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Current system
20436+1944
STF 2722
HD 197518


Nearby doubles
10' : 20435+1953
STF2721

11' : 20444+1945
CAR 2

17' : 20448+1943
COU 424

23' : 20422+1952
LBU 19AB

29' : 20419+1931
COU 226AB

30' : 20423+1921
SHN 39

43' : 20410+2001
HJ 2987

43' : 20408+1956
BUP 215AB

49' : 20433+1855
TDS1094

51' : 20447+2032
BRT2484

52' : 20466+1915
COU 426

53' : 20412+2023
COU 423

54' : 20467+1913
GWP2997

56' : 20471+1918
HO 141AB

58' : 20449+2041
J 1179

59' : 20398+1927
J 2604

62' : 20393+2003
J 3103

65' : 20419+2043
BU 673AB

66' : 20472+1901
TDT2538

67' : 20396+2018
WFC 257

69' : 20425+1837
TDT2486

70' : 20448+2051
A 172

72' : 20467+1846
YR 28

74' : 20402+2039
SCA 173

74' : 20403+2040
TDT2461

74' : 20488+1943
JNN 286



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.

20436+1944 STF 2722 (HD 197518)

 
 
20h 43m 38.82s +19° 43' 40.7" P.A. 306.00 sep 7.5 mag 8.32,8.94 Sp G5 dist. 239.23 pc (780.37 l.y.)
 
 
Coord 2000 20436+1944 Discov num STF2722 Comp Coord arcsec 2000 20 43 38.82 +19 43 40.7
Date first 1830 Date last 2020 Obs 49
Pa first 308 Pa last 306.2 P.A. Now (θ) 306.2°
Sep first 7.1 Sep last 7.479 Sep. Now (ρ) 7.479"
Mag pri 8.32 Mag sec 8.94 delta mag (ΔM) 0.62 Spectral class G5 (yellow)
Pri motion ra +031 Sec motion ra +030
Pri motion dec -011 Sec motion dec -009
Notes
rPM=0.068 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197518 Constellation Delphinus SAO 106430 HIP 102295
Tycho2 1642-00222-1 Gaia DR2 1814257343328666624 HD 197518 GC 28883
BD BD+19 4495 Distance 239.23 Distance ly 780.37
 
 
WDS 20436+1944 STF 2722 (HD 197518) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
STFA (F. Struve DD - Appendix list #1) ...................
STFB (F. Struve DD - Appendix list #2) ...................
StF1833A Ma - Struve, F.G.W. 1833MmRAS...5...13H
StF1833A +Mc cited by Herschel (MemRAS 5, 13, 1833)
StF1833B Ma - Struve, F.G.W. 1833AN.....10..389B
StF1833B cited by Bessel (AN 10, 389, 1833)
StF1837 Ma - Struve, F.G.W. 1837AN.....14...249
StF1837 Stellarum duplicium et multiplicium mensurae micrometricae...
StF1837 (Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837
StF1844A Ma - Struve, F.G.W. 1844QB43.S66.......
StF1844A cited by Smyth (Cycle of Celestial Objects 2, 1844)
StF1852A Ma - Struve, F.G.W. .
StF1852A cited by Bishop (Bishop Obs. Astron. Observations 1852)
StF1865A Ma - Struve, F.G.W. 1865AN.....64...81E
StF1865A cited by Engelmann (AN 64, 81, #1518, 1865)
StF1875A Ma - Struve, F.G.W. 1875AN.....85..323D
StF1875A cited by Doberck, 1875 (see Dob1875b,f,g,h)
StF1878 Ma - Struve, F.G.W. .
StF1878 Pulkova Observations 9, 1878
StF1878B Ma - Struve, F.G.W. 1878Obs.....2..239G
StF1878B cited by Gledhill (Obs 2, 239, 1878)
StF1880A Ma - Struve, F.G.W. 1880Obs.....3..535G
StF1880A cited by Gledhill (Obs 3, 535, 1880)
StF1906A Ma - Struve, F.G.W. 1906QB821.B972.....
StF1906A cited in BDS (Burnham Double Star Cat.), 1906
StF1906B Ma - Struve, F.G.W. 1906MmRAS..56....1L
StF1906B cited by Lewis (MemRAS 56, 1, 1906)
StF1922A Ma - Struve, F.G.W. 1922AN....216...49R
StF1922A cited by Rabe (AN 216, 49, 1922)
StF1932A Ma - Struve, F.G.W. 1932QB821.A43......
StF1932A cited in ADS (Aitken Double Star Cat.), 1932
StF2002 - - Weis, J.
StF2002 F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue
StF2002 USNO Library : QB 821 .S8 W49 2002
StF2022 - - email note from Jan Weis: 6 July 2022
StF9999 Ma - Struve, F.G.W. ...................
StF9999 Unpublished, manuscript or reference not found.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20436+1944 STF2722 2003 38 307 7.4 8.32 8.94 G5 D 204338.82+194340.7
20436+1944 STF2722 2009 40 307 7.3 8.32 8.94 G5 D 204338.82+194340.7
20436+1944 STF2722 2013 41 306 7.5 8.32 8.94 G5 D 204338.82+194340.7
20436+1944 STF2722 2016 43 306 7.4 8.32 8.94 G5 204338.82+194340.7
20436+1944 STF2722 2020 49 306 7.5 8.32 8.94 G5 204338.82+194340.7

