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Doubles in session


Current system
18126+1224
HDS 2570
HD 166976


Nearby doubles
9' : 18126+1215
GWP2768

29' : 18116+1247
BRT1293

33' : 18128+1151
BPM 743

36' : 18141+1156
ROE 142

37' : 18109+1251
ROE 110

39' : 18118+1147
BPM 740

42' : 18106+1155
BPM 737

45' : 18148+1153
ROE 143

46' : 18095+1216
SKF1352

47' : 18130+1138
BPM 744

47' : 18115+1307
BPM 738

51' : 18155+1156
ROE 144

52' : 18117+1313
BRT1294

54' : 18096+1255
BPM 736

56' : 18141+1314
J 2122

56' : 18160+1201
BRT1295

57' : 18160+1158
TDT 765

57' : 18089+1239
TDT 708

60' : 18116+1126
BPM 739

61' : 18164+1201
BPM 752

63' : 18086+1245
HDS2556

66' : 18128+1329
BPM 742

66' : 18094+1311
HEI 558

67' : 18081+1232
BPM 727

68' : 18170+1204
HDS2582

70' : 18166+1145
TOB 282



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.

18126+1224 HDS 2570 (HD 166976)

 
 
18h 12m 35.69s +12° 23' 36.9" P.A. 352.00 sep 0.1 mag 8.04,8.88 Sp F0III+A6V dist. 226.24 pc (737.99 l.y.)
 
 
Coord 2000 18126+1224 Discov num HDS2570 Comp Coord arcsec 2000 18 12 35.69 +12 23 36.9
Date first 1991 Date last 2021 Obs 8
Pa first 139 Pa last 352.4 P.A. Now (θ) 352.4°
Sep first 0.2 Sep last 0.062 Sep. Now (ρ) 0.062"
Mag pri 8.04 Mag sec 8.88 delta mag (ΔM) 0.84 Spectral class F0III+A6V (yellow-white/white)
Pri motion ra +006 Sec motion ra
Pri motion dec +002 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166976 Constellation Ophiuchus SAO 103481 HIP 89235
Tycho2 1017-01625-1 Gaia DR2 4496880653555218176 HD 166976 BD BD+12 3422
Distance 226.24 Distance ly 737.99
 
 
ORBITAL ELEMENTS
 
 
Period (P)85y Periastron (T)2009.87y Semi-major axis (a)0.158a
Eccentricity (e)0.45 Inclination (i)73° Longitude of periastron (ω)149.6°
Node (Ω)132.2° Notes ReferenceTok2020g
Equinox2000 Last observation2019 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 156.8 0.076
2001 162.5 0.063
2002 171.1 0.051
2003 184.8 0.040
2004 207.1 0.032
2005 237.1 0.030
2006 263.3 0.036
2007 280.2 0.046
2008 290.7 0.057
2009 297.8 0.068
2010 303.1 0.077
2011 307.3 0.084
2012 310.9 0.089
2013 314.3 0.092
2014 317.5 0.093
2015 320.7 0.091
2016 324.1 0.088
2017 327.8 0.084
2018 332.0 0.079
2019 336.7 0.073
2020 342.3 0.068
2021 348.9 0.062
2022 356.9 0.056
2023 6.4 0.052
2024 17.4 0.049
2025 29.5 0.047
2026 41.8 0.048
2027 53.5 0.050
2028 63.8 0.054
2029 72.4 0.059
2030 79.6 0.065


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds18126%2B1224a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18126+1224 HDS 2570 (HD 166976) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2020g orb - Tokovinin, A. 2020IAUDS.201....1A
Tok2020g Inf. Circ. 201, 1, 2020
 
 
DISCOVERER
 
 
idgroup discov author
1 HDS Hipparcos Double Star (from additional DD list)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18126+1224 HDS2570 1991 1 139 0.2 8.04 8.88 F0 181235.69+122336.9
18126+1224 HDS2570 2002 2 102 0.2 8.04 8.88 F0 181235.69+122336.9
18126+1224 HDS2570 2015 2 321 0.1 8.04 8.88 F0 181235.69+122336.9
18126+1224 HDS2570 2017 3 331 0.1 8.04 8.88 F0 181235.69+122336.9
18126+1224 HDS2570 2018 4 333 0.1 8.04 8.88 F0 181235.69+122336.9
18126+1224 HDS2570 2019 5 339 0.1 8.04 8.88 F0 181235.69+122336.9
18126+1224 HDS2570 2021 7 352 0.1 8.04 8.88 F0 O 181235.69+122336.9

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

 
 
WDS 18126+1224 HDS 2570 (HD 166976) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18126+1224 HDS 2570 (HD 166976) : MEASURES
 
 
No records found.

