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Current system
18031-0811
STF 2262 AB
Tau Oph


Nearby doubles
26' : 18053-0823
J 1645

44' : 18060-0807
A 2595

46' : 18061-0819
HDS2551

53' : 17596-0820
GWP2751

53' : 18025-0719
RST3992

65' : 18007-0717
LDS 621

88' : 18004-0929
RST3990

91' : 18092-0817
RST3998AB

98' : 17593-0651
STF2250AB

98' : 17589-0924
OSO 90AB

99' : 18096-0755
NSN 142

99' : 18081-0707
RST3997

103' : 18099-0755
HDS2561

105' : 17564-0845
RST3988

124' : 17550-0744
LLO 14

126' : 18009-1012
HU 236

126' : 18015-1014
BU 47

128' : 18086-0948
HDS2557

129' : 17587-0620
GWP2750

130' : 18013-0601
J 2511

131' : 18108-0710
RST3999

133' : 18010-1020
GWP2754

148' : 18008-0552
RST5546AB

151' : 17530-0755
STF3128AB

151' : 18131-0747
RST4001

154' : 17531-0852
HDS2523



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.

18031-0811 STF 2262 AB (Tau Oph)

 
 
18h 03m 04.91s -08° 10' 48.9" P.A. 292.00 sep 1.4 mag 5.27,5.86 Sp F4IV+F5V dist. 51.33 pc (167.44 l.y.)
 
 
Coord 2000 18031-0811 Discov num STF2262 Comp AB Coord arcsec 2000 18 03 04.91 -08 10 48.9
Date first 1835 Date last 2024 Obs 672
Pa first 193 Pa last 292.1 P.A. Now (θ) 292°
Sep first 0.4 Sep last 1.406 Sep. Now (ρ) 1.395"
Mag pri 5.27 Mag sec 5.86 delta mag (ΔM) 0.59 Spectral class F4IV+F5V (yellow-white/yellow-white)
Pri motion ra +009 Sec motion ra +009
Pri motion dec -048 Sec motion dec -048
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
18031-0811 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Tau Oph 142050 18 03 05 -08 10 49 STF 2262 AB 2024 672 292 1.4 5.27 5.86 0.59 Y <===
Show 142050 18 03 05 -08 10 49 STF 2262 AC 2000 13 125 100.8 5.27 11.28 6.01
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Tau Oph Var name NSV10073 Oph Constellation Ophiuchus SAO 142050
HIP 88404 Tycho2 5675-00662-1 Gaia DR2 4170583776094715520 HD 164761
HR 6733 GC 24565 ADS 11005 BD BD-08 4549
Bayer Tau Ophiuchi Bayer name Tau Oph Flamsteed 69 Ophiuchi Flamsteed name 69 Oph
Distance 51.33 Distance ly 167.44 Bayer greek τ Oph
 
 
ORBITAL ELEMENTS
 
 
Period (P)279.52y Periastron (T)1833.51y Semi-major axis (a)1.5855a
Eccentricity (e)0.765 Inclination (i)63.47° Longitude of periastron (ω)53.98°
Node (Ω)62.97° Notesn ReferenceFSU2025
Equinox Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 282.1 1.693
2001 282.4 1.682
2002 282.7 1.671
2003 283.1 1.660
2004 283.4 1.649
2005 283.8 1.638
2006 284.1 1.627
2007 284.5 1.616
2008 284.8 1.604
2009 285.2 1.593
2010 285.6 1.581
2011 285.9 1.570
2012 286.3 1.558
2013 286.7 1.546
2014 287.1 1.534
2015 287.5 1.522
2016 287.9 1.510
2017 288.3 1.497
2018 288.7 1.485
2019 289.2 1.473
2020 289.6 1.460
2021 290.0 1.447
2022 290.5 1.435
2023 290.9 1.422
2024 291.4 1.409
2025 291.9 1.396
2026 292.4 1.383
2027 292.8 1.370
2028 293.4 1.357
2029 293.9 1.343
2030 294.4 1.330
2031 294.9 1.317
2032 295.5 1.303
2033 296.0 1.290
2034 296.6 1.276
2035 297.2 1.262
2036 297.7 1.249
2037 298.4 1.235
2038 299.0 1.221
2039 299.6 1.207
2040 300.2 1.194
2041 300.9 1.180
2042 301.6 1.166
2043 302.3 1.152
2044 303.0 1.138
2045 303.7 1.124
2046 304.5 1.110
2047 305.2 1.096
2048 306.0 1.082
2049 306.8 1.068
2050 307.6 1.054


