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Doubles in session


Current system
20564-5916
I 129 AB
HD 198943


Nearby doubles
14' : 20574-5905
COO 241

46' : 20505-5911
UC 4307

51' : 20548-5827
B 2487

60' : 20496-5946
KPP2031

61' : 20514-6003
TDT2582

80' : 21006-5804
TSN 37

95' : 20470-5818
HU 1619

98' : 20442-5853
UC 4274

105' : 20545-6101
BVD 132AB

114' : 20445-5811
RST5158

118' : 21058-5744
HU 1625

119' : 20561-5718
BRT2828

120' : 21120-5916
B 518

130' : 21067-5735
TOI2201

131' : 21126-6003
I 258

134' : 20517-6125
HU 1622

138' : 21144-5916
TDT2848

139' : 20412-6034
UC 4256

146' : 21143-5831
B 519

147' : 20428-5737
WSI 136

158' : 21120-5737
HU 1627

160' : 21073-5702
HDS3009

162' : 21078-5702
HJ 5243AB

162' : 20372-5816
UC 4234AB

162' : 20379-6038
MUG 4AB

163' : 20415-6114
RST4673



Selections
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20564-5916 I 129 AB (HD 198943)

 
 
20h 56m 26.63s -59° 16' 25.0" P.A. 335.00 sep 2.6 mag 8.22,9.96 Sp G2V dist. 53.05 pc (173.05 l.y.)
 
 
Coord 2000 20564-5916 Discov num I   129 Comp AB Coord arcsec 2000 20 56 26.63 -59 16 25.0
Date first 1896 Date last 2016 Obs 17
Pa first 30 Pa last 334.6 P.A. Now (θ) 334.6°
Sep first 1.0 Sep last 2.647 Sep. Now (ρ) 2.647"
Mag pri 8.22 Mag sec 9.96 delta mag (ΔM) 1.74 Spectral class G2V (yellow)
Pri motion ra +001 Sec motion ra
Pri motion dec -037 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
20564-5916 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 198943 246799 20 56 27 -59 16 25 I 129 AB 2016 17 335 2.6 8.22 9.96 1.74 Y <===
Show 246799 20 56 27 -59 16 25 I 129 AC 2015 5 26 38.4 8.22 13.64 5.42
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 198943 Constellation Indus SAO 246799 HIP 103361
Tycho2 8804-00877-1 Gaia DR2 6456205770039152640 HD 198943 GC 29184
CP CP-59 7652 Distance 53.05 Distance ly 173.05
 
 
ORBITAL ELEMENTS
 
 
Period (P)1743.1208y± 789.291 Periastron (T)1763.6023y± 358.8003 Semi-major axis (a)11.62162a± 6.48778
Eccentricity (e)0.94298± 0.1285 Inclination (i)99.648°± 7.395 Longitude of periastron (ω)289.829°± 36.576
Node (Ω)90.748°± 40.556 Notes ReferenceIzm2019
Equinox Last observation2014 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 338.3 2.505
2001 338.1 2.515
2002 337.8 2.525
2003 337.6 2.536
2004 337.3 2.546
2005 337.1 2.556
2006 336.9 2.566
2007 336.6 2.577
2008 336.4 2.587
2009 336.2 2.598
2010 335.9 2.608
2011 335.7 2.619
2012 335.5 2.629
2013 335.3 2.640
2014 335.0 2.650
2015 334.8 2.661
2016 334.6 2.671
2017 334.4 2.682
2018 334.2 2.692
2019 334.0 2.703
2020 333.7 2.714
2021 333.5 2.724
2022 333.3 2.735
2023 333.1 2.746
2024 332.9 2.756
2025 332.7 2.767
2026 332.5 2.778
2027 332.3 2.789
2028 332.1 2.800
2029 331.9 2.810
2030 331.7 2.821


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds20564-5916a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20564-5916 I 129 AB (HD 198943) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
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 I Innes, R.T.A.
5 I MNRAS 57, 533, 1897 (data also in I__1897b,
5 I I__1897c)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20564-5916 I 129 AB 1991 14 341 2.4 8.22 9.96 G2V D 205626.63-591625.0
20564-5916 I 129 AB 2008 15 336 2.6 8.22 9.96 G2V D 205626.63-591625.0
20564-5916 I 129 AB 2014 16 335 2.6 8.22 9.96 G2V 205626.63-591625.0
20564-5916 I 129 AB 2016 17 335 2.6 8.22 9.96 G2V O 205626.63-591625.0

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 20564-5916 I 129 AB (HD 198943) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20564-5916 I 129 AB (HD 198943) : MEASURES
 
 
No records found.

