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Doubles in session


Current system
04215-2055
B 1935 AB


Nearby doubles
29' : 04205-2120
B 2570

38' : 04188-2048
KPP2347

50' : 04233-2138
B 2571

52' : 04218-2146
TOK 244

60' : 04252-2126
TDS2844

73' : 04177-2006
BRT 301

76' : 04161-2059
KPP1099

77' : 04161-2112
B 1934

85' : 04229-2216
ARA1619

89' : 04161-2140
ARA1268

89' : 04167-2153
NSC 19

91' : 04273-2135
TDS2855

96' : 04208-1920
SEE 36

97' : 04279-2130
BU 184

99' : 04187-1924
B 687

101' : 04226-1916
B 1936

102' : 04153-2004
BRT 300

104' : 04141-2105
DON 63

110' : 04289-2129
HTS 5

119' : 04299-2046
KPP3571

122' : 04130-2119
KPP2617

128' : 04129-2013
GWP 562

129' : 04240-2259
ARA1982

134' : 04120-2114
UC 1130

135' : 04121-2029
TDS2784

137' : 04312-2113
UC 1176



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.

04215-2055 B 1935 AB

 
 
04h 21m 28.80s -20° 54' 54.2" P.A. 5.00 sep 0.1 mag 8.91,10.15 Sp K1V dist. 38.55 pc (125.75 l.y.)
 
 
Coord 2000 04215-2055 Discov num B  1935 Comp AB Coord arcsec 2000 04 21 28.80 -20 54 54.2
Date first 1930 Date last 2021 Obs 17
Pa first 88 Pa last 5.2 P.A. Now (θ) 309.2°
Sep first 0.3 Sep last 0.149 Sep. Now (ρ) 0.109"
Mag pri 8.91 Mag sec 10.15 delta mag (ΔM) 1.24 Spectral class K1V (yellow-orange)
Pri motion ra +193 Sec motion ra
Pri motion dec +142 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
04215-2055 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 169366 04 21 29 -20 54 54 B 1935 AB 2021 17 5 0.1 8.91 10.15 1.24 Y <===
Show HD 27701 169366 04 21 29 -20 54 54 LDS 9168 AC 2015 10 326 59.3 8.91 11.29 2.38
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Eridanus SAO 169366 HIP 20342 Tycho2 5896-01671-1
Gaia DR2 5091491594047857664 HD 27701 BD BD-21 848 Distance 38.55
Distance ly 125.75
 
 
ORBITAL ELEMENTS
 
 
Period (P)21.22y± 0.19 Periastron (T)2002.16y± 0.22 Semi-major axis (a)0.234a± 0.006
Eccentricity (e)0.505± 0.028 Inclination (i)155.2°± 4.8 Longitude of periastron (ω)310.9°± 20
Node (Ω)239.5°± 19.1 Notesn ReferenceTok2014a
Equinox2000 Last observation2013 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 24.2 0.173
2001 351.2 0.128
2002 295.6 0.109
2003 241.8 0.129
2004 206.8 0.161
2005 183.4 0.192
2006 166.3 0.222
2007 153.1 0.248
2008 142.4 0.272
2009 133.2 0.292
2010 125.1 0.308
2011 117.8 0.321
2012 110.9 0.330
2013 104.3 0.335
2014 97.9 0.335
2015 91.3 0.331
2016 84.5 0.322
2017 77.2 0.307
2018 69.0 0.287
2019 59.2 0.260
2020 46.8 0.225
2021 29.3 0.183
2022 0.3 0.137
2023 309.2 0.109
2024 251.9 0.123
2025 213.3 0.154
2026 187.9 0.186
2027 169.7 0.215
2028 155.8 0.243
2029 144.6 0.267
2030 135.1 0.288


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


 
  


wds04215-2055a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 04215-2055 B 1935 AB : NOTES
 
 
discov_num notes refcode
LDS9168 Old LDS6168.
AC: NLTT 13102/13095 Chm2004
AC: SHY 167. Bayesian analysis by Shaya & Olling (2011) indicates very Shy2011
high (near 100%) probability pair is physical.
 
