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Doubles in session


Current system
18490+2110
STF 2401 AB
HD 174261


Nearby doubles
18' : 18487+2053
RAS 27

19' : 18498+2124
HU 327

27' : 18473+2125
GRV 239

31' : 18509+2058
COU 317AB

31' : 18500+2043
HU 328

37' : 18515+2117
TDT1091

41' : 18498+2149
BRT2449

44' : 18482+2028
TDT1060

48' : 18517+2041
J 809

49' : 18523+2126
ISO 8

53' : 18527+2112
TDT1103

59' : 18511+2200
TDT1086

60' : 18457+2033
HJ 2839AB

61' : 18528+2043
TDT1105

64' : 18490+2213
GRV 241

68' : 18472+2213
JNN 119

68' : 18443+2052
HU 325

69' : 18490+2219
TDT1068

72' : 18505+2002
KU 121

73' : 18523+2206
TDT1096

77' : 18474+1957
TDT1056

78' : 18444+2015
ALD 4AB

78' : 18496+1953
MMA 28

80' : 18508+1954
KPP 426

81' : 18525+2007
TDT1101

81' : 18501+1952
TDT1079



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.

18490+2110 STF 2401 AB (HD 174261)

 
 
18h 48m 57.83s +21° 10' 01.3" P.A. 38.00 sep 4.1 mag 7.27,9.27 Sp B3V dist. 2941.18 pc (9594.13 l.y.)
 
 
Coord 2000 18490+2110 Discov num STF2401 Comp AB Coord arcsec 2000 18 48 57.83 +21 10 01.3
Date first 1828 Date last 2017 Obs 61
Pa first 38 Pa last 38 P.A. Now (θ) 38°
Sep first 4.1 Sep last 4.11 Sep. Now (ρ) 4.11"
Mag pri 7.27 Mag sec 9.27 delta mag (ΔM) 2 Spectral class B3V (blue-white)
Pri motion ra -001 Sec motion ra +004
Pri motion dec -012 Sec motion dec -005
Notes
rPM=0.714
Nature of this double is uncertain.
 
 
18490+2110 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 174261 86458 18 48 58 +21 10 01 STF 2401 AB 2017 61 38 4.1 7.27 9.27 2.00 <===
Show 86458 18 48 58 +21 10 01 STF 2401 AC 2005 10 149 92.9 7.27 11.09 3.82
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 174261 Constellation Hercules SAO 86458 HIP 92321
Tycho2 1596-02516-1 Gaia DR2 4531259083629611776 HD 174261 GC 25789
BD BD+21 3560 Distance 2941.18 Distance ly 9594.13
 
 
WDS 18490+2110 STF 2401 AB (HD 174261) : 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
18490+2110 STF2401 AB 2005 51 38 4.1 7.27 9.27 B3V D 184857.83+211001.3
18490+2110 STF2401 AB 2006 52 38 4.2 7.27 9.27 B3V D 184857.83+211001.3
18490+2110 STF2401 AB 2008 55 38 4.3 7.27 9.27 B3V D 184857.83+211001.3
18490+2110 STF2401 AB 2010 58 39 4.3 7.27 9.27 B3V D 184857.83+211001.3
18490+2110 STF2401 AB 2011 59 38 4.3 7.27 9.27 B3V D 184857.83+211001.3
18490+2110 STF2401 AB 2017 61 38 4.1 7.27 9.27 B3V 184857.83+211001.3

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

 
 
WDS 18490+2110 STF 2401 AB (HD 174261) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18490+2110 STF 2401 AB (HD 174261) : MEASURES
 
 
No records found.

 
 
WDS 18490+2110 (HD 174261) : VIRTUAL EYEPIECE
 
 

18490+2110 STF2401A mag 7.27 Sp B3V 18490+2110 STF2401B sep 4.0 P.A. 36.10 mag 9.27 18490+2110 STF2401C sep 91.2 P.A. 150.40 mag 11.09 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 18490+2110 (HD 174261) : ALADIN DSS IMAGE @ 18h 48m 57.83s +21° 10' 01.3"
 
 
 
