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WDS 20104+4949 STF 2648 (HD 191974)
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Doubles in session


Current system
20104+4949
STF 2648
HD 191974


Nearby doubles
8' : 20111+4946
ES 2691

15' : 20117+4943
ES 500

25' : 20109+4925
KPP1341

26' : 20128+4938
KPP1802

27' : 20105+4923
ES 1099

45' : 20096+5034
TDT2035

47' : 20131+4911
ES 502

52' : 20153+5009
DAM 672

52' : 20150+4923
TDT2120

56' : 20052+4923
HJ 1481AB

57' : 20047+4938
KU 58AB

58' : 20157+5014
CHR 93

63' : 20055+5030
ES 798AB

69' : 20169+5017
ENG 73AB

79' : 20032+5028
HO 454

84' : 20096+5112
NSN 729

85' : 20190+4938
ES 2693AB

89' : 20014+5006
H 5 47AB

89' : 20095+4821
TDT2033

92' : 20062+5112
TDT1980

95' : 20200+5008
KPP4192

96' : 20159+5109
HU 585

101' : 20125+5128
AC 17AB

102' : 20118+5130
TDT2074

102' : 20046+5115
TDS1040

103' : 20073+4811
HDS2867



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.

20104+4949 STF 2648 (HD 191974)

 
 
20h 10m 23.11s +49° 49' 16.1" P.A. 118.00 sep 6.7 mag 8.11,9.59 Sp F5 dist. 91.91 pc (299.81 l.y.)
 
 
Coord 2000 20104+4949 Discov num STF2648 Comp Coord arcsec 2000 20 10 23.11 +49 49 16.1
Date first 1828 Date last 2020 Obs 37
Pa first 117 Pa last 117.5 P.A. Now (θ) 117.5°
Sep first 5.0 Sep last 6.684 Sep. Now (ρ) 6.684"
Mag pri 8.11 Mag sec 9.59 delta mag (ΔM) 1.48 Spectral class F5 (yellow-white)
Pri motion ra +010 Sec motion ra +010
Pri motion dec +043 Sec motion dec +042
Notes
rPM=0.023 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 191974 Constellation Cygnus SAO 49271 HIP 99388
Tycho2 3567-01155-1 Gaia DR2 2087620020176419072 HD 191974 GC 28015
BD BD+49 3212 Distance 91.91 Distance ly 299.81
 
 
WDS 20104+4949 STF 2648 (HD 191974) : 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
20104+4949 STF2648 2008 24 117 6.8 8.11 9.59 F5 D 201023.11+494916.1
20104+4949 STF2648 2018 29 118 6.7 8.11 9.59 F5 201023.11+494916.1
20104+4949 STF2648 2020 36 118 6.7 8.11 9.59 F5 201023.11+494916.1

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

 
 
WDS 20104+4949 STF 2648 (HD 191974) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20104+4949 STF 2648 (HD 191974) : MEASURES
 
 
No records found.

 
 
WDS 20104+4949 (HD 191974) : VIRTUAL EYEPIECE
 
 

20104+4949 STF2648A mag 8.11 Sp F5 20104+4949 STF2648B sep 4.9 P.A. 128.90 mag 9.59 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 20104+4949 (HD 191974) : ALADIN DSS IMAGE @ 20h 10m 23.11s +49° 49' 16.1"
 
 
 
