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Doubles in session


Current system
21255+0203
A 2289 AB


Nearby doubles
9' : 21251+0157
BAL1588

30' : 21276+0204
J 2349

46' : 21256+0248
J 1039

49' : 21242+0248
J 914

51' : 21234+0123
BAL1228

56' : 21218+0202
STF2787AB

57' : 21286+0237
BAL2054

68' : 21279+0105
BAL1230

70' : 21260+0312
BAL2053

70' : 21210+0217
HEI 408AB

71' : 21257+0051
GRV 464

76' : 21276+0054
BAL1229

80' : 21214+0253
STT 435

83' : 21242+0323
BAL2052

84' : 21199+0158
KPP 763

87' : 21243+0327
BAL2561

88' : 21251+0330
FMR 163

88' : 21311+0226
BAL1590

88' : 21211+0104
BAL1227

89' : 21242+0036
ITF 219

90' : 21278-0040
SLW9009

93' : 21315+0140
HJ 3031

93' : 21237+0034
A 886

95' : 21209+0307
BU 838

95' : 21267+0335
VOU 41

97' : 21310+0111
UC 4482



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.

21255+0203 A 2289 AB

 
 
21h 25m 30.78s +02° 02' 35.0" P.A. 334.00 sep 0.1 mag 7.82,9.27 Sp A1III dist. 296.74 pc (967.97 l.y.)
 
 
Coord 2000 21255+0203 Discov num A  2289 Comp AB Coord arcsec 2000 21 25 30.78 +02 02 35.0
Date first 1910 Date last 2017 Obs 18
Pa first 304 Pa last 333.8 P.A. Now (θ) 327.4°
Sep first 0.3 Sep last 0.103 Sep. Now (ρ) 0.151"
Mag pri 7.82 Mag sec 9.27 delta mag (ΔM) 1.45 Spectral class A1III (white)
Pri motion ra +007 Sec motion ra
Pri motion dec -019 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
21255+0203 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 126787 21 25 31 +02 02 35 A 2289 AB 2017 18 334 0.1 7.82 9.27 1.45 Y <===
Show HD 203993 126787 21 25 31 +02 02 35 STT 439 AB,C 2018 22 222 14.6 7.53 11.33 3.80
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Aquarius SAO 126787 HIP 105792 Tycho2 0533-01002-1
Gaia DR2 2691752864506307456 HD 203993 ADS 14960 BD BD+01 4477
Distance 296.74 Distance ly 967.97
 
 
ORBITAL ELEMENTS
 
 
Period (P)159.45y± 21.43 Periastron (T)2008.15y± 1.85 Semi-major axis (a)0.207a± 0.013
Eccentricity (e)0.652± 0.025 Inclination (i)111°± 3.1 Longitude of periastron (ω)51.1°± 7.1
Node (Ω)141.1°± 4.2 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 154.0 0.096
2001 151.1 0.095
2002 148.1 0.093
2003 145.0 0.090
2004 141.5 0.085
2005 137.6 0.079
2006 133.0 0.071
2007 127.0 0.062
2008 118.7 0.051
2009 105.9 0.040
2010 84.8 0.031
2011 53.7 0.028
2012 24.3 0.033
2013 5.4 0.043
2014 354.2 0.055
2015 347.1 0.067
2016 342.2 0.079
2017 338.6 0.091
2018 335.8 0.103
2019 333.5 0.113
2020 331.6 0.124
2021 330.0 0.133
2022 328.6 0.142
2023 327.4 0.151
2024 326.3 0.159
2025 325.3 0.167
2026 324.4 0.174
2027 323.6 0.181
2028 322.8 0.187
2029 322.1 0.193
2030 321.4 0.199


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


 
  


wds21255%2B0203b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21255+0203 A 2289 AB : NOTES
 
 
discov_num notes refcode
A 2289 Little observed in recent years despite considerable orbital motion.
 
 
REFERENCES
 
 
refcode metd author reference
Tok2015c orb+j Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. 2015AJ....150...50T
Tok2015c +St AJ 150, 50, 2015 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
DISCOVERER
 
 
idgroup discov author
1 A Aitken, R.G.
312 STT Struve, O.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21255+0203 A 2289 AB 1996 13 345 0.1 7.82 9.27 A1III NOD 212530.78+020235.0
21255+0203 A 2289 AB 2008 14 282 0.0 7.82 9.27 A1III NOD 212530.78+020235.0
21255+0203 A 2289 AB 2014 17 174 0.1 7.82 9.27 A1III NO 212530.78+020235.0
21255+0203 A 2289 AB 2017 18 334 0.1 7.82 9.27 A1III NO 212530.78+020235.0

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

 
 
WDS 21255+0203 A 2289 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21255+0203 A 2289 AB : MEASURES
 
 
No records found.

