WDS 03124-4425 HJ 3556 AB,C (HD 20121) : NOTES
 
 
discov_num notes refcode
JC 5 Ma,Mb = 1.365 +/- 0.031, 1.134 +/- 0.024 \msun. GmJ2022
JC 8 Variable RV of AB, not explained by the visual motion, has been
reported (Eggen 1965), but Heintz's mass ratio does not support Egg1965b
the presence of a fourth body. Hei1979a
AB: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 2.59 +/- 0.73, 2.18, and 3.82 Msun, respectively. Mlk2012
HJ 3556 AB,C: Star C (mag. 9.2, 3.5") is in slow retrograde motion.
Heintz (1979) gives AB orbit, attempts AC orbit with P=987yr. Hei1979a
The motion of AC is not directed away from PM(A), hence physical. Tok2014d
 
 
REFERENCES
 
 
refcode metd author reference
Egg1965b - Eggen, O.J. 1965Obs....85..191E
Egg1965b Observatory 85, 191, 1965
GmJ2022 orb j Gomez, J., Docobo, J.A., Campo, P.P., Andrade, M., Mendez, R.A. & Costa, E. 2022MNRAS.509.4229G
GmJ2022 +not MNRAS 509, 4229, 2022
Hei1979a orb - Heintz, W.D. 1979PASP...91..356H
Hei1979a PASP 91, 356, 1979
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Tok2014d E2 - Tokovinin, A. 2014AJ....147...86T
Tok2014d AJ 147, 86, 2014
 
 
DISCOVERER
 
 
idgroup discov author
1 HJ Herschel, J.F.W.
50 JC Jacob, W.S.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
03124-4425 HJ 3556 AB,C 2009 66 190 3.9 6.42 8.76 F5V N 031225.68-442510.8
03124-4425 HJ 3556 AB,C 2013 66 189 3.8 6.42 8.76 F5V N 031225.68-442510.8
03124-4425 HJ 3556 AB,C 2017 68 188 3.7 6.42 8.76 F7III NV 031225.68-442510.8

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