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Current system
17581+5213
STF 2261 AB
HD 164394


Nearby doubles
30' : 18012+5217
KPP 407

44' : 18003+5251
STF2271AB

46' : 17566+5129
BU 633AB
Eltanin

54' : 17599+5304
HO 563AB

61' : 17571+5313
TDT 595

63' : 17574+5111
ES 78AB

63' : 17551+5117
KPP2198

66' : 18000+5316
A 1886

66' : 17578+5107
DAM 686

70' : 18054+5155
COU2513

73' : 18027+5312
TDT 650

87' : 18046+5111
WIS 323

90' : 18001+5045
KPP1193

94' : 18061+5116
COU2514

94' : 17480+5224
MMA 38

94' : 18051+5322
TOK 614

96' : 17598+5039
COU2390

99' : 18041+5053
COU2391

99' : 17473+5218
CVR 863

101' : 18046+5053
STF2279

103' : 17500+5103
ES 779

104' : 18091+5153
WIS 325

106' : 17521+5344
TOI1261

107' : 17585+5359
KPP 697

110' : 18048+5344
HDS2546

110' : 17543+5357
A 1885



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.

17581+5213 STF 2261 AB (HD 164394)

 
 
17h 58m 05.37s +52° 13' 06.0" P.A. 261.00 sep 9.6 mag 7.56,10.02 Sp A2 dist. 113.64 pc (370.69 l.y.)
 
 
Coord 2000 17581+5213 Discov num STF2261 Comp AB Coord arcsec 2000 17 58 05.37 +52 13 06.0
Date first 1829 Date last 2018 Obs 31
Pa first 263 Pa last 260.6 P.A. Now (θ) 260.6°
Sep first 9.2 Sep last 9.55 Sep. Now (ρ) 9.55"
Mag pri 7.56 Mag sec 10.02 delta mag (ΔM) 2.46 Spectral class A2 (white)
Pri motion ra +012 Sec motion ra +008
Pri motion dec -021 Sec motion dec -022
Notes
rPM=0.17 (< 0.3, Physical double)
This double is physical.
 
 
17581+5213 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 164394 30665 17 58 05 +52 13 06 STF 2261 AB 2018 31 261 9.6 7.56 10.02 2.46 <===
Show 30665 17 58 05 +52 13 06 WAL 87 AC 2018 3 57 64.4 7.56 12.07 4.51
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 164394 Constellation Draco SAO 30665 HIP 87960
Tycho2 3523-00314-1 Gaia DR2 1367936092956367232 HD 164394 GC 24489
BD BD+52 2119 Distance 113.64 Distance ly 370.69
 
