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Doubles in session


Current system
20511+5125
BU 155 AB
HD 198834


Nearby doubles
37' : 20487+5155
STF2732

41' : 20483+5054
ES 998

41' : 20496+5047
HDS2968

43' : 20472+5148
BU 365

51' : 20499+5036
CBL 87

61' : 20486+5029
BU 366AB

63' : 20574+5104
ES 999

66' : 20564+5044
BU 1137

67' : 20479+5224
ES 93

68' : 20457+5040
STT 412AB

79' : 20441+5043
LEP 171

79' : 20496+5008
ES 94AB

86' : 20449+5023
SKF2395

87' : 20429+5206
ES 995

87' : 20435+5217
TVB 6

91' : 20585+5028
STF2741AB

91' : 20465+5005
HDS2958

92' : 20570+5013
TDT2651

92' : 20466+5004
HDS2959

95' : 20460+5247
ES 996

99' : 20566+5250
A 1437

107' : 20422+5020
BU 675AB

107' : 20427+5238
A 1683

108' : 20457+4951
TDT2521

108' : 20444+5253
MLR 643

108' : 20595+5013
BU 68



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.

20511+5125 BU 155 AB (HD 198834)

 
 
20h 51m 05.41s +51° 25' 01.7" P.A. 40.00 sep 0.7 mag 7.36,8.13 Sp A9IV dist. 124.53 pc (406.22 l.y.)
 
 
Coord 2000 20511+5125 Discov num BU  155 Comp AB Coord arcsec 2000 20 51 05.41 +51 25 01.7
Date first 1873 Date last 2018 Obs 58
Pa first 40 Pa last 40.3 P.A. Now (θ) 40.3°
Sep first 0.6 Sep last 0.7 Sep. Now (ρ) 0.7"
Mag pri 7.36 Mag sec 8.13 delta mag (ΔM) 0.77 Spectral class A9IV (white)
Pri motion ra +040 Sec motion ra +040
Pri motion dec +041 Sec motion dec +041
Notes O (Orbital solution)
This double is physical.
 
 
20511+5125 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 198834 32933 20 51 05 +51 25 02 BU 155 AB 2018 58 40 0.7 7.36 8.13 0.77 Y <===
Show 32933 20 51 05 +51 25 02 BU 155 AC 2015 8 40 14.8 7.36 12.60 5.24
Show 32933 20 51 05 +51 25 02 BU 155 AD 2015 8 48 191.8 7.36 11.50 4.14
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 198834 Constellation Cygnus SAO 32933 HIP 102921
Tycho2 3587-01042-1 Gaia DR2 2169957120223515776 HD 198834 GC 29096
ADS 14370 BD BD+50 3215 Distance 124.53 Distance ly 406.22
 
 
ORBITAL ELEMENTS
 
 
Period (P)764.5978y± 417.622 Periastron (T)2041.9175y± 210.4531 Semi-major axis (a)0.99427a± 0.39382
Eccentricity (e)0.19114± 0.41488 Inclination (i)82.082°± 3.056 Longitude of periastron (ω)47.68°± 58.96
Node (Ω)34.391°± 4.976 Notes ReferenceIzm2019
Equinox Last observation2014 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 37.0 0.779
2001 37.1 0.776
2002 37.2 0.772
2003 37.3 0.768
2004 37.4 0.764
2005 37.6 0.760
2006 37.7 0.755
2007 37.8 0.751
2008 37.9 0.747
2009 38.0 0.742
2010 38.1 0.737
2011 38.2 0.733
2012 38.4 0.728
2013 38.5 0.723
2014 38.6 0.718
2015 38.7 0.713
2016 38.8 0.708
2017 39.0 0.703
2018 39.1 0.697
2019 39.2 0.692
2020 39.4 0.687
2021 39.5 0.681
2022 39.6 0.675
2023 39.8 0.670
2024 39.9 0.664
2025 40.1 0.658
2026 40.2 0.652
2027 40.4 0.646
2028 40.5 0.640
2029 40.7 0.634
2030 40.8 0.628


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


 
  


wds20511%2B5125a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20511+5125 BU 155 AB (HD 198834) : 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)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20511+5125 BU 155 AB 2005 56 38 0.7 7.36 8.13 A9IV D 205105.41+512501.7
20511+5125 BU 155 AB 2010 59 40 0.7 7.36 8.13 A9IV D 205105.41+512501.7
20511+5125 BU 155 AB 2011 60 39 0.7 7.36 8.13 A9IV 205105.41+512501.7
20511+5125 BU 155 AB 2013 54 38 0.7 7.36 8.13 A9IV 205105.41+512501.7
20511+5125 BU 155 AB 2014 55 38 0.7 7.36 8.13 A9IV 205105.41+512501.7
20511+5125 BU 155 AB 2016 56 42 0.7 7.36 8.13 A9IV 205105.41+512501.7
20511+5125 BU 155 AB 2018 57 41 0.7 7.36 8.13 A9IV 205105.41+512501.7

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

 
 
WDS 20511+5125 BU 155 AB (HD 198834) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20511+5125 BU 155 AB (HD 198834) : MEASURES
 
 
No records found.

