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Current system
21400-5222
HDS 3084
HD 205877


Nearby doubles
14' : 21387-5228
UC 4518

24' : 21394-5159
RST1102AB

41' : 21441-5236
RST1104

47' : 21450-5228
SKF1174

54' : 21351-5250
RST1096

56' : 21386-5128
HU 1632

57' : 21461-5215
RST1106

71' : 21353-5318
HJ 5277

80' : 21428-5107
CPO 625

86' : 21492-5243
RST1110

89' : 21354-5104
HDS3073

96' : 21318-5124
KPP2453

97' : 21452-5346
TDT3138

101' : 21404-5402
TOI2203

101' : 21325-5109
RST1091

103' : 21511-5220
RST1112

103' : 21328-5103
RST1092

108' : 21479-5103
UC 4567

109' : 21342-5048
UC 4498

110' : 21449-5042
KPP2577

112' : 21283-5152
HU 1629

115' : 21445-5408
HJ 5290

123' : 21449-5028
TDT3134

124' : 21486-5358
UC 4571

130' : 21263-5257
RST1089

132' : 21462-5419
LDS 754AB



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.

21400-5222 HDS 3084 (HD 205877)

 
 
21h 39m 59.74s -52° 21' 32.5" P.A. 106.00 sep 0.0 mag 6.88,7.30 Sp F7III dist. 173.91 pc (567.29 l.y.)
 
 
Coord 2000 21400-5222 Discov num HDS3084 Comp Coord arcsec 2000 21 39 59.74 -52 21 32.5
Date first 1991 Date last 2021 Obs 16
Pa first 321 Pa last 106 P.A. Now (θ) 61°
Sep first 0.1 Sep last 0.04 Sep. Now (ρ) 0.055"
Mag pri 6.88 Mag sec 7.30 delta mag (ΔM) 0.42 Spectral class F7III (yellow-white)
Pri motion ra -019 Sec motion ra
Pri motion dec +007 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 205877 Constellation Indus SAO 247128 HIP 106978
Tycho2 8436-00887-1 Gaia DR2 6462505250113259008 HD 205877 HR 8269
GC 30304 CP CP-5211911 FK5 3726 Distance 173.91
Distance ly 567.29
 
 
ORBITAL ELEMENTS
 
 
Period (P)21.32y± 0.56 Periastron (T)1999.13y± 0.62 Semi-major axis (a)0.076a± 0.001
Eccentricity (e)0.461± 0.007 Inclination (i)149.4°± 3.2 Longitude of periastron (ω)16.6°± 4.9
Node (Ω)176.2°± 4.7 Notes ReferenceTok2021f
Equinox2000 Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 121.2 0.040
2001 80.6 0.047
2002 53.8 0.059
2003 36.3 0.072
2004 24.0 0.083
2005 14.4 0.093
2006 6.4 0.100
2007 359.4 0.105
2008 352.9 0.109
2009 346.7 0.110
2010 340.5 0.110
2011 334.2 0.107
2012 327.5 0.103
2013 320.2 0.098
2014 311.8 0.091
2015 301.8 0.082
2016 289.4 0.073
2017 273.1 0.063
2018 250.7 0.053
2019 220.2 0.046
2020 181.6 0.042
2021 136.2 0.040
2022 92.1 0.044
2023 61.0 0.055
2024 41.2 0.068
2025 27.6 0.080
2026 17.2 0.090
2027 8.8 0.098
2028 1.5 0.104
2029 354.9 0.108
2030 348.6 0.110


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


 
  


wds21400-5222a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21400-5222 HDS 3084 (HD 205877) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2021f orb - Tokovinin, A. 2021IAUDS.204....1T
Tok2021f Inf. Circ. 204, 1, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 HDS Hipparcos Double Star (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
21400-5222 HDS3084 1991 1 321 0.1 6.88 7.30 F7III 213959.74-522132.5
21400-5222 HDS3084 2008 4 170 0.1 6.88 7.30 F7III 213959.74-522132.5
21400-5222 HDS3084 2014 5 304 0.1 6.88 7.30 F7III 213959.74-522132.5
21400-5222 HDS3084 2017 9 265 0.1 6.88 7.30 F7III 213959.74-522132.5
21400-5222 HDS3084 2018 11 229 0.0 6.88 7.30 F7III O 213959.74-522132.5
21400-5222 HDS3084 2019 13 188 0.0 6.88 7.30 F7III O 213959.74-522132.5
21400-5222 HDS3084 2020 14 148 0.0 6.88 7.30 F7III O 213959.74-522132.5
21400-5222 HDS3084 2021 16 106 0.0 6.88 7.30 F7III O 213959.74-522132.5

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

 
 
WDS 21400-5222 HDS 3084 (HD 205877) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21400-5222 HDS 3084 (HD 205877) : MEASURES
 
 
No records found.

