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Doubles in session


Current system
21008-0821
BU 678 AB
HD 199976


Nearby doubles
25' : 20593-0812
AHD 31

26' : 20595-0804
RST3275

51' : 21042-0811
TDT2725

58' : 20581-0902
ELP 46

68' : 20588-0921
BU 764AB

71' : 21042-0911
AOT 102

77' : 21008-0704
UC 4361

78' : 21054-0744
RST4691

82' : 21032-0935
AOT 99

84' : 21023-0941
HJ 929

85' : 21011-0657
WAA 49

89' : 20599-0653
UC 4355

89' : 21065-0753
TDT2752

91' : 20594-0652
SKF1773

95' : 21029-0950
AOT 98

99' : 21074-0814
BU 368AB

99' : 21074-0810
HDS3010

100' : 21005-0642
CVR 881

100' : 20569-0942
BU 1034AB

101' : 21071-0858
J 1782

104' : 21078-0826
RST4074

107' : 21034-1000
AOT 100

115' : 21027-1012
AOT 97

116' : 21027-0629
UC 4364

119' : 21069-0937
TDT2762

120' : 21036-1012
AOT 101



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.

21008-0821 BU 678 AB (HD 199976)

 
 
21h 00m 49.02s -08° 20' 34.3" P.A. 260.00 sep 2.8 mag 8.20,11.26 Sp G0 dist. 34.38 pc (112.15 l.y.)
 
 
Coord 2000 21008-0821 Discov num BU  678 Comp AB Coord arcsec 2000 21 00 49.02 -08 20 34.3
Date first 1877 Date last 2016 Obs 27
Pa first 182 Pa last 260.2 P.A. Now (θ) 260.2°
Sep first 2.2 Sep last 2.847 Sep. Now (ρ) 2.847"
Mag pri 8.20 Mag sec 11.26 delta mag (ΔM) 3.06 Spectral class G0 (yellow)
Pri motion ra +243 Sec motion ra +239
Pri motion dec +030 Sec motion dec +027
Notes O (Orbital solution)
rPM=0.02 (< 0.3, Physical double)
This double is physical.
 
 
21008-0821 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 199976 145026 21 00 49 -08 20 34 BU 678 AB 2016 27 260 2.8 8.20 11.26 3.06 Y <===
Show 145026 21 00 49 -08 20 34 FOX 255 AC 2000 3 251 71.0 8.20 13.50 5.30
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 199976 Constellation Aquarius SAO 145026 HIP 103699
Tycho2 5770-00692-1 Gaia DR2 6908757299969652480 HD 199976 ADS 14528
BD BD-08 5544 Distance 34.38 Distance ly 112.15
 
 
ORBITAL ELEMENTS
 
 
Period (P)837.9275y± 406.6674 Periastron (T)1850.9234y± 10.5379 Semi-major axis (a)9.37004a± 6.26094
Eccentricity (e)0.90786± 0.08214 Inclination (i)77.618°± 8.232 Longitude of periastron (ω)285.592°± 10.83
Node (Ω)168.607°± 4.294 Notes ReferenceIzm2019
Equinox Last observation2014 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 253.0 2.711
2001 253.5 2.718
2002 253.9 2.726
2003 254.4 2.734
2004 254.8 2.742
2005 255.3 2.750
2006 255.7 2.758
2007 256.2 2.766
2008 256.6 2.774
2009 257.0 2.782
2010 257.5 2.791
2011 257.9 2.799
2012 258.3 2.808
2013 258.8 2.817
2014 259.2 2.826
2015 259.6 2.835
2016 260.0 2.844
2017 260.5 2.853
2018 260.9 2.862
2019 261.3 2.871
2020 261.7 2.881
2021 262.1 2.890
2022 262.5 2.900
2023 262.9 2.910
2024 263.3 2.919
2025 263.7 2.929
2026 264.1 2.939
2027 264.5 2.949
2028 264.9 2.959
2029 265.3 2.970
2030 265.7 2.980


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


 
  


wds21008-0821b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21008-0821 BU 678 AB (HD 199976) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 FOX Fox, P.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21008-0821 BU 678 AB 2005 21 256 2.7 8.20 11.26 G0 O 210048.88-082034.6
21008-0821 BU 678 AB 2012 23 258 2.7 8.20 11.26 G0 O 210048.88-082034.6
21008-0821 BU 678 AB 2014 25 259 2.8 8.20 11.26 G0 O 210048.88-082034.6
21008-0821 BU 678 AB 2015 26 260 2.8 8.20 11.26 G0 O 210049.02-082034.3
21008-0821 BU 678 AB 2016 27 260 2.8 8.20 11.26 G0 O 210049.02-082034.3

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

 
 
WDS 21008-0821 BU 678 AB (HD 199976) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21008-0821 BU 678 AB (HD 199976) : MEASURES
 
 
No records found.

