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Current system
03003-1118
A 2611
HD 18740


Nearby doubles
8' : 03002-1110
BRT2627

42' : 03018-1042
RST4219

51' : 03035-1059
BU 1174

60' : 03013-1020
A 2612

60' : 02564-1133
LDS5405

63' : 02594-1016
A 2610

65' : 02595-1014
RST4217

67' : 02580-1215
UC 913

68' : 03044-1150
KPP1261

79' : 02593-1234
A 2609

82' : 03025-1232
UC 932

84' : 03037-1225
RST3375

88' : 03059-1151
RST3377

89' : 02547-1147
UC 855

91' : 02553-1209
GWP 395

91' : 03036-1001
GWP 415

95' : 02557-1223
GAL 329

96' : 02573-1241
LDS5406

99' : 02571-1244
GWP 401

106' : 03044-0951
RST4221

106' : 02535-1151
GAL 79

107' : 03037-1251
LDS3450

113' : 02542-1225
GWP 387

114' : 02527-1105
GWP 384

114' : 02596-0925
A 455AB

118' : 02531-1212
GAL 327



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.

03003-1118 A 2611 (HD 18740)

 
 
03h 00m 20.37s -11° 17' 39.3" P.A. 263.00 sep 0.1 mag 9.70,9.70 Sp G5
 
 
Coord 2000 03003-1118 Discov num A  2611 Comp Coord arcsec 2000 03 00 20.37 -11 17 39.3
Date first 1913 Date last 2021 Obs 24
Pa first 0 Pa last 262.9 P.A. Now (θ) 272.5°
Sep first 0.2 Sep last 0.107 Sep. Now (ρ) 0.095"
Mag pri 9.70 Mag sec 9.70 delta mag (ΔM) 0 Spectral class G5 (yellow)
Pri motion ra +026 Sec motion ra
Pri motion dec -043 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 18740 Constellation Eridanus SAO 148713 Tycho2 5290-00699-1
Gaia DR2 5160670391765154688 HD 18740 ADS 2283
 
 
ORBITAL ELEMENTS
 
 
Period (P)75.28y Periastron (T)1954.11y Semi-major axis (a)0.14a
Eccentricity (e)0.577 Inclination (i)23.4° Longitude of periastron (ω)316.5°
Node (Ω)53.3° Notes ReferenceTok2017c
Equinox2000 Last observation2017 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 205.2 0.209
2001 206.8 0.207
2002 208.4 0.205
2003 210.1 0.203
2004 211.8 0.201
2005 213.6 0.198
2006 215.4 0.196
2007 217.3 0.192
2008 219.2 0.189
2009 221.2 0.185
2010 223.3 0.181
2011 225.5 0.177
2012 227.8 0.172
2013 230.3 0.167
2014 232.9 0.162
2015 235.7 0.156
2016 238.7 0.150
2017 242.0 0.143
2018 245.6 0.136
2019 249.6 0.128
2020 254.1 0.121
2021 259.3 0.112
2022 265.3 0.104
2023 272.5 0.095
2024 281.1 0.086
2025 291.8 0.077
2026 305.2 0.069
2027 321.9 0.062
2028 341.9 0.057
2029 3.7 0.056
2030 25.1 0.059


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


 
  


wds03003-1118e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 03003-1118 A 2611 (HD 18740) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2017c orb - Tokovinin, A. 2017IAUDS.193....1T
Tok2017c Inf. Circ. 193, 1, 2017
 
 
DISCOVERER
 
 
idgroup discov author
1 A Aitken, R.G.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
03003-1118 A 2611 2007 17 39 0.2 9.70 9.70 G5 NOD 030020.37-111739.3
03003-1118 A 2611 2008 18 40 0.2 9.70 9.70 G5 NOD 030020.37-111739.3
03003-1118 A 2611 2011 19 45 0.2 9.70 9.70 G5 NOD 030020.37-111739.3
03003-1118 A 2611 2014 20 56 0.2 9.70 9.70 G5 O 030020.37-111739.3
03003-1118 A 2611 2015 21 237 0.2 9.70 9.70 G5 O 030020.37-111739.3
03003-1118 A 2611 2017 22 245 0.1 9.70 9.70 G5 O 030020.37-111739.3
03003-1118 A 2611 2018 23 249 0.1 9.70 9.70 G5 O 030020.37-111739.3
03003-1118 A 2611 2021 24 263 0.1 9.70 9.70 G5 O 030020.37-111739.3

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

 
 
WDS 03003-1118 A 2611 (HD 18740) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 03003-1118 A 2611 (HD 18740) : MEASURES
 
 
No records found.

