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Doubles in session


Current system
20551-5207
I 18
HD 198829


Nearby doubles
2' : 20549-5207
ARY 78

31' : 20577-5148
RST1078

34' : 20570-5138
KPP 480

40' : 20511-5154
SHN 248

41' : 20525-5136
ALD 94

42' : 20597-5211
I 669AB

43' : 20506-5218
HU 1623

50' : 20500-5220
I 1428

50' : 20508-5237
RST1077

58' : 20539-5111
CPO 618

60' : 20594-5252
UC 4351

62' : 20485-5200
B 1388

65' : 20492-5242
UC 4300AB

73' : 21000-5111
I 1432

81' : 21009-5107
RST1079

81' : 21013-5110
KPP2255

83' : 21031-5246
RST1080

89' : 20590-5328
UC 4349

91' : 21000-5326
HDS2993

92' : 20596-5329
KPP 482

92' : 21049-5147
B 1390

98' : 20596-5336
B 511

99' : 21056-5151
I 1433

103' : 20516-5030
KPP 479

108' : 21064-5143
NSN 453

109' : 20436-5148
I 128



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.

20551-5207 I 18 (HD 198829)

 
 
20h 55m 08.17s -52° 07' 10.5" P.A. 359.00 sep 4.0 mag 7.12,10.20 Sp G5 dist. 43.73 pc (142.65 l.y.)
 
 
Coord 2000 20551-5207 Discov num I    18 Comp Coord arcsec 2000 20 55 08.17 -52 07 10.5
Date first 1894 Date last 2016 Obs 14
Pa first 0 Pa last 359.1 P.A. Now (θ) 359.1°
Sep first 5.0 Sep last 3.952 Sep. Now (ρ) 3.952"
Mag pri 7.12 Mag sec 10.20 delta mag (ΔM) 3.08 Spectral class G5 (yellow)
Pri motion ra +108 Sec motion ra
Pri motion dec -113 Sec motion dec
Notes N (See Notes)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 198829 Constellation Indus SAO 246790 HIP 103260
Tycho2 8420-00895-1 Gaia DR2 6477350546874615808 HD 198829 GC 29152
CP CP-5211793 Distance 43.73 Distance ly 142.65
 
 
WDS 20551-5207 I 18 (HD 198829) : NOTES
 
 
discov_num notes refcode
I 18 The known 3".9 pair I 18 with estimated period ~1700 yr cannot explain
the acceleration. Tok2012a
CPM. Is the acceleration caused by this binary or sub-system? Tok2014d
 
 
REFERENCES
 
 
refcode metd author reference
Tok2012a A j Tokovinin, A., Hartnung, M., Hayward, T.L., & Makarov, V.V. 2012AJ....144....7T
Tok2012a AJ 144, 7, 2012
Tok2014d E2 - Tokovinin, A. 2014AJ....147...86T
Tok2014d AJ 147, 86, 2014
 
 
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
20551-5207 I 18 1999 8 0 3.6 7.00 10.20 G5 D 205508.17-520710.5
20551-5207 I 18 2011 10 359 4.0 7.00 10.20 G5 D 205508.17-520710.5
20551-5207 I 18 2015 12 359 4.0 7.12 10.20 G5 N 205508.17-520710.5
20551-5207 I 18 2016 14 359 4.0 7.12 10.20 G5 N 205508.17-520710.5

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

 
 
WDS 20551-5207 I 18 (HD 198829) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20551-5207 I 18 (HD 198829) : MEASURES
 
 
No records found.

 
 
WDS 20551-5207 (HD 198829) : VIRTUAL EYEPIECE
 
 

20551-5207 I 18A mag 7.12 Sp G5 20551-5207 I 18B sep 4.0 P.A. 359.40 mag 10.2 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 20551-5207 (HD 198829) : ALADIN DSS IMAGE @ 20h 55m 08.17s -52° 07' 10.5"
 
 
 
