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Doubles in session


Current system
04571-1338
A 2625
HD 31656


Nearby doubles
39' : 04554-1309
A 2623

44' : 04542-1347
GWP 629

54' : 05007-1330
STF 631

75' : 05016-1411
BRT1838

76' : 04540-1238
RST3405

81' : 04516-1325
SKF1384

83' : 05028-1340
A 2631

87' : 04517-1302
TDS2988

93' : 04508-1325
GWP 621

99' : 04516-1435
GAL 153

99' : 04539-1505
GWP 628

100' : 04503-1348
KPP1018

110' : 05039-1251
GWP 639

112' : 04497-1307
RST3403

112' : 05030-1226
BU 884

115' : 05039-1433
SKF2473

115' : 04556-1145
KPP1559

116' : 04493-1313
DAM 746

122' : 04510-1214
HJ 3693

126' : 04571-1123
BRT2640

130' : 05058-1404
TDS3061

130' : 05059-1355
A 3009

137' : 05005-1545
A 3008

143' : 05034-1153
GAL 160

143' : 05035-1151
KPP 118

151' : 04568-1608
HJ 3705



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.

04571-1338 A 2625 (HD 31656)

 
 
04h 57m 04.79s -13° 38' 02.6" P.A. 182.00 sep 0.1 mag 9.90,9.90 Sp F2V
 
 
Coord 2000 04571-1338 Discov num A  2625 Comp Coord arcsec 2000 04 57 04.79 -13 38 02.6
Date first 1913 Date last 2021 Obs 12
Pa first 359 Pa last 181.6 P.A. Now (θ) 198.4°
Sep first 0.3 Sep last 0.057 Sep. Now (ρ) 0.047"
Mag pri 9.90 Mag sec 9.90 delta mag (ΔM) 0 Spectral class F2V (yellow-white)
Pri motion ra -002 Sec motion ra
Pri motion dec -028 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 31656 Constellation Eridanus SAO 150016 Tycho2 5329-00117-1
Gaia DR2 2987535790325735168 HD 31656 ADS 3559
 
 
ORBITAL ELEMENTS
 
 
Period (P)178.2y± 42.5 Periastron (T)2022.16y± 1.02 Semi-major axis (a)0.177a± 0.014
Eccentricity (e)0.664± 0.029 Inclination (i)51°± 7.8 Longitude of periastron (ω)42.5°± 5.4
Node (Ω)157.8°± 14 Notes ReferenceTok2021c
Equinox2000 Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 78.5 0.103
2001 81.4 0.101
2002 84.4 0.098
2003 87.5 0.096
2004 90.8 0.094
2005 94.2 0.092
2006 97.8 0.091
2007 101.5 0.089
2008 105.3 0.087
2009 109.3 0.086
2010 113.4 0.084
2011 117.6 0.083
2012 122.0 0.082
2013 126.6 0.080
2014 131.3 0.078
2015 136.3 0.077
2016 141.5 0.075
2017 147.1 0.072
2018 153.0 0.069
2019 159.6 0.065
2020 167.1 0.061
2021 175.7 0.056
2022 185.9 0.051
2023 198.4 0.047
2024 213.2 0.043
2025 229.9 0.042
2026 246.7 0.043
2027 261.9 0.046
2028 274.3 0.052
2029 284.2 0.058
2030 291.9 0.066


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


 
  


wds04571-1338a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 04571-1338 A 2625 (HD 31656) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2021c orb - Tokovinin, A. 2021IAUDS.203....1S
Tok2021c Inf. Circ. 203, 1, 2021
 
 
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
04571-1338 A 2625 1978 7 222 0.2 9.90 9.90 F2V 045704.79-133802.6
04571-1338 A 2625 2018 9 158 0.1 9.90 9.90 F2V 045704.79-133802.6
04571-1338 A 2625 2019 10 167 0.1 9.90 9.90 F2V 045704.79-133802.6
04571-1338 A 2625 2020 11 173 0.1 9.90 9.90 F2V 045704.79-133802.6
04571-1338 A 2625 2021 12 182 0.1 9.90 9.90 F2V O 045704.79-133802.6

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

 
 
WDS 04571-1338 A 2625 (HD 31656) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 04571-1338 A 2625 (HD 31656) : MEASURES
 
 
No records found.

