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Current system
20239-4225
BU 763 AB
Kap2 Sgr


Nearby doubles
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I 1420

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UC 4190

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WSP 110AB

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WG 255

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CPO 616

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HJ 5201

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RSS 547

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BRT1108

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DON 988AB

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KPP1654

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NSN 481

122' : 20348-4244
AOT 80

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KPP2109

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AOT 81

124' : 20331-4116
BRT1111

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GLI 259AB

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AOT 82

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AOT 83

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TDT2223

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B 490

139' : 20149-4403
SKF1164



Selections
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Binary Systems
Triple Systems
Quadruple Systems
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20239-4225 BU 763 AB (Kap2 Sgr)

 
 
20h 23m 53.17s -42° 25' 22.2" P.A. 180.00 sep 0.5 mag 5.67,7.25 Sp A5V dist. 95.51 pc (311.55 l.y.)
 
 
Coord 2000 20239-4225 Discov num BU  763 Comp AB Coord arcsec 2000 20 23 53.17 -42 25 22.2
Date first 1874 Date last 2021 Obs 55
Pa first 225 Pa last 179.7 P.A. Now (θ) 182.8°
Sep first 1.5 Sep last 0.488 Sep. Now (ρ) 0.529"
Mag pri 5.67 Mag sec 7.25 delta mag (ΔM) 1.58 Spectral class A5V (white)
Pri motion ra -006 Sec motion ra -006
Pri motion dec +024 Sec motion dec +024
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20239-4225 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Kap2 Sgr 230184 20 23 53 -42 25 22 BU 763 AB 2021 55 180 0.5 5.67 7.25 1.58 Y <===
Show 230184 20 23 53 -42 25 22 I 1626 AC 1998 2 268 18.6 5.67 14.30 8.63
Show 230184 20 23 53 -42 25 22 SEE 511 AD 2000 4 219 29.8 5.67 14.00 8.33
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Kap2 Sgr Constellation Sagittarius SAO 230184 HIP 100591
Tycho2 7957-01410-1 Gaia DR2 6679362821813065856 HD 193807 HR 7787
GC 28341 CD CD-4214847 CP CP-42 9068 Bayer Kappa 2 Sagittarii
Bayer name Kap2 Sgr Distance 95.51 Distance ly 311.55 Bayer greek κ2 Sgr
 
 
ORBITAL ELEMENTS
 
 
Period (P)180.2y± 2.7 Periastron (T)2003.82y± 0.09 Semi-major axis (a)0.609a± 0.006
Eccentricity (e)0.806± 0.003 Inclination (i)32.1°± 1.2 Longitude of periastron (ω)181.8°± 1.9
Node (Ω)216.3°± 1.7 Notesn ReferenceTok2021f
Equinox2000 Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 316.7 0.165
2001 332.3 0.145
2002 352.3 0.129
2003 16.3 0.121
2004 42.6 0.118
2005 68.7 0.122
2006 91.9 0.133
2007 110.5 0.151
2008 124.8 0.173
2009 135.6 0.199
2010 144.0 0.225
2011 150.5 0.251
2012 155.9 0.278
2013 160.3 0.304
2014 164.0 0.329
2015 167.1 0.354
2016 169.9 0.378
2017 172.4 0.402
2018 174.5 0.424
2019 176.5 0.447
2020 178.3 0.468
2021 179.9 0.489
2022 181.4 0.509
2023 182.8 0.529
2024 184.1 0.548
2025 185.2 0.567
2026 186.4 0.585
2027 187.4 0.603
2028 188.4 0.620
2029 189.4 0.637
2030 190.2 0.653