 
WDS 20104+4949 STF 2648 (HD 191974) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20104+4949 STF2648 distance=0' 20111+4946 ES 2691 distance=8' 20117+4943 ES 500 distance=15' 20109+4925 KPP1341 distance=25' 20128+4938 KPP1802 distance=26' 20105+4923 ES 1099 distance=27' 20096+5034 TDT2035 distance=45' 20131+4911 ES 502 distance=47' 20153+5009 DAM 672 distance=52' 20150+4923 TDT2120 distance=52' 20052+4923 ARN9002BC distance=56' 20052+4923 HJ 1481AB distance=56' 20052+4923 HJ 1481AC distance=56' 20052+4923 ABH 128AD distance=56' 20052+4923 ABH 128AE distance=56' 20052+4923 ABH 128AF distance=56' 20052+4923 ABH 128AG distance=56' 20052+4923 ABH 128AH distance=56' 20052+4923 ABH 128AI distance=56' 20047+4938 KU 58AB distance=57' 20047+4938 ES 2688BC distance=57' 20157+5014 CHR 93 distance=58' 20055+5030 ES 798BC distance=62' 20055+5030 ES 798AB distance=63' 20169+5017 RAO 70FL distance=68' 20169+5017 ENG 73AB distance=69' 20169+5017 ENG 73AC distance=69' 20169+5017 ENG 73AD distance=69' 20169+5017 ENG 73AE distance=69' 20169+5017 MET 89AH distance=69' 20169+5017 MET 89AI distance=69' 20169+5017 MET 89AJ distance=69' 20169+5017 MET 89AK distance=69' 20169+5017 GIC 155AF distance=69' 20169+5017 BUP 243DF distance=69' 20169+5017 BUP 243BG distance=70' 20032+5028 HO 454 distance=79' 20096+5112 NSN 729 distance=84' 20190+4938 ES 2693AB distance=85' 20190+4938 ES 2693BC distance=85' 20014+5006 H 5 47BC distance=89' 20014+5006 H 5 47BD distance=89' 20014+5006 H 5 47AB distance=89' 20014+5006 H 5 47AE distance=89' 20095+4821 TDT2033 distance=89' 20062+5112 TDT1980 distance=92' 20200+5008 KPP4192 distance=95' 20159+5109 HU 585 distance=96' 20125+5128 AC 17AB distance=101' 20125+5128 AC 17AC distance=101' 20125+5128 AC 17AD distance=101' 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 20104+4949 STF2648 118 6.7
Show 20111+4946 ES 2691 314 9.5 8
Show 20117+4943 ES 500 345 5.4 15
Show 20109+4925 KPP1341 257 10.1 25
Show 20128+4938 KPP1802 125 14.0 26
Show 20105+4923 ES 1099 186 4.9 27
Show 20096+5034 TDT2035 92 0.8 45
Show 20131+4911 ES 502 220 14.0 47
Show 20153+5009 DAM 672 252 6.9 52
Show 20150+4923 TDT2120 323 3.6 52
Show 20052+4923 ARN9002 BC 240 33.8 56
Show 20052+4923 HJ 1481 AB 6 18.1 56
Show 20052+4923 HJ 1481 AC 272 27.4 56
Show 20052+4923 ABH 128 AD 104 118.5 56
Show 20052+4923 ABH 128 AE 104 104.9 56
Show 20052+4923 ABH 128 AF 38 78.2 56
Show 20052+4923 ABH 128 AG 318 81.1 56
Show 20052+4923 ABH 128 AH 256 100.8 56
Show 20052+4923 ABH 128 AI 250 103.4 56
Show 20047+4938 KU 58 AB 186 2.7 57
Show 20047+4938 ES 2688 BC 169 15.4 57
Show 20157+5014 CHR 93 173 0.1 58
Show 20055+5030 ES 798 BC 325 3.3 62
Show 20055+5030 ES 798 AB 107 80.9 63
Show 20169+5017 RAO 70 FL 266 15.1 68
Show 20169+5017 ENG 73 AB 74 81.4 69
Show 20169+5017 ENG 73 AC 158 92.7 69
Show 20169+5017 ENG 73 AD 340 122.5 69
Show 20169+5017 ENG 73 AE 118 162.5 69
Show 20169+5017 MET 89 AH 67 4.2 69
Show 20169+5017 MET 89 AI 44 8.7 69
Show 20169+5017 MET 89 AJ 326 11.3 69
Show 20169+5017 MET 89 AK 232 11.7 69
Show 20169+5017 GIC 155 AF 287 105.9 69
Show 20169+5017 BUP 243 DF 216 105.9 69
Show 20169+5017 BUP 243 BG 193 10.5 70
Show 20032+5028 HO 454 53 5.9 79
Show 20096+5112 NSN 729 16 42.2 84
Show 20190+4938 ES 2693 AB 110 30.6 85
Show 20190+4938 ES 2693 BC 189 18.5 85
Show 20014+5006 H 5 47 BC 76 8.8 89
Show 20014+5006 H 5 47 BD 258 9.4 89
Show 20014+5006 H 5 47 AB 150 41.8 89
Show 20014+5006 H 5 47 AE 343 168.3 89
Show 20095+4821 TDT2033 7 2.2 89
Show 20062+5112 TDT1980 42 0.8 92
Show 20200+5008 KPP4192 232 1.5 95
Show 20159+5109 HU 585 48 4.2 96
Show 20125+5128 AC 17 AB 82 4.4 101
Show 20125+5128 AC 17 AC 9 84.8 101
Show 20125+5128 AC 17 AD 80 75.1 101

