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Doubles in session


Current system
20435+1657
STF 2720
HD 197474


Nearby doubles
12' : 20431+1705
BLL 51

16' : 20434+1712
J 845

22' : 20437+1635
BPM2237

23' : 20446+1642
BPM2246AB

28' : 20446+1635
BPM2248AB

32' : 20433+1728
J 3109

32' : 20417+1716
BPM2230

32' : 20432+1728
LOS 9

33' : 20453+1715
GWP2993

36' : 20456+1714
COU 425

36' : 20442+1731
BPM2241

38' : 20430+1734
BPM2236

39' : 20448+1730
BPM2252

43' : 20411+1631
FMR 161

45' : 20463+1715
GWP2995

52' : 20416+1738
J 3107

53' : 20463+1624
BPM2257

53' : 20408+1733
BPM2226

53' : 20434+1604
HJ 1564

54' : 20446+1605
BPM2245

55' : 20415+1611
J 2319

56' : 20409+1738
J 191

57' : 20444+1752
UC 4276

62' : 20466+1616
BPM2261

64' : 20437+1800
LDS4857

68' : 20467+1607
STF2727AB



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.

20435+1657 STF 2720 (HD 197474)

 
 
20h 43m 27.91s +16° 56' 41.9" P.A. 177.00 sep 4.0 mag 9.22,9.56 Sp F8 dist. 100.5 pc (327.83 l.y.)
 
 
Coord 2000 20435+1657 Discov num STF2720 Comp Coord arcsec 2000 20 43 27.91 +16 56 41.9
Date first 1830 Date last 2016 Obs 58
Pa first 185 Pa last 177.1 P.A. Now (θ) 177.1°
Sep first 3.8 Sep last 3.952 Sep. Now (ρ) 3.952"
Mag pri 9.22 Mag sec 9.56 delta mag (ΔM) 0.34 Spectral class F8 (yellow-white)
Pri motion ra -010 Sec motion ra -017
Pri motion dec +058 Sec motion dec +025
Notes
rPM=0.573
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197474 Constellation Delphinus SAO 106426 HIP 102283
Tycho2 1638-00437-1 Gaia DR2 1811243612019592064 HD 197474 GC 28874
BD BD+16 4355 Distance 100.5 Distance ly 327.83
 
 
WDS 20435+1657 STF 2720 (HD 197474) : 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
20435+1657 STF2720 1998 50 179 3.9 9.22 9.56 F8 D 204327.91+165641.9
20435+1657 STF2720 2008 51 178 3.9 9.22 9.56 F8 D 204327.91+165641.9
20435+1657 STF2720 2009 52 178 3.9 9.22 9.56 F8 D 204327.91+165641.9
20435+1657 STF2720 2011 55 178 3.8 9.22 9.56 F8 D 204327.91+165641.9
20435+1657 STF2720 2016 54 178 4.0 9.22 9.56 F8 204327.91+165641.9

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

 
 
WDS 20435+1657 STF 2720 (HD 197474) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20435+1657 STF 2720 (HD 197474) : MEASURES
 
 
No records found.

 
 
WDS 20435+1657 (HD 197474) : VIRTUAL EYEPIECE
 
 

20435+1657 STF2720A mag 9.22 Sp F8 20435+1657 STF2720B sep 4.0 P.A. 177.20 mag 9.56 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 20435+1657 (HD 197474) : ALADIN DSS IMAGE @ 20h 43m 27.91s +16° 56' 41.9"
 
 
 