 
REFERENCES
 
 
refcode metd author reference
Chm2004 E - Chaname, J. & Gould, A. 2004ApJ...601..289C
Chm2004 ApJ 601, 289, 2004
Chm2004 (Photometry, coordinates, and astrometry from rNLTT. Astrometry from early
Chm2004 versions of 2MASS and UCAC, with date given only as "circa 2000". Measures
Chm2004 identical to discovery observations - predominantly close pairs - were assumed
Chm2004 not new observations, so not included in WDS. Similar concerns when primary and
Chm2004 secondary magnitudes or proper motions were the same.)
Shy2011 - Shaya, E.J. & Olling, R. 2011ApJS..192....2S
Shy2011 ApJS 192, 2, 2011
Shy2011 (Statistical analysis of probability that wide Hipparcos pairs are physical. Pairs
Shy2011 added to WDS only if probability 90% or greater.)
Tok2014a orb j Tokovinin, A., Mason, B.D., & Hartkopf, W.I. 2014AJ....147..123T
Tok2014a +St AJ 147, 123, 2014 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
DISCOVERER
 
 
idgroup discov author
1 B van den Bos, W.H.
212 LDS Luyten p.m. catalog (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
04215-2055 B 1935 AB 1991 3 107 0.3 8.78 10.46 K1V D 042128.80-205454.2
04215-2055 B 1935 AB 2008 4 135 0.3 8.78 10.46 K1V D 042128.80-205454.2
04215-2055 B 1935 AB 2011 6 118 0.3 8.91 10.15 K1V N D 042128.80-205454.2
04215-2055 B 1935 AB 2013 8 100 0.3 8.91 10.15 K1V NO 042128.80-205454.2
04215-2055 B 1935 AB 2014 10 92 0.3 8.91 10.15 K1V NO 042128.80-205454.2
04215-2055 B 1935 AB 2015 11 86 0.3 8.91 10.15 K1V NO 042128.80-205454.2
04215-2055 B 1935 AB 2016 12 76 0.3 8.91 10.15 K1V NO 042128.80-205454.2
04215-2055 B 1935 AB 2018 13 67 0.3 8.91 10.15 K1V NO 042128.80-205454.2
04215-2055 B 1935 AB 2019 14 50 0.2 8.91 10.15 K1V NO 042128.80-205454.2
04215-2055 B 1935 AB 2020 16 30 0.2 8.91 10.15 K1V NO 042128.80-205454.2
04215-2055 B 1935 AB 2021 17 5 0.1 8.91 10.15 K1V NO 042128.80-205454.2

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

 
 
WDS 04215-2055 B 1935 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 04215-2055 B 1935 AB : MEASURES
 
 
No records found.

 
 
WDS 04215-2055 : VIRTUAL EYEPIECE
 
 

04215-2055 B 1935A mag 8.91 Sp K1V 04215-2055 B 1935B sep 0.1 P.A. 4.90 mag 10.15 04215-2055 LDS9168C sep 58.1 P.A. 327.40 mag 11.29 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 04215-2055 : ALADIN DSS IMAGE @ 04h 21m 28.80s -20° 54' 54.2"
 
 
 