 
 
WDS 20511+5125 (HD 198834) : VIRTUAL EYEPIECE
 
 

20511+5125 BU 155A mag 7.36 Sp A9IV 20511+5125 BU 155B sep 0.6 P.A. 27.90 mag 8.13 20511+5125 BU 155C sep 12.8 P.A. 27.60 mag 12.6 20511+5125 BU 155D sep 156.6 P.A. 34.30 mag 11.5 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 20511+5125 (HD 198834) : ALADIN DSS IMAGE @ 20h 51m 05.41s +51° 25' 01.7"
 
 
 
 
WDS 20511+5125 BU 155 AB (HD 198834) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20511+5125 BU 155AB distance=0' 20487+5155 STF2732 distance=37' 20483+5054 ES 998 distance=41' 20496+5047 HDS2968 distance=41' 20472+5148 BU 365 distance=43' 20499+5036 CBL 87 distance=51' 20486+5029 D 23CD distance=61' 20486+5029 BU 366AB distance=61' 20486+5029 BU 366AC distance=61' 20574+5104 ES 999 distance=63' 20564+5044 BU 1137 distance=66' 20479+5224 ES 93 distance=67' 20457+5040 STT 412AB distance=68' 20457+5040 STT 412AC distance=68' 20457+5040 STT 412BC distance=68' 20496+5008 ES 94BC distance=77' 20441+5043 LEP 171 distance=79' 20496+5008 ES 94AB distance=79' 20496+5008 GUI 34AD distance=79' 20449+5023 SKF2395 distance=86' 20429+5206 ES 995 distance=87' 20435+5217 TVB 6 distance=87' 20585+5028 BU 9007CD distance=89' 20585+5028 STF2741AB distance=91' 20585+5028 STF2741AC distance=91' 20465+5005 HDS2958 distance=91' 20570+5013 TDT2651 distance=92' 20466+5004 HDS2959 distance=92' 20460+5247 ES 996 distance=95' 20566+5250 A 1437 distance=99' 20422+5020 BU 675AB distance=107' 20422+5020 BU 675AC distance=107' 20422+5020 BU 675AD distance=107' 20422+5020 BU 675AE distance=107' 20427+5238 A 1683 distance=107' 20457+4951 TDT2521 distance=108' 20444+5253 MLR 643 distance=108' 20595+5013 BU 68 distance=108' 20405+5217 TDT2463 distance=111' 20421+5013 ES 91AB distance=112' 20421+5013 ES 91AC distance=112' 20421+5013 ES 91BC distance=112' 21028+5041 ES 1000AB distance=120' 20397+5227 ES 992 distance=123' 20521+4923 ES 811 distance=124' 20572+4936 KPP1431 distance=124' 20593+5303 JNN 287 distance=124' 20379+5144 OSO 128AB distance=125' 20379+5144 OSO 128AC distance=125' 20379+5106 KPP4397BC distance=125' 20379+5106 ES 88AB distance=126' 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 20511+5125 BU 155 AB 40 0.7
Show 20511+5125 BU 155 AC 40 14.8
Show 20511+5125 BU 155 AD 48 191.8
Show 20487+5155 STF2732 73 4.3 37
Show 20483+5054 ES 998 176 3.2 41
Show 20496+5047 HDS2968 69 0.3 41
Show 20472+5148 BU 365 288 17.2 43
Show 20499+5036 CBL 87 2 25.0 51
Show 20486+5029 D 23 CD 5 1.7 61
Show 20486+5029 BU 366 AB 130 1.5 61
Show 20486+5029 BU 366 AC 105 51.1 61
Show 20574+5104 ES 999 262 3.2 63
Show 20564+5044 BU 1137 350 7.4 66
Show 20479+5224 ES 93 321 26.0 67
Show 20457+5040 STT 412 AB 279 26.0 68
Show 20457+5040 STT 412 AC 268 26.2 68
Show 20457+5040 STT 412 BC 186 5.0 68
Show 20496+5008 ES 94 BC 79 2.5 77
Show 20441+5043 LEP 171 172 4.4 79
Show 20496+5008 ES 94 AB 15 102.7 79
Show 20496+5008 GUI 34 AD 58 86.9 79
Show 20449+5023 SKF2395 204 4.1 86
Show 20429+5206 ES 995 107 8.6 87
Show 20435+5217 TVB 6 318 11.7 87
Show 20585+5028 BU 9007 CD 50 13.3 89
Show 20585+5028 STF2741 AB 24 2.0 91
Show 20585+5028 STF2741 AC 355 138.6 91
Show 20465+5005 HDS2958 334 0.1 91
Show 20570+5013 TDT2651 209 1.9 92
Show 20466+5004 HDS2959 21 0.5 92
Show 20460+5247 ES 996 264 8.8 95
Show 20566+5250 A 1437 331 1.4 99
Show 20422+5020 BU 675 AB 102 3.3 107
Show 20422+5020 BU 675 AC 185 28.8 107
Show 20422+5020 BU 675 AD 329 33.3 107
Show 20422+5020 BU 675 AE 240 72.0 107
Show 20427+5238 A 1683 209 0.1 107
Show 20457+4951 TDT2521 236 0.3 108
Show 20444+5253 MLR 643 127 0.3 108
Show 20595+5013 BU 68 149 2.0 108
Show 20405+5217 TDT2463 180 2.4 111
Show 20421+5013 ES 91 AB 189 4.6 112
Show 20421+5013 ES 91 AC 235 17.6 112
Show 20421+5013 ES 91 BC 247 14.8 112
Show 21028+5041 ES 1000 AB 56 3.5 120
Show 20397+5227 ES 992 166 7.3 123
Show 20521+4923 ES 811 158 1.4 124
Show 20572+4936 KPP1431 57 10.7 124
Show 20593+5303 JNN 287 11 0.5 124
Show 20379+5144 OSO 128 AB 58 8.9 125
Show 20379+5144 OSO 128 AC 157 21.3 125

