WDS 19111+3847 STF 2481 A,BC (HD 179484) : NOTES
 
 
discov_num notes refcode
STF2481 Mt. Wilson spectral type of A is G4.
A,BC triple solution. Sod1999
H 2 68 Bu_1906
SE 2 Mt. Wilson spectral type of BC is K0.
SE 2 is the np component of STF 2481 (van den Bos). B__1925a
The pair BC is 4.5" Nf star A (mag. 8.4, G5) and is in slow B__1960b
retrograde motion about it. The combined light of B and C is
slightly brighter than that of A; thus the quadrant of A,BC
(= STF 2481) is sometimes confused.
BC: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 2.04 +/- 0.45, 2.02, and 0.95 Msun, respectively. Mlk2012
TAR 4 DE: 3' south of ADS 12145. Heintz identifies this with HLM 17 Hei1990b
(aka ADS 12149).
 
 
REFERENCES
 
 
refcode metd author reference
B__1925a Ma j van den Bos, W.H. 1925AnLei..143...1V
B__1925a Ann. Leiden Obs. 14, Pt.3, 1925
B__1960b Ma j van den Bos, W.H. 1960PYerO...9....1B
B__1960b +Mb Pub. Yerkes Obs. 9, pt. 1, 1960
Bu_1906 Ma j Burnham, S.W. 1906QB821.B972.....
Bu_1906 +M Burnham Double Star Cat., 1906
Hei1990b M+ j Heintz, W.D. 1990ApJS...74..275H
Hei1990b +Po ApJS 74, 275, 1990
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sod1999 orb - Soderhjelm, S. 1999A&A...341..121S
Sod1999 A&A 341, 121, 1999
 
 
DISCOVERER
 
 
idgroup discov author
1 SE Secchi, A.
30 STF Struve, F.G.W.
63 TAR Tarrant, K.J.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19111+3847 STF2481 A,BC 2006 243 19 4.4 8.39 8.31 G6V NVD 191107.90+384648.4
19111+3847 STF2481 A,BC 2010 244 20 4.6 8.39 8.31 G6V NVD 191107.90+384648.4
19111+3847 STF2481 A,BC 2012 247 20 4.6 8.39 8.31 G6V NVD 191107.90+384648.4
19111+3847 STF2481 A,BC 2013 252 20 4.7 8.39 8.31 G6V NV 191107.90+384648.4
19111+3847 STF2481 A,BC 2017 258 21 4.8 8.39 8.31 G6V NV 191107.90+384648.4
19111+3847 STF2481 A,BC 2019 259 18 4.8 8.39 8.31 G6V NV 191107.90+384648.4
19111+3847 STF2481 A,BC 2020 265 18 4.9 8.39 8.31 G6V NV 191107.90+384648.4
19111+3847 STF2481 A,BC 2021 267 18 4.7 8.39 8.31 G6V NV 191107.90+384648.4

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