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


 
  


wds20239-4225b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20239-4225 BU 763 AB (Kap2 Sgr) : NOTES
 
 
discov_num notes refcode
BU 763 kap 2 Sgr
 
 
REFERENCES
 
 
refcode metd author reference
Tok2021f orb - Tokovinin, A. 2021IAUDS.204....1T
Tok2021f Inf. Circ. 204, 1, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 I Innes, R.T.A.
183 I MNRAS 57, 533, 1897 (data also in I__1897b,
183 I I__1897c)
269 SEE See, T.J.J.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20239-4225 BU 763 AB 1992 47 268 0.4 5.93 7.25 A5V NOD 202353.19-422522.5
20239-4225 BU 763 AB 2008 48 317 0.2 5.93 7.25 A5V NOD 202353.19-422522.5
20239-4225 BU 763 AB 2013 50 345 0.3 5.67 7.25 A5V NO 202353.17-422522.2
20239-4225 BU 763 AB 2016 53 352 0.4 5.67 7.25 A5V NO 202353.17-422522.2
20239-4225 BU 763 AB 2017 54 174 0.4 5.67 7.25 A5V NO 202353.17-422522.2
20239-4225 BU 763 AB 2021 55 180 0.5 5.67 7.25 A5V NO 202353.17-422522.2

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

 
 
WDS 20239-4225 BU 763 AB (Kap2 Sgr) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20239-4225 BU 763 AB (Kap2 Sgr) : MEASURES
 
 
No records found.

 
 
WDS 20239-4225 (Kap2 Sgr) : VIRTUAL EYEPIECE
 
 

20239-4225 BU 763A mag 5.67 Sp A5V 20239-4225 BU 763B sep 0.5 P.A. 179.80 mag 7.25 20239-4225 I 1626C sep 13.8 P.A. 266.90 mag 14.3 20239-4225 SEE 511D sep 27.0 P.A. 211.10 mag 14 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 20239-4225 (Kap2 Sgr) : ALADIN DSS IMAGE @ 20h 23m 53.17s -42° 25' 22.2"
 
 
 