 
WDS 20435+1657 STF 2720 (HD 197474) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20435+1657 STF2720 distance=0' 20431+1705 BLL 51 distance=12' 20434+1712 J 845 distance=16' 20437+1635 BPM2237 distance=22' 20446+1642 BPM2246AB distance=23' 20446+1642 BPM2247AC distance=23' 20446+1635 BPM2248AB distance=28' 20446+1635 BPM2249AC distance=28' 20446+1635 BPM2250BC distance=29' 20433+1728 J 3109 distance=32' 20417+1716 BPM2230 distance=32' 20432+1728 LOS 9 distance=32' 20453+1715 GWP2993 distance=33' 20456+1714 COU 425 distance=36' 20442+1731 BPM2241 distance=36' 20430+1734 BPM2236 distance=38' 20448+1730 BPM2252 distance=39' 20411+1631 FMR 161 distance=43' 20463+1715 GWP2995 distance=45' 20416+1738 J 3107 distance=52' 20463+1624 BPM2257 distance=53' 20408+1733 BPM2226 distance=53' 20434+1604 HJ 1564 distance=53' 20446+1605 BPM2245 distance=54' 20415+1611 J 2319 distance=55' 20409+1738 J 191 distance=56' 20444+1752 UC 4276 distance=57' 20466+1616 BPM2261 distance=62' 20437+1800 LDS4857 distance=64' 20467+1607 STF2727AB distance=68' 20467+1607 FYM 18AD distance=68' 20406+1559 BPM2225 distance=71' 20400+1749 BPM2222 distance=72' 20468+1602 BPM2264 distance=73' 20479+1732 BRT1348 distance=73' 20413+1551 UC 4257 distance=73' 20462+1554 WSI 110Aa,Ab distance=74' 20462+1554 STF2725AB distance=74' 20435+1540 GWP2990 distance=77' 20485+1628 BPM2271 distance=78' 20436+1537 J 3108 distance=78' 20481+1616 SKF1770 distance=79' 20383+1623 BPM2216 distance=82' 20396+1555 WCK 2Aa,Ab (Sualocin) distance=83' 20396+1555 BU 298AB (Sualocin) distance=83' 20396+1555 HJ 1554AC (Sualocin) distance=83' 20396+1555 BU 298AD (Sualocin) distance=83' 20396+1555 BU 298AE (Sualocin) distance=83' 20396+1555 BU 298AF (Sualocin) distance=83' 20396+1555 CIA 23Ab1,2 distance=83' 20457+1537 BPM2255 distance=87' 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 20435+1657 STF2720 177 4.0
Show 20431+1705 BLL 51 159 56.3 12
Show 20434+1712 J 845 224 4.0 16
Show 20437+1635 BPM2237 49 108.4 22
Show 20446+1642 BPM2246 AB 16 90.0 23
Show 20446+1642 BPM2247 AC 173 116.0 23
Show 20446+1635 BPM2248 AB 95 107.8 28
Show 20446+1635 BPM2249 AC 29 107.0 28
Show 20446+1635 BPM2250 BC 332 117.2 29
Show 20433+1728 J 3109 245 7.8 32
Show 20417+1716 BPM2230 15 58.6 32
Show 20432+1728 LOS 9 116 2.8 32
Show 20453+1715 GWP2993 104 11.1 33
Show 20456+1714 COU 425 327 0.7 36
Show 20442+1731 BPM2241 344 107.2 36
Show 20430+1734 BPM2236 331 95.7 38
Show 20448+1730 BPM2252 246 39.8 39
Show 20411+1631 FMR 161 322 27.8 43
Show 20463+1715 GWP2995 257 8.3 45
Show 20416+1738 J 3107 119 6.0 52
Show 20463+1624 BPM2257 337 107.8 53
Show 20408+1733 BPM2226 226 107.2 53
Show 20434+1604 HJ 1564 41 11.4 53
Show 20446+1605 BPM2245 198 112.1 54
Show 20415+1611 J 2319 192 7.5 55
Show 20409+1738 J 191 166 1.3 56
Show 20444+1752 UC 4276 284 50.8 57
Show 20466+1616 BPM2261 202 69.5 62
Show 20437+1800 LDS4857 128 52.4 64
Show 20467+1607 STF2727 AB 266 8.8 68
Show 20467+1607 FYM 18 AD 323 109.4 68
Show 20406+1559 BPM2225 57 22.7 71
Show 20400+1749 BPM2222 294 86.5 72
Show 20468+1602 BPM2264 222 107.2 73
Show 20479+1732 BRT1348 123 5.7 73
Show 20413+1551 UC 4257 208 20.3 73
Show 20462+1554 WSI 110 Aa,Ab 343 0.0 74
Show 20462+1554 STF2725 AB 12 6.2 74
Show 20435+1540 GWP2990 291 26.5 77
Show 20485+1628 BPM2271 127 97.8 78
Show 20436+1537 J 3108 196 6.3 78
Show 20481+1616 SKF1770 223 3.4 79
Show 20383+1623 BPM2216 177 102.9 82
Show Sualocin 20396+1555 WCK 2 Aa,Ab 289 0.1 83
Show Sualocin 20396+1555 BU 298 AB 233 35.5 83
Show Sualocin 20396+1555 HJ 1554 AC 277 48.4 83
Show Sualocin 20396+1555 BU 298 AD 160 45.4 83
Show Sualocin 20396+1555 BU 298 AE 304 57.2 83
Show Sualocin 20396+1555 BU 298 AF 118 72.2 83
Show 20396+1555 CIA 23 Ab1,2 250 0.0 83
Show 20457+1537 BPM2255 85 72.3 87