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

 
 
WDS 20436+1944 STF 2722 (HD 197518) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20436+1944 STF 2722 (HD 197518) : MEASURES
 
 
No records found.

 
 
WDS 20436+1944 (HD 197518) : VIRTUAL EYEPIECE
 
 

20436+1944 STF2722A mag 8.32 Sp G5 20436+1944 STF2722B sep 7.2 P.A. 307.90 mag 8.94 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 20436+1944 (HD 197518) : ALADIN DSS IMAGE @ 20h 43m 38.82s +19° 43' 40.7"
 
 
 
 
WDS 20436+1944 STF 2722 (HD 197518) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20436+1944 STF2722 distance=0' 20435+1953 STF2721 distance=10' 20444+1945 CAR 2 distance=11' 20448+1943 COU 424 distance=17' 20422+1952 LBU 19AB distance=23' 20422+1952 LBU 19AC distance=23' 20422+1952 LBU 19AD distance=23' 20419+1931 COU 226AB distance=29' 20419+1931 COU 226AC distance=29' 20423+1921 SHN 39 distance=30' 20410+2001 HJ 2987 distance=43' 20408+1956 RAO 23Ca,Cb distance=43' 20408+1956 RAO 23CD distance=43' 20408+1956 RAO 23CE distance=43' 20408+1956 BUP 215AB distance=43' 20408+1956 LDS1045AC distance=43' 20433+1855 TDS1094 distance=49' 20447+2032 BRT2484 distance=51' 20466+1915 COU 426 distance=52' 20412+2023 COU 423 distance=53' 20467+1913 GWP2997 distance=54' 20471+1918 HO 141AB distance=56' 20471+1918 HO 141AC distance=56' 20449+2041 J 1179 distance=58' 20398+1927 J 2604 distance=59' 20393+2003 J 3103 distance=62' 20419+2043 BU 673AB distance=65' 20419+2043 BU 673AC distance=65' 20472+1901 TDT2538 distance=66' 20396+2018 WFC 257 distance=67' 20425+1837 TDT2486 distance=69' 20448+2051 A 172 distance=70' 20467+1846 YR 28 distance=72' 20402+2039 SCA 173 distance=74' 20403+2040 TDT2461 distance=74' 20488+1943 JNN 286 distance=74' 20467+2044 HJ 2999AB distance=75' 20467+2044 TOB 197AC distance=75' 20395+1857 HU 362 distance=76' 20386+2007 COU 225 distance=76' 20485+1854 HO 459 distance=85' 20420+1821 J 193 distance=86' 20406+2059 TDT2465 distance=88' 20479+1840 UC 4292 distance=88' 20378+1936 J 3099 distance=88' 20423+2109 BRT2480 distance=88' 20385+1848 J 3102 distance=89' 20493+2026 HJ 926 distance=91' 20444+2119 A 171 distance=97' 20445+2123 BRT2483 distance=101' 20507+1959 ROE 16AB distance=102' 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 20436+1944 STF2722 306 7.5