 
 
WDS 21400-5222 (HD 205877) : VIRTUAL EYEPIECE
 
 

21400-5222 HDS3084A mag 6.88 Sp F7III 21400-5222 HDS3084B mag 7.3 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 21400-5222 (HD 205877) : ALADIN DSS IMAGE @ 21h 39m 59.74s -52° 21' 32.5"
 
 
 
 
WDS 21400-5222 HDS 3084 (HD 205877) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21400-5222 HDS3084 distance=0' 21387-5228 UC 4518 distance=14' 21394-5159 RST1102AB distance=24' 21441-5236 RST1104 distance=41' 21450-5228 SKF1174 distance=47' 21351-5250 RST1096 distance=54' 21386-5128 HU 1632 distance=56' 21461-5215 RST1106 distance=57' 21353-5318 HJ 5277 distance=71' 21428-5107 CPO 625 distance=80' 21492-5243 RST1110 distance=86' 21354-5104 HDS3073 distance=89' 21318-5124 KPP2453 distance=96' 21452-5346 TDT3138 distance=97' 21404-5402 TOI2203 distance=101' 21325-5109 RST1091 distance=101' 21511-5220 RST1112 distance=103' 21328-5103 RST1092 distance=103' 21479-5103 UC 4567 distance=108' 21342-5048 UC 4498 distance=109' 21449-5042 KPP2577 distance=110' 21283-5152 HU 1629 distance=112' 21445-5408 HJ 5290 distance=115' 21449-5028 TDT3134 distance=123' 21486-5358 UC 4571 distance=124' 21263-5257 RST1089 distance=130' 21462-5419 LDS 754AB distance=132' 21418-5010 TDT3112 distance=133' 21487-5411 TDT3167 distance=135' 21418-5435 TDT3113 distance=135' 21364-5007 RST1097 distance=139' 21358-5435 RST5554 distance=139' 21286-5051 UC 4475 distance=140' 21473-5011 TDS1145 distance=148' 21530-5352 BRT2103 distance=148' 21549-5121 SKF1176 distance=149' 21504-5424 COO 244 distance=154' 21337-4959 RST1094 distance=155' 21419-5456 BRT3189 distance=156' 21326-5003 TDT3021 distance=156' 21565-5303 B 2498AB distance=156' 21565-5303 HJ 5302AC distance=156' 21230-5157 I 132 distance=158' 21484-5446 RST1109 distance=163' 21392-4939 RST1101 distance=163' 21231-5122 UC 4464 distance=168' 21585-5302 B 546 distance=173' 21273-5016 BRT1119 distance=174' 21582-5316 TDT3264 distance=174' 21210-5229 CVN 66AB distance=174' 21210-5229 CVN 66AC distance=174' 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 21400-5222 HDS3084 106 0.0
Show 21387-5228 UC 4518 48 50.8 14
Show 21394-5159 RST1102 AB 28 1.5 24
Show 21441-5236 RST1104 186 1.6 41
Show 21450-5228 SKF1174 104 29.3 47
Show 21351-5250 RST1096 188 2.0 54
Show 21386-5128 HU 1632 178 1.6 56
Show 21461-5215 RST1106 136 0.4 57
Show 21353-5318 HJ 5277 59 14.9 71
Show 21428-5107 CPO 625 98 5.6 80
Show 21492-5243 RST1110 291 2.8 86
Show 21354-5104 HDS3073 9.5 89
Show 21318-5124 KPP2453 255 21.7 96
Show 21452-5346 TDT3138 247 0.7 97
Show 21404-5402 TOI2203 81 0.1 101
Show 21325-5109 RST1091 56 0.6 101
Show 21511-5220 RST1112 1 0.5 103
Show 21328-5103 RST1092 311 0.9 103
Show 21479-5103 UC 4567 153 29.0 108
Show 21342-5048 UC 4498 299 10.1 109
Show 21449-5042 KPP2577 359 23.3 110
Show 21283-5152 HU 1629 248 1.3 112
Show 21445-5408 HJ 5290 291 11.1 115
Show 21449-5028 TDT3134 13 1.1 123
Show 21486-5358 UC 4571 174 53.8 124
Show 21263-5257 RST1089 99 1.0 130
Show 21462-5419 LDS 754 AB 270 32.7 132
Show 21418-5010 TDT3112 90 0.5 133
Show 21487-5411 TDT3167 275 0.6 135
Show 21418-5435 TDT3113 301 0.5 135
Show 21364-5007 RST1097 42 0.8 139
Show 21358-5435 RST5554 254 1.2 139
Show 21286-5051 UC 4475 272 17.2 140
Show 21473-5011 TDS1145 96 1.0 148
Show 21530-5352 BRT2103 118 4.4 148
Show 21549-5121 SKF1176 67 23.5 149
Show 21504-5424 COO 244 148 3.7 154
Show 21337-4959 RST1094 197 0.3 155
Show 21419-5456 BRT3189 293 4.5 156
Show 21326-5003 TDT3021 326 0.5 156
Show 21565-5303 B 2498 AB 251 2.4 156
Show 21565-5303 HJ 5302 AC 355 11.2 156
Show 21230-5157 I 132 276 1.2 158
Show 21484-5446 RST1109 101 2.8 163
Show 21392-4939 RST1101 214 0.6 163
Show 21231-5122 UC 4464 203 9.4 168
Show 21585-5302 B 546 342 0.6 173
Show 21273-5016 BRT1119 159 3.8 174
Show 21582-5316 TDT3264 18 0.5 174
Show 21210-5229 CVN 66 AB 48 3.3 174
Show 21210-5229 CVN 66 AC 161 5.9 174

