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Current system
21551-3148
I 1449
HD 208166


Nearby doubles
32' : 21567-3123
B 1014

38' : 21538-3114
LDS5934

40' : 21581-3150
LDS5939

40' : 21530-3119
RST2188

45' : 21583-3207
RST2190

47' : 21528-3112
LDS5932

52' : 21575-3105
PRO 234

54' : 21560-3055
HJ 5307AB

55' : 21509-3151
LDS4915

63' : 21589-3227
LDS4929

64' : 21553-3045
HJ 5304

67' : 21593-3110
BRT3104

86' : 21590-3258
UC 4620

86' : 21558-3313
TSN 200

94' : 22000-3039
BUG 6

107' : 21540-3334
LDS4919

109' : 21477-3054
FIN 330AB

111' : 21466-3206
UC 4558

113' : 22029-3243
KPP3096

124' : 21481-3023
RST2187

125' : 21597-2959
COO 247

125' : 22039-3244
RST2191

127' : 21452-3139
DAW 230AB

131' : 21585-2944
LSC 100

134' : 22043-3253
UC 4642

137' : 21576-2935
UC 4613



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.

21551-3148 I 1449 (HD 208166)

 
 
21h 55m 05.58s -31° 47' 47.8" P.A. 268.00 sep 0.3 mag 10.03,10.27 Sp G3/5V dist. 78.74 pc (256.85 l.y.)
 
 
Coord 2000 21551-3148 Discov num I  1449 Comp Coord arcsec 2000 21 55 05.58 -31 47 47.8
Date first 1925 Date last 2017 Obs 11
Pa first 280 Pa last 267.9 P.A. Now (θ) 267.9°
Sep first 0.3 Sep last 0.27 Sep. Now (ρ) 0.27"
Mag pri 10.03 Mag sec 10.27 delta mag (ΔM) 0.24 Spectral class G3/5V (yellow)
Pri motion ra -004 Sec motion ra
Pri motion dec +017 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 208166 Constellation Piscis Austrinus SAO 213391 HIP 108184
Tycho2 7488-01454-1 HD 208166 CD CD-3216809 CP CP-32 6434
Distance 78.74 Distance ly 256.85
 
 
ORBITAL ELEMENTS
 
 
Period (P)87.7y Periastron (T)1998.61y Semi-major axis (a)0.301a
Eccentricity (e)0.759 Inclination (i)120° Longitude of periastron (ω)84.1°
Node (Ω)126.3° Notes ReferenceDoc2019d
Equinox2000 Last observation2017 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 329.4 0.074
2001 314.6 0.109
2002 306.5 0.137
2003 301.1 0.160
2004 296.9 0.179
2005 293.4 0.194
2006 290.3 0.207
2007 287.7 0.218
2008 285.2 0.227
2009 282.9 0.235
2010 280.8 0.242
2011 278.8 0.248
2012 276.9 0.254
2013 275.0 0.258
2014 273.2 0.262
2015 271.5 0.266
2016 269.8 0.269
2017 268.1 0.271
2018 266.5 0.273
2019 264.9 0.275
2020 263.3 0.277
2021 261.7 0.278
2022 260.2 0.279
2023 258.6 0.280
2024 257.1 0.280
2025 255.6 0.281
2026 254.0 0.281
2027 252.5 0.281
2028 251.0 0.281
2029 249.4 0.281
2030 247.9 0.280


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


 
  


wds21551-3148d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21551-3148 I 1449 (HD 208166) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Doc2019d orb - Docobo, J.A. & Campo, P. 2019IAUDS.198S...1C
Doc2019d Inf. Circ. 198, 1, 2019
 
 
DISCOVERER
 
 
idgroup discov author
1 I Innes, R.T.A.
5 I MNRAS 57, 533, 1897 (data also in I__1897b,
5 I I__1897c)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21551-3148 I 1449 1991 10 149 0.2 10.03 10.27 G3/5V O 215505.58-314747.8
21551-3148 I 1449 2017 11 268 0.3 10.03 10.27 G3/5V O 215505.58-314747.8

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

 
 
WDS 21551-3148 I 1449 (HD 208166) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21551-3148 I 1449 (HD 208166) : MEASURES
 
 
No records found.