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds18031-0811c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS 18031-0811 STF 2262 AB (Tau Oph) : NOTES
 
 
discov_num notes refcode
STF2262 tau Oph = 69 Oph. A is a SB. RV of the primary may be variable. Wrz1959
Primary giant according to isochrone fit. Sod1999
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
AB: H 1 88. MEv2010
 
 
REFERENCES
 
 
refcode metd author reference
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
FSU2025 C u Shetty, D., Vasquez, F., Boyce, P., Boyce, G. & Harris, M. 2025JDSO...21...45S
FSU2025 JDSO 21, 45, 2025
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Sod1999 orb - Soderhjelm, S. 1999A&A...341..121S
Sod1999 A&A 341, 121, 1999
Wrz1959 orb - Wierzbinski, S. .
Wrz1959 Bull. Amis Sci. Poznan 15, 171, 1959
 
 
DISCOVERER
 
 
discov author
BAZ Baize, P.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr dm_number notes coord_arcsec_2000
18031-0811 STF2262 AB 2006 662 285 1.6 5.27 5.86 F4IV F5V -08 4549 NOD 180304.91-081048.9
18031-0811 STF2262 AB 2009 664 285 1.6 5.27 5.86 F4IV F5V -08 4549 NOD 180304.91-081048.9
18031-0811 STF2262 AB 2010 675 286 1.5 5.27 5.86 F4IV F5V -08 4549 NOD 180304.91-081048.9
18031-0811 STF2262 AB 2011 679 286 1.5 5.27 5.86 F4IV F5V -08 4549 NOD 180304.91-081048.9
18031-0811 STF2262 AB 2012 682 287 1.5 5.27 5.86 F4IV F5V -08 4549 NOD 180304.91-081048.9
18031-0811 STF2262 AB 2013 684 286 1.5 5.27 5.86 F4IV F5V -08 4549 NOD 180304.91-081048.9
18031-0811 STF2262 AB 2014 633 288 1.6 5.27 5.86 F4IV F5V -08 4549 NOD 180304.91-081048.9
18031-0811 STF2262 AB 2016 634 288 1.5 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9
18031-0811 STF2262 AB 2017 638 290 1.5 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9
18031-0811 STF2262 AB 2018 643 290 1.5 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9
18031-0811 STF2262 AB 2019 658 290 1.5 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9
18031-0811 STF2262 AB 2021 664 291 1.4 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9
18031-0811 STF2262 AB 2022 666 291 1.4 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9
18031-0811 STF2262 AB 2023 670 292 1.4 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9
18031-0811 STF2262 AB 2024 672 292 1.4 5.27 5.86 F4IV+F5V -08 4549 NO 180304.91-081048.9

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

 
 
WDS 18031-0811 STF 2262 AB (Tau Oph) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18031-0811 STF 2262 AB (Tau Oph) : MEASURES
 
 
No records found.

 
 
WDS 18031-0811 (Tau Oph) : VIRTUAL EYEPIECE
 
 

18031-0811 STF2262A mag 5.27 Sp F4IV 18031-0811 STF2262B sep 1.4 P.A. 292.10 mag 5.86 Sp F5V 18031-0811 STF2262C sep 100.8 P.A. 125.40 mag 11.28 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 18031-0811 (Tau Oph) : ALADIN DSS IMAGE @ 18h 03m 04.91s -08° 10' 48.9"
 
 
 