 
 
WDS 20435+1657 : COMPONENTS
 
 
  A
B pa=177.2°
sep=3.95"
 
 
20435+1657 A
 
 
Componente originario normalizzato AB Name HD 197474 Coord arcsec 2000 204327.91+165641.9 Mag 9.22
Spectral class F8 (yellow-white) PmRA -10.00 PmDE 58.0 SAO 106426
HIP 102283 Tycho2 1638-00437-1 HD 197474 GC 28874
BD BD+16 4355
Tycho2
Tycho2 1638-00437-1 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 9.694 E BTmag 0.025 VTmag 9.219
E VTmag 0.022 Prox 40 TYC T HIP 102283
CCDM A RAdeg 310.86627528 DEdeg 16.94497861 EpRA 1990 1.68
EpDE 1990 1.40 E RAdeg 11.9 E DEdeg 15.3 Posflg
Corr 0.1
SAO
SAO 106426 DelFlag RA1950 PmRA1950 -0.0001
DE1950 PmDE1950 0.025 Vmag 8.6 SpType F8
Double code Source 70 CatNum 28874 DM BD+16 4355
DMcomp BDsup HD 197474 M HD 0
GC 28874 RA1950rad 5.41557881 DE1950rad 0.2925694 PmRA2000 0
PmDE2000 0.023
Hipparcos
Catalog H HIP 102283 Proxy H RAhms 20 43 27.91
DEdms +16 56 41.9 Vmag 8.53 VarFlag R Vmag H
RAdeg 310.866 DEdeg 16.945 AstroRef A Plx 12.69
CCDM 20435+1657 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 179 Rho 3.927 HD 197474 BD BD+16 4355
CD CP Dm number +16 4355 VIred 0.02
SpType F8 R SpType Coord arcsec 2000 204327.91+165641.9
Hipparcos 2
HIP 102283 Sn 15 So 3 Nc 2
RArad 5.4256400676 DErad 0.2957455544 Plx 9.95 PmRA -12.81
PmDE 26.66 E RArad 1.02 E DErad 0.89 E Plx 1.38
E pmRA 1.38 E pmDE 0.98 Hpmag 8.625 E Hpmag 0.0027
SHp 0.022 VA 0 BV 0.436 E BV 0.03
VI 0.5
CCDM
Ccdm 20435+1657 RComp Comp A Note1
Note2 Discov num DRAs -2.07 DDEs -19.0
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.3 Sp F8 PmNote *
PmRA -7 PmDE 43 Dm number +16 4355 Cat1 BD
Name2 +16 2249 Cat2 AGK2/3 HD 197474 M HD
ADS BDS A14206 M ADS BDS N IDS IDS 20388N1635A
HIC 102283
 
 
20435+1657 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204327.92+165638.0 Mag 9.56 PmRA -17.00
PmDE 25.0 Tycho2 1638-02699-1 Calc delta mag 0.34 Calc coord yes
Tycho2
Tycho2 1638-02699-1 Pflag RAmdeg 310.86629526 DEmdeg 16.94389612
PmRA -5.6 PmDE 7.4 E RAmdeg 14 E DEmdeg 25
E pmRA 1.9 E pmDE 1.9 EpRAm 1991.19 EpDEm 1989.29
Num 3 Q RAmdeg 0.9 Q DEmdeg 2.3 Q pmRA 0.9
Q pmDE 2.3 BTmag 10.049 E BTmag 0.035 VTmag 9.555
E VTmag 0.031 Prox 40 TYC T HIP 102283
CCDM B RAdeg 310.86630861 DEdeg 16.94387806 EpRA 1990 1.79
EpDE 1990 1.26 E RAdeg 14.4 E DEdeg 24.5 Posflg
Corr 0.2
CCDM
Ccdm 20435+1657 RComp Comp B Note1
Note2 Discov num STF2720 DRAs DDEs
R dRAs Year 1830 Theta 182 Rho 3.8
Obs 16 Vmag 9.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14206 M ADS BDS N IDS IDS 20388N1635B
HIC 102283