 
 
WDS 20564-5916 (HD 198943) : VIRTUAL EYEPIECE
 
 

20564-5916 I 129A mag 8.22 Sp G2V 20564-5916 I 129B sep 2.5 P.A. 346.40 mag 9.96 20564-5916 I 129C sep 35.5 P.A. 14.00 mag 13.64 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 20564-5916 (HD 198943) : ALADIN DSS IMAGE @ 20h 56m 26.63s -59° 16' 25.0"
 
 
 
 
WDS 20564-5916 I 129 AB (HD 198943) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20564-5916 I 129AB distance=0' 20574-5905 TOK 701Ba,Bb distance=14' 20574-5905 COO 241 distance=14' 20505-5911 UC 4307 distance=46' 20548-5827 B 2487 distance=51' 20496-5946 KPP2031 distance=60' 20514-6003 TDT2582 distance=61' 21006-5804 TSN 37 distance=80' 20470-5818 HU 1619 distance=95' 20442-5853 UC 4274 distance=98' 20545-6101 BVD 132AB distance=105' 20545-6101 TDT2624Ba,Bb distance=106' 20445-5811 RST5158 distance=114' 21058-5744 HU 1625 distance=118' 20561-5718 BRT2828 distance=119' 21120-5916 B 518 distance=120' 21067-5735 TOI2201 distance=130' 21126-6003 I 258 distance=131' 20517-6125 HU 1622 distance=134' 21144-5916 TDT2848 distance=138' 20412-6034 UC 4256 distance=139' 21143-5831 B 519 distance=146' 20428-5737 WSI 136 distance=147' 21120-5737 HU 1627 distance=158' 21073-5702 HDS3009 distance=160' 21078-5702 HJ 5243AB distance=162' 21078-5702 CRU9014AC distance=162' 20372-5816 UC 4234AB distance=162' 20379-6038 MUG 4AB distance=162' 20379-6038 TOK 630AC distance=162' 20379-6038 EGN 25Ba,Bb distance=162' 20415-6114 RST4673 distance=163' 20540-6158 HDS2978 distance=163' 20516-5623 HJ 5223 distance=178' 20403-6132 TDT2462 distance=181' 20496-5622 BRT2827 distance=183' 21046-5621 RST1081 distance=188' 20516-6226 RMK 26AB distance=193' 20587-6234 B 1003 distance=199' 20559-5555 HJ 5232 distance=202' 21129-6218 TDT2830 distance=218' 20539-5535 B 505 distance=223' 21143-5615 HU 1534 distance=231' 20457-5542 TVB 316 distance=232' 20412-6242 R 323AB distance=234' 20412-6242 BAU 63AC distance=234' 20408-5559 HDS2948 distance=234' 21024-5525 BRT3187 distance=237' 21069-5529 HJ 5241 distance=243' 21042-5520 RST5552AB distance=245' 21042-5520 HJ 5239AB,C distance=245' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 20564-5916 I 129 AB 335 2.6
Show 20564-5916 I 129 AC 26 38.4
Show 20574-5905 TOK 701 Ba,Bb 219 0.1 14
Show 20574-5905 COO 241 260 3.7 14
Show 20505-5911 UC 4307 1 25.2 46
Show 20548-5827 B 2487 99 16.9 51
Show 20496-5946 KPP2031 85 16.2 60
Show 20514-6003 TDT2582 206 0.5 61
Show 21006-5804 TSN 37 300 16.4 80
Show 20470-5818 HU 1619 35 1.2 95
Show 20442-5853 UC 4274 345 11.7 98
Show 20545-6101 BVD 132 AB 175 70.7 105
Show 20545-6101 TDT2624 Ba,Bb 272 0.6 106
Show 20445-5811 RST5158 357 0.6 114
Show 21058-5744 HU 1625 288 0.1 118
Show 20561-5718 BRT2828 58 4.5 119
Show 21120-5916 B 518 141 0.3 120
Show 21067-5735 TOI2201 159 1.0 130
Show 21126-6003 I 258 154 0.6 131
Show 20517-6125 HU 1622 312 1.5 134
Show 21144-5916 TDT2848 118 2.2 138
Show 20412-6034 UC 4256 118 12.2 139
Show 21143-5831 B 519 29 0.6 146
Show 20428-5737 WSI 136 338 2.2 147
Show 21120-5737 HU 1627 201 1.5 158
Show 21073-5702 HDS3009 203 0.3 160
Show 21078-5702 HJ 5243 AB 96 24.4 162
Show 21078-5702 CRU9014 AC 271 226.1 162
Show 20372-5816 UC 4234 AB 131 9.3 162
Show 20379-6038 MUG 4 AB 175 10.8 162
Show 20379-6038 TOK 630 AC 52 743.3 162
Show 20379-6038 EGN 25 Ba,Bb 165 0.4 162
Show 20415-6114 RST4673 76 0.7 163
Show 20540-6158 HDS2978 352 0.6 163
Show 20516-5623 HJ 5223 110 9.0 178
Show 20403-6132 TDT2462 83 2.2 181
Show 20496-5622 BRT2827 114 4.5 183
Show 21046-5621 RST1081 215 0.1 188
Show 20516-6226 RMK 26 AB 78 2.4 193
Show 20587-6234 B 1003 138 0.5 199
Show 20559-5555 HJ 5232 3 27.8 202
Show 21129-6218 TDT2830 152 2.3 218
Show 20539-5535 B 505 108 0.1 223
Show 21143-5615 HU 1534 346 5.5 231
Show 20457-5542 TVB 316 165 3.1 232
Show 20412-6242 R 323 AB 319 2.9 234
Show 20412-6242 BAU 63 AC 266 9.1 234
Show 20408-5559 HDS2948 214 0.9 234
Show 21024-5525 BRT3187 212 5.1 237
Show 21069-5529 HJ 5241 40 12.6 243
Show 21042-5520 RST5552 AB 319 0.8 245