 
 
WDS 21008-0821 (HD 199976) : VIRTUAL EYEPIECE
 
 

21008-0821 BU 678A mag 8.2 Sp G0 21008-0821 BU 678B sep 2.8 P.A. 260.10 mag 11.26 21008-0821 FOX 255C sep 70.3 P.A. 250.30 mag 13.5 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 21008-0821 (HD 199976) : ALADIN DSS IMAGE @ 21h 00m 49.02s -08° 20' 34.3"
 
 
 
 
WDS 21008-0821 BU 678 AB (HD 199976) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21008-0821 BU 678AB distance=1' 21008-0821 FOX 255AC distance=1' 20593-0812 AHD 31 distance=25' 20595-0804 RST3275 distance=26' 21042-0811 TDT2725 distance=51' 20581-0902 ELP 46 distance=58' 20588-0921 BOO 1DF distance=65' 20588-0921 BU 764DE distance=65' 20588-0921 BU 764CE distance=68' 20588-0921 BU 764AB distance=68' 20588-0921 BU 764AB,E distance=68' 20588-0921 BU 764AB,C distance=68' 20588-0921 BU 764AB,D distance=68' 21042-0911 AOT 102 distance=71' 21008-0704 UC 4361 distance=77' 21054-0744 RST4691 distance=78' 21032-0935 AOT 99 distance=82' 21023-0941 HJ 929 distance=84' 21011-0657 WAA 49 distance=85' 20599-0653 UC 4355 distance=89' 21065-0753 TDT2752 distance=89' 20594-0652 SKF1773 distance=91' 21029-0950 AOT 98 distance=95' 21074-0814 BU 368AB distance=99' 21074-0814 BU 368AC distance=99' 21074-0814 POP 227AB,E distance=99' 21074-0810 HDS3010 distance=99' 21074-0814 BU 368CD distance=99' 21005-0642 CVR 881 distance=100' 20569-0942 BU 1034AB distance=100' 20569-0942 BU 1034AC distance=100' 21071-0858 J 1782 distance=101' 21078-0826 RST4074 distance=104' 21034-1000 AOT 100 distance=107' 21027-1012 AOT 97 distance=115' 21027-0629 UC 4364 distance=116' 21069-0937 TDT2762 distance=119' 21036-1012 AOT 101 distance=120' 20590-1017 RST4071 distance=120' 21079-0725 KPP2183 distance=120' 21082-0916 UC 4387 distance=123' 21052-1004 AOT 104 distance=123' 20589-1020 GWP3024 distance=123' 21092-0814 JNN 128 distance=126' 20534-0719 RST4685 distance=126' 20531-0728 BRT 556 distance=127' 20527-0859 MCA 64Aa,Ab distance=128' 20527-0859 TOK 342AB distance=128' 21017-1032 AOT 96 distance=133' 21050-1020 AOT 103 distance=135' 21032-0610 RST4689 distance=136' 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 21008-0821 BU 678 AB 260 2.8 1
Show 21008-0821 FOX 255 AC 251 71.0 1
Show 20593-0812 AHD 31 161 10.6 25
Show 20595-0804 RST3275 5 1.9 26
Show 21042-0811 TDT2725 74 0.4 51
Show 20581-0902 ELP 46 316 11.5 58
Show 20588-0921 BOO 1 DF 195 18.3 65
Show 20588-0921 BU 764 DE 177 124.3 65
Show 20588-0921 BU 764 CE 312 57.3 68
Show 20588-0921 BU 764 AB 1 0.7 68
Show 20588-0921 BU 764 AB,E 86 54.5 68
Show 20588-0921 BU 764 AB,C 110 102.8 68
Show 20588-0921 BU 764 AB,D 21 136.2 68
Show 21042-0911 AOT 102 113 14.6 71
Show 21008-0704 UC 4361 52 39.2 77
Show 21054-0744 RST4691 71 0.5 78
Show 21032-0935 AOT 99 116 7.4 82
Show 21023-0941 HJ 929 2 23.9 84
Show 21011-0657 WAA 49 171 6.1 85
Show 20599-0653 UC 4355 21 32.1 89
Show 21065-0753 TDT2752 79 0.5 89
Show 20594-0652 SKF1773 31 1.7 91
Show 21029-0950 AOT 98 276 15.7 95
Show 21074-0814 BU 368 AB 312 0.0 99
Show 21074-0814 BU 368 AC 39 15.6 99
Show 21074-0814 POP 227 AB,E 117 51.3 99
Show 21074-0810 HDS3010 31 0.9 99
Show 21074-0814 BU 368 CD 298 6.0 99
Show 21005-0642 CVR 881 127 11.1 100
Show 20569-0942 BU 1034 AB 166 2.2 100
Show 20569-0942 BU 1034 AC 66 177.8 100
Show 21071-0858 J 1782 193 5.1 101
Show 21078-0826 RST4074 28 1.8 104
Show 21034-1000 AOT 100 146 21.2 107
Show 21027-1012 AOT 97 4 13.1 115
Show 21027-0629 UC 4364 165 27.0 116
Show 21069-0937 TDT2762 94 0.8 119
Show 21036-1012 AOT 101 139 14.6 120
Show 20590-1017 RST4071 158 1.8 120
Show 21079-0725 KPP2183 190 17.9 120
Show 21082-0916 UC 4387 14 16.0 123
Show 21052-1004 AOT 104 174 7.6 123
Show 20589-1020 GWP3024 221 182.1 123
Show 21092-0814 JNN 128 121 0.9 126
Show 20534-0719 RST4685 81 2.1 126
Show 20531-0728 BRT 556 109 2.5 127
Show 20527-0859 MCA 64 Aa,Ab 127 0.0 128
Show 20527-0859 TOK 342 AB 114 503.2 128
Show 21017-1032 AOT 96 104 10.9 133
Show 21050-1020 AOT 103 224 21.6 135
Show 21032-0610 RST4689 84 0.8 136