 
WDS 20239-4225 BU 763 AB (Kap2 Sgr) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20239-4225 BU 763AB distance=0' 20240-4231 DON 984 distance=6' 20225-4203 HJ 5190AB distance=28' 20225-4203 HJ 5190AC distance=28' 20280-4237 RSS 36 distance=47' 20235-4319 TDT2231 distance=55' 20267-4334 I 1420 distance=76' 20276-4110 UC 4190 distance=87' 20235-4404 WSP 110AB distance=99' 20235-4404 WSP 110AC distance=99' 20235-4044 WG 255 distance=103' 20148-4258 CPO 616 distance=106' 20289-4402 HJ 5201 distance=112' 20276-4038 RSS 547 distance=116' 20258-4420 BRT1108 distance=117' 20344-4221 DON 988AB distance=117' 20344-4221 DON 988AB,C distance=117' 20151-4332 KPP1654 distance=117' 20345-4216 NSN 481 distance=118' 20348-4244 AOT 80 distance=122' 20190-4037 KPP2109 distance=122' 20351-4226 AOT 81 distance=124' 20331-4116 BRT1111 distance=124' 20247-4019 KPP 968 distance=127' 20319-4054 GLI 259AB distance=128' 20319-4054 I 1627AC distance=128' 20355-4241 AOT 82 distance=130' 20356-4243 AOT 83 distance=132' 20228-4437 TDT2223 distance=132' 20337-4104 B 490 distance=137' 20149-4403 SKF1164 distance=139' 20125-4130 RST2136 distance=139' 20360-4147 AOT 84 distance=140' 20140-4053 SKF1163 distance=144' 20370-4208 AOT 86 distance=147' 20178-4011 DUN 230 distance=151' 20374-4202 CPO 89 distance=152' 20266-3955 SCT 2 distance=154' 20377-4236 UC 4238 distance=154' 20185-4000 B 474AB distance=157' 20185-4000 WG 254AC distance=157' 20338-4033 JC 18AB distance=158' 20338-4033 JC 18AC distance=158' 20296-4000 UC 4200 distance=159' 20174-4004 WG 252 distance=160' 20381-4251 UC 4240 distance=160' 20243-3944 HDS2917 distance=162' 20199-4503 NSN 480 distance=164' 20339-4431 I 127AB distance=167' 20339-4431 DAM 325AD distance=167' 20339-4431 DAM 325AE distance=167' 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 20239-4225 BU 763 AB 180 0.5
Show 20239-4225 I 1626 AC 268 18.6
Show 20239-4225 SEE 511 AD 219 29.8
Show 20240-4231 DON 984 258 0.9 6
Show 20225-4203 HJ 5190 AB 312 40.0 28
Show 20225-4203 HJ 5190 AC 283 56.8 28
Show 20280-4237 RSS 36 267 35.7 47
Show 20235-4319 TDT2231 227 0.8 55
Show 20267-4334 I 1420 358 0.3 76
Show 20276-4110 UC 4190 62 27.4 87
Show 20235-4404 WSP 110 AB 114 4.6 99
Show 20235-4404 WSP 110 AC 203 23.5 99
Show 20235-4044 WG 255 33 5.3 103
Show 20148-4258 CPO 616 312 5.8 106
Show 20289-4402 HJ 5201 117 10.7 112
Show 20276-4038 RSS 547 12 10.0 116
Show 20258-4420 BRT1108 191 12.3 117
Show 20344-4221 DON 988 AB 118 0.6 117
Show 20344-4221 DON 988 AB,C 89 23.2 117
Show 20151-4332 KPP1654 179 12.7 117
Show 20345-4216 NSN 481 91 1.7 118
Show 20348-4244 AOT 80 246 11.1 122
Show 20190-4037 KPP2109 91 17.1 122
Show 20351-4226 AOT 81 185 14.1 124
Show 20331-4116 BRT1111 162 4.3 124
Show 20247-4019 KPP 968 335 7.9 127
Show 20319-4054 GLI 259 AB 159 4.1 128
Show 20319-4054 I 1627 AC 346 17.6 128
Show 20355-4241 AOT 82 201 4.2 130
Show 20356-4243 AOT 83 116 7.8 132
Show 20228-4437 TDT2223 124 2.5 132
Show 20337-4104 B 490 64 1.2 137
Show 20149-4403 SKF1164 209 66.7 139
Show 20125-4130 RST2136 48 0.6 139
Show 20360-4147 AOT 84 137 18.9 140
Show 20140-4053 SKF1163 12 8.5 144
Show 20370-4208 AOT 86 303 9.1 147
Show 20178-4011 DUN 230 117 9.7 151
Show 20374-4202 CPO 89 284 16.0 152
Show 20266-3955 SCT 2 319 28.4 154
Show 20377-4236 UC 4238 182 83.6 154
Show 20185-4000 B 474 AB 28 3.3 157
Show 20185-4000 WG 254 AC 20 14.3 157
Show 20338-4033 JC 18 AB 224 4.4 158
Show 20338-4033 JC 18 AC 145 108.0 158
Show 20296-4000 UC 4200 302 40.7 159
Show 20174-4004 WG 252 99 3.3 160
Show 20381-4251 UC 4240 351 45.0 160
Show 20243-3944 HDS2917 204 12.3 162
Show 20199-4503 NSN 480 216 11.3 164
Show 20339-4431 I 127 AB 50 62.3 167

 
 
WDS 20239-4225 : COMPONENTS
 
 
  A B C
B pa=179.8°
sep=0.49"
 
C pa=266.9°
sep=13.75"
pa=268.9°
sep=13.73"
 
D pa=211.1°
sep=26.96"
pa=211.6°
sep=26.55"
pa=180.5°
sep=22.36"
 