 
 
WDS 21551-3148 (HD 208166) : VIRTUAL EYEPIECE
 
 

21551-3148 I 1449A mag 10.03 Sp G3/5V 21551-3148 I 1449B sep 0.2 P.A. 267.50 mag 10.27 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 21551-3148 (HD 208166) : ALADIN DSS IMAGE @ 21h 55m 05.58s -31° 47' 47.8"
 
 
 
 
WDS 21551-3148 I 1449 (HD 208166) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21551-3148 I 1449 distance=0' 21567-3123 B 1014 distance=32' 21538-3114 LDS5934 distance=38' 21581-3150 LDS5939 distance=40' 21530-3119 RST2188 distance=40' 21583-3207 RST2190 distance=45' 21528-3112 LDS5932 distance=47' 21575-3105 PRO 234 distance=52' 21560-3055 HJ 5307BC distance=54' 21560-3055 HJ 5307AB distance=54' 21509-3151 LDS4915 distance=55' 21589-3227 LDS4929 distance=63' 21553-3045 HJ 5304 distance=64' 21593-3110 BRT3104 distance=67' 21590-3258 UC 4620 distance=86' 21558-3313 TSN 200 distance=86' 22000-3039 BUG 6 distance=94' 21540-3334 LDS4919 distance=107' 21477-3054 FIN 330AB distance=109' 21477-3054 HJ 5296AB,C distance=109' 21466-3206 UC 4558 distance=111' 22029-3243 KPP3096 distance=113' 21481-3023 RST2187 distance=124' 21597-2959 COO 247 distance=125' 22039-3244 RST2191 distance=125' 21452-3139 DAW 230AB distance=127' 21452-3139 HJ 5293AC distance=127' 21585-2944 LSC 100 distance=131' 22043-3253 UC 4642 distance=134' 21576-2935 UC 4613 distance=137' 22047-3250 SKF1254 distance=137' 21511-2938 LDS5929AB distance=139' 21511-2938 LDS5929Aa,Ab distance=139' 21487-3351 RSS 564 distance=147' 21449-3302 I 1051 distance=149' 21573-3418 HDS3121AB distance=154' 21573-3418 SKF 445AC distance=154' 22053-3022 I 677 distance=157' 21554-3430 I 673 distance=163' 21528-2903 UC 4587 distance=168' 21533-3439 UC 4589 distance=173' 21463-3401 RSS 563 distance=173' 22005-2909 TOI2307 distance=174' 21595-2903 HJ 5311AB distance=175' 21595-2903 HJ 5311AC distance=175' 22064-3006 UC 4649 distance=178' 22075-3026 LDS4944 distance=179' 21514-2853 LDS5930 distance=181' 21490-3431 TSN 100 distance=181' 22018-2907 RST1117 distance=182' 22084-3259 VSP 56 distance=183' 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 21551-3148 I 1449 268 0.3
Show 21567-3123 B 1014 139 2.6 32
Show 21538-3114 LDS5934 69 70.2 38
Show 21581-3150 LDS5939 291 265.4 40
Show 21530-3119 RST2188 1 1.8 40
Show 21583-3207 RST2190 293 1.0 45
Show 21528-3112 LDS5932 173 167.0 47
Show 21575-3105 PRO 234 66 3.3 52
Show 21560-3055 HJ 5307 BC 161 26.2 54
Show 21560-3055 HJ 5307 AB 160 32.6 54
Show 21509-3151 LDS4915 126 3.1 55
Show 21589-3227 LDS4929 353 113.1 63
Show 21553-3045 HJ 5304 255 9.2 64
Show 21593-3110 BRT3104 226 3.4 67
Show 21590-3258 UC 4620 72 57.6 86
Show 21558-3313 TSN 200 229 0.0 86
Show 22000-3039 BUG 6 5 1.0 94
Show 21540-3334 LDS4919 118 36.2 107
Show 21477-3054 FIN 330 AB 347 0.1 109
Show 21477-3054 HJ 5296 AB,C 343 32.1 109
Show 21466-3206 UC 4558 251 18.4 111
Show 22029-3243 KPP3096 329 4.3 113
Show 21481-3023 RST2187 107 2.0 124
Show 21597-2959 COO 247 264 2.6 125
Show 22039-3244 RST2191 307 1.2 125
Show 21452-3139 DAW 230 AB 106 13.1 127
Show 21452-3139 HJ 5293 AC 250 19.0 127
Show 21585-2944 LSC 100 172 0.1 131
Show 22043-3253 UC 4642 303 42.0 134
Show 21576-2935 UC 4613 314 16.5 137
Show 22047-3250 SKF1254 293 10.2 137
Show 21511-2938 LDS5929 AB 128 54.7 139
Show 21511-2938 LDS5929 Aa,Ab 326 1.1 139
Show 21487-3351 RSS 564 172 57.9 147
Show 21449-3302 I 1051 290 20.0 149
Show 21573-3418 HDS3121 AB 105 0.8 154
Show 21573-3418 SKF 445 AC 153 13.7 154
Show 22053-3022 I 677 273 5.5 157
Show 21554-3430 I 673 271 1.0 163
Show 21528-2903 UC 4587 187 10.5 168
Show 21533-3439 UC 4589 235 15.0 173
Show 21463-3401 RSS 563 322 10.7 173
Show 22005-2909 TOI2307 206 2.9 174
Show 21595-2903 HJ 5311 AB 291 39.8 175
Show 21595-2903 HJ 5311 AC 223 43.1 175
Show 22064-3006 UC 4649 353 13.0 178
Show 22075-3026 LDS4944 33 24.4 179
Show 21514-2853 LDS5930 128 257.8 181
Show 21490-3431 TSN 100 106 8.1 181
Show 22018-2907 RST1117 123 0.3 182
Show 22084-3259 VSP 56 200 0.1 183

