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Doubles in session


Current system
21379+2102
YR 30
HD 205897


Nearby doubles
28' : 21393+2043
STT 445

31' : 21391+2036
STT 444

34' : 21397+2041
GMC 23

44' : 21352+2124
BU 74

53' : 21417+2100
UC 4531

56' : 21408+2140
LDS4903

65' : 21399+2005
UC 4521

67' : 21427+2102
J 614

73' : 21330+2043
STF2804AB

74' : 21424+2140
GRV 495

76' : 21403+1955
SLW1246

77' : 21326+2048
GMC 21

78' : 21433+2046
J 852

78' : 21334+2018
J 613

84' : 21347+1953
TDT3040

86' : 21429+2152
HJ 1683AB

88' : 21373+2230
CVR 911

89' : 21434+2147
COU 536

91' : 21431+2157
BRT2499

93' : 21419+1949
CBL 533

93' : 21313+2112
GRV 473

101' : 21310+2128
COU 232

109' : 21349+1923
TDT3041

109' : 21368+1915
BRT2498

109' : 21457+2100
UC 4553

113' : 21399+1914
COU 330



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.

21379+2102 YR 30 (HD 205897)

 
 
21h 37m 56.03s +21° 02' 28.3" P.A. 340.00 sep 0.1 mag 8.90,9.00 Sp G5 dist. 112.11 pc (365.7 l.y.)
 
 
Coord 2000 21379+2102 Discov num YR   30 Comp Coord arcsec 2000 21 37 56.03 +21 02 28.3
Date first 2000 Date last 2021 Obs 15
Pa first 334 Pa last 339.6 P.A. Now (θ) 344.7°
Sep first 0.1 Sep last 0.148 Sep. Now (ρ) 0.145"
Mag pri 8.90 Mag sec 9.00 delta mag (ΔM) 0.1 Spectral class G5 (yellow)
Pri motion ra +053 Sec motion ra
Pri motion dec +081 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 205897 Constellation Pegasus SAO 89858 HIP 106804
Tycho2 1677-00210-1 Gaia DR2 1787577143922361984 HD 205897 BD BD+20 4977
Distance 112.11 Distance ly 365.7
 
 
ORBITAL ELEMENTS
 
 
Period (P)18.472y± 0.396 Periastron (T)2011.139y± 0.31 Semi-major axis (a)0.087a± 0.0078
Eccentricity (e)0.771± 0.279 Inclination (i)43.7°± 12 Longitude of periastron (ω)343.2°± 23.1
Node (Ω)169°± 18.6 Notes ReferenceCve2017b
Equinox2000 Last observation2015 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 330.8 0.143
2001 334.0 0.149
2002 337.0 0.151
2003 339.9 0.151
2004 343.0 0.148
2005 346.2 0.142
2006 349.8 0.132
2007 354.1 0.119
2008 359.6 0.102
2009 8.1 0.078
2010 26.1 0.047
2011 130.0 0.018
2012 258.2 0.033
2013 293.7 0.059
2014 307.5 0.083
2015 315.5 0.102
2016 321.1 0.118
2017 325.5 0.130
2018 329.2 0.140
2019 332.5 0.146
2020 335.6 0.150
2021 338.5 0.151
2022 341.5 0.150
2023 344.7 0.145
2024 348.0 0.137
2025 352.0 0.126
2026 356.8 0.111
2027 3.5 0.090
2028 15.3 0.063
2029 54.0 0.027
2030 214.5 0.023


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


 
  


wds21379%2B2102a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21379+2102 YR 30 (HD 205897) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Cve2017b orb - Cvetkovic, Z. & Pavlovic, R. 2017AJ....154..273C
Cve2017b AJ 154, 273, 2017
 
 
DISCOVERER
 
 
idgroup discov author
1 YR Yale-Rochester (from additional DD list - see HOR)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21379+2102 YR 30 2003 4 343 0.1 8.17   D 213756.03+210228.3
21379+2102 YR 30 2006 5 356 0.1 8.90 9.00 D 213756.03+210228.3
21379+2102 YR 30 2008 7 1 0.1 8.90 9.00 D 213756.03+210228.3
21379+2102 YR 30 2015 9 320 0.1 8.90 9.00 G5 213756.03+210228.3
21379+2102 YR 30 2017 12 328 0.1 8.90 9.00 G5 213756.03+210228.3
21379+2102 YR 30 2018 13 330 0.1 8.90 9.00 G5 O 213756.03+210228.3
21379+2102 YR 30 2019 14 333 0.1 8.90 9.00 G5 O 213756.03+210228.3
21379+2102 YR 30 2021 15 340 0.1 8.90 9.00 G5 O 213756.03+210228.3

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

 
 
WDS 21379+2102 YR 30 (HD 205897) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21379+2102 YR 30 (HD 205897) : MEASURES
 
 
No records found.