 
WDS 20551-5207 I 18 (HD 198829) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20551-5207 I 18 distance=1' 20549-5207 ARY 78 distance=2' 20577-5148 RST1078 distance=31' 20570-5138 KPP 480 distance=34' 20511-5154 SHN 248 distance=40' 20525-5136 ALD 94 distance=41' 20597-5211 I 669AB distance=42' 20597-5211 I 669AC distance=42' 20506-5218 HU 1623 distance=43' 20500-5220 I 1428 distance=50' 20508-5237 RST1077 distance=50' 20539-5111 CPO 618 distance=58' 20594-5252 UC 4351 distance=60' 20485-5200 B 1388 distance=62' 20492-5242 UC 4300AB distance=65' 21000-5111 I 1432 distance=73' 21009-5107 RST1079 distance=81' 21013-5110 KPP2255 distance=81' 21031-5246 RST1080 distance=83' 20590-5328 UC 4349 distance=89' 21000-5326 HDS2993 distance=91' 20596-5329 KPP 482 distance=92' 21049-5147 B 1390 distance=92' 20596-5336 B 511 distance=98' 21056-5151 I 1433 distance=99' 20516-5030 KPP 479 distance=103' 21064-5143 NSN 453 distance=108' 20436-5148 I 128 distance=109' 20455-5105 HU 1618 distance=109' 20458-5317 UC 4283 distance=110' 21005-5356 KPP3078 distance=120' 21027-5030 B 2489 distance=121' 21014-5019 SKF 379 distance=124' 21076-5114 HDS3011 distance=128' 21037-5021 UC 4369 distance=134' 21086-5121 RST1082 distance=134' 21004-5003 UC 4358 distance=135' 21098-5155 RST1084 distance=136' 20450-5029 I 17AB distance=137' 20450-5029 DUN 235AC distance=137' 20491-5415 UC 4299 distance=140' 21098-5302 UC 4393 distance=145' 20394-5216 UC 4245 distance=146' 20403-5114 HU 1617 distance=149' 20546-4938 TOK 680AB distance=150' 20546-4938 TOK 680AC distance=150' 21114-5220 HU 1626 distance=150' 21097-5055 UC 4392 distance=155' 20384-5221 RST1074AB distance=156' 20598-5437 LDS 730 distance=156' 20484-5431 HDS2964 distance=156' 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 20551-5207 I 18 359 4.0 1
Show 20549-5207 ARY 78 302 31.7 2
Show 20577-5148 RST1078 114 1.1 31
Show 20570-5138 KPP 480 259 3.9 34
Show 20511-5154 SHN 248 344 1.3 40
Show 20525-5136 ALD 94 304 1.7 41
Show 20597-5211 I 669 AB 67 0.4 42
Show 20597-5211 I 669 AC 282 33.4 42
Show 20506-5218 HU 1623 229 1.6 43
Show 20500-5220 I 1428 304 6.9 50
Show 20508-5237 RST1077 193 1.2 50
Show 20539-5111 CPO 618 315 6.1 58
Show 20594-5252 UC 4351 301 6.4 60
Show 20485-5200 B 1388 327 5.4 62
Show 20492-5242 UC 4300 AB 240 62.2 65
Show 21000-5111 I 1432 272 0.3 73
Show 21009-5107 RST1079 101 2.0 81
Show 21013-5110 KPP2255 27 18.8 81
Show 21031-5246 RST1080 52 5.5 83
Show 20590-5328 UC 4349 287 10.4 89
Show 21000-5326 HDS2993 235 0.1 91
Show 20596-5329 KPP 482 246 3.7 92
Show 21049-5147 B 1390 236 2.7 92
Show 20596-5336 B 511 167 1.3 98
Show 21056-5151 I 1433 36 0.8 99
Show 20516-5030 KPP 479 347 4.9 103
Show 21064-5143 NSN 453 58 1.3 108
Show 20436-5148 I 128 328 3.6 109
Show 20455-5105 HU 1618 240 1.0 109
Show 20458-5317 UC 4283 105 7.3 110
Show 21005-5356 KPP3078 214 6.2 120
Show 21027-5030 B 2489 7 5.4 121
Show 21014-5019 SKF 379 158 12.9 124
Show 21076-5114 HDS3011 349 1.2 128
Show 21037-5021 UC 4369 79 23.6 134
Show 21086-5121 RST1082 183 2.4 134
Show 21004-5003 UC 4358 261 11.1 135
Show 21098-5155 RST1084 35 1.4 136
Show 20450-5029 I 17 AB 32 1.2 137
Show 20450-5029 DUN 235 AC 122 125.4 137
Show 20491-5415 UC 4299 316 20.1 140
Show 21098-5302 UC 4393 343 55.5 145
Show 20394-5216 UC 4245 199 24.1 146
Show 20403-5114 HU 1617 279 0.2 149
Show 20546-4938 TOK 680 AB 271 5.3 150
Show 20546-4938 TOK 680 AC 333 7.0 150
Show 21114-5220 HU 1626 104 0.9 150
Show 21097-5055 UC 4392 347 57.6 155
Show 20384-5221 RST1074 AB 226 2.5 156
Show 20598-5437 LDS 730 311 33.1 156
Show 20484-5431 HDS2964 79 0.9 156