 
 
WDS 21551-3148 : COMPONENTS
 
 
  A
B pa=267.5°
sep=0.23"
 
 
21551-3148 A
 
 
Componente originario normalizzato AB Name HD 208166 Coord arcsec 2000 215505.58-314747.8 Mag 10.03
Spectral class G3/5V (yellow) PmRA -4.00 PmDE 17.0 SAO 213391
HIP 108184 Tycho2 7488-01454-1 HD 208166 CD CD-3216809
CP CP-32 6434
Tycho2
Tycho2 7488-01454-1 Pflag RAmdeg 328.77322897 DEmdeg -31.79657058
PmRA -0.8 PmDE 16.4 E RAmdeg 10 E DEmdeg 14
E pmRA 1.2 E pmDE 1.2 EpRAm 1989.22 EpDEm 1987.55
Num 14 Q RAmdeg 1.3 Q DEmdeg 1.0 Q pmRA 1.2
Q pmDE 1.1 BTmag 10.088 E BTmag 0.027 VTmag 9.313
E VTmag 0.019 Prox 999 TYC T HIP 108184
CCDM AS RAdeg 328.77323139 DEdeg -31.79661083 EpRA 1990 1.67
EpDE 1990 1.36 E RAdeg 10.9 E DEdeg 14.7 Posflg P
Corr -0.1
SAO
SAO 213391 DelFlag RA1950 PmRA1950 -0.0036
DE1950 PmDE1950 0.008 Vmag 9.2 SpType G0
Double code Source 40 CatNum 11925 DM CD-3216809
DMcomp BDsup HD 208166 M HD 0
GC RA1950rad 5.72539955 DE1950rad -0.55909939 PmRA2000 -0.0036
PmDE2000 0.004
Hipparcos
Catalog H HIP 108184 Proxy H RAhms 21 55 05.58
DEdms -31 47 47.8 Vmag 9.26 VarFlag R Vmag H
RAdeg 328.773 DEdeg -31.7966 AstroRef * Plx 12.74
CCDM 21551-3148 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AS
Theta 149 Rho 0.187 HD 208166 BD
CD CD-3216809 CP CP-32 6434 Dm number -3216809 VIred 0.74
SpType G3/G5V R SpType Coord arcsec 2000 215505.58-314747.8
Hipparcos 2
HIP 108184 Sn 55 So 3 Nc 2
RArad 5.7381754693 DErad -0.5549555771 Plx 12.7 PmRA 1.7
PmDE 15.34 E RArad 1.06 E DErad 0.62 E Plx 1.25
E pmRA 1.25 E pmDE 0.6 Hpmag 9.3935 E Hpmag 0.0024
SHp 0.02 VA 0 BV 0.698 E BV 0.027
VI 0.75
CCDM
Ccdm 21551-3148 RComp Comp A Note1
Note2 Discov num DRAs -0.56 DDEs 12.0
R dRAs 41 Year Theta Rho
Obs 2 Vmag 9.9 Sp G0 PmNote *
PmRA -46 PmDE 8 Dm number -3216809 Cat1 CD
Name2 213391 Cat2 SAO HD 208166 M HD
ADS BDS M ADS BDS N IDS IDS 21492S3216A
HIC 108184
 
 
21551-3148 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 215505.56-314747.8 Mag 10.27 Calc delta mag 0.24
Calc coord yes
CCDM
Ccdm 21551-3148 RComp Comp B Note1
Note2 Discov num I 1449 DRAs DDEs
R dRAs Year 1925 Theta 258 Rho 0.3
Obs 3 Vmag 10.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 21492S3216B
HIC 108184