 
 
WDS 03003-1118 (HD 18740) : VIRTUAL EYEPIECE
 
 

03003-1118 A 2611A mag 9.7 Sp G5 03003-1118 A 2611B sep 0.1 P.A. 262.80 mag 9.7 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 03003-1118 (HD 18740) : ALADIN DSS IMAGE @ 03h 00m 20.37s -11° 17' 39.3"
 
 
 
 
WDS 03003-1118 A 2611 (HD 18740) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

03003-1118 A 2611 distance=0' 03002-1110 BRT2627 distance=8' 03018-1042 RST4219 distance=42' 03035-1059 BU 1174 distance=51' 03013-1020 A 2612 distance=60' 02564-1133 LDS5405 distance=60' 02594-1016 A 2610 distance=63' 02595-1014 RST4217 distance=65' 02580-1215 UC 913 distance=67' 03044-1150 KPP1261 distance=68' 02593-1234 A 2609 distance=79' 03025-1232 UC 932 distance=82' 03037-1225 RST3375 distance=84' 03059-1151 RST3377 distance=88' 02547-1147 UC 855 distance=89' 02553-1209 GWP 395 distance=91' 03036-1001 GWP 415 distance=91' 02557-1223 GAL 329 distance=95' 02573-1241 LDS5406 distance=96' 02571-1244 GWP 401 distance=99' 03044-0951 RST4221 distance=106' 02535-1151 GAL 79 distance=106' 03037-1251 LDS3450 distance=107' 02542-1225 GWP 387 distance=113' 02527-1105 GWP 384 distance=114' 02596-0925 A 455AB distance=114' 02596-0925 HJ 3545AC distance=114' 02531-1212 GAL 327 distance=118' 02570-0930 KPP1263 distance=119' 03063-1243 LDS3452 distance=122' 02598-0913 JNN 22 distance=125' 02532-1007 GWP 385 distance=126' 03001-0908 RST4218 distance=130' 03083-1236 STF 357 distance=141' 02525-1246 LWR 4 distance=145' 02544-0922 UC 850 distance=146' 02575-1340 UC 907 distance=149' 03042-1335 RST3376 distance=149' 02508-1212 UC 826 distance=150' 03088-0952 GWP 427 distance=151' 03038-1340 CVR1735 distance=152' 03067-1319 STF 356 distance=154' 03061-1326 BU 527AB distance=154' 03061-1326 FOX9022AC distance=154' 03109-1108 ENG 12AB distance=156' 03109-1108 BUP 39BC distance=158' 03053-0857 A 456 distance=159' 03098-1238 GWP 428 distance=161' 02548-0853 NSC 17 distance=167' 02526-0914 NSN 248 distance=169' 02493-1033 STF 315 distance=169' 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 03003-1118 A 2611 263 0.1
Show 03002-1110 BRT2627 247 12.1 8
Show 03018-1042 RST4219 137 1.0 42
Show 03035-1059 BU 1174 221 0.6 51
Show 03013-1020 A 2612 148 2.5 60
Show 02564-1133 LDS5405 220 11.7 60
Show 02594-1016 A 2610 8 0.4 63
Show 02595-1014 RST4217 292 0.4 65
Show 02580-1215 UC 913 256 10.8 67
Show 03044-1150 KPP1261 318 9.7 68
Show 02593-1234 A 2609 348 0.6 79
Show 03025-1232 UC 932 205 10.2 82
Show 03037-1225 RST3375 215 1.7 84
Show 03059-1151 RST3377 113 2.6 88
Show 02547-1147 UC 855 277 25.6 89
Show 02553-1209 GWP 395 254 21.9 91
Show 03036-1001 GWP 415 221 5.7 91
Show 02557-1223 GAL 329 204 28.5 95
Show 02573-1241 LDS5406 295 286.0 96
Show 02571-1244 GWP 401 17 8.9 99
Show 03044-0951 RST4221 53 0.7 106
Show 02535-1151 GAL 79 354 5.7 106
Show 03037-1251 LDS3450 294 114.3 107
Show 02542-1225 GWP 387 346 11.7 113
Show 02527-1105 GWP 384 222 43.9 114
Show 02596-0925 A 455 AB 315 3.4 114
Show 02596-0925 HJ 3545 AC 68 44.2 114
Show 02531-1212 GAL 327 332 11.2 118
Show 02570-0930 KPP1263 151 9.7 119
Show 03063-1243 LDS3452 270 100.4 122
Show 02598-0913 JNN 22 321 0.6 125
Show 02532-1007 GWP 385 22 31.6 126
Show 03001-0908 RST4218 209 2.3 130
Show 03083-1236 STF 357 295 8.6 141
Show 02525-1246 LWR 4 295 15.4 145
Show 02544-0922 UC 850 109 38.7 146
Show 02575-1340 UC 907 277 65.1 149
Show 03042-1335 RST3376 146 1.2 149
Show 02508-1212 UC 826 163 28.9 150
Show 03088-0952 GWP 427 105 466.5 151
Show 03038-1340 CVR1735 249 131.0 152
Show 03067-1319 STF 356 13 15.5 154
Show 03061-1326 BU 527 AB 99 1.4 154
Show 03061-1326 FOX9022 AC 322 59.2 154
Show 03109-1108 ENG 12 AB 50 143.3 156
Show 03109-1108 BUP 39 BC 157 88.1 158
Show 03053-0857 A 456 45 4.7 159
Show 03098-1238 GWP 428 331 11.1 161
Show 02548-0853 NSC 17 15 6.1 167
Show 02526-0914 NSN 248 206 4.4 169
Show 02493-1033 STF 315 166 1.2 169