 
WDS 18031-0811 STF 2262 AB (Tau Oph) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18031-0811 STF2262AB distance=1' 18031-0811 STF2262AC distance=1' 18053-0823 J 1645 distance=26' 18060-0807 A 2595 distance=44' 18061-0819 HDS2551 distance=46' 17596-0820 GWP2751 distance=53' 18025-0719 RST3992 distance=53' 18007-0717 LDS 621 distance=65' 18004-0929 RST3990 distance=88' 18092-0817 RST3998AB distance=91' 18092-0817 B 2856AB,C distance=91' 17593-0651 STF2250AB distance=98' 17593-0651 SIN 106AC distance=98' 17589-0924 OSO 90AB distance=98' 17589-0924 OSO 90AC distance=98' 18096-0755 NSN 142 distance=99' 18081-0707 RST3997 distance=99' 18099-0755 HDS2561 distance=103' 17564-0845 RST3988 distance=105' 17550-0744 LLO 14 distance=124' 18009-1012 HU 236 distance=126' 18015-1014 BU 47 distance=126' 18086-0948 HDS2557 distance=128' 17587-0620 GWP2750 distance=129' 18013-0601 J 2511 distance=130' 18108-0710 RST3999 distance=131' 18010-1020 GWP2754 distance=133' 18008-0552 RST5546AB distance=148' 18124-0718 A 36A,BC distance=149' 18124-0718 A 36BC distance=150' 17530-0755 STF3128AB distance=151' 17530-0755 STF3128AC distance=151' 18131-0747 RST4001 distance=151' 17531-0852 HDS2523 distance=154' 17527-0757 STF2234 distance=155' 18057-0537 J 3269 distance=159' 17589-1046 KPP1587 distance=167' 18099-1027 TSN 186 distance=170' 17599-0525 A 34 distance=173' 17525-0649 WFC 200 distance=178' 18120-0601 A 37AB distance=186' 18154-0850 BRT 476 distance=186' 18034-1118 BRT2743 distance=188' 17591-0503 LSC 82 distance=198' 17526-0609 EVS 32AB distance=198' 17526-0609 KRV 46AC distance=198' 17533-0556 HO 561 distance=200' 18000-1133 HU 753 distance=208' 18063-0443 TDT 684 distance=214' 18114-0512 HO 267 distance=218' 17556-0503 RST5545AB distance=219' 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 18031-0811 STF2262 AB 292 1.4 1
Show 18031-0811 STF2262 AC 125 100.8 1
Show 18053-0823 J 1645 4 5.5 26
Show 18060-0807 A 2595 45 2.9 44
Show 18061-0819 HDS2551 98 0.1 46
Show 17596-0820 GWP2751 127 23.6 53
Show 18025-0719 RST3992 236 0.6 53
Show 18007-0717 LDS 621 298 7.2 65
Show 18004-0929 RST3990 93 2.4 88
Show 18092-0817 RST3998 AB 161 0.4 91
Show 18092-0817 B 2856 AB,C 123 11.9 91
Show 17593-0651 STF2250 AB 344 7.8 98
Show 17593-0651 SIN 106 AC 92 45.0 98
Show 17589-0924 OSO 90 AB 124 20.9 98
Show 17589-0924 OSO 90 AC 207 22.6 98
Show 18096-0755 NSN 142 44 25.1 99
Show 18081-0707 RST3997 82 1.3 99
Show 18099-0755 HDS2561 16 0.9 103
Show 17564-0845 RST3988 36 0.8 105
Show 17550-0744 LLO 14 293 5.9 124
Show 18009-1012 HU 236 156 0.2 126
Show 18015-1014 BU 47 89 0.7 126
Show 18086-0948 HDS2557 252 0.6 128
Show 17587-0620 GWP2750 67 8.8 129
Show 18013-0601 J 2511 74 4.7 130
Show 18108-0710 RST3999 176 0.2 131
Show 18010-1020 GWP2754 219 28.3 133
Show 18008-0552 RST5546 AB 130 1.0 148
Show 18124-0718 A 36 A,BC 39 71.3 149
Show 18124-0718 A 36 BC 207 1.3 150
Show 17530-0755 STF3128 AB 50 1.3 151
Show 17530-0755 STF3128 AC 86 97.1 151
Show 18131-0747 RST4001 278 1.9 151
Show 17531-0852 HDS2523 253 0.3 154
Show 17527-0757 STF2234 198 16.9 155
Show 18057-0537 J 3269 65 6.4 159
Show 17589-1046 KPP1587 359 12.1 167
Show 18099-1027 TSN 186 38 0.8 170
Show 17599-0525 A 34 290 1.4 173
Show 17525-0649 WFC 200 272 9.5 178
Show 18120-0601 A 37 AB 33 2.4 186
Show 18154-0850 BRT 476 135 4.0 186
Show 18034-1118 BRT2743 337 3.8 188
Show 17591-0503 LSC 82 150 0.5 198
Show 17526-0609 EVS 32 AB 212 18.1 198
Show 17526-0609 KRV 46 AC 199 81.3 198
Show 17533-0556 HO 561 328 35.4 200
Show 18000-1133 HU 753 129 5.5 208
Show 18063-0443 TDT 684 244 0.5 214
Show 18114-0512 HO 267 353 14.5 218
Show 17556-0503 RST5545 AB 283 1.0 219

 
 
