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Doubles in session


Current system
19498-1125
STF 2581 AB
HD 187306


Nearby doubles
15' : 19504-1114
UC 4035

23' : 19491-1104
RST4641AB

39' : 19506-1047
HU 77AB

42' : 19508-1046
HO 275

46' : 19467-1129
HDS2811

53' : 19504-1033
RST4644

55' : 19525-1202
LDS4821

62' : 19455-1133
BRT2766

72' : 19450-1133
GWP2886

72' : 19520-1021
BU 148AB

72' : 19460-1039
HU 76

76' : 19447-1112
BU 827

78' : 19510-1240
GWP2901

83' : 19444-1102
CLS 1

85' : 19502-1000
RST4643AB

94' : 19539-1237
J 2288

94' : 19548-1223
HJ 602

98' : 19435-1055
TDT1677

98' : 19510-1301
LEO 46

99' : 19506-0947
KPP 444

103' : 19555-1026
GWP2908

104' : 19539-1248
UC 4048

108' : 19463-0950
BRT 553

109' : 19430-1040
GWP2883

112' : 19573-1109
UC 4058

115' : 19447-0958
BRT1952



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.

19498-1125 STF 2581 AB (HD 187306)

 
 
19h 49m 46.74s -11° 24' 31.8" P.A. 287.00 sep 44.9 mag 7.32,10.67 Sp F4V dist. 689.66 pc (2249.67 l.y.)
 
 
Coord 2000 19498-1125 Discov num STF2581 Comp AB Coord arcsec 2000 19 49 46.74 -11 24 31.8
Date first 1879 Date last 2015 Obs 19
Pa first 281 Pa last 286.6 P.A. Now (θ) 286.6°
Sep first 37.5 Sep last 44.907 Sep. Now (ρ) 44.907"
Mag pri 7.32 Mag sec 10.67 delta mag (ΔM) 3.35 Spectral class F4V (yellow-white)
Pri motion ra +038 Sec motion ra -009
Pri motion dec -062 Sec motion dec -016
Notes L Y (Linear solution, Parallax indicates components are non-physical)
rPM=0.904
This double is not physical.
 
 
19498-1125 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 187306 163020 19 49 47 -11 24 32 STF 2581 AB 2015 19 287 44.9 7.32 10.67 3.35 <===
Show 163020 19 49 47 -11 24 32 UC 4034 AC 2015 3 107 62.2 7.32 16.40 9.08
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 187306 Constellation Aquila SAO 163020 HIP 97558
Tycho2 5733-01936-1 Gaia DR2 4190130344063214208 HD 187306 GC 27437
BD BD-11 5143 Distance 689.66 Distance ly 2249.67
 
 
WDS 19498-1125 STF 2581 AB (HD 187306) : 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.
UC USNO CCD Astrographic Catalog (UCAC1, UCAC2, UCAC3, UCAC4) ...................
UC_2013a Eu j Zacharias, N., Finch, C.T., Girard, T.M., Henden, A., Bartlett, J.L., Monet, D.G., 2013AJ....145...44Z
UC_2013a & Zacharias, M.I. (UCAC4 Catalog)
UC_2013a AJ 145, 44, 2013
UC_2013b Eu j Hartkopf, W.I., Mason, B.D., Finch, C.T., Zacharias, N., Wycoff, G.L., & Hsu, D. 2013AJ....146...76H
UC_2013b AJ 146, 76, 2013 (UC 301 - 5058)
UC_2013b (Relative astrometry is derived from individual measurements, not precessed means.
UC_2013b UCAC aperture magnitudes are listed, unless the duplicity flag indicates a blended
UC_2013b image (a flag value of 30 or higher). Model fit magnitudes are given for both
UC_2013b components if either has such a flag. Model fit magnitudes are indicated by the
UC_2013b letter "f" following the filter information.
UC_2013b APASS photometry extracted from UCAC4 catalog is listed under reference AAV2012.
UC_2013b Due to aperture method used, APASS photometry is only included for pairs wider
UC_2013b than 10" (Henden, private comm.) Photometry for pairs wider than 10" which showed
UC_2013b identical values for both components in all filters were removed, as well.
UC_2015 Eu - Zacharias, N., Finch, C.T., Subasavage, J.P., Bredthauer, G., Crockett, C., 2015AJ....150..101Z
UC_2015 DiVittorio, M., Ferguson, E., Harris, F., Harris, H.C., Hendon, A., Kilian, C.,
UC_2015 Munn, J., Rafferty, T., Rhodes, A., Schultheis, M., Tilleman, T., & Wieder, G.
UC_2015 AJ 150, 101, 2015
UC_9999 Eu - temporary UCAC files ...................
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19498-1125 STF2581 AB 2009 14 287 44.4 7.32 10.67 F5 NLD 194946.74-112431.8
19498-1125 STF2581 AB 2015 15 287 44.9 7.32 10.67 F4V L Y 194946.74-112431.8