 
 
WDS 21400-5222 : COMPONENTS
 
 
  A
B pa=115.2°
sep=0.03"
 
 
21400-5222 A
 
 
Componente originario normalizzato AB Name HD 205877 Coord arcsec 2000 213959.74-522132.5 Mag 6.88
Spectral class F7III (yellow-white) PmRA -19.00 PmDE 7.0 SAO 247128
HIP 106978 Tycho2 8436-00887-1 HD 205877 HR 8269
GC 30304 CP CP-5211911 FK5 3726
Tycho2
Tycho2 8436-00887-1 Pflag RAmdeg 324.99882200 DEmdeg -52.35901461
PmRA -19.1 PmDE 5.9 E RAmdeg 3 E DEmdeg 4
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.53 EpDEm 1990.88
Num 15 Q RAmdeg 1.0 Q DEmdeg 1.0 Q pmRA 1.0
Q pmDE 1.1 BTmag 6.910 E BTmag 0.014 VTmag 6.269
E VTmag 0.009 Prox 999 TYC T HIP 106978
CCDM AB RAdeg 324.99889389 DEdeg -52.35902889 EpRA 1990 1.73
EpDE 1990 1.16 E RAdeg 3.3 E DEdeg 3.8 Posflg P
Corr 0.1
SAO
SAO 247128 DelFlag RA1950 PmRA1950 -0.0017
DE1950 PmDE1950 0.014 Vmag 6.3 SpType F5
Double code Source 70 CatNum 30304 DM CP-5211911
DMcomp BDsup HD 205877 M HD 0
GC 30304 RA1950rad 5.65745596 DE1950rad -0.91779806 PmRA2000 -0.002
PmDE2000 0.009
Hipparcos
Catalog H HIP 106978 Proxy H RAhms 21 39 59.74
DEdms -52 21 32.5 Vmag 6.2 VarFlag 2 R Vmag G
RAdeg 324.999 DEdeg -52.359 AstroRef * Plx 5.17
CCDM 21400-5222 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 321 Rho 0.109 HD 205877 BD
CD CP CP-5211911 Dm number -5211911 VIred 0.67
SpType F7III R SpType Coord arcsec 2000 213959.74-522132.5
Hipparcos 2
HIP 106978 Sn 55 So 3 Nc 2
RArad 5.6723008507 DErad -0.9138374027 Plx 5.75 PmRA -17.62
PmDE 7.04 E RArad 0.45 E DErad 0.31 E Plx 0.55
E pmRA 0.59 E pmDE 0.37 Hpmag 6.3185 E Hpmag 0.0009
SHp 0.01 VA 2 BV 0.584 E BV 0.003
VI 0.67
CCDM
Ccdm 21400-5222 RComp Comp A Note1
Note2 Discov num DRAs -0.28 DDEs 27.5
R dRAs 82 Year Theta Rho
Obs 2 Vmag 6.9 Sp F7 PmNote *
PmRA -19 PmDE 7 Dm number -5211911 Cat1 CPD
Name2 247128 Cat2 SAO HD 205877 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 106978
 
 
21400-5222 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 213959.74-522132.5 Mag 7.3 Calc delta mag 0.42
Calc coord yes
CCDM
Ccdm 21400-5222 RComp Comp B Note1
Note2 Discov num HDS DRAs -0.29 DDEs 27.6
R dRAs 82 Year 1991 Theta 321 Rho 0.1
Obs 1 Vmag 7.3 Sp PmNote *
PmRA -19 PmDE 7 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 106978