Show 20435+1953 STF2721 22 2.6 10
Show 20444+1945 CAR 2 82 0.2 11
Show 20448+1943 COU 424 239 5.5 17
Show 20422+1952 LBU 19 AB 138 124.7 23
Show 20422+1952 LBU 19 AC 111 94.9 23
Show 20422+1952 LBU 19 AD 23 129.8 23
Show 20419+1931 COU 226 AB 53 0.4 29
Show 20419+1931 COU 226 AC 337 13.9 29
Show 20423+1921 SHN 39 54 0.5 30
Show 20410+2001 HJ 2987 116 10.8 43
Show 20408+1956 RAO 23 Ca,Cb 227 0.2 43
Show 20408+1956 RAO 23 CD 303 20.3 43
Show 20408+1956 RAO 23 CE 327 29.4 43
Show 20408+1956 BUP 215 AB 25 69.4 43
Show 20408+1956 LDS1045 AC 184 125.2 43
Show 20433+1855 TDS1094 261 1.0 49
Show 20447+2032 BRT2484 5 2.9 51
Show 20466+1915 COU 426 158 0.3 52
Show 20412+2023 COU 423 162 0.4 53
Show 20467+1913 GWP2997 116 272.0 54
Show 20471+1918 HO 141 AB 294 1.6 56
Show 20471+1918 HO 141 AC 64 22.6 56
Show 20449+2041 J 1179 143 4.0 58
Show 20398+1927 J 2604 141 2.2 59
Show 20393+2003 J 3103 224 5.5 62
Show 20419+2043 BU 673 AB 292 3.9 65
Show 20419+2043 BU 673 AC 163 102.6 65
Show 20472+1901 TDT2538 234 1.0 66
Show 20396+2018 WFC 257 317 6.7 67
Show 20425+1837 TDT2486 76 0.7 69
Show 20448+2051 A 172 219 2.9 70
Show 20467+1846 YR 28 71 0.0 72
Show 20402+2039 SCA 173 170 1.5 74
Show 20403+2040 TDT2461 356 0.5 74
Show 20488+1943 JNN 286 179 0.2 74
Show 20467+2044 HJ 2999 AB 221 10.3 75
Show 20467+2044 TOB 197 AC 271 19.5 75
Show 20395+1857 HU 362 313 0.6 76
Show 20386+2007 COU 225 286 0.3 76
Show 20485+1854 HO 459 24 0.5 85
Show 20420+1821 J 193 81 5.5 86
Show 20406+2059 TDT2465 30 1.1 88
Show 20479+1840 UC 4292 105 11.0 88
Show 20378+1936 J 3099 145 5.5 88
Show 20423+2109 BRT2480 232 4.7 88
Show 20385+1848 J 3102 96 6.4 89
Show 20493+2026 HJ 926 190 5.8 91
Show 20444+2119 A 171 325 5.4 97
Show 20445+2123 BRT2483 307 3.6 101
Show 20507+1959 ROE 16 AB 75 6.0 102

 
 
WDS 20436+1944 : COMPONENTS
 
 
  A
B pa=307.9°
sep=7.20"
 