WDS 18031-0811 : COMPONENTS
 
 
  A B
B pa=292.1°
sep=1.41"
 
C pa=125.4°
sep=100.79"
pa=125.2°
sep=102.16"
 
 
18031-0811 A
 
 
Name Tau Oph Coord arcsec 2000 180304.91-081048.9 Mag 5.27 Spectral class F4IV (yellow-white)
PmRA 9.00 PmDE -48.0 SAO 142050 HIP 88404
Tycho2 5675-00662-1 HD 164764 HR 6733 GC 24565
BD BD-08 4549 Bayer Tau Ophiuchi Bayer name Tau Flamsteed 69 Ophiuchi
Flamsteed name 69 Oph
Tycho2
Tycho2 5675-00662-1 Pflag P RAmdeg 270.77033367 DEmdeg -8.18034956
PmRA 8.8 PmDE -48.4 E RAmdeg 4 E DEmdeg 4
E pmRA 2.7 E pmDE 2.7 EpRAm 1991.90 EpDEm 1991.77
Num 3 Q RAmdeg 0.8 Q DEmdeg 4.5 Q pmRA 0.8
Q pmDE 4.6 BTmag 5.695 E BTmag 0.014 VTmag 5.269
E VTmag 0.009 Prox 18 TYC T HIP 88404
CCDM A RAdeg 270.77046139 DEdeg -8.18026500 EpRA 1990 1.92
EpDE 1990 1.79 E RAdeg 3.5 E DEdeg 4.0 Posflg D
Corr -0.1
SAO
SAO 142050 DelFlag RA1950 PmRA1950 0.0017
DE1950 PmDE1950 -0.039 Vmag 4.9 SpType F0
Double code Source 70 CatNum 24565 DM BD-08 4549
DMcomp BDsup HD 164764 M HD 9
GC 24565 RA1950rad 4.71395059 DE1950rad -0.14280227 PmRA2000 0.0019
PmDE2000 -0.037
Hipparcos
Catalog H HIP 88404 Proxy H RAhms 18 03 04.91
DEdms -08 10 48.9 Vmag 4.77 VarFlag R Vmag G
RAdeg 270.77 DEdeg -8.18026 AstroRef A Plx 19.22
CCDM 15.11 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 279 Rho 1.803 HD BD BD-08 4549
CD CP Dm number -08 4549 VIred 0.45
SpType F5V+... R SpType Coord arcsec 2000 180304.91-081048.9
Hipparcos 2
HIP 88404 Sn 17 So 3 Nc 2
RArad 4.7258360603 DErad -0.1427724316 Plx 19.48 PmRA 15.78
PmDE -37.79 E RArad 0.72 E DErad 0.44 E Plx 0.66
E pmRA 0.93 E pmDE 0.51 Hpmag E Hpmag 0.0006
SHp 0.005 VA 0 BV 0.41 E BV 0.014
VI 0.45
CCDM
Ccdm 18031-0811 RComp Comp A Note1
Note2 Discov num DRAs -1.03 DDEs 10.5
R dRAs 10 Year Theta Rho
Obs 3 Vmag 5.3 Sp F0 PmNote *
PmRA 26 PmDE -40 Dm number -08 4549 Cat1 BD
Name2 142050 Cat2 SAO HD 164765 M HD
ADS BDS A11005 M ADS BDS N IDS IDS 17576S0811A
HIC 88404
 
 
18031-0811 B
 
 
Coord arcsec 2000 180304.82-081048.4 Mag 5.86 Spectral class F5V (yellow-white) PmRA 9.00
PmDE -48.0 Delta magnitude 0.59 Coordinate calculated yes
CCDM
Ccdm 18031-0811 RComp Comp B Note1 *
Note2 Discov num STF2262 DRAs DDEs
R dRAs Year 1836 Theta Rho
Obs 99 Vmag 6.0 Sp F0 PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD 164764 M HD
ADS BDS A11005 M ADS BDS N IDS IDS 17576S0811B
HIC 88404
 
 
18031-0811 C
 
 
Coord arcsec 2000 180310.44-081147.3 Mag 11.28 PmRA 23.00 PmDE -18.0
Delta magnitude 6.01 Coordinate calculated yes
CCDM
Ccdm 18031-0811 RComp Comp C Note1
Note2 Discov num STF2262 DRAs DDEs
R dRAs Year 1879 Theta 127 Rho 100.3
Obs 5 Vmag 9.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11005 M ADS BDS N IDS IDS 17576S0811C
HIC