 
 
WDS 20551-5207 : COMPONENTS
 
 
  A
B pa=359.4°
sep=3.95"
 
 
20551-5207 A
 
 
Componente originario normalizzato AB Name HD 198829 Coord arcsec 2000 205508.17-520710.5 Mag 7.12
Spectral class G5 (yellow) PmRA 108.00 PmDE -113.0 SAO 246790
HIP 103260 Tycho2 8420-00895-1 HD 198829 GC 29152
CP CP-5211793
Tycho2
Tycho2 8420-00895-1 Pflag RAmdeg 313.78443436 DEmdeg -52.11984892
PmRA 102.3 PmDE -109.6 E RAmdeg 4 E DEmdeg 5
E pmRA 1.6 E pmDE 1.5 EpRAm 1991.61 EpDEm 1991.53
Num 12 Q RAmdeg 1.2 Q DEmdeg 1.4 Q pmRA 1.3
Q pmDE 1.5 BTmag 7.766 E BTmag 0.016 VTmag 7.123
E VTmag 0.010 Prox 978 TYC T HIP 103260
CCDM RAdeg 313.78405250 DEdeg -52.11959833 EpRA 1990 1.75
EpDE 1990 1.77 E RAdeg 4.2 E DEdeg 4.7 Posflg
Corr 0.0
SAO
SAO 246790 DelFlag RA1950 PmRA1950 0.0129
DE1950 PmDE1950 -0.117 Vmag 7.2 SpType G5
Double code Source 70 CatNum 29152 DM CP-5211793
DMcomp BDsup HD 198829 M HD 0
GC 29152 RA1950rad 5.46078905 DE1950rad -0.91297403 PmRA2000 0.0126
PmDE2000 -0.12
Hipparcos
Catalog H HIP 103260 Proxy RAhms 20 55 08.17
DEdms -52 07 10.5 Vmag 7.02 VarFlag R Vmag H
RAdeg 313.784 DEdeg -52.1196 AstroRef Plx 21.64
CCDM 20551-5207 N CCDM I Nsys 1 Ncomp 1
MultFlag G Source Qual M HIP
Theta Rho HD 198829 BD
CD CP CP-5211793 Dm number -5211793 VIred 0.66
SpType K0:III+... R SpType Coord arcsec 2000 205508.17-520710.5
Hipparcos 2
HIP 103260 Sn 5 So 1 Nc 1
RArad 5.4765643614 DErad -0.9096583502 Plx 22.87 PmRA 103.39
PmDE -111.74 E RArad 0.82 E DErad 0.7 E Plx 1.11
E pmRA 1.05 E pmDE 0.66 Hpmag 7.1512 E Hpmag 0.0013
SHp 0.008 VA 0 BV 0.607 E BV 0.008
VI 0.68
CCDM
Ccdm 20551-5207 RComp Comp A Note1
Note2 Discov num DRAs 2.33 DDEs -12.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.0 Sp G5 PmNote *
PmRA 116 PmDE -115 Dm number -5211793 Cat1 CPD
Name2 246790 Cat2 SAO HD 198829 M HD
ADS BDS M ADS BDS N IDS IDS 20479S5230A
HIC 103260
 
 
20551-5207 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 205508.17-520706.5 Mag 10.2 Calc delta mag 3.08
Calc coord yes
CCDM
Ccdm 20551-5207 RComp Comp B Note1
Note2 Discov num I 18 DRAs DDEs
R dRAs Year 1900 Theta 002 Rho 4.2
Obs 5 Vmag 10.2 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 20479S5230B
HIC 103260