 
20239-4225 A
 
 
Name Kap2 Sgr Coord arcsec 2000 202353.17-422522.2 Mag 5.67 Spectral class A5V (white)
PmRA -6.00 PmDE 24.0 SAO 230184 HIP 100591
Tycho2 7957-01410-1 HD 193807 HR 7787 GC 28341
CD CD-4214847 CP CP-42 9068 Bayer Kappa 2 Bayer name Kap2
Tycho2
Tycho2 7957-01410-1 Pflag RAmdeg 305.97156319 DEmdeg -42.42284643
PmRA -5.6 PmDE 24.4 E RAmdeg 3 E DEmdeg 4
E pmRA 0.9 E pmDE 1.1 EpRAm 1991.50 EpDEm 1991.32
Num 13 Q RAmdeg 2.0 Q DEmdeg 1.2 Q pmRA 1.9
Q pmDE 1.2 BTmag 5.881 E BTmag 0.014 VTmag 5.668
E VTmag 0.009 Prox 999 TYC T HIP 100591
CCDM AB RAdeg 305.97158083 DEdeg -42.42290361 EpRA 1990 1.75
EpDE 1990 1.55 E RAdeg 3.3 E DEdeg 3.5 Posflg P
Corr -0.2
SAO
SAO 230184 DelFlag RA1950 PmRA1950 0
DE1950 PmDE1950 0.025 Vmag 5.7 SpType A3
Double code Source 70 CatNum 28341 DM CD-4214847
DMcomp BDsup HD 193807 M HD 0
GC 28341 RA1950rad 5.32540524 DE1950rad -0.74324962 PmRA2000 0
PmDE2000 0.022
Hipparcos
Catalog H HIP 100591 Proxy H RAhms 20 23 53.19
DEdms -42 25 22.5 Vmag 5.64 VarFlag R Vmag G
RAdeg 305.972 DEdeg -42.4229 AstroRef A Plx 8.8
CCDM 20239-4225 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 265 Rho 0.381 HD 193807 BD
CD CD-4214847 CP CP-42 9068 Dm number -4214847 VIred 0.24
SpType A3V R SpType Coord arcsec 2000 202353.19-422522.5
Hipparcos 2
HIP 100591 Sn 15 So 3 Nc 2
RArad 5.3402120549 DErad -0.7404193653 Plx 10.47 PmRA -13.07
PmDE 13.64 E RArad 0.46 E DErad 0.26 E Plx 0.5
E pmRA 0.73 E pmDE 0.39 Hpmag 5.699 E Hpmag 0.001
SHp 0.008 VA 0 BV 0.201 E BV 0.009
VI 0.24
CCDM
Ccdm 20239-4225 RComp Comp A Note1
Note2 Discov num DRAs -0.83 DDEs -22.3
R dRAs 10 Year Theta Rho
Obs 4 Vmag 6.1 Sp A3 PmNote *
PmRA -5 PmDE 26 Dm number -4214847 Cat1 CD
Name2 230184 Cat2 SAO HD 193807 M HD
ADS BDS B10139 M ADS BDS N IDS IDS 20171S4245A
HIC 100591
 
 
20239-4225 B
 
 
Coord arcsec 2000 202353.17-422522.7 Mag 7.25 PmRA -6.00 PmDE 24.0
Calc delta mag 1.58 Calc coord yes
CCDM
Ccdm 20239-4225 RComp Comp B Note1
Note2 Discov num BU 763 DRAs DDEs
R dRAs Year 1952 Theta 234 Rho 0.8
Obs 28 Vmag 7.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS B10139 M ADS BDS N IDS IDS 20171S4245B
HIC 100591
 
 
20239-4225 C
 
 
Coord arcsec 2000 202351.93-422522.9 Mag 14.3 Calc delta mag 8.63 Calc coord yes
CCDM
Ccdm 20239-4225 RComp Comp C Note1
Note2 Discov num I DRAs DDEs
R dRAs Year Theta 270 Rho 15.0
Obs Vmag 15.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS B10139 M ADS BDS N IDS IDS 20171S4245C
HIC
 
 
20239-4225 D
 
 
Coord arcsec 2000 202351.91-422545.3 Mag 14 PmRA 4.00 PmDE -19.0
Calc delta mag 8.33 Calc coord yes
CCDM
Ccdm 20239-4225 RComp Comp D Note1
Note2 Discov num SEE DRAs DDEs
R dRAs Year 1897 Theta 226 Rho 29.3
Obs 1 Vmag 14.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS B10139 M ADS BDS N IDS IDS 20171S4245D
HIC