 
 
WDS 18126+1224 (HD 166976) : VIRTUAL EYEPIECE
 
 

18126+1224 HDS2570A mag 8.04 Sp F0III 18126+1224 HDS2570B sep 0.1 P.A. 352.60 mag 8.88 Sp A6V 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 18126+1224 (HD 166976) : ALADIN DSS IMAGE @ 18h 12m 35.69s +12° 23' 36.9"
 
 
 
 
WDS 18126+1224 HDS 2570 (HD 166976) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18126+1224 HDS2570 distance=1' 18126+1215 GWP2768 distance=9' 18116+1247 BRT1293 distance=29' 18128+1151 BPM 743 distance=33' 18141+1156 ROE 142 distance=36' 18109+1251 ROE 110 distance=37' 18118+1147 BPM 740 distance=39' 18106+1155 BPM 737 distance=42' 18148+1153 ROE 143 distance=45' 18095+1216 SKF1352 distance=46' 18130+1138 BPM 744 distance=47' 18115+1307 BPM 738 distance=47' 18155+1156 ROE 144 distance=51' 18117+1313 BRT1294 distance=52' 18096+1255 BPM 736 distance=54' 18141+1314 J 2122 distance=56' 18160+1201 BRT1295 distance=56' 18160+1158 TDT 765 distance=57' 18089+1239 TDT 708 distance=57' 18116+1126 BPM 739 distance=60' 18164+1201 BPM 752 distance=61' 18086+1245 HDS2556 distance=63' 18128+1329 BPM 742 distance=66' 18094+1311 HEI 558 distance=66' 18081+1232 BPM 727 distance=67' 18170+1204 HDS2582 distance=68' 18166+1145 TOB 282 distance=70' 18148+1327 HJ 1316 distance=71' 18076+1225 HEI 556 distance=73' 18143+1333 BPM 745 distance=74' 18076+1210 TDT 697 distance=75' 18126+1107 BPM 741 distance=77' 18130+1103 TOB 273 distance=81' 18163+1124 J 1270 distance=81' 18078+1304 H 5 74 distance=82' 18093+1329 STF2285 distance=82' 18174+1143 TOB 283 distance=82' 18150+1338 BPM 747 distance=82' 18131+1102 TOB 274 distance=83' 18083+1318 GWP2760AB distance=83' 18083+1318 GWP2761AC distance=83' 18083+1318 GWP2762AD distance=83' 18182+1209 GWP2770 distance=83' 18085+1324 UC 3504 distance=86' 18096+1106 BPM 735 distance=89' 18132+1053 ROE 121AB distance=91' 18132+1053 ROE 121AC distance=91' 18093+1105 BPM 734 distance=93' 18081+1114 TDT 700 distance=96' 18078+1116 JMA 1 distance=99' 18061+1257 BPM 722 distance=102' 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 18126+1224 HDS2570 352 0.1 1
Show 18126+1215 GWP2768 268 11.3 9
Show 18116+1247 BRT1293 74 5.4 29
Show 18128+1151 BPM 743 30 62.6 33
Show 18141+1156 ROE 142 229 3.8 36
Show 18109+1251 ROE 110 135 3.8 37
Show 18118+1147 BPM 740 329 110.9 39
Show 18106+1155 BPM 737 261 29.0 42
Show 18148+1153 ROE 143 90 4.2 45
Show 18095+1216 SKF1352 42 14.3 46
Show 18130+1138 BPM 744 207 116.5 47
Show 18115+1307 BPM 738 48 107.9 47
Show 18155+1156 ROE 144 291 6.5 51
Show 18117+1313 BRT1294 281 3.9 52
Show 18096+1255 BPM 736 193 85.2 54
Show 18141+1314 J 2122 329 5.6 56
Show 18160+1201 BRT1295 127 4.5 56
Show 18160+1158 TDT 765 172 1.0 57
Show 18089+1239 TDT 708 83 1.0 57
Show 18116+1126 BPM 739 309 46.0 60
Show 18164+1201 BPM 752 162 98.5 61
Show 18086+1245 HDS2556 124 0.5 63
Show 18128+1329 BPM 742 173 102.2 66
Show 18094+1311 HEI 558 142 2.7 66
Show 18081+1232 BPM 727 203 43.6 67
Show 18170+1204 HDS2582 88 0.1 68
Show 18166+1145 TOB 282 319 12.4 70
Show 18148+1327 HJ 1316 250 14.0 71
Show 18076+1225 HEI 556 114 1.8 73
Show 18143+1333 BPM 745 73 29.0 74
Show 18076+1210 TDT 697 167 2.2 75
Show 18126+1107 BPM 741 236 36.2 77
Show 18130+1103 TOB 273 174 17.4 81
Show 18163+1124 J 1270 39 2.8 81
Show 18078+1304 H 5 74 140 42.7 82
Show 18093+1329 STF2285 333 3.6 82
Show 18174+1143 TOB 283 35 12.7 82
Show 18150+1338 BPM 747 55 99.8 82
Show 18131+1102 TOB 274 113 21.4 83
Show 18083+1318 GWP2760 AB 11 28.6 83
Show 18083+1318 GWP2761 AC 40 99.6 83
Show 18083+1318 GWP2762 AD 73 159.4 83
Show 18182+1209 GWP2770 306 10.6 83
Show 18085+1324 UC 3504 333 50.0 86
Show 18096+1106 BPM 735 121 12.4 89
Show 18132+1053 ROE 121 AB 61 5.2 91
Show 18132+1053 ROE 121 AC 20 39.0 91
Show 18093+1105 BPM 734 287 119.1 93
Show 18081+1114 TDT 700 190 0.8 96
Show 18078+1116 JMA 1 167 6.3 99
Show 18061+1257 BPM 722 340 105.0 102