 
 
WDS 21008-0821 : COMPONENTS
 
 
  A B
B pa=260.1°
sep=2.82"
 
C pa=250.3°
sep=70.30"
pa=249.9°
sep=67.53"
 
 
21008-0821 A
 
 
Name HD 199976 Coord arcsec 2000 210049.02-082034.3 Mag 8.2 Spectral class G0 (yellow)
PmRA 243.00 PmDE 30.0 SAO 145026 HIP 103699
Tycho2 5770-00692-1 HD 199976 BD BD-08 5544
Tycho2
Tycho2 5770-00692-1 Pflag RAmdeg 315.20423935 DEmdeg -8.34285544
PmRA 239.4 PmDE 32.4 E RAmdeg 7 E DEmdeg 8
E pmRA 2.0 E pmDE 2.1 EpRAm 1991.42 EpDEm 1991.26
Num 3 Q RAmdeg 0.3 Q DEmdeg 0.5 Q pmRA 0.2
Q pmDE 0.5 BTmag 8.983 E BTmag 0.019 VTmag 8.198
E VTmag 0.014 Prox 27 TYC T HIP 103699
CCDM A RAdeg 315.20367139 DEdeg -8.34293278 EpRA 1990 1.55
EpDE 1990 1.42 E RAdeg 7.0 E DEdeg 8.0 Posflg
Corr -0.3
SAO
SAO 145026 DelFlag RA1950 PmRA1950 0.016
DE1950 PmDE1950 0.035 Vmag 8.1 SpType G0
Double code Source 26 CatNum 7538 DM BD-08 5544
DMcomp BDsup HD 199976 M HD 0
GC RA1950rad 5.48959766 DE1950rad -0.14904551 PmRA2000 0.0162
PmDE2000 0.034
Hipparcos
Catalog H HIP 103699 Proxy H RAhms 21 00 48.88
DEdms -08 20 34.6 Vmag 8.02 VarFlag R Vmag G
RAdeg 315.204 DEdeg -8.34293 AstroRef A Plx 29.84
CCDM 21008-0821 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 249 Rho 2.682 HD 199976 BD BD-08 5544
CD CP Dm number -08 5544 VIred 0.79
SpType G0 R SpType Coord arcsec 2000 210048.88-082034.6
Hipparcos 2
HIP 103699 Sn 15 So 3 Nc 2
RArad 5.5013415292 DErad -0.1456116795 Plx 29.09 PmRA 239.82
PmDE 26.47 E RArad 0.95 E DErad 0.7 E Plx 1.1
E pmRA 1.39 E pmDE 1 Hpmag 8.1656 E Hpmag 0.0024
SHp 0.015 VA 0 BV 0.747 E BV 0.002
VI 0.79
CCDM
Ccdm 21008-0821 RComp Comp A Note1
Note2 Discov num DRAs 1.01 DDEs 26.0
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.2 Sp G0 PmNote *
PmRA 237 PmDE 35 Dm number -08 5544 Cat1 BD
Name2 145026 Cat2 SAO HD 199976 M HD
ADS BDS A14528 M ADS BDS N IDS IDS 20554S0844A
HIC 103699
 
 
21008-0821 B
 
 
Coord arcsec 2000 210048.83-082034.8 Mag 11.26 PmRA 239.00 PmDE 27.0
Calc delta mag 3.06 Calc coord yes
CCDM
Ccdm 21008-0821 RComp Comp B Note1
Note2 Discov num BU 678 DRAs DDEs
R dRAs Year 1958 Theta 232 Rho 2.5
Obs 11 Vmag 11.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14528 M ADS BDS N IDS IDS 20554S0844B
HIC 103699
 
 
21008-0821 C
 
 
Coord arcsec 2000 210044.56-082058.0 Mag 13.5 PmRA -3.00 PmDE -2.0
Calc delta mag 5.3 Calc coord yes
CCDM
Ccdm 21008-0821 RComp Comp C Note1
Note2 Discov num FOX DRAs DDEs
R dRAs Year 1913 Theta 244 Rho 50.0
Obs 1 Vmag 13.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14528 M ADS BDS N IDS IDS 20554S0844C
HIC