 
20436+1944 A
 
 
Componente originario normalizzato AB Name HD 197518 Coord arcsec 2000 204338.82+194340.7 Mag 8.32
Spectral class G5 (yellow) PmRA 31.00 PmDE -11.0 SAO 106430
HIP 102295 Tycho2 1642-00222-1 HD 197518 GC 28883
BD BD+19 4495
Tycho2
Tycho2 1642-00222-1 Pflag RAmdeg 310.91175936 DEmdeg 19.72797634
PmRA 32.3 PmDE -11.6 E RAmdeg 7 E DEmdeg 9
E pmRA 1.2 E pmDE 1.1 EpRAm 1991.07 EpDEm 1990.53
Num 8 Q RAmdeg 1.4 Q DEmdeg 0.8 Q pmRA 1.4
Q pmDE 0.8 BTmag 8.955 E BTmag 0.019 VTmag 8.319
E VTmag 0.014 Prox 74 TYC T HIP 102295
CCDM A RAdeg 310.91167778 DEdeg 19.72800444 EpRA 1990 1.46
EpDE 1990 1.27 E RAdeg 7.2 E DEdeg 8.9 Posflg
Corr -0.4
SAO
SAO 106430 DelFlag RA1950 PmRA1950 0.0031
DE1950 PmDE1950 -0.011 Vmag 7.9 SpType G5
Double code Source 70 CatNum 28883 DM BD+19 4495
DMcomp BDsup HD 197518 M HD 0
GC 28883 RA1950rad 5.41656087 DE1950rad 0.34115636 PmRA2000 0.0032
PmDE2000 -0.013
Hipparcos
Catalog H HIP 102295 Proxy H RAhms 20 43 38.80
DEdms +19 43 40.8 Vmag 7.85 VarFlag R Vmag H
RAdeg 310.912 DEdeg 19.728 AstroRef A Plx 5.17
CCDM 20436+1944 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 306 Rho 7.434 HD 197518 BD BD+19 4495
CD CP Dm number +19 4495 VIred 0.55
SpType G5+... R SpType Coord arcsec 2000 204338.80+194340.8
Hipparcos 2
HIP 102295 Sn 15 So 3 Nc 2
RArad 5.4264325111 DErad 0.3443186688 Plx 4.18 PmRA 27.43
PmDE -11.94 E RArad 0.76 E DErad 0.68 E Plx 1.11
E pmRA 0.82 E pmDE 0.81 Hpmag 7.986 E Hpmag 0.0018
SHp 0.017 VA 0 BV 0.657 E BV 0.015
VI 0.72
CCDM
Ccdm 20436+1944 RComp Comp A Note1
Note2 Discov num DRAs 2.77 DDEs -19.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 8.4 Sp G5 PmNote *
PmRA 29 PmDE -14 Dm number +19 4495 Cat1 BD
Name2 +19 2084 Cat2 AGK2/3 HD 197518 M HD
ADS BDS A14209 M ADS BDS N IDS IDS 20391N1922A
HIC 102295
 
 
20436+1944 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204338.42+194345.1 Mag 8.94 PmRA 30.00
PmDE -9.0 Tycho2 1642-03003-1 Calc delta mag 0.62 Calc coord yes
Tycho2
Tycho2 1642-03003-1 Pflag RAmdeg 310.91000360 DEmdeg 19.72921667
PmRA 30.9 PmDE -9.7 E RAmdeg 11 E DEmdeg 14
E pmRA 1.2 E pmDE 1.2 EpRAm 1990.52 EpDEm 1989.74
Num 6 Q RAmdeg 0.7 Q DEmdeg 1.5 Q pmRA 0.7
Q pmDE 1.5 BTmag 9.825 E BTmag 0.027 VTmag 8.938
E VTmag 0.018 Prox 74 TYC T HIP 102295
CCDM B RAdeg 310.90992556 DEdeg 19.72924028 EpRA 1990 1.44
EpDE 1990 1.32 E RAdeg 11.4 E DEdeg 13.6 Posflg D
Corr -0.3
CCDM
Ccdm 20436+1944 RComp Comp B Note1
Note2 Discov num STF2722 DRAs 2.34 DDEs -14.6
R dRAs 91 Year 1830 Theta 307 Rho 7.2
Obs 8 Vmag 8.9 Sp PmNote *
PmRA 27 PmDE -12 Dm number Cat1
Name2 +19 2083 Cat2 AGK2/3 HD M HD
ADS BDS A14209 M ADS BDS N IDS IDS 20391N1922B
HIC 102295