 
WDS 17581+5213 STF 2261 AB (HD 164394) : 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.
Wal1934 Ma j Wallenquist, A. 1934AnBos...6....3W
Wal1934 Ann. Bosscha Obs. Lembang 6, Pt.2, 1934
Wal1944a Zw - Wallenquist, A. 1954MeUpp...85.....
Wal1944a Medd. Uppsala Obs. #85, 1944
Wal1944a (Visual measures with wedge photometer attached to 14-inch refractor. No dates
Wal1944a given for measures; default date = decade of publication added.)
Wal1944b Zw - Wallenquist, A. 1954MeUpp...87.....
Wal1944b Medd. Uppsala Obs. #87, 1944
Wal1944b (Visual measures with wedge photometer attached to 14-inch refractor. No dates
Wal1944b given for measures; default date = decade of publication added.)
Wal1947 Zw - Wallenquist, A. 1947UppAn...2....2W
Wal1947 Ann. Uppsala Astron. Obs. 2, No.2, 1947
Wal1947 (A catalogue containing results of the two prior series, plus additional measures
Wal1947 with the 14-inch refractor and wedge photometer)
Wal1948 Zw - Wallenquist, A. 1948UppAn...2....3W
Wal1948 Ann. Uppsala Astron Obs. 2, #3, 1948
Wal1948 (Visual measures of southern double stars made with 17-inch refractor of La Plata
Wal1948 and wedge photometer. No dates listed; default date = decade of publication added)
Wal1950 Zd - Wallenquist, A. 1950MeUpp..103.....
Wal1950 Medd. Uppsala Obs. #103, 1950
Wal1954 Zw - Wallenquist, A. 1954UppAn...4Q....W
Wal1954 Ann. Uppsala Astron Obs. 4, #2, 1954
Wal1954 ("General Catalogue of Differences in Magnitude of Double Stars". Weighted mean
Wal1954 values from numerous sources)
Wal1958 Zw - Wallenquist, A. 1958MeUpp..118.....
Wal1958 Medd. Uppsala Obs. #118, 1958
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17581+5213 STF2261 AB 2000 21 262 9.5 7.56 10.02 A2 D 175805.37+521306.0
17581+5213 STF2261 AB 2010 22 262 9.4 7.56 10.02 A2 D 175805.37+521306.0
17581+5213 STF2261 AB 2011 23 261 9.6 7.56 10.02 A2 D 175805.37+521306.0
17581+5213 STF2261 AB 2015 25 262 9.6 7.56 10.02 A2 175805.37+521306.0
17581+5213 STF2261 AB 2018 30 261 9.6 7.56 10.02 A2 175805.37+521306.0

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

 
 
WDS 17581+5213 STF 2261 AB (HD 164394) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 17581+5213 STF 2261 AB (HD 164394) : MEASURES
 
 
No records found.

 
 
WDS 17581+5213 (HD 164394) : VIRTUAL EYEPIECE
 
 

17581+5213 STF2261A mag 7.56 Sp A2 17581+5213 STF2261B sep 6.0 P.A. 254.90 mag 10.02 17581+5213 WAL 87C sep 48.1 P.A. 43.80 mag 12.07 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 17581+5213 (HD 164394) : ALADIN DSS IMAGE @ 17h 58m 05.37s +52° 13' 06.0"
 
 
 
 
WDS 17581+5213 STF 2261 AB (HD 164394) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

