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Current system
20536-7750
HDS 2977 AB
HD 197767


Nearby doubles
4' : 20541-7747
TDT2617

24' : 20567-7811
UC 4339

28' : 20593-7811
UC 4350AB

31' : 20533-7720
LDS 723

31' : 20442-7759
HDS2951

31' : 20442-7800
UC 4275

52' : 20375-7800
TDT2432

59' : 21082-7716
TDT2777

69' : 20482-7857
UC 4294

72' : 21051-7649
UC 4374

74' : 20425-7856
UC 4264

77' : 20381-7654
HJ 5199

79' : 21008-7906
KPP 705

83' : 20361-7651
KPP1878

119' : 20373-7938
SPM 39

123' : 21084-7559
I 257

133' : 20551-7538
WIS 344

137' : 20352-7550
LDS 713

148' : 21014-7525
HJ 5230

151' : 20475-8019
HDS2963

151' : 20365-7532
TDT2415

152' : 20522-7519
HJ 5214

155' : 20417-7521
DUN 232

155' : 21092-7525
TDT2788

171' : 20563-7500
UC 4337

176' : 21067-8042
GLI 263



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

20536-7750 HDS 2977 AB (HD 197767)

 
 
20h 53m 34.76s -77° 50' 18.6" P.A. 296.00 sep 0.1 mag 10.19,10.31 Sp G8V dist. 97.28 pc (317.33 l.y.)
 
 
Coord 2000 20536-7750 Discov num HDS2977 Comp AB Coord arcsec 2000 20 53 34.76 -77 50 18.6
Date first 1991 Date last 2021 Obs 9
Pa first 266 Pa last 296.1 P.A. Now (θ) 292.5°
Sep first 0.3 Sep last 0.123 Sep. Now (ρ) 0.157"
Mag pri 10.19 Mag sec 10.31 delta mag (ΔM) 0.12 Spectral class G8V (yellow)
Pri motion ra +050 Sec motion ra
Pri motion dec -057 Sec motion dec
Notes O W (Orbital solution, )
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197767 Constellation Octans SAO 257860 HIP 103118
Tycho2 9465-01119-1 HD 197767 CP CP-78 1348 Distance 97.28
Distance ly 317.33
 
 
ORBITAL ELEMENTS
 
 
Period (P)67.8y± 14.7 Periastron (T)2018.44y± 0.09 Semi-major axis (a)0.227a± 0.024
Eccentricity (e)0.825± 0.024 Inclination (i)111.7°± 2.8 Longitude of periastron (ω)225.6°± 2.4
Node (Ω)291.1°± 1.5 Notes ReferenceTok2021f
Equinox2000 Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 257.3 0.206
2001 255.9 0.196
2002 254.4 0.186
2003 252.6 0.176
2004 250.6 0.165
2005 248.4 0.154
2006 245.8 0.143
2007 242.7 0.131
2008 239.1 0.119
2009 234.6 0.108
2010 229.1 0.096
2011 222.1 0.085
2012 213.0 0.074
2013 201.2 0.065
2014 186.1 0.059
2015 168.4 0.055
2016 149.5 0.055
2017 130.8 0.055
2018 109.0 0.044
2019 9.2 0.018
2020 309.1 0.060
2021 299.6 0.099
2022 295.2 0.130
2023 292.5 0.157
2024 290.4 0.179
2025 288.8 0.199
2026 287.5 0.216
2027 286.3 0.231
2028 285.3 0.244
2029 284.4 0.256
2030 283.6 0.267


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


 
  


wds20536-7750a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20536-7750 HDS 2977 AB (HD 197767) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2021f orb - Tokovinin, A. 2021IAUDS.204....1T
Tok2021f Inf. Circ. 204, 1, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 HDS Hipparcos Double Star (from additional DD list)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20536-7750 HDS2977 AB 2019 6 312 0.1 10.19 10.31 G8V W 205334.76-775018.6
20536-7750 HDS2977 AB 2020 7 300 0.1 10.19 10.31 G8V W 205334.76-775018.6
20536-7750 HDS2977 AB 2021 9 296 0.1 10.19 10.31 G8V W 205334.76-775018.6

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

 
 
WDS 20536-7750 HDS 2977 AB (HD 197767) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20536-7750 HDS 2977 AB (HD 197767) : MEASURES
 
 
No records found.