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

 
 
WDS 19498-1125 STF 2581 AB (HD 187306) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 19498-1125 STF 2581 AB (HD 187306) : MEASURES
 
 
No records found.

 
 
WDS 19498-1125 (HD 187306) : VIRTUAL EYEPIECE
 
 

19498-1125 STF2581A mag 7.32 Sp F4V 19498-1125 STF2581B sep 44.1 P.A. 286.90 mag 10.67 19498-1125 UC 4034C sep 61.1 P.A. 107.00 mag 16.4 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 19498-1125 (HD 187306) : ALADIN DSS IMAGE @ 19h 49m 46.74s -11° 24' 31.8"
 
 
 
 
WDS 19498-1125 STF 2581 AB (HD 187306) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

19498-1125 STF2581AB distance=1' 19498-1125 UC 4034AC distance=1' 19504-1114 UC 4035 distance=15' 19491-1104 RST4641AB distance=23' 19491-1104 HLN 47AC distance=23' 19506-1047 HU 77AB distance=39' 19506-1047 HU 77AB,C distance=39' 19508-1046 HO 275 distance=42' 19467-1129 HDS2811 distance=46' 19504-1033 RST4644 distance=53' 19525-1202 LDS4821 distance=55' 19455-1133 BRT2766 distance=62' 19450-1133 GWP2886 distance=72' 19520-1021 BU 148AB distance=72' 19520-1021 BU 148AC distance=72' 19460-1039 HU 76 distance=72' 19447-1112 BU 827 distance=76' 19510-1240 GWP2901 distance=78' 19444-1102 CLS 1 distance=83' 19502-1000 RST4643AB distance=85' 19502-1000 GII 286Aa,Ab distance=85' 19539-1237 J 2288 distance=94' 19548-1223 HJ 602 distance=94' 19435-1055 TDT1677 distance=98' 19510-1301 LEO 46 distance=98' 19506-0947 KPP 444 distance=99' 19555-1026 GWP2908 distance=103' 19539-1248 UC 4048 distance=104' 19463-0950 BRT 553 distance=108' 19430-1040 GWP2883 distance=109' 19573-1109 UC 4058 distance=112' 19447-0958 BRT1952 distance=115' 19419-1117 RST4638AB distance=117' 19565-1016 GWP2911 distance=121' 19565-1240 LDS 858 distance=126' 19460-1318 GWP2892 distance=127' 19453-1314 STF2565 distance=128' 19573-1234 LDS4824 distance=131' 19557-1305 HLD 153 distance=133' 19422-1015 RST4639 distance=133' 19438-0945 RST4640 distance=133' 19496-1340 BRT2767 distance=136' 19480-1342 DRS 66 distance=140' 19432-0937 AOT 76 distance=145' 19457-1337 GWP2889 distance=146' 19580-1245 RST4051 distance=146' 19401-1153 TDS1004 distance=146' 19400-1201 BRT2763 distance=147' 19397-1115 WFC 255 distance=149' 19563-1321 STF2602 distance=151' 19450-1339 BRT2765 distance=152' 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 19498-1125 STF2581 AB 287 44.9 1