 
 
WDS 03003-1118 : COMPONENTS
 
 
  A
B pa=262.8°
sep=0.10"
 
 
03003-1118 A
 
 
Componente originario normalizzato AB Name HD 18740 Coord arcsec 2000 030020.37-111739.3 Mag 9.7
Spectral class G5 (yellow) PmRA 26.00 PmDE -43.0 SAO 148713
Tycho2 5290-00699-1 HD 18740 DM BD-11 571
Tycho2
Tycho2 5290-00699-1 Pflag RAmdeg 45.08487199 DEmdeg -11.29426696
PmRA 30.4 PmDE -39.6 E RAmdeg 9 E DEmdeg 10
E pmRA 1.3 E pmDE 1.3 EpRAm 1990.59 EpDEm 1990.31
Num 6 Q RAmdeg 0.7 Q DEmdeg 0.3 Q pmRA 0.6
Q pmDE 0.3 BTmag 9.676 E BTmag 0.023 VTmag 8.786
E VTmag 0.015 Prox 999 TYC T HIP
CCDM RAdeg 45.08480111 DEdeg -11.29417694 EpRA 1990 1.80
EpDE 1990 1.82 E RAdeg 9.2 E DEdeg 9.9 Posflg
Corr -0.3
SAO
SAO 148713 DelFlag RA1950 PmRA1950 0.0002
DE1950 PmDE1950 -0.034 Vmag 8.6 SpType G5
Double code Source 20 CatNum 680 DM BD-11 571
DMcomp BDsup HD 18740 M HD 0
GC RA1950rad 0.77637887 DE1950rad -0.20056057 PmRA2000 0.0006
PmDE2000 -0.036
CCDM
Ccdm 03003-1118 RComp Comp A Note1
Note2 Discov num DRAs 2.27 DDEs 21.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.7 Sp G5 PmNote *
PmRA 3 PmDE -34 Dm number -11 571 Cat1 BD
Name2 148713 Cat2 SAO HD 18740 M HD
ADS BDS A 2283 M ADS BDS N IDS IDS 02555S1141A
HIC
 
 
03003-1118 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 030020.36-111739.3 Mag 9.7 Calc coord yes
CCDM
Ccdm 03003-1118 RComp Comp B Note1 *
Note2 Discov num A 2611 DRAs DDEs
R dRAs Year 1945 Theta 164 Rho 0.2
Obs 12 Vmag 9.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 2283 M ADS BDS N N IDS IDS 02555S1141B
HIC