 
 
WDS 20536-7750 (HD 197767) : VIRTUAL EYEPIECE
 
 

20536-7750 HDS2977A mag 10.19 Sp G8V 20536-7750 HDS2977B sep 0.1 P.A. 336.70 mag 10.31 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 20536-7750 (HD 197767) : ALADIN DSS IMAGE @ 20h 53m 34.76s -77° 50' 18.6"
 
 
 
 
WDS 20536-7750 HDS 2977 AB (HD 197767) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20536-7750 HDS2977AB distance=0' 20541-7747 TDT2617 distance=4' 20567-7811 UC 4339 distance=24' 20593-7811 UC 4350AB distance=28' 20533-7720 LDS 723 distance=31' 20442-7759 HDS2951 distance=31' 20442-7800 UC 4275 distance=31' 20375-7800 TDT2432 distance=52' 21082-7716 TDT2777 distance=59' 20482-7857 UC 4294 distance=69' 21051-7649 UC 4374 distance=72' 20425-7856 UC 4264 distance=74' 20381-7654 HJ 5199 distance=77' 21008-7906 KPP 705 distance=79' 20361-7651 KPP1878 distance=83' 20373-7938 SPM 39 distance=119' 21084-7559 I 257 distance=123' 20551-7538 WIS 344 distance=133' 20352-7550 LDS 713 distance=137' 21014-7525 HJ 5230 distance=148' 20475-8019 HDS2963 distance=151' 20365-7532 TDT2415 distance=151' 20522-7519 HJ 5214 distance=152' 20417-7521 DUN 232 distance=155' 21092-7525 TDT2788 distance=155' 20563-7500 UC 4337 distance=171' 21067-8042 GLI 263 distance=176' 20437-8104 WIS 342 distance=196' 21062-7426 UC 4380 distance=210' 21054-8124 HDS3008 distance=216' 20525-7412 TDT2596 distance=219' 21123-8129 YMG 92 distance=224' 21042-7353 UC 4370 distance=241' 21089-7353 GLI 268 distance=244' 20366-7354 TDT2418 distance=245' 21007-7338 HEI 590 distance=254' 21086-7337 HEI 591 distance=260' 20505-8216 KPP4215 distance=266' 21062-7316 HJ 5237 distance=278' 21094-7310 I 379AB distance=286' 21094-7310 HDO 305AB,C distance=286' 20442-7301 HEI 280 distance=293' 21127-7258 FIN 280 distance=301' 20390-7254 TDT2452 distance=301' 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 20536-7750 HDS2977 AB 296 0.1
Show 20541-7747 TDT2617 32 0.8 4
Show 20567-7811 UC 4339 162 9.9 24
Show 20593-7811 UC 4350 AB 51 16.8 28
Show 20533-7720 LDS 723 163 27.8 31
Show 20442-7759 HDS2951 332 0.0 31
Show 20442-7800 UC 4275 95 7.5 31
Show 20375-7800 TDT2432 221 3.7 52
Show 21082-7716 TDT2777 17 1.5 59
Show 20482-7857 UC 4294 309 25.4 69
Show 21051-7649 UC 4374 329 49.2 72
Show 20425-7856 UC 4264 73 42.0 74
Show 20381-7654 HJ 5199 211 26.8 77
Show 21008-7906 KPP 705 351 6.2 79
Show 20361-7651 KPP1878 243 14.6 83
Show 20373-7938 SPM 39 81 18.3 119
Show 21084-7559 I 257 313 1.9 123
Show 20551-7538 WIS 344 111 484.9 133
Show 20352-7550 LDS 713 230 80.3 137
Show 21014-7525 HJ 5230 163 15.5 148
Show 20475-8019 HDS2963 15 0.3 151
Show 20365-7532 TDT2415 343 0.7 151
Show 20522-7519 HJ 5214 304 13.5 152
Show 20417-7521 DUN 232 19 16.6 155
Show 21092-7525 TDT2788 155 2.2 155
Show 20563-7500 UC 4337 203 79.7 171
Show 21067-8042 GLI 263 244 4.8 176
Show 20437-8104 WIS 342 61 714.6 196
Show 21062-7426 UC 4380 83 72.7 210
Show 21054-8124 HDS3008 62 0.0 216
Show 20525-7412 TDT2596 164 0.8 219
Show 21123-8129 YMG 92 131 0.1 224
Show 21042-7353 UC 4370 258 10.4 241
Show 21089-7353 GLI 268 243 5.6 244
Show 20366-7354 TDT2418 336 0.4 245
Show 21007-7338 HEI 590 257 0.4 254
Show 21086-7337 HEI 591 5 0.2 260
Show 20505-8216 KPP4215 26 3.6 266
Show 21062-7316 HJ 5237 274 5.9 278
Show 21094-7310 I 379 AB 22 0.1 286
Show 21094-7310 HDO 305 AB,C 118 6.4 286
Show 20442-7301 HEI 280 104 0.8 293
Show 21127-7258 FIN 280 55 2.5 301
Show 20390-7254 TDT2452 215 0.7 301