 
 
WDS 21379+2102 (HD 205897) : VIRTUAL EYEPIECE
 
 

21379+2102 YR 30A mag 8.9 Sp G5 21379+2102 YR 30B sep 0.1 P.A. 340.90 mag 9 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 21379+2102 (HD 205897) : ALADIN DSS IMAGE @ 21h 37m 56.03s +21° 02' 28.3"
 
 
 
 
WDS 21379+2102 YR 30 (HD 205897) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21379+2102 YR 30 distance=0' 21393+2043 STT 445 distance=28' 21391+2036 STT 444 distance=31' 21397+2041 GMC 23 distance=34' 21352+2124 BU 74 distance=44' 21417+2100 UC 4531 distance=53' 21408+2140 LDS4903 distance=56' 21399+2005 UC 4521 distance=65' 21427+2102 J 614 distance=67' 21330+2043 STF2804AB distance=73' 21330+2043 STF2804AC distance=73' 21424+2140 GRV 495 distance=74' 21403+1955 SLW1246 distance=76' 21326+2048 GMC 21 distance=77' 21433+2046 J 852 distance=78' 21334+2018 J 613 distance=78' 21347+1953 TDT3040 distance=84' 21429+2152 HJ 1683AB distance=86' 21429+2152 HJ 1683AC distance=86' 21429+2152 ABH 150AD distance=86' 21373+2230 CVR 911 distance=88' 21434+2147 COU 536 distance=89' 21431+2157 BRT2499 distance=91' 21419+1949 CBL 533 distance=93' 21313+2112 GRV 473 distance=93' 21310+2128 COU 232 distance=101' 21349+1923 TDT3041 distance=109' 21368+1915 BRT2498 distance=109' 21457+2100 UC 4553 distance=109' 21399+1914 COU 330 distance=113' 21362+1912 TDT3052 distance=114' 21461+2111 AG 277 distance=115' 21409+1915 HDS3086 distance=115' 21455+2156 AG 276 distance=119' 21385+1902 TDT3077AB distance=121' 21385+1902 SKF 292AB,C distance=121' 21451+1954 RAO 466 distance=122' 21458+2155 HU 1656 distance=123' 21384+1858 TDT3075 distance=125' 21423+2252 AZC 114 distance=125' 21368+1858 TDT3062 distance=126' 21461+2001 HU 376 distance=131' 21287+2028 J 611 distance=134' 21473+2134 GRV 505 distance=135' 21465+2210 HO 465BC distance=137' 21398+2317 CVR 913 distance=137' 21465+2210 HDS3101Aa,Ab distance=138' 21465+2210 HO 465AB distance=138' 21420+1856 DAM 16CD distance=139' 21420+1856 LBU 2Aa,Ab distance=139' 21420+1856 STF2818AB distance=139' 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 21379+2102 YR 30 340 0.1
Show 21393+2043 STT 445 120 1.0 28
Show 21391+2036 STT 444 277 8.0 31
Show 21397+2041 GMC 23 342 10.5 34
Show 21352+2124 BU 74 338 1.0 44
Show 21417+2100 UC 4531 213 69.8 53
Show 21408+2140 LDS4903 100 81.0 56
Show 21399+2005 UC 4521 35 12.3 65
Show 21427+2102 J 614 307 2.0 67
Show 21330+2043 STF2804 AB 359 3.4 73
Show 21330+2043 STF2804 AC 103 97.1 73
Show 21424+2140 GRV 495 146 33.8 74
Show 21403+1955 SLW1246 345 155.2 76
Show 21326+2048 GMC 21 130 10.5 77
Show 21433+2046 J 852 92 4.2 78
Show 21334+2018 J 613 222 5.1 78
Show 21347+1953 TDT3040 23 0.9 84
Show 21429+2152 HJ 1683 AB 169 12.6 86
Show 21429+2152 HJ 1683 AC 315 27.3 86
Show 21429+2152 ABH 150 AD 28 75.5 86
Show 21373+2230 CVR 911 174 10.5 88
Show 21434+2147 COU 536 227 1.0 89
Show 21431+2157 BRT2499 206 4.8 91
Show 21419+1949 CBL 533 123 64.8 93
Show 21313+2112 GRV 473 26 46.4 93
Show 21310+2128 COU 232 34 0.6 101
Show 21349+1923 TDT3041 350 0.8 109
Show 21368+1915 BRT2498 268 5.0 109
Show 21457+2100 UC 4553 184 63.7 109
Show 21399+1914 COU 330 190 0.5 113
Show 21362+1912 TDT3052 197 1.7 114
Show 21461+2111 AG 277 62 2.7 115
Show 21409+1915 HDS3086 66 1.1 115
Show 21455+2156 AG 276 1 2.0 119
Show 21385+1902 TDT3077 AB 294 0.4 121
Show 21385+1902 SKF 292 AB,C 91 16.2 121
Show 21451+1954 RAO 466 249 0.6 122
Show 21458+2155 HU 1656 305 2.2 123
Show 21384+1858 TDT3075 250 1.0 125
Show 21423+2252 AZC 114 162 16.8 125
Show 21368+1858 TDT3062 151 0.6 126
Show 21461+2001 HU 376 14 1.4 131
Show 21287+2028 J 611 21 1.8 134
Show 21473+2134 GRV 505 327 45.5 135
Show 21465+2210 HO 465 BC 80 4.9 137
Show 21398+2317 CVR 913 39 17.1 137
Show 21465+2210 HDS3101 Aa,Ab 22 0.1 138
Show 21465+2210 HO 465 AB 246 44.5 138
Show 21420+1856 DAM 16 CD 90 3.5 139
Show 21420+1856 LBU 2 Aa,Ab 22 0.6 139
Show 21420+1856 STF2818 AB 24 26.8 139