Show 19498-1125 UC 4034 AC 107 62.2 1
Show 19504-1114 UC 4035 322 14.2 15
Show 19491-1104 RST4641 AB 148 1.0 23
Show 19491-1104 HLN 47 AC 16 10.8 23
Show 19506-1047 HU 77 AB 320 0.4 39
Show 19506-1047 HU 77 AB,C 316 27.8 39
Show 19508-1046 HO 275 121 26.4 42
Show 19467-1129 HDS2811 200 16.2 46
Show 19504-1033 RST4644 224 0.5 53
Show 19525-1202 LDS4821 350 10.1 55
Show 19455-1133 BRT2766 305 4.8 62
Show 19450-1133 GWP2886 71 488.4 72
Show 19520-1021 BU 148 AB 219 0.6 72
Show 19520-1021 BU 148 AC 55 31.1 72
Show 19460-1039 HU 76 264 0.9 72
Show 19447-1112 BU 827 276 1.3 76
Show 19510-1240 GWP2901 183 151.1 78
Show 19444-1102 CLS 1 254 1.8 83
Show 19502-1000 RST4643 AB 264 1.5 85
Show 19502-1000 GII 286 Aa,Ab 126 0.1 85
Show 19539-1237 J 2288 100 4.6 94
Show 19548-1223 HJ 602 309 6.7 94
Show 19435-1055 TDT1677 57 2.7 98
Show 19510-1301 LEO 46 112 4.2 98
Show 19506-0947 KPP 444 223 3.6 99
Show 19555-1026 GWP2908 121 8.3 103
Show 19539-1248 UC 4048 202 21.9 104
Show 19463-0950 BRT 553 91 19.5 108
Show 19430-1040 GWP2883 175 20.7 109
Show 19573-1109 UC 4058 197 13.2 112
Show 19447-0958 BRT1952 356 3.6 115
Show 19419-1117 RST4638 AB 204 5.9 117
Show 19565-1016 GWP2911 213 31.0 121
Show 19565-1240 LDS 858 157 19.1 126
Show 19460-1318 GWP2892 173 218.7 127
Show 19453-1314 STF2565 40 5.5 128
Show 19573-1234 LDS4824 77 62.7 131
Show 19557-1305 HLD 153 106 1.9 133
Show 19422-1015 RST4639 20 0.7 133
Show 19438-0945 RST4640 305 0.6 133
Show 19496-1340 BRT2767 54 5.5 136
Show 19480-1342 DRS 66 190 4.6 140
Show 19432-0937 AOT 76 110 15.4 145
Show 19457-1337 GWP2889 32 238.9 146
Show 19580-1245 RST4051 128 1.8 146
Show 19401-1153 TDS1004 27 2.5 146
Show 19400-1201 BRT2763 216 6.4 147
Show 19397-1115 WFC 255 176 12.8 149
Show 19563-1321 STF2602 147 12.3 151
Show 19450-1339 BRT2765 121 4.6 152

 
 
WDS 19498-1125 : COMPONENTS
 
 
  A B
B pa=286.9°
sep=44.09"
 
C pa=107.0°
sep=61.11"
pa=107.0°
sep=105.20"
 
