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Doubles in session


Current system
20468+0733
GAA 8
HD 197952


Nearby doubles
30' : 20457+0709
BU 834

40' : 20487+0706
J 3223

48' : 20478+0818
UC 4291

48' : 20468+0821
GWP2998

50' : 20462+0822
SKF1867

57' : 20501+0802
GWP3003

60' : 20442+0648
SKF2552AB

65' : 20422+0724
J 571

66' : 20426+0714
TDT2489

67' : 20457+0838
A 1210

72' : 20516+0734
A 612

73' : 20504+0822
KPP4214

73' : 20516+0747
SKF1868

76' : 20464+0618
TDT2533

81' : 20504+0834
UC 4306

83' : 20421+0648
GWP2987

86' : 20478+0857
UC 4290

88' : 20459+0607
TDT2523

88' : 20446+0854
LDS1046

89' : 20527+0720
STF2733

94' : 20478+0600
BU 65

95' : 20511+0623
STF2730

100' : 20478+0555
TDT2543

103' : 20455+0553
HDS2954

104' : 20507+0859
TDT2574

106' : 20539+0730
TDT2613



Selections
Full WDS
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.

20468+0733 GAA 8 (HD 197952)

 
 
20h 46m 49.23s +07° 33' 10.4" P.A. 1.00 sep 0.0 mag 7.80,8.10 Sp F8 dist. 159.24 pc (519.44 l.y.)
 
 
Coord 2000 20468+0733 Discov num GAA   8 Comp Coord arcsec 2000 20 46 49.23 +07 33 10.4
Date first 2017 Date last 2017 Obs 4
Pa first 2 Pa last 1.3 P.A. Now (θ) 1.3°
Sep first 0.0 Sep last 0.005 Sep. Now (ρ) 0.005"
Mag pri 7.80 Mag sec 8.10 delta mag (ΔM) 0.3 Spectral class F8 (yellow-white)
Pri motion ra +011 Sec motion ra
Pri motion dec -027 Sec motion dec
Notes N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197952 Constellation Delphinus SAO 126201 HIP 102545
Tycho2 1089-00751-1 HD 197952 BD BD+07 4544 Distance 159.24
Distance ly 519.44
 
 
ORBITAL ELEMENTS
 
 
Period (P)99.269d± 0.0009 Periastron (T)5235.164d (1873.209y)± 0.07 Semi-major axis (a)3.508m± 0.013
Eccentricity (e)0.5197± 0.0004 Inclination (i)89.9°± 0.11 Longitude of periastron (ω)350°± 0.07
Node (Ω)181.41°± 0.14 Notesn ReferenceGaA2019
Equinox Last observation2017 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 1.4 0.005
2001-01-01 1.2 0.002
2002-01-01 1.6 0.002
2003-01-01 1.4 0.005
2004-01-01 1.3 0.002
2005-01-01 1.8 0.001
2006-01-01 1.4 0.005
2007-01-01 1.3 0.003
2008-01-01 180.9
2009-01-01 1.4 0.005
2010-01-01 1.3 0.004
2011-01-01 181.3 0.001
2012-01-01 1.4 0.005
2013-01-01 1.3 0.004
2014-01-01 181.4 0.002
2015-01-01 1.4 0.005
2016-01-01 1.4 0.005
2017-01-01 181.5 0.001
2018-01-01 1.5 0.004
2019-01-01 1.4 0.005
2020-01-01 181.9
2021-01-01 1.5 0.004
2022-01-01 1.4 0.005
2023-01-01 0.7
2024-01-01 1.5 0.003
2025-01-01 1.4 0.005
2026-01-01 1.2 0.001
2027-01-01 1.5 0.002
2028-01-01 1.4 0.005
2029-01-01 1.2 0.002
2030-01-01 1.7 0.001


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


 
  


wds20468%2B0733a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20468+0733 GAA 8 (HD 197952) : NOTES
 
 
discov_num notes refcode
GAA 8 NN Del.
Ma,Mb = 1.4445 +/- 0.0029, 1.3266 +/- 0.0021 \msun, GaA2019
orbital parallax = 5.953 +/- 0.023 mas.
 