 
 
WDS 21379+2102 : COMPONENTS
 
 
  A
B pa=340.9°
sep=0.15"
 
 
21379+2102 A
 
 
Componente originario normalizzato AB Name HD 205897 Coord arcsec 2000 213756.03+210228.3 Mag 8.9
Spectral class G5 (yellow) PmRA 53.00 PmDE 81.0 SAO 89858
HIP 106804 Tycho2 1677-00210-1 HD 205897 BD BD+20 4977
Tycho2
Tycho2 1677-00210-1 Pflag RAmdeg 324.48361038 DEmdeg 21.04139748
PmRA 53.3 PmDE 80.6 E RAmdeg 5 E DEmdeg 6
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.37 EpDEm 1991.25
Num 12 Q RAmdeg 1.0 Q DEmdeg 0.7 Q pmRA 1.0
Q pmDE 0.7 BTmag 8.936 E BTmag 0.016 VTmag 8.240
E VTmag 0.011 Prox 999 TYC T HIP 106804
CCDM RAdeg 324.48348222 DEdeg 21.04121806 EpRA 1990 1.90
EpDE 1990 1.97 E RAdeg 4.6 E DEdeg 5.5 Posflg
Corr -0.1
SAO
SAO 89858 DelFlag RA1950 PmRA1950 0.0028
DE1950 PmDE1950 0.086 Vmag 8.3 SpType G5
Double code Source 35 CatNum 8320 DM BD+20 4977
DMcomp BDsup HD 205897 M HD 0
GC RA1950rad 5.65319487 DE1950rad 0.36328091 PmRA2000 0.0028
PmDE2000 0.082
Hipparcos
Catalog H HIP 106804 Proxy RAhms 21 37 56.03
DEdms +21 02 28.3 Vmag 8.17 VarFlag R Vmag H
RAdeg 324.483 DEdeg 21.0412 AstroRef Plx 8.13
CCDM N CCDM Nsys Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 205897 BD BD+20 4977
CD CP Dm number +20 4977 VIred 0.72
SpType G5 R SpType Coord arcsec 2000 213756.03+210228.3
Hipparcos 2
HIP 106804 Sn 5 So 0 Nc 1
RArad 5.6633048786 DErad 0.3672382423 Plx 8.92 PmRA 53.44
PmDE 80.07 E RArad 0.52 E DErad 0.46 E Plx 0.82
E pmRA 0.69 E pmDE 0.53 Hpmag 8.3028 E Hpmag 0.0013
SHp 0.015 VA 0 BV 0.647 E BV 0.011
VI 0.71
 
 
21379+2102 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 213756.03+210228.4 Mag 9 Calc delta mag 0.1
Calc coord yes