17581+5213 STF2261AB distance=0' 18012+5217 KPP 407 distance=30' 18003+5251 STF2271AB distance=44' 18003+5251 STF2271AC distance=44' 17566+5129 BU 633AB (Eltanin) distance=46' 17566+5129 BU 633AC (Eltanin) distance=46' 17566+5129 BU 633AD (Eltanin) distance=46' 17566+5129 BU 633AE (Eltanin) distance=46' 17566+5129 BU 633AF (Eltanin) distance=46' 17566+5129 BU 633AG (Eltanin) distance=46' 17599+5304 HO 563AB distance=54' 17599+5304 HO 563AC distance=54' 17571+5313 TDT 595 distance=61' 17574+5111 ES 78AB distance=63' 17574+5111 FOX9011AC distance=63' 17551+5117 KPP2198 distance=63' 18000+5316 A 1886 distance=66' 17578+5107 DAM 686 distance=66' 18054+5155 COU2513 distance=70' 18027+5312 TDT 650 distance=73' 18046+5111 WIS 323 distance=87' 18001+5045 KPP1193 distance=90' 18061+5116 COU2514 distance=94' 17480+5224 MMA 38 distance=94' 18051+5322 TOK 614 distance=94' 17598+5039 COU2390 distance=96' 18041+5053 COU2391 distance=99' 17473+5218 CVR 863 distance=99' 18046+5053 STF2279 distance=101' 17500+5103 ES 779 distance=103' 18091+5153 WIS 325 distance=104' 17521+5344 TOI1261 distance=106' 17585+5359 KPP 697 distance=107' 18048+5344 HDS2546 distance=110' 17543+5357 A 1885 distance=110' 18026+5358 ES 781 distance=113' 18105+5217 KPP4089 distance=114' 18091+5312 MLR 584 distance=117' 18091+5314 FMR 139 distance=117' 18075+5054 KPP4085 distance=118' 17452+5157 STF2225AB distance=121' 17452+5157 STF2225AC distance=121' 17491+5047 CHR 65Aa,Ab distance=121' 17491+5047 LEP 86AB distance=121' 18109+5139 ES 642 distance=123' 17598+5416 ES 780 distance=124' 17452+5157 B 9005CE distance=124' 17452+5157 STF2225CD distance=124' 17499+5036 BEM9016 distance=125' 17464+5102 DAM 266 distance=130' 18097+5329 BEM 31 distance=130' 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 17581+5213 STF2261 AB 261 9.6
Show 17581+5213 WAL 87 AC 57 64.4
Show 18012+5217 KPP 407 54 4.8 30
Show 18003+5251 STF2271 AB 267 3.5 44
Show 18003+5251 STF2271 AC 17 160.8 44
Show Eltanin 17566+5129 BU 633 AB 152 21.1 46
Show Eltanin 17566+5129 BU 633 AC 234 41.2 46
Show Eltanin 17566+5129 BU 633 AD 11 59.5 46
Show Eltanin 17566+5129 BU 633 AE 235 96.0 46
Show Eltanin 17566+5129 BU 633 AF 114 126.0 46
Show Eltanin 17566+5129 BU 633 AG 28 143.6 46
Show 17599+5304 HO 563 AB 184 0.7 54
Show 17599+5304 HO 563 AC 243 69.8 54
Show 17571+5313 TDT 595 77 0.5 61
Show 17574+5111 ES 78 AB 130 8.1 63
Show 17574+5111 FOX9011 AC 194 31.6 63
Show 17551+5117 KPP2198 35 18.2 63
Show 18000+5316 A 1886 339 4.7 66
Show 17578+5107 DAM 686 191 6.7 66
Show 18054+5155 COU2513 54 1.0 70
Show 18027+5312 TDT 650 125 1.1 73
Show 18046+5111 WIS 323 193 187.4 87
Show 18001+5045 KPP1193 108 9.3 90
Show 18061+5116 COU2514 35 0.1 94
Show 17480+5224 MMA 38 180 35.7 94
Show 18051+5322 TOK 614 83 999.9 94
Show 17598+5039 COU2390 179 0.1 96
Show 18041+5053 COU2391 97 2.2 99
Show 17473+5218 CVR 863 178 7.9 99
Show 18046+5053 STF2279 180 13.6 101
Show 17500+5103 ES 779 342 9.4 103
Show 18091+5153 WIS 325 82 999.9 104
Show 17521+5344 TOI1261 317 1.7 106
Show 17585+5359 KPP 697 94 6.2 107
Show 18048+5344 HDS2546 236 0.6 110
Show 17543+5357 A 1885 81 0.4 110
Show 18026+5358 ES 781 281 4.3 113
Show 18105+5217 KPP4089 336 2.6 114
Show 18091+5312 MLR 584 177 2.7 117
Show 18091+5314 FMR 139 149 22.2 117
Show 18075+5054 KPP4085 249 24.9 118
Show 17452+5157 STF2225 AB 339 5.5 121
Show 17452+5157 STF2225 AC 245 230.2 121
Show 17491+5047 CHR 65 Aa,Ab 112 0.1 121
Show 17491+5047 LEP 86 AB 141 209.1 121
Show 18109+5139 ES 642 273 7.2 123
Show 17598+5416 ES 780 124 4.0 124
Show 17452+5157 B 9005 CE 302 65.1 124
Show 17452+5157 STF2225 CD 296 8.7 124
Show 17499+5036 BEM9016 17 4.1 125
Show 17464+5102 DAM 266 176 5.6 130

 
 
WDS 17581+5213 : COMPONENTS
 
 
  A B
B pa=254.9°
sep=5.98"
 