 
 
WDS 18126+1224 : COMPONENTS
 
 
  A
B pa=352.6°
sep=0.06"
 
 
18126+1224 A
 
 
Componente originario normalizzato AB Name HD 166976 Coord arcsec 2000 181235.69+122336.9 Mag 8.04
Spectral class F0III (yellow-white) PmRA 6.00 PmDE 2.0 SAO 103481
HIP 89235 Tycho2 1017-01625-1 HD 166976 BD BD+12 3422
Tycho2
Tycho2 1017-01625-1 Pflag RAmdeg 273.14871191 DEmdeg 12.39358934
PmRA 6.6 PmDE 3.1 E RAmdeg 5 E DEmdeg 5
E pmRA 1.0 E pmDE 1.0 EpRAm 1990.98 EpDEm 1991.03
Num 16 Q RAmdeg 1.4 Q DEmdeg 1.4 Q pmRA 1.3
Q pmDE 1.4 BTmag 7.932 E BTmag 0.016 VTmag 7.591
E VTmag 0.011 Prox 999 TYC T HIP 89235
CCDM AB RAdeg 273.14869639 DEdeg 12.39358222 EpRA 1990 1.57
EpDE 1990 1.52 E RAdeg 4.5 E DEdeg 4.6 Posflg P
Corr 0.1
SAO
SAO 103481 DelFlag RA1950 PmRA1950 0.0007
DE1950 PmDE1950 -0.015 Vmag 7.5 SpType F0
Double code Source 29 CatNum 6479 DM BD+12 3422
DMcomp BDsup HD 166976 M HD 0
GC RA1950rad 4.75722597 DE1950rad 0.21606362 PmRA2000 0.0008
PmDE2000 -0.015
Hipparcos
Catalog H HIP 89235 Proxy H RAhms 18 12 35.69
DEdms +12 23 36.9 Vmag 7.56 VarFlag R Vmag G
RAdeg 273.149 DEdeg 12.3936 AstroRef * Plx 4.12
CCDM 18126+1224 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 139 Rho 0.163 HD 166976 BD BD+12 3422
CD CP Dm number +12 3422 VIred 0.42
SpType F0 R SpType Coord arcsec 2000 181235.69+122336.9
Hipparcos 2
HIP 89235 Sn 55 So 3 Nc 2
RArad 4.7673440496 DErad 0.2163088439 Plx 4.42 PmRA 7.15
PmDE 3.41 E RArad 0.56 E DErad 0.55 E Plx 0.95
E pmRA 0.8 E pmDE 0.8 Hpmag 7.628 E Hpmag 0.0012
SHp 0.011 VA 0 BV 0.358 E BV 0.015
VI 0.42
CCDM
Ccdm 18126+1224 RComp Comp A Note1
Note2 Discov num DRAs -0.31 DDEs -23.0
R dRAs 82 Year Theta Rho
Obs 2 Vmag 8.0 Sp F0 PmNote *
PmRA 6 PmDE 2 Dm number +12 3422 Cat1 BD
Name2 +12 1915 Cat2 AGK2/3 HD 166976 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 89235
 
 
18126+1224 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 181235.69+122337.0 Mag 8.88 Spectral class A6V (white)
Calc delta mag 0.84 Calc coord yes
CCDM
Ccdm 18126+1224 RComp Comp B Note1
Note2 Discov num HDS DRAs -0.30 DDEs -23.2
R dRAs 82 Year 1991 Theta 139 Rho 0.2
Obs 1 Vmag 8.9 Sp PmNote *
PmRA 6 PmDE 2 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 89235