 
WDS 18490+2110 STF 2401 AB (HD 174261) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18490+2110 STF2401AB distance=0' 18487+2053 RAS 27 distance=18' 18498+2124 HU 327 distance=19' 18473+2125 GRV 239 distance=27' 18509+2058 COU 317AB distance=31' 18509+2058 COU 317AC distance=31' 18500+2043 HU 328 distance=31' 18515+2117 TDT1091 distance=37' 18498+2149 BRT2449 distance=41' 18482+2028 TDT1060 distance=44' 18517+2041 J 809 distance=48' 18523+2126 ISO 8 distance=49' 18527+2112 TDT1103 distance=53' 18511+2200 TDT1086 distance=59' 18457+2033 HJ 2839AB distance=60' 18457+2033 HJ 2839AC distance=60' 18457+2033 HJ 2839AD distance=60' 18457+2033 HJ 2839AE distance=60' 18528+2043 TDT1105 distance=61' 18490+2213 GRV 241 distance=64' 18472+2213 JNN 119 distance=68' 18443+2052 HU 325 distance=68' 18490+2219 TDT1068 distance=69' 18505+2002 KU 121 distance=72' 18523+2206 TDT1096 distance=73' 18474+1957 TDT1056 distance=77' 18444+2015 ALD 4AB distance=78' 18444+2015 DAM 640AC distance=78' 18496+1953 MMA 28 distance=78' 18508+1954 KPP 426 distance=80' 18525+2007 TDT1101 distance=81' 18501+1952 TDT1079 distance=81' 18515+2223 TDT1090 distance=82' 18545+2037 STF2415 distance=85' 18542+2158 TDS 952 distance=88' 18425+2116 BRT2448 distance=92' 18444+2003 GRV 238 distance=92' 18469+2243 TDT1052 distance=98' 18443+2224 HU 1657 distance=99' 18449+2234 HDS2655 distance=101' 18442+2231 COU 209AB distance=105' 18442+2231 COU 209AC distance=105' 18426+2209 COU 208 distance=106' 18511+2253 COU 318 distance=108' 18567+2123 HDS2684 distance=109' 18412+2111 TDT 994 distance=110' 18489+1920 DCH 121 distance=111' 18430+1955 TDS 936 distance=113' 18525+2253 GRV 242 distance=116' 18408+2142 HU 324 distance=118' 18509+2305 POU3566 distance=119' 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 18490+2110 STF2401 AB 38 4.1
Show 18490+2110 STF2401 AC 149 92.9
Show 18487+2053 RAS 27 218 1.2 18
Show 18498+2124 HU 327 60 0.3 19
Show 18473+2125 GRV 239 244 7.6 27
Show 18509+2058 COU 317 AB 94 1.5 31
Show 18509+2058 COU 317 AC 2 17.3 31
Show 18500+2043 HU 328 187 4.8 31
Show 18515+2117 TDT1091 297 0.7 37
Show 18498+2149 BRT2449 229 3.9 41
Show 18482+2028 TDT1060 175 0.6 44
Show 18517+2041 J 809 211 1.6 48
Show 18523+2126 ISO 8 138 0.2 49
Show 18527+2112 TDT1103 278 1.3 53
Show 18511+2200 TDT1086 117 0.6 59
Show 18457+2033 HJ 2839 AB 57 74.8 60
Show 18457+2033 HJ 2839 AC 59 73.0 60
Show 18457+2033 HJ 2839 AD 336 25.4 60
Show 18457+2033 HJ 2839 AE 13 61.1 60
Show 18528+2043 TDT1105 12 0.6 61
Show 18490+2213 GRV 241 175 27.1 64
Show 18472+2213 JNN 119 270 0.4 68
Show 18443+2052 HU 325 6 0.4 68
Show 18490+2219 TDT1068 15 0.5 69
Show 18505+2002 KU 121 312 31.5 72
Show 18523+2206 TDT1096 313 1.6 73
Show 18474+1957 TDT1056 171 4.6 77
Show 18444+2015 ALD 4 AB 338 4.1 78
Show 18444+2015 DAM 640 AC 169 11.0 78
Show 18496+1953 MMA 28 70 13.9 78
Show 18508+1954 KPP 426 97 4.6 80
Show 18525+2007 TDT1101 117 0.6 81
Show 18501+1952 TDT1079 295 1.3 81
Show 18515+2223 TDT1090 306 0.8 82
Show 18545+2037 STF2415 290 2.0 85
Show 18542+2158 TDS 952 70 1.1 88
Show 18425+2116 BRT2448 294 3.8 92
Show 18444+2003 GRV 238 345 36.6 92
Show 18469+2243 TDT1052 77 0.5 98
Show 18443+2224 HU 1657 244 0.3 99
Show 18449+2234 HDS2655 196 0.3 101
Show 18442+2231 COU 209 AB 38 2.1 105
Show 18442+2231 COU 209 AC 204 39.8 105
Show 18426+2209 COU 208 304 0.3 106
Show 18511+2253 COU 318 286 3.4 108
Show 18567+2123 HDS2684 350 0.6 109
Show 18412+2111 TDT 994 27 0.7 110
Show 18489+1920 DCH 121 10 0.4 111
Show 18430+1955 TDS 936 157 2.0 113
Show 18525+2253 GRV 242 179 26.2 116
Show 18408+2142 HU 324 113 0.9 118

