WDS 19448+2916 EVS 42 AH : NOTES
 
 
discov_num notes refcode
ISM 4 The Cepheid SU Cyg. This is also known as WRH 23Aa,Ab. The Wilson
component were previously assigned to 19372+2920, but this was a
position error on Wilson's part leading to the the pairs not being WRH1950a
confirmed for many years. The wider components of Wilson will retain
their historical, AE, AF, and AG component identifiers. The closer
Aa,Ab pair will remain ISM 4. The problem was noted by Cliff
Ashcraft and the correct system found by James Daley.
Masses are 4.7 and 3.2 Msun. Estimated period = 1.5y,
a = 2.6au = 0.003". Evs2013
 
 
REFERENCES
 
 
refcode metd author reference
Evs2013 Hp j Evans, N.R., Bond, H.E., Schaefer, G.H., Mason, B.D., Karovska, M., & Tingle, E. 2013AJ....146...93E
Evs2013 +X AJ 146, 93, 2013
WRH1950a J j Wilson, R.H. 1950AJ.....55..153W
WRH1950a +Ma AJ 55, 153, 1950
WRH1950a (U and T coded observations per van den Bos, J Obs 34, 85, 1951) 1951JO.....34...85V
 
 
DISCOVERER
 
 
idgroup discov author
1 ISM Ismailov, R.M.
2 KRV Kervella, P., Thevenin, F., & Petr-Gotzens, M.G.
11 KRV Kervella, P., Gallenne, A., Evans, N.R., Szabados, L., Arenouu, F., Merand, A.,
11 KRV Proto, Y., Karczmarek, P., Nardetto, N., Gieren, W. & Pietrzynski, G.
12 KRV Kervella, P., Gallenne, A., Evans, N.R., Szabados, L., Arenouu, F., Merand, A.,
12 KRV Nardetto, N., Gieren, W. & Pietrzynski, G.
14 KRV Kervella, P., Borgniet, S., de Souza, A.D., Merand, A., Gallenne, A., Rivinius, T.,
14 KRV Lacour, S., Carciofi, A., Faes, D.M., Le Bouquin, J.-B., Taormina, M., Pilecki, B.,
14 KRV Berger, J.-P., Bendjoya, P., Klement, R., Millour, F., Janot-Pacheco, E., Spang, A.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19448+2916 EVS 42 AH 2011 1 87 25.2 6.90 16.90 F2Iab: NU 194448.74+291552.9
19448+2916 EVS 42 AH 2015 2 87 25.4 6.90 16.90 F2Iab: NU 194448.74+291552.9

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