 
WDS 04215-2055 B 1935 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

04215-2055 B 1935AB distance=0' 04205-2120 B 2570 distance=29' 04188-2048 KPP2347 distance=38' 04233-2138 B 2571 distance=50' 04218-2146 TOK 244 distance=52' 04252-2126 TDS2844 distance=60' 04177-2006 BRT 301 distance=73' 04161-2059 KPP1099 distance=76' 04161-2112 B 1934 distance=77' 04229-2216 ARA1619 distance=85' 04161-2140 ARA1268 distance=89' 04167-2153 NSC 19 distance=89' 04273-2135 TDS2855 distance=91' 04208-1920 SEE 36 distance=96' 04279-2130 BU 184 distance=97' 04187-1924 B 687 distance=99' 04226-1916 B 1936 distance=101' 04153-2004 BRT 300 distance=102' 04141-2105 DON 63 distance=104' 04289-2129 HTS 5 distance=110' 04299-2046 KPP3571 distance=119' 04130-2119 KPP2617 distance=122' 04129-2013 GWP 562 distance=128' 04240-2259 ARA1982 distance=129' 04120-2114 UC 1130 distance=134' 04121-2029 TDS2784 distance=135' 04312-2113 UC 1176 distance=137' 04153-1909 RST2337 distance=138' 04247-2305 B 2572 distance=138' 04116-2021 SRT 2 distance=143' 04274-1855 STN 7 distance=148' 04325-2119 DON 69 distance=157' 04121-1926 B 686 distance=159' 04275-2312 B 67 distance=162' 04188-2332 BRT1375 distance=162' 04333-2054 SKF2470 distance=166' 04333-2108 LDS 122 distance=166' 04122-1911 KPP2462 distance=168' 04332-2127 TDS2893 distance=168' 04096-2103 DON 61 distance=168' 04320-1936 UC 1178 distance=169' 04128-2251 LDS3563 distance=169' 04207-1806 ARA 324 distance=170' 04298-1403 SKF2469 distance=171' 04218-1804 ARA 325 distance=172' 04240-1805 HJ 3647BC distance=174' 04093-2025 RST2333AB distance=174' 04093-2025 SKF2465AB,C distance=174' 04240-1805 HJ 3647AB distance=174' 04240-1805 HJ 3647AC distance=174' 04131-2308 HU 30 distance=178' 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 04215-2055 B 1935 AB 5 0.1
Show 04215-2055 LDS9168 AC 326 59.3
Show 04205-2120 B 2570 51 7.5 29
Show 04188-2048 KPP2347 200 20.1 38
Show 04233-2138 B 2571 309 5.4 50
Show 04218-2146 TOK 244 187 76.3 52
Show 04252-2126 TDS2844 244 0.5 60
Show 04177-2006 BRT 301 211 4.1 73
Show 04161-2059 KPP1099 221 8.7 76
Show 04161-2112 B 1934 43 0.2 77
Show 04229-2216 ARA1619 242 12.0 85
Show 04161-2140 ARA1268 252 14.2 89
Show 04167-2153 NSC 19 306 8.4 89
Show 04273-2135 TDS2855 300 0.6 91
Show 04208-1920 SEE 36 342 8.0 96
Show 04279-2130 BU 184 248 1.9 97
Show 04187-1924 B 687 252 0.4 99
Show 04226-1916 B 1936 72 2.6 101
Show 04153-2004 BRT 300 292 4.3 102
Show 04141-2105 DON 63 345 0.9 104
Show 04289-2129 HTS 5 30 17.4 110
Show 04299-2046 KPP3571 295 1.7 119
Show 04130-2119 KPP2617 47 24.1 122
Show 04129-2013 GWP 562 115 162.8 128
Show 04240-2259 ARA1982 353 6.5 129
Show 04120-2114 UC 1130 249 26.3 134
Show 04121-2029 TDS2784 135 0.4 135
Show 04312-2113 UC 1176 242 66.0 137
Show 04153-1909 RST2337 315 0.8 138
Show 04247-2305 B 2572 337 6.1 138
Show 04116-2021 SRT 2 334 61.8 143
Show 04274-1855 STN 7 185 4.8 148
Show 04325-2119 DON 69 128 2.4 157
Show 04121-1926 B 686 144 1.7 159
Show 04275-2312 B 67 255 0.9 162
Show 04188-2332 BRT1375 116 5.3 162
Show 04333-2054 SKF2470 88 6.0 166
Show 04333-2108 LDS 122 194 249.3 166
Show 04122-1911 KPP2462 17 21.9 168
Show 04332-2127 TDS2893 290 0.8 168
Show 04096-2103 DON 61 183 0.8 168
Show 04320-1936 UC 1178 185 9.1 169
Show 04128-2251 LDS3563 333 15.7 169
Show 04207-1806 ARA 324 102 6.6 170
Show 04298-1403 SKF2469 243 35.7 171
Show 04218-1804 ARA 325 34 6.9 172
Show 04240-1805 HJ 3647 BC 2 36.6 174
Show 04093-2025 RST2333 AB 189 0.4 174
Show 04093-2025 SKF2465 AB,C 191 42.2 174
Show 04240-1805 HJ 3647 AB 259 29.8 174
Show 04240-1805 HJ 3647 AC 317 41.8 174

 
 
WDS 04215-2055 : COMPONENTS
 
 
  A B
B pa=4.9°
sep=0.15"
 
C pa=327.4°
sep=58.07"
pa=327.3°
sep=57.95"
 