 
 
WDS 21255+0203 : VIRTUAL EYEPIECE
 
 

21255+0203 A 2289A mag 7.82 Sp A1III 21255+0203 A 2289B sep 0.1 P.A. 333.80 mag 9.27 21255+0203 STT 439C sep 14.6 P.A. 221.90 mag 11.33 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 21255+0203 : ALADIN DSS IMAGE @ 21h 25m 30.78s +02° 02' 35.0"
 
 
 
 
WDS 21255+0203 A 2289 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21255+0203 A 2289AB distance=0' 21251+0157 BAL1588 distance=9' 21276+0204 J 2349 distance=30' 21256+0248 J 1039 distance=46' 21242+0248 J 914 distance=49' 21234+0123 BAL1228 distance=51' 21218+0202 STF2787AB distance=56' 21218+0202 STF2787AC distance=56' 21286+0237 BAL2054 distance=57' 21279+0105 BAL1230 distance=68' 21210+0217 HEI 408DE distance=69' 21260+0312 BAL2053 distance=70' 21210+0217 BAL1586Aa,Ab distance=70' 21210+0217 HEI 408AB distance=70' 21210+0217 HEI 408AC distance=70' 21210+0217 HEI 408AD distance=70' 21257+0051 GRV 464 distance=71' 21276+0054 BAL1229 distance=76' 21214+0253 STT 435 distance=80' 21242+0323 BAL2052 distance=83' 21199+0158 KPP 763 distance=84' 21243+0327 BAL2561 distance=87' 21251+0330 FMR 163 distance=88' 21311+0226 BAL1590 distance=88' 21211+0104 BAL1227 distance=88' 21242+0036 ITF 219 distance=89' 21278-0040 SLW9009 distance=90' 21315+0140 HJ 3031 distance=93' 21237+0034 A 886 distance=93' 21209+0307 BU 838 distance=95' 21267+0335 VOU 41 distance=95' 21310+0111 UC 4482 distance=97' 21315+0122 ITF 88 distance=99' 21243+0343 A 2288 distance=102' 21197+0256 CVR 893 distance=104' 21318+0116 BAL1231 distance=105' 21266+0347 TDT2969 distance=106' 21188+0245 BAL2051 distance=110' 21328+0159 A 2290 distance=110' 21185+0236 OSO 144 distance=110' 21182+0141 BAL1584 distance=112' 21189+0252 HEI 407 distance=113' 21261-0010 RST5164 distance=114' 21211+0336 NSN 5 distance=115' 21317+0312 J 1723 distance=118' 21330+0244 GWP3073 distance=120' 21210+0022 RST5162 distance=122' 21324-0059 SLW1241 distance=122' 21338+0147 BLZ 1 distance=126' 21225+0403 UC 4462 distance=130' 21198+0026 WAA 50 distance=130' 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 21255+0203 A 2289 AB 334 0.1
Show 21255+0203 STT 439 AB,C 222 14.6
Show 21251+0157 BAL1588 134 17.2 9
Show 21276+0204 J 2349 237 8.4 30
Show 21256+0248 J 1039 332 4.3 46
Show 21242+0248 J 914 1.8 49
Show 21234+0123 BAL1228 317 5.9 51
Show 21218+0202 STF2787 AB 20 22.6 56
Show 21218+0202 STF2787 AC 94 70.4 56
Show 21286+0237 BAL2054 121 18.1 57
Show 21279+0105 BAL1230 274 11.9 68
Show 21210+0217 HEI 408 DE 106 54.5 69
Show 21260+0312 BAL2053 93 19.9 70
Show 21210+0217 BAL1586 Aa,Ab 111 0.6 70
Show 21210+0217 HEI 408 AB 258 2.3 70
Show 21210+0217 HEI 408 AC 273 55.5 70
Show 21210+0217 HEI 408 AD 111 95.2 70
Show 21257+0051 GRV 464 300 26.1 71
Show 21276+0054 BAL1229 332 10.6 76
Show 21214+0253 STT 435 239 0.7 80
Show 21242+0323 BAL2052 256 16.9 83
Show 21199+0158 KPP 763 174 6.6 84
Show 21243+0327 BAL2561 288 20.5 87
Show 21251+0330 FMR 163 12 15.4 88
Show 21311+0226 BAL1590 285 2.7 88
Show 21211+0104 BAL1227 152 4.3 88
Show 21242+0036 ITF 219 270 2.6 89
Show 21278-0040 SLW9009 59 31.2 90
Show 21315+0140 HJ 3031 250 28.1 93
Show 21237+0034 A 886 349 4.8 93
Show 21209+0307 BU 838 156 1.6 95
Show 21267+0335 VOU 41 171 0.1 95
Show 21310+0111 UC 4482 122 55.1 97
Show 21315+0122 ITF 88 31 8.4 99
Show 21243+0343 A 2288 227 0.4 102
Show 21197+0256 CVR 893 85 21.0 104
Show 21318+0116 BAL1231 131 5.5 105
Show 21266+0347 TDT2969 155 0.5 106
Show 21188+0245 BAL2051 166 2.6 110
Show 21328+0159 A 2290 261 0.5 110
Show 21185+0236 OSO 144 346 16.8 110
Show 21182+0141 BAL1584 338 9.7 112
Show 21189+0252 HEI 407 62 0.2 113
Show 21261-0010 RST5164 306 0.9 114
Show 21211+0336 NSN 5 65 7.5 115
Show 21317+0312 J 1723 121 2.4 118
Show 21330+0244 GWP3073 326 37.1 120
Show 21210+0022 RST5162 21 0.4 122
Show 21324-0059 SLW1241 129 11.7 122
Show 21338+0147 BLZ 1 3 5.2 126
Show 21225+0403 UC 4462 71 29.2 130