 
 
WDS 20536-7750 : COMPONENTS
 
 
  A
B pa=336.7°
sep=0.06"
 
 
20536-7750 A
 
 
Name HD 197767 Coord arcsec 2000 205334.76-775018.6 Mag 10.19 Spectral class G8V (yellow)
PmRA 50.00 PmDE -57.0 SAO 257860 HIP 103118
Tycho2 9465-01119-1 HD 197767 CP CP-78 1348
Tycho2
Tycho2 9465-01119-1 Pflag RAmdeg 313.39544959 DEmdeg -77.83863239
PmRA 50.8 PmDE -55.2 E RAmdeg 12 E DEmdeg 12
E pmRA 1.3 E pmDE 1.3 EpRAm 1989.78 EpDEm 1990.31
Num 10 Q RAmdeg 0.8 Q DEmdeg 0.9 Q pmRA 0.8
Q pmDE 0.9 BTmag 10.261 E BTmag 0.026 VTmag 9.457
E VTmag 0.018 Prox 999 TYC T HIP 103118
CCDM AB RAdeg 313.39488667 DEdeg -77.83850556 EpRA 1990 1.61
EpDE 1990 1.74 E RAdeg 12.4 E DEdeg 12.0 Posflg P
Corr 0.1
SAO
SAO 257860 DelFlag RA1950 PmRA1950 0.01
DE1950 PmDE1950 -0.08 Vmag 9 SpType G
Double code Source 61 CatNum 4456 DM CP-78 1348
DMcomp BDsup HD 197767 M HD 0
GC RA1950rad 5.44179164 DE1950rad -1.36182393 PmRA2000 0.0073
PmDE2000 -0.083
Hipparcos
Catalog H HIP 103118 Proxy H RAhms 20 53 34.76
DEdms -77 50 18.6 Vmag 9.36 VarFlag R Vmag H
RAdeg 313.395 DEdeg -77.8385 AstroRef * Plx 10.67
CCDM 20536-7750 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 266 Rho 0.272 HD 197767 BD
CD CP CP-78 1348 Dm number -78 1348 VIred 0.73
SpType G8V R SpType Coord arcsec 2000 205334.76-775018.6
Hipparcos 2
HIP 103118 Sn 55 So 3 Nc 2
RArad 5.4697720392 DErad -1.3585380361 Plx 10.28 PmRA 50.57
PmDE -56.83 E RArad 0.94 E DErad 0.83 E Plx 1.17
E pmRA 1.15 E pmDE 0.91 Hpmag 9.4964 E Hpmag 0.0021
SHp 0.022 VA 0 BV 0.737 E BV 0.024
VI 0.78
CCDM
Ccdm 20536-7750 RComp Comp A Note1
Note2 Discov num DRAs -1.05 DDEs -19.1
R dRAs 82 Year Theta Rho
Obs 2 Vmag 10.2 Sp G8 PmNote *
PmRA 50 PmDE -57 Dm number -78 1348 Cat1 CPD
Name2 257860 Cat2 SAO HD 197767 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 103118
 
 
20536-7750 B
 
 
Coord arcsec 2000 205334.75-775018.5 Mag 10.31 Calc delta mag 0.12 Calc coord yes
CCDM
Ccdm 20536-7750 RComp Comp B Note1
Note2 Discov num HDS DRAs -1.14 DDEs -19.1
R dRAs 82 Year 1991 Theta 266 Rho 0.3
Obs 1 Vmag 10.3 Sp PmNote *
PmRA 50 PmDE -57 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 103118