WDS 23104+4901 STF 2987 (HD 218790) : NOTES
 
 
discov_num notes refcode
STF2987 NLTT 56040/56041 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.)
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
 
 
DISCOVERER
 
 
idgroup discov author
1 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
23104+4901 STF2987 2007 30 150 4.4 7.42 10.41 G1V N DV 231021.28+490106.0
23104+4901 STF2987 2011 38 150 4.2 7.42 10.41 G1V NV 231021.28+490106.0
23104+4901 STF2987 2016 39 154 3.4 7.42 10.41 G1V NV 231021.28+490106.0
23104+4901 STF2987 2017 44 150 4.2 7.42 10.41 G1V NOV 231021.28+490106.0
23104+4901 STF2987 2022 47 149 4.2 7.42 10.41 G1V NO V 231021.28+490106.0

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