 
 
WDS 18490+2110 : COMPONENTS
 
 
  A B
B pa=36.1°
sep=4.01"
 
C pa=150.4°
sep=91.25"
pa=152.7°
sep=92.98"
 
 
18490+2110 A
 
 
Name HD 174261 Coord arcsec 2000 184857.83+211001.3 Mag 7.27 Spectral class B3V (blue-white)
PmRA -1.00 PmDE -12.0 SAO 86458 HIP 92321
Tycho2 1596-02516-1 HD 174261 GC 25789 BD BD+21 3560
Tycho2
Tycho2 1596-02516-1 Pflag RAmdeg 282.24096843 DEmdeg 21.16700482
PmRA -1.3 PmDE -11.7 E RAmdeg 4 E DEmdeg 4
E pmRA 1.1 E pmDE 1.0 EpRAm 1991.38 EpDEm 1991.48
Num 11 Q RAmdeg 2.8 Q DEmdeg 4.2 Q pmRA 2.8
Q pmDE 4.3 BTmag 7.220 E BTmag 0.015 VTmag 7.270
E VTmag 0.011 Prox 43 TYC T HIP 92321
CCDM A RAdeg 282.24097083 DEdeg 21.16703056 EpRA 1990 1.59
EpDE 1990 1.75 E RAdeg 4.3 E DEdeg 4.2 Posflg
Corr 0.3
SAO
SAO 86458 DelFlag RA1950 PmRA1950 0.0011
DE1950 PmDE1950 0.001 Vmag 7.2 SpType B5
Double code Source 70 CatNum 25789 DM BD+21 3560
DMcomp BDsup HD 174261 M HD 0
GC 25789 RA1950rad 4.91669191 DE1950rad 0.36842893 PmRA2000 0.0012
PmDE2000 0.001
Hipparcos
Catalog H HIP 92321 Proxy H RAhms 18 48 57.83
DEdms +21 10 01.3 Vmag 7.13 VarFlag R Vmag G
RAdeg 282.241 DEdeg 21.167 AstroRef A Plx 1.26
CCDM 18490+2110 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 38 Rho 4.267 HD 174261 BD BD+21 3560
CD CP Dm number +21 3560 VIred 0.03
SpType B5V R SpType Coord arcsec 2000 184857.83+211001.3
Hipparcos 2
HIP 92321 Sn 15 So 3 Nc 2
RArad 4.9260342247 DErad 0.3694343919 Plx 0.34 PmRA 2.78
PmDE -5.65 E RArad 0.39 E DErad 0.55 E Plx 0.84
E pmRA 0.58 E pmDE 0.7 Hpmag 7.1205 E Hpmag 0.001
SHp 0.011 VA 0 BV 0.01 E BV 0.015
VI 0.03
CCDM
Ccdm 18490+2110 RComp Comp A Note1
Note2 Discov num DRAs -2.16 DDEs 0.5
R dRAs 10 Year Theta Rho
Obs 3 Vmag 7.1 Sp B5 PmNote *
PmRA -1 PmDE -27 Dm number +21 3560 Cat1 BD
Name2 +21 1895 Cat2 AGK2/3 HD 174261 M HD
ADS BDS A11715 M ADS BDS N IDS IDS 18447N2103A
HIC 92321
 
 
18490+2110 B
 
 
Coord arcsec 2000 184858.00+211004.5 Mag 9.27 PmRA 4.00 PmDE -5.0
Calc delta mag 2 Calc coord yes
CCDM
Ccdm 18490+2110 RComp Comp B Note1
Note2 Discov num STF2401 DRAs DDEs
R dRAs Year 1828 Theta 038 Rho 4.3
Obs 22 Vmag 8.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11715 M ADS BDS N IDS IDS 18447N2103B
HIC 92321
 
 
18490+2110 C
 
 
Coord arcsec 2000 184901.05+210841.9 Mag 11.09 PmRA 16.00 PmDE 2.0
Calc delta mag 3.82 Calc coord yes
CCDM
Ccdm 18490+2110 RComp Comp C Note1
Note2 Discov num STF2401 DRAs DDEs
R dRAs Year 1935 Theta 150 Rho 78.6
Obs 1 Vmag Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11715 M ADS BDS N IDS IDS 18447N2103C
HIC