 
19498-1125 A
 
 
Name HD 187306 Coord arcsec 2000 194946.74-112431.8 Mag 7.32 Spectral class F4V (yellow-white)
PmRA 38.00 PmDE -62.0 SAO 163020 HIP 97561
Tycho2 5733-01936-1 HD 187306 GC 27437 BD BD-11 5143
Tycho2
Tycho2 5733-01936-1 Pflag RAmdeg 297.44476424 DEmdeg -11.40884563
PmRA 41.0 PmDE -61.8 E RAmdeg 4 E DEmdeg 5
E pmRA 1.1 E pmDE 1.2 EpRAm 1991.39 EpDEm 1991.09
Num 13 Q RAmdeg 0.2 Q DEmdeg 1.0 Q pmRA 0.4
Q pmDE 0.9 BTmag 7.799 E BTmag 0.015 VTmag 7.316
E VTmag 0.010 Prox 435 TYC T HIP 97561
CCDM RAdeg 297.44466889 DEdeg -11.40870083 EpRA 1990 1.77
EpDE 1990 1.58 E RAdeg 4.0 E DEdeg 4.7 Posflg
Corr -0.4
SAO
SAO 163020 DelFlag RA1950 PmRA1950 0.0034
DE1950 PmDE1950 -0.07 Vmag 7 SpType F5
Double code Source 70 CatNum 27437 DM BD-11 5143
DMcomp BDsup HD 187306 M HD 0
GC 27437 RA1950rad 5.17932105 DE1950rad -0.2013218 PmRA2000 0.0036
PmDE2000 -0.07
Hipparcos
Catalog H HIP 97561 Proxy RAhms 19 49 46.72
DEdms -11 24 31.3 Vmag 7.26 VarFlag R Vmag H
RAdeg 297.445 DEdeg -11.4087 AstroRef Plx 12.34
CCDM 19498-1125 N CCDM I Nsys 2 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 187306 BD BD-11 5143
CD CP Dm number -11 5143 VIred 0.52
SpType F5 R SpType Coord arcsec 2000 194946.72-112431.3
Hipparcos 2
HIP 97561 Sn 5 So 0 Nc 1
RArad 5.1913886926 DErad -0.1991193037 Plx 10.94 PmRA 38.24
PmDE -62.25 E RArad 0.62 E DErad 0.33 E Plx 0.66
E pmRA 0.77 E pmDE 0.36 Hpmag 7.3612 E Hpmag 0.0009
SHp 0.007 VA 0 BV 0.455 E BV 0.015
VI 0.52
CCDM
Ccdm 19498-1125 RComp Comp A Note1
Note2 Discov num DRAs -1.20 DDEs 27.5
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.2 Sp F5 PmNote *
PmRA 50 PmDE -70 Dm number -11 5143 Cat1 BD
Name2 163020 Cat2 SAO HD 187306 M HD
ADS BDS B 9636 M ADS BDS N IDS IDS 19442S1139A
HIC 97561
 
 
19498-1125 B
 
 
Coord arcsec 2000 194943.87-112419.0 Mag 10.67 PmRA -9.00 PmDE -16.0
HIP 97558 Calc delta mag 3.35 Calc coord yes
Hipparcos
Catalog H HIP 97558 Proxy RAhms 19 49 43.87
DEdms -11 24 19.5 Vmag 10.69 VarFlag R Vmag H
RAdeg 297.433 DEdeg -11.4054 AstroRef Plx 1.64
CCDM 19498-1125 N CCDM I Nsys 2 Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD BD
CD CP Dm number VIred 0.74
SpType R SpType Coord arcsec 2000 194943.87-112419.5
Hipparcos 2
HIP 97558 Sn 5 So 0 Nc 1
RArad 5.191181775 DErad -0.1990619666 Plx 1.45 PmRA -11.31
PmDE -13.27 E RArad 2.72 E DErad 1.49 E Plx 2.89
E pmRA 3.8 E pmDE 1.85 Hpmag 10.8146 E Hpmag 0.006
SHp 0.042 VA 0 BV 0.563 E BV 0.098
VI 0.64
CCDM
Ccdm 19498-1125 RComp Comp B Note1
Note2 Discov num STF2581 DRAs DDEs
R dRAs Year 1879 Theta 282 Rho 38.2
Obs 3 Vmag 8.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS B 9636 M ADS BDS N N IDS IDS 19442S1139B
HIC 97558
 
 
19498-1125 C
 
 
Coord arcsec 2000 194950.71-112449.7 Mag 16.4 PmRA 25.00 PmDE -63.0
Calc delta mag 9.08 Calc coord yes