510 LDS1755 1975 3 127 6.1 16.38 16.89 N 124202.22+750845.4
12423+7510 LDS1755 1999 6 126 6.0 16.38 16.89 DA NV 124203.56+750842.0
12423+7510 LDS1755 2004 7 126 6.1 15.80 15.80 DA NV R 124201.93+750845.3
12423+7510 LDS1755 2015 8 126 6.1 15.80 15.80 DA NV R 124201.93+750845.3
12423+7510 LDS1755 2016 16 126 6.1 14.90 15.70 DA NV 124202.19+750845.4

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