WDS 18339+5221 STF 2348 AB,C (HD 171779) : NOTES
 
 
discov_num notes refcode
A 1377 Mt. Wilson spectral classes A is G5, C is B8n.
AB. This appears to be part of a triple system. The elements given by
Wilson (1950) and by Baize (1958) are different, possibly due to the WRH1950b
long period of the system. This 1975.533 separation is less than that Baz1958
derived from either ephemeris but it and the position angle are closer
to Baize's values. BLM1978
2003.6: Differential astrometry by Lane & Muterspaugh (2004) was Lne2004
originally published as follows, but converted to BY, rho, and theta
by WIH for inclusion in our catalogs:
MJD dRA (arcsec) dDEC (arcsec)
52862.30085 0.222109 +/- 0.000143 -0.119309 +/- 0.00000839
52863.28229 0.222233 +/- 0.000143 -0.119302 +/- 0.0000155
52864.31096 0.222134 +/- 0.000197 -0.119323 +/- 0.0000189
52865.29921 0.221981 +/- 0.000155 -0.119361 +/- 0.0000148
AB: Additional notes may be found in Wilson (1955). WRH1955
 
 
REFERENCES
 
 
refcode metd author reference
Baz1958 orb - Baize, P. 1958JO.....41..163B
Baz1958 J. Obs. 41, 163-183, 1958
BLM1978 S j Morgan, B.L., Beddoes, D.R., Scaddan, R.J. & Dainty, J.C. 1978MNRAS.183..701M
BLM1978 MNRAS 183, 701, 1978
Lne2004 Kp j Lane, B.F. & Muterspaugh, M.W. 2004ApJ...601.1129L
Lne2004 ApJ 601, 1129, 2004
WRH1950b Ma - Wilson, R.H. 1950AJ.....55..159W
WRH1950b +J AJ 55, 159, 1950
WRH1950b +orb
WRH1955 J j Wilson, R.H. 1955AJ.....60..446W
WRH1955 +Ma AJ 60, 446, 1955
 
 
DISCOVERER
 
 
idgroup discov author
1 A Aitken, R.G.
312 SLE Soulie, G.
331 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
18339+5221 STF2348 AB,C 2009 60 263 24.7 5.50 8.65 N D 183356.69+522112.6
18339+5221 STF2348 AB,C 2011 61 271 25.7 5.50 8.65 N D 183356.69+522112.6
18339+5221 STF2348 AB,C 2012 63 271 25.7 5.50 8.65 N D 183356.69+522112.6

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