 
 
WDS 20104+4949 : COMPONENTS
 
 
  A
B pa=128.9°
sep=4.91"
 
 
20104+4949 A
 
 
Componente originario normalizzato AB Name HD 191974 Coord arcsec 2000 201023.11+494916.1 Mag 8.11
Spectral class F5 (yellow-white) PmRA 10.00 PmDE 43.0 SAO 49271
HIP 99388 Tycho2 3567-01155-1 HD 191974 GC 28015
BD BD+49 3212
Tycho2
Tycho2 3567-01155-1 Pflag RAmdeg 302.59629481 DEmdeg 49.82112847
PmRA 12.3 PmDE 42.0 E RAmdeg 6 E DEmdeg 6
E pmRA 1.5 E pmDE 1.5 EpRAm 1991.53 EpDEm 1991.50
Num 5 Q RAmdeg 0.8 Q DEmdeg 1.2 Q pmRA 0.9
Q pmDE 1.1 BTmag 8.563 E BTmag 0.017 VTmag 8.112
E VTmag 0.012 Prox 66 TYC T HIP 99388
CCDM A RAdeg 302.59625083 DEdeg 49.82103167 EpRA 1990 1.72
EpDE 1990 1.69 E RAdeg 5.5 E DEdeg 5.8 Posflg
Corr 0.0
SAO
SAO 49271 DelFlag RA1950 PmRA1950 0.0015
DE1950 PmDE1950 0.059 Vmag 8.1 SpType F5
Double code Source 70 CatNum 28015 DM BD+49 3212
DMcomp BDsup HD 191974 M HD 0
GC 28015 RA1950rad 5.27495906 DE1950rad 0.86693224 PmRA2000 0.0019
PmDE2000 0.057
Hipparcos
Catalog H HIP 99388 Proxy H RAhms 20 10 23.10
DEdms +49 49 15.7 Vmag 7.84 VarFlag R Vmag H
RAdeg 302.596 DEdeg 49.821 AstroRef A Plx 10.79
CCDM 20104+4949 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 117 Rho 6.64 HD 191974 BD BD+49 3212
CD CP Dm number +49 3212 VIred 0.43
SpType F5... R SpType Coord arcsec 2000 201023.10+494915.7
Hipparcos 2
HIP 99388 Sn 15 So 3 Nc 2
RArad 5.2813008571 DErad 0.8695409238 Plx 10.88 PmRA 11.29
PmDE 42.9 E RArad 0.6 E DErad 0.63 E Plx 0.73
E pmRA 0.66 E pmDE 0.7 Hpmag 7.9473 E Hpmag 0.0009
SHp 0.012 VA 0 BV 0.483 E BV 0.014
VI 0.55
CCDM
Ccdm 20104+4949 RComp Comp A Note1
Note2 Discov num DRAs -0.87 DDEs 17.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 8.1 Sp F5 PmNote *
PmRA 14 PmDE 58 Dm number +49 3212 Cat1 BD
Name2 49271 Cat2 SAO HD 191974 M HD
ADS BDS A13471 M ADS BDS N IDS IDS 20075N4931A
HIC 99388
 
 
20104+4949 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 201023.51+494913.0 Mag 9.59 PmRA 10.00
PmDE 42.0 Calc delta mag 1.48 Calc coord yes
CCDM
Ccdm 20104+4949 RComp Comp B Note1
Note2 Discov num STF2648 DRAs DDEs
R dRAs Year 1831 Theta 117 Rho 6.4
Obs 9 Vmag 9.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13471 M ADS BDS N IDS IDS 20075N4931B
HIC 99388