 
 
WDS 20564-5916 : COMPONENTS
 
 
  A B
B pa=346.4°
sep=2.46"
 
C pa=14.0°
sep=35.55"
pa=16.0°
sep=33.39"
 
 
20564-5916 A
 
 
Name HD 198943 Coord arcsec 2000 205626.63-591625.0 Mag 8.22 Spectral class G2V (yellow)
PmRA 1.00 PmDE -37.0 SAO 246799 HIP 103361
Tycho2 8804-00877-1 HD 198943 GC 29184 CP CP-59 7652
Tycho2
Tycho2 8804-00877-1 Pflag RAmdeg 314.11095987 DEmdeg -59.27370429
PmRA 1.1 PmDE -37.3 E RAmdeg 6 E DEmdeg 6
E pmRA 1.3 E pmDE 1.3 EpRAm 1990.94 EpDEm 1990.93
Num 12 Q RAmdeg 1.0 Q DEmdeg 2.8 Q pmRA 1.1
Q pmDE 2.8 BTmag 8.861 E BTmag 0.017 VTmag 8.221
E VTmag 0.012 Prox 24 TYC T HIP 103361
CCDM A RAdeg 314.11095556 DEdeg -59.27361806 EpRA 1990 1.62
EpDE 1990 1.56 E RAdeg 5.9 E DEdeg 6.3 Posflg D
Corr 0.0
SAO
SAO 246799 DelFlag RA1950 PmRA1950 0.0021
DE1950 PmDE1950 -0.035 Vmag 7.7 SpType G0
Double code Source 70 CatNum 29184 DM CP-59 7652
DMcomp BDsup HD 198943 M HD 0
GC 29184 RA1950rad 5.46515225 DE1950rad -1.03786755 PmRA2000 0.0014
PmDE2000 -0.038
Hipparcos
Catalog H HIP 103361 Proxy H RAhms 20 56 26.63
DEdms -59 16 25.0 Vmag 7.96 VarFlag R Vmag G
RAdeg 314.111 DEdeg -59.2736 AstroRef A Plx 18.97
CCDM 20564-5916 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 341 Rho 2.437 HD 198943 BD
CD CP CP-59 7652 Dm number -59 7652 VIred 0.71
SpType G2V R SpType Coord arcsec 2000 205626.63-591625.0
Hipparcos 2
HIP 103361 Sn 15 So 3 Nc 2
RArad 5.4822702601 DErad -1.0345197765 Plx 18.85 PmRA -2.51
PmDE -28.38 E RArad 0.73 E DErad 0.63 E Plx 1.09
E pmRA 0.87 E pmDE 0.64 Hpmag 8.0842 E Hpmag 0.0018
SHp 0.015 VA 0 BV 0.646 E BV 0.015
VI 0.71
CCDM
Ccdm 20564-5916 RComp Comp A Note1
Note2 Discov num DRAs 2.79 DDEs -25.8
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.0 Sp G0 PmNote *
PmRA 14 PmDE -35 Dm number -59 7652 Cat1 CPD
Name2 246799 Cat2 SAO HD 198943 M HD
ADS BDS M ADS BDS N IDS IDS 20486S5939A
HIC 103361
 
 
20564-5916 B
 
 
Coord arcsec 2000 205626.55-591622.6 Mag 9.96 Calc delta mag 1.74 Calc coord yes
CCDM
Ccdm 20564-5916 RComp Comp B Note1
Note2 Discov num I 129 DRAs DDEs
R dRAs Year 1959 Theta 351 Rho 2.0
Obs 8 Vmag 9.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 20486S5939B
HIC 103361
 
 
20564-5916 C
 
 
Coord arcsec 2000 205627.75-591550.5 Mag 13.64 PmRA -1.00 PmDE 7.0
Calc delta mag 5.42 Calc coord yes
CCDM
Ccdm 20564-5916 RComp Comp C Note1
Note2 Discov num I 129 DRAs DDEs
R dRAs Year 1927 Theta 029 Rho 35.8
Obs 1 Vmag 13.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 20486S5939C
HIC