 
 
WDS 04571-1338 (HD 31656) : VIRTUAL EYEPIECE
 
 

04571-1338 A 2625A mag 9.9 Sp F2V 04571-1338 A 2625B sep 0.1 P.A. 181.60 mag 9.9 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 04571-1338 (HD 31656) : ALADIN DSS IMAGE @ 04h 57m 04.79s -13° 38' 02.6"
 
 
 
 
WDS 04571-1338 A 2625 (HD 31656) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

04571-1338 A 2625 distance=0' 04554-1309 A 2623 distance=39' 04542-1347 GWP 629 distance=44' 05007-1330 STF 631 distance=54' 05016-1411 BRT1838 distance=75' 04540-1238 RST3405 distance=76' 04516-1325 SKF1384 distance=81' 05028-1340 A 2631 distance=83' 04517-1302 TDS2988 distance=87' 04508-1325 GWP 621 distance=93' 04516-1435 GAL 153 distance=99' 04539-1505 GWP 628 distance=99' 04503-1348 KPP1018 distance=100' 05039-1251 GWP 639 distance=110' 04497-1307 RST3403 distance=112' 05030-1226 BU 884 distance=112' 05039-1433 SKF2473 distance=115' 04556-1145 KPP1559 distance=115' 04493-1313 DAM 746 distance=116' 04510-1214 HJ 3693 distance=122' 04571-1123 BRT2640 distance=126' 05058-1404 TDS3061 distance=130' 05059-1355 A 3009 distance=130' 05005-1545 A 3008 distance=137' 05034-1153 GAL 160 distance=143' 05035-1151 KPP 118 distance=143' 04568-1608 HJ 3705 distance=151' 05010-1112 A 2629 distance=157' 04599-1105 TDS3033 distance=159' 05058-1202 GWP 643 distance=160' 05074-1433 A 3011 distance=161' 04568-1057 HU 215 distance=162' 05058-1156 BRT2641 distance=164' 04562-1055 TDS3011 distance=164' 04501-1548 HDS 622 distance=165' 04466-1445 GWP 615 distance=167' 04590-1623 BU 314AB distance=167' 04590-1623 BU 314AB,C distance=167' 05015-1103 TDS3043 distance=169' 04486-1145 HJ 3690AB distance=169' 04486-1145 HJ 3690AC distance=169' 04553-1625 HDS 635 distance=169' 05000-1623 RST3409AB distance=171' 05000-1623 TDS3035AC distance=171' 05062-1526 HJ 3720 distance=171' 05006-1053 RST3411 distance=173' 05019-1617 HJ 3714 distance=174' 04521-1058 TSN 130 distance=176' 05089-1255 RST3413 distance=178' 04450-1411 GWP 613 distance=179' 04512-1058 RST3404AB distance=182' 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 04571-1338 A 2625 182 0.1
Show 04554-1309 A 2623 209 1.4 39
Show 04542-1347 GWP 629 215 207.1 44
Show 05007-1330 STF 631 107 5.8 54
Show 05016-1411 BRT1838 241 5.5 75
Show 04540-1238 RST3405 259 0.5 76
Show 04516-1325 SKF1384 180 70.5 81
Show 05028-1340 A 2631 190 4.2 83
Show 04517-1302 TDS2988 68 0.9 87
Show 04508-1325 GWP 621 84 66.5 93
Show 04516-1435 GAL 153 66 13.0 99
Show 04539-1505 GWP 628 98 385.0 99
Show 04503-1348 KPP1018 128 8.2 100
Show 05039-1251 GWP 639 40 81.6 110
Show 04497-1307 RST3403 11 2.1 112
Show 05030-1226 BU 884 12 0.6 112
Show 05039-1433 SKF2473 354 70.9 115
Show 04556-1145 KPP1559 92 11.8 115
Show 04493-1313 DAM 746 127 23.9 116
Show 04510-1214 HJ 3693 119 8.1 122
Show 04571-1123 BRT2640 51 4.7 126
Show 05058-1404 TDS3061 179 0.7 130
Show 05059-1355 A 3009 274 1.2 130
Show 05005-1545 A 3008 157 1.9 137
Show 05034-1153 GAL 160 85 4.8 143
Show 05035-1151 KPP 118 85 4.8 143
Show 04568-1608 HJ 3705 142 22.3 151
Show 05010-1112 A 2629 181 0.2 157
Show 04599-1105 TDS3033 119 0.8 159
Show 05058-1202 GWP 643 37 14.0 160
Show 05074-1433 A 3011 235 3.5 161
Show 04568-1057 HU 215 305 0.6 162
Show 05058-1156 BRT2641 78 3.6 164
Show 04562-1055 TDS3011 136 0.5 164
Show 04501-1548 HDS 622 168 1.1 165
Show 04466-1445 GWP 615 182 28.4 167
Show 04590-1623 BU 314 AB 316 0.7 167
Show 04590-1623 BU 314 AB,C 55 53.3 167
Show 05015-1103 TDS3043 142 1.2 169
Show 04486-1145 HJ 3690 AB 35 30.5 169
Show 04486-1145 HJ 3690 AC 197 31.8 169
Show 04553-1625 HDS 635 273 0.4 169
Show 05000-1623 RST3409 AB 14 0.2 171
Show 05000-1623 TDS3035 AC 103 0.5 171
Show 05062-1526 HJ 3720 157 29.8 171
Show 05006-1053 RST3411 173 0.5 173
Show 05019-1617 HJ 3714 280 8.7 174
Show 04521-1058 TSN 130 32 0.2 176
Show 05089-1255 RST3413 155 1.5 178
Show 04450-1411 GWP 613 48 10.7 179
Show 04512-1058 RST3404 AB 281 4.3 182