 
 
WDS 20511+5125 : COMPONENTS
 
 
  A B C
B pa=27.9°
sep=0.60"
 
C pa=27.6°
sep=12.76"
pa=27.6°
sep=12.16"
 
D pa=34.3°
sep=156.57"
pa=34.4°
sep=155.97"
pa=34.9°
sep=143.90"
 
 
20511+5125 A
 
 
Name HD 198834 Coord arcsec 2000 205105.41+512501.7 Mag 7.36 Spectral class A9IV (white)
PmRA 40.00 PmDE 41.0 SAO 32933 HIP 102921
Tycho2 3587-01042-1 HD 198834 GC 29096 BD BD+50 3215
Tycho2
Tycho2 3587-01042-1 Pflag P RAmdeg 312.77275405 DEmdeg 51.41728332
PmRA 39.5 PmDE 40.6 E RAmdeg 5 E DEmdeg 5
E pmRA 1.4 E pmDE 1.5 EpRAm 1991.38 EpDEm 1991.51
Num 8 Q RAmdeg 1.4 Q DEmdeg 1.4 Q pmRA 1.4
Q pmDE 1.3 BTmag 7.625 E BTmag 0.015 VTmag 7.356
E VTmag 0.011 Prox 8 TYC T HIP 102921
CCDM A RAdeg 312.77256056 DEdeg 51.41715250 EpRA 1990 1.59
EpDE 1990 1.69 E RAdeg 4.5 E DEdeg 4.6 Posflg D
Corr 0.0
SAO
SAO 32933 DelFlag RA1950 PmRA1950 0.0034
DE1950 PmDE1950 0.051 Vmag 6.8 SpType F0
Double code Source 70 CatNum 29096 DM BD+50 3215
DMcomp BDsup HD 198834 M HD 0
GC 29096 RA1950rad 5.45218178 DE1950rad 0.89410506 PmRA2000 0.0038
PmDE2000 0.049
Hipparcos
Catalog H HIP 102921 Proxy H RAhms 20 51 05.41
DEdms +51 25 01.7 Vmag 6.91 VarFlag R Vmag G
RAdeg 312.773 DEdeg 51.4171 AstroRef A Plx 8.27
CCDM 20512+5126 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 38 Rho 0.81 HD 198834 BD BD+50 3215
CD CP Dm number +50 3215 VIred 0.35
SpType F0 R SpType Coord arcsec 2000 205105.41+512501.7
Hipparcos 2
HIP 102921 Sn 15 So 3 Nc 2
RArad 5.4589107484 DErad 0.8973984518 Plx 8.03 PmRA 38.96
PmDE 42.33 E RArad 0.61 E DErad 0.72 E Plx 0.71
E pmRA 0.76 E pmDE 0.8 Hpmag 6.9766 E Hpmag 0.0009
SHp 0.008 VA 0 BV 0.303 E BV 0.015
VI 0.35
 
 
20511+5125 B
 
 
Coord arcsec 2000 205105.44+512502.2 Mag 8.13 PmRA 40.00 PmDE 41.0
Tycho2 3587-01042-2 Calc delta mag 0.77 Calc coord yes
Tycho2
Tycho2 3587-01042-2 Pflag P RAmdeg 312.77275405 DEmdeg 51.41728332
PmRA 39.5 PmDE 40.6 E RAmdeg 5 E DEmdeg 5
E pmRA 1.4 E pmDE 1.5 EpRAm 1991.38 EpDEm 1991.51
Num 8 Q RAmdeg 1.4 Q DEmdeg 1.4 Q pmRA 1.4
Q pmDE 1.3 BTmag 8.575 E BTmag 0.018 VTmag 8.131
E VTmag 0.013 Prox 8 TYC T HIP 102921
CCDM B RAdeg 312.77277944 DEdeg 51.41732944 EpRA 1990 1.60
EpDE 1990 1.67 E RAdeg 6.5 E DEdeg 6.7 Posflg D
Corr 0.0
 
 
20511+5125 C
 
 
Coord arcsec 2000 205106.04+512513.0 Mag 12.6 Calc delta mag 5.24 Calc coord yes
 
 
20511+5125 D
 
 
Coord arcsec 2000 205114.85+512711.0 Mag 11.5 PmRA -2.00 PmDE -5.0
Calc delta mag 4.14 Calc coord yes