 
REFERENCES
 
 
refcode metd author reference
GaA2019 Kv j Gallenne, A., Pietrzynski, G., Graczyk, D., Pilecki, B., Storm, J., Nardetto, N., 2019A&A...632A..31G
GaA2019 +orb Taormina, M., Gieren, W., Tkachenko, A., Kervella, P., Merand, A. & Weber, M.
GaA2019 A&A 632, A31, 2019
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20468+0733 GAA 8 2017 4 1 0.0 7.80 8.10 F8 NO K 204649.23+073310.4

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

 
 
WDS 20468+0733 GAA 8 (HD 197952) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20468+0733 GAA 8 (HD 197952) : MEASURES
 
 
No records found.

 
 
WDS 20468+0733 (HD 197952) : VIRTUAL EYEPIECE
 
 

20468+0733 GAA 8A mag 7.8 Sp F8 20468+0733 GAA 8B mag 8.1 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 20468+0733 (HD 197952) : ALADIN DSS IMAGE @ 20h 46m 49.23s +07° 33' 10.4"
 
 
 
 
WDS 20468+0733 GAA 8 (HD 197952) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20468+0733 GAA 8 distance=0' 20457+0709 BU 834 distance=30' 20487+0706 J 3223 distance=40' 20478+0818 UC 4291 distance=48' 20468+0821 GWP2998 distance=48' 20462+0822 SKF1867 distance=50' 20501+0802 GWP3003 distance=57' 20442+0648 SKF2552BC distance=60' 20442+0648 SKF2552AB distance=60' 20442+0648 SKF2552AC distance=60' 20422+0724 J 571 distance=65' 20426+0714 TDT2489 distance=66' 20457+0838 A 1210 distance=67' 20516+0734 A 612 distance=72' 20504+0822 KPP4214 distance=73' 20516+0747 SKF1868 distance=73' 20464+0618 TDT2533 distance=76' 20504+0834 UC 4306 distance=81' 20421+0648 GWP2987 distance=83' 20478+0857 UC 4290 distance=86' 20459+0607 TDT2523 distance=88' 20446+0854 LDS1046 distance=88' 20527+0720 STF2733 distance=89' 20478+0600 BU 65 distance=94' 20511+0623 STF2730 distance=95' 20478+0555 TDT2543 distance=100' 20455+0553 HDS2954 distance=103' 20507+0859 TDT2574 distance=104' 20539+0730 TDT2613 distance=106' 20473+0924 GWP2999 distance=111' 20533+0627 TDT2607 distance=118' 20537+0833 GWP3013 distance=118' 20543+0650 TDT2621 distance=120' 20388+0750 TDT2448 distance=120' 20496+0538 GWP3002 distance=123' 20552+0729 GWP3017 distance=125' 20399+0620 RAO 617 distance=127' 20546+0641 SLN 86 distance=127' 20539+0620 TDS1107 distance=129' 20500+0533 STTA210AB distance=130' 20500+0533 STTA210BC distance=131' 20550+0823 UC 4323 distance=132' 20519+0544 A 613 distance=133' 20540+0614 TDT2616 distance=133' 20554+0653 BRT2188 distance=134' 20556+0649 TDT2635 distance=138' 20560+0708 GWP3020 distance=139' 20386+0628 KPP 806 distance=139' 20454+0952 HEI 589 distance=141' 20562+0728 LDS4861 distance=141' 20533+0551 UC 4318 distance=142' 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 20468+0733 GAA 8 1 0.0
Show 20457+0709 BU 834 134 2.4 30
Show 20487+0706 J 3223 307 2.7 40
Show 20478+0818 UC 4291 7 46.1 48
Show 20468+0821 GWP2998 50 104.9 48
Show 20462+0822 SKF1867 357 6.1 50
Show 20501+0802 GWP3003 228 21.2 57
Show 20442+0648 SKF2552 BC 343 11.4 60
Show 20442+0648 SKF2552 AB 60 17.6 60
Show 20442+0648 SKF2552 AC 31 23.1 60
Show 20422+0724 J 571 255 3.9 65
Show 20426+0714 TDT2489 232 0.4 66
Show 20457+0838 A 1210 247 4.0 67
Show 20516+0734 A 612 7 2.0 72
Show 20504+0822 KPP4214 86 4.3 73
Show 20516+0747 SKF1868 313 57.7 73
Show 20464+0618 TDT2533 230 0.7 76
Show 20504+0834 UC 4306 296 42.5 81
Show 20421+0648 GWP2987 295 266.1 83
Show 20478+0857 UC 4290 5 86.8 86
Show 20459+0607 TDT2523 80 1.7 88
Show 20446+0854 LDS1046 344 15.0 88
Show 20527+0720 STF2733 145 40.2 89
Show 20478+0600 BU 65 200 1.5 94
Show 20511+0623 STF2730 333 3.3 95
Show 20478+0555 TDT2543 263 0.6 100
Show 20455+0553 HDS2954 298 1.0 103
Show 20507+0859 TDT2574 142 1.4 104
Show 20539+0730 TDT2613 69 0.6 106
Show 20473+0924 GWP2999 356 110.7 111
Show 20533+0627 TDT2607 281 0.6 118
Show 20537+0833 GWP3013 15 7.0 118
Show 20543+0650 TDT2621 4 1.7 120
Show 20388+0750 TDT2448 28 0.6 120
Show 20496+0538 GWP3002 247 57.2 123
Show 20552+0729 GWP3017 96 132.1 125
Show 20399+0620 RAO 617 334 2.5 127
Show 20546+0641 SLN 86 160 4.8 127
Show 20539+0620 TDS1107 110 1.6 129
Show 20500+0533 STTA210 AB 127 78.2 130
Show 20500+0533 STTA210 BC 222 12.4 131
Show 20550+0823 UC 4323 103 35.6 132
Show 20519+0544 A 613 324 0.7 133
Show 20540+0614 TDT2616 100 0.4 133
Show 20554+0653 BRT2188 46 4.2 134
Show 20556+0649 TDT2635 259 0.8 138
Show 20560+0708 GWP3020 179 6.7 139
Show 20386+0628 KPP 806 87 7.0 139
Show 20454+0952 HEI 589 257 1.8 141
Show 20562+0728 LDS4861 90 2.0 141
Show 20533+0551 UC 4318 168 33.0 142