C pa=43.8°
sep=48.08"
pa=47.1°
sep=53.28"
 
 
17581+5213 A
 
 
Name HD 164394 Coord arcsec 2000 175805.37+521306.0 Mag 7.56 Spectral class A2 (white)
PmRA 12.00 PmDE -21.0 SAO 30665 HIP 87960
Tycho2 3523-00314-1 HD 164394 GC 24489 BD BD+52 2119
Tycho2
Tycho2 3523-00314-1 Pflag RAmdeg 269.52241723 DEmdeg 52.21827716
PmRA 7.2 PmDE -24.3 E RAmdeg 5 E DEmdeg 5
E pmRA 1.0 E pmDE 1.1 EpRAm 1991.11 EpDEm 1991.26
Num 12 Q RAmdeg 0.8 Q DEmdeg 1.0 Q pmRA 0.8
Q pmDE 1.0 BTmag 7.827 E BTmag 0.015 VTmag 7.555
E VTmag 0.011 Prox 96 TYC T HIP 87960
CCDM A RAdeg 269.52238972 DEdeg 52.21833361 EpRA 1990 1.52
EpDE 1990 1.61 E RAdeg 4.6 E DEdeg 4.6 Posflg
Corr 0.0
SAO
SAO 30665 DelFlag RA1950 PmRA1950 0.0003
DE1950 PmDE1950 -0.023 Vmag 7.7 SpType A2
Double code Source 70 CatNum 24489 DM BD+52 2119
DMcomp BDsup HD 164394 M HD 0
GC 24489 RA1950rad 4.69913333 DE1950rad 0.91143882 PmRA2000 0.001
PmDE2000 -0.022
Hipparcos
Catalog H HIP 87960 Proxy H RAhms 17 58 05.37
DEdms +52 13 06.0 Vmag 7.43 VarFlag R Vmag H
RAdeg 269.522 DEdeg 52.2183 AstroRef A Plx 10.4
CCDM 17581+5213 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 262 Rho 9.558 HD 164394 BD BD+52 2119
CD CP Dm number +52 2119 VIred 0.3
SpType A2+... R SpType Coord arcsec 2000 175805.37+521306.0
Hipparcos 2
HIP 87960 Sn 15 So 3 Nc 2
RArad 4.7040530436 DErad 0.9113818987 Plx 8.8 PmRA 10.69
PmDE -21.11 E RArad 0.56 E DErad 0.59 E Plx 0.61
E pmRA 0.61 E pmDE 0.74 Hpmag 7.5011 E Hpmag 0.0015
SHp 0.014 VA 0 BV 0.27 E BV 0.015
VI 0.3
CCDM
Ccdm 17581+5213 RComp Comp A Note1
Note2 Discov num DRAs -0.64 DDEs 5.3
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.9 Sp A2 PmNote *
PmRA -1 PmDE -30 Dm number +52 2119 Cat1 BD
Name2 +52 1160 Cat2 AGK2/3 HD 164394 M HD
ADS BDS A10953 M ADS BDS N IDS IDS 17558N5214A
HIC 87960
 
 
17581+5213 B
 
 
Coord arcsec 2000 175804.74+521304.4 Mag 10.02 PmRA 8.00 PmDE -22.0
Calc delta mag 2.46 Calc coord yes
CCDM
Ccdm 17581+5213 RComp Comp B Note1
Note2 Discov num STF2261 DRAs -1.65 DDEs 3.6
R dRAs 91 Year 1829 Theta 262 Rho 9.5
Obs 10 Vmag 9.9 Sp PmNote *
PmRA -1 PmDE -30 Dm number Cat1
Name2 +52 1159 Cat2 AGK2/3 HD M HD
ADS BDS A10953 M ADS BDS N IDS IDS 17558N5214B
HIC 87960
 
 
17581+5213 C
 
 
Coord arcsec 2000 175808.99+521340.7 Mag 12.07 Calc delta mag 4.51 Calc coord yes