 
 
WDS 04571-1338 : COMPONENTS
 
 
  A
B pa=181.6°
sep=0.06"
 
 
04571-1338 A
 
 
Componente originario normalizzato AB Name HD 31656 Coord arcsec 2000 045704.79-133802.6 Mag 9.9
Spectral class F2V (yellow-white) PmRA -2.00 PmDE -28.0 SAO 150016
Tycho2 5329-00117-1 HD 31656 DM BD-13 1029
Tycho2
Tycho2 5329-00117-1 Pflag RAmdeg 74.26995888 DEmdeg -13.63405597
PmRA 2.9 PmDE -33.7 E RAmdeg 9 E DEmdeg 9
E pmRA 1.1 E pmDE 1.1 EpRAm 1990.35 EpDEm 1990.13
Num 10 Q RAmdeg 0.9 Q DEmdeg 0.6 Q pmRA 1.0
Q pmDE 0.5 BTmag 9.541 E BTmag 0.020 VTmag 9.149
E VTmag 0.016 Prox 999 TYC T HIP
CCDM RAdeg 74.26995083 DEdeg -13.63397694 EpRA 1990 1.73
EpDE 1990 1.59 E RAdeg 8.9 E DEdeg 9.4 Posflg
Corr -0.1
SAO
SAO 150016 DelFlag RA1950 PmRA1950 -0.0025
DE1950 PmDE1950 -0.031 Vmag 8.4 SpType F0
Double code Source 21 CatNum 1379 DM BD-13 1029
DMcomp BDsup HD 31656 M HD 0
GC RA1950rad 1.28620571 DE1950rad -0.23929259 PmRA2000 -0.002
PmDE2000 -0.03
CCDM
Ccdm 04571-1338 RComp Comp A Note1
Note2 Discov num DRAs -1.42 DDEs -2.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 10.1 Sp F0 PmNote *
PmRA -36 PmDE -31 Dm number -13 1029 Cat1 BD
Name2 150016 Cat2 SAO HD 31656 M HD
ADS BDS A 3559 M ADS BDS N IDS IDS 04525S1347A
HIC
 
 
04571-1338 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 045704.79-133802.7 Mag 9.9 Calc coord yes
CCDM
Ccdm 04571-1338 RComp Comp B Note1
Note2 Discov num A 2625 DRAs DDEs
R dRAs Year 1958 Theta 019 Rho 0.2
Obs 4 Vmag 10.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 3559 M ADS BDS N IDS IDS 04525S1347B
HIC