 
 
WDS 20468+0733 : COMPONENTS
 
 
  A
B pa=1.3°
sep=0.00"
 
 
20468+0733 A
 
 
Componente originario normalizzato AB Name HD 197952 Coord arcsec 2000 204649.23+073310.4 Mag 7.8
Spectral class F8 (yellow-white) PmRA 11.00 PmDE -27.0
 
 
20468+0733 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204649.23+073310.4 Mag 8.1 SAO 126201
HIP 102545 Tycho2 1089-00751-1 HD 197952 BD BD+07 4544
Calc delta mag 0.3 Calc coord yes
Tycho2
Tycho2 1089-00751-1 Pflag RAmdeg 311.70510423 DEmdeg 7.55290436
PmRA 11.2 PmDE -25.4 E RAmdeg 7 E DEmdeg 8
E pmRA 1.8 E pmDE 1.8 EpRAm 1991.31 EpDEm 1991.05
Num 7 Q RAmdeg 0.7 Q DEmdeg 0.2 Q pmRA 0.7
Q pmDE 0.3 BTmag 9.047 E BTmag 0.018 VTmag 8.465
E VTmag 0.013 Prox 999 TYC T HIP 102545
CCDM RAdeg 311.70507889 DEdeg 7.55296389 EpRA 1990 1.76
EpDE 1990 1.55 E RAdeg 6.6 E DEdeg 8.1 Posflg
Corr 0.0
SAO
SAO 126201 DelFlag RA1950 PmRA1950 0.0014
DE1950 PmDE1950 -0.009 Vmag 8.5 SpType F8
Double code Source 32 CatNum 10344 DM BD+07 4544
DMcomp BDsup HD 197952 M HD 0
GC RA1950rad 5.42957219 DE1950rad 0.12861727 PmRA2000 0.0016
PmDE2000 -0.013
Hipparcos
Catalog H HIP 102545 Proxy RAhms 20 46 49.22
DEdms +07 33 10.7 Vmag 8.39 VarFlag 2 R Vmag H
RAdeg 311.705 DEdeg 7.55297 AstroRef Plx 5.71
CCDM N CCDM Nsys Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 197952 BD BD+07 4544
CD CP Dm number +07 4544 VIred 0.6
SpType F8 R SpType Coord arcsec 2000 204649.22+073310.7
Hipparcos 2
HIP 102545 Sn 5 So 0 Nc 1
RArad 5.4402799101 DErad 0.1318241159 Plx 6.28 PmRA 10.48
PmDE -27.06 E RArad 0.68 E DErad 0.45 E Plx 0.89
E pmRA 0.95 E pmDE 0.51 Hpmag 8.5115 E Hpmag 0.0017
SHp 0.016 VA 2 BV 0.552 E BV 0.017
VI 0.62