 
 
WDS 21255+0203 : COMPONENTS
 
 
  A B
B pa=333.8°
sep=0.10"
 
C pa=221.9°
sep=14.63"
pa=221.5°
sep=14.66"
 
 
21255+0203 A
 
 
Coord arcsec 2000 212530.78+020235.0 Mag 7.82 Spectral class A1III (white) PmRA 7.00
PmDE -19.0 SAO 126787 HIP 105792 Tycho2 0533-01002-1
HD 203993 BD BD+01 4477
Tycho2
Tycho2 0533-01002-1 Pflag RAmdeg 321.37825142 DEmdeg 2.04301319
PmRA 7.2 PmDE -18.9 E RAmdeg 5 E DEmdeg 6
E pmRA 1.0 E pmDE 1.0 EpRAm 1990.96 EpDEm 1990.75
Num 13 Q RAmdeg 1.4 Q DEmdeg 1.0 Q pmRA 1.4
Q pmDE 1.1 BTmag 7.544 E BTmag 0.016 VTmag 7.533
E VTmag 0.012 Prox 154 TYC T HIP 105792
CCDM AB RAdeg 321.37823500 DEdeg 2.04305694 EpRA 1990 1.63
EpDE 1990 1.67 E RAdeg 4.8 E DEdeg 5.5 Posflg P
Corr 0.0
SAO
SAO 126787 DelFlag RA1950 PmRA1950 0.0007
DE1950 PmDE1950 -0.021 Vmag 8.1 SpType A0
Double code Source 30 CatNum 7502 DM BD+01 4477
DMcomp BDsup HD 203993 M HD 0
GC RA1950rad 5.59802772 DE1950rad 0.03188068 PmRA2000 0.0009
PmDE2000 -0.025
Hipparcos
Catalog H HIP 105792 Proxy H RAhms 21 25 30.78
DEdms +02 02 35.0 Vmag 7.53 VarFlag R Vmag H
RAdeg 321.378 DEdeg 2.04306 AstroRef * Plx 5.36
CCDM 21255+0203 N CCDM I Nsys 1 Ncomp 3
MultFlag C Source Qual C M HIP
Theta Rho HD 203993 BD BD+01 4477
CD CP Dm number +01 4477 VIred 0.04
SpType A0 R SpType Coord arcsec 2000 212530.78+020235.0
Hipparcos 2
HIP 105792 Sn 55 So 3 Nc 3
RArad 5.6091083037 DErad 0.0356580994 Plx 3.37 PmRA 7.41
PmDE -20.84 E RArad 0.74 E DErad 0.57 E Plx 0.94
E pmRA 1.1 E pmDE 0.59 Hpmag 7.5445 E Hpmag 0.0021
SHp 0.014 VA 0 BV 0.01 E BV 0.4
VI 0.04
CCDM
Ccdm 21255+0203 RComp Comp A Note1
Note2 Discov num DRAs 0.84 DDEs -26.2
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.3 Sp A0 PmNote *
PmRA 31 PmDE -34 Dm number +01 4477 Cat1 BD
Name2 +01 2599 Cat2 AGK2/3 HD 203993 M HD
ADS BDS A14960 M ADS BDS N IDS IDS 21204N0137A
HIC 105792
 
 
21255+0203 B
 
 
Coord arcsec 2000 212530.78+020235.1 Mag 9.27 Calc delta mag 1.45 Calc coord yes
CCDM
Ccdm 21255+0203 RComp Comp B Note1
Note2 Discov num A 2289 DRAs DDEs
R dRAs Year 1958 Theta 273 Rho 0.1
Obs 9 Vmag 9.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14960 M ADS BDS N IDS IDS 21204N0137B
HIC 105792
 
 
21255+0203 C
 
 
Coord arcsec 2000 212530.13+020224.1 Mag 11.33 PmRA 3.00 PmDE -15.0
Calc delta mag 3.51 Calc coord yes
CCDM
Ccdm 21255+0203 RComp Comp C Note1
Note2 Discov num STT 439 DRAs DDEs
R dRAs Year 1850 Theta 221 Rho 15.5
Obs 9 Vmag 11.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14960 M ADS BDS N IDS IDS 21204N0137C
HIC