 
04215-2055 A
 
 
Coord arcsec 2000 042128.80-205454.2 Mag 8.91 Spectral class K1V (yellow-orange) PmRA 193.00
PmDE 142.0 SAO 169366 HIP 20342 Tycho2 5896-01671-1
HD 27701 BD BD-21 848
Tycho2
Tycho2 5896-01671-1 Pflag RAmdeg 65.37001985 DEmdeg -20.91506946
PmRA 192.5 PmDE 141.6 E RAmdeg 10 E DEmdeg 10
E pmRA 1.6 E pmDE 1.4 EpRAm 1990.74 EpDEm 1990.18
Num 10 Q RAmdeg 1.6 Q DEmdeg 1.1 Q pmRA 1.6
Q pmDE 1.1 BTmag 9.985 E BTmag 0.023 VTmag 8.912
E VTmag 0.014 Prox 597 TYC T HIP 20342
CCDM AB RAdeg 65.36954750 DEdeg -20.91539861 EpRA 1990 1.77
EpDE 1990 1.66 E RAdeg 9.5 E DEdeg 9.8 Posflg P
Corr 0.3
SAO
SAO 169366 DelFlag RA1950 PmRA1950 0.0137
DE1950 PmDE1950 0.142 Vmag 8.7 SpType G5
Double code Source 23 CatNum 1327 DM BD-21 848
DMcomp BDsup HD 27701 M HD 0
GC RA1950rad 1.13138142 DE1950rad -0.36711928 PmRA2000 0.0141
PmDE2000 0.14
Hipparcos
Catalog H HIP 20342 Proxy H RAhms 04 21 28.68
DEdms -20 54 55.5 Vmag 8.78 VarFlag R Vmag G
RAdeg 65.3695 DEdeg -20.9154 AstroRef A Plx 27.46
CCDM 04215-2055 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 107 Rho 0.322 HD 27701 BD BD-21 848
CD CP Dm number -21 848 VIred 0.99
SpType K1V R SpType Coord arcsec 2000 042128.68-205455.5
Hipparcos 2
HIP 20342 Sn 15 So 3 Nc 2
RArad 1.1409129616 DErad -0.3650427766 Plx 25.94 PmRA 190.78
PmDE 131.11 E RArad 0.99 E DErad 0.78 E Plx 1.45
E pmRA 1.04 E pmDE 1.03 Hpmag 8.9149 E Hpmag 0.0018
SHp 0.021 VA 0 BV 0.939 E BV 0.003
VI 0.99
CCDM
Ccdm 04215-2055 RComp Comp A Note1
Note2 Discov num DRAs -1.14 DDEs 6.1
R dRAs 65 Year Theta Rho
Obs 3 Vmag 9.4 Sp G5 PmNote *
PmRA 191 PmDE 134 Dm number -21 848 Cat1 BD
Name2 169366 Cat2 SAO HD 27701 M HD
ADS BDS M ADS BDS N IDS IDS 04171S2109A
HIC 20342
 
 
04215-2055 B
 
 
Coord arcsec 2000 042128.80-205454.1 Mag 10.15 Calc delta mag 1.24 Calc coord yes
CCDM
Ccdm 04215-2055 RComp Comp B Note1
Note2 Discov num B 1935 DRAs DDEs
R dRAs Year 1930 Theta 088 Rho 0.3
Obs Vmag 10.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 04171S2109B
HIC 20342
 
 
04215-2055 C
 
 
Coord arcsec 2000 042126.57-205405.3 Mag 11.29 PmRA 197.00 PmDE 142.0
HIP 20338 Tycho2 5896-01514-1 Calc delta mag 2.38 Calc coord yes
Tycho2
Tycho2 5896-01514-1 Pflag RAmdeg 65.36005421 DEmdeg -20.90134819
PmRA 198.6 PmDE 148.3 E RAmdeg 78 E DEmdeg 79
E pmRA 2.8 E pmDE 2.9 EpRAm 1978.99 EpDEm 1979.79
Num 4 Q RAmdeg 0.4 Q DEmdeg 1.4 Q pmRA 0.4
Q pmDE 1.4 BTmag 12.634 E BTmag 0.215 VTmag 11.289
E VTmag 0.084 Prox 597 TYC T HIP 20338
CCDM RAdeg 65.35956694 DEdeg -20.90169167 EpRA 1990 1.75
EpDE 1990 1.67 E RAdeg 86.3 E DEdeg 85.9 Posflg
Corr 0.3
Hipparcos
Catalog H HIP 20338 Proxy RAhms 04 21 26.29
DEdms -20 54 06.6 Vmag 11.53 VarFlag 2 R Vmag H
RAdeg 65.3595 DEdeg -20.9018 AstroRef Plx 35.83
CCDM N CCDM Nsys Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD BD
CD CP Dm number VIred 0.75
SpType R SpType Coord arcsec 2000 042126.29-205406.6
Hipparcos 2
HIP 20338 Sn 5 So 0 Nc 1
RArad 1.140739167 DErad -0.3648056135 Plx 32.49 PmRA 196.24
PmDE 141.67 E RArad 2.22 E DErad 2.46 E Plx 4.06
E pmRA 2.38 E pmDE 2.95 Hpmag 11.6917 E Hpmag 0.0065
SHp 0.078 VA 0 BV 0.866 E BV 0.25
VI 0.88
CCDM
Ccdm 04215-2055 RComp Comp C Note1
Note2 Discov num LUY DRAs -3.57 DDEs 55.1
R dRAs 65 Year 1960 Theta 328 Rho 61.0
Obs 1 Vmag 9.9 Sp PmNote
PmRA 191 PmDE 134 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 04171S2109C
HIC 20338