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Doubles in session


Current system
20423+5723
BU 152
HD 197618


Nearby doubles
9' : 20416+5730
LDS1476AB

26' : 20412+5659
HJ 1570AB

28' : 20454+5735
ENG 76AB

41' : 20400+5647
OSW 78

58' : 20354+5712
TDT2399

58' : 20381+5637
A 745

59' : 20495+5728
MLB 86

64' : 20383+5629
FOX 38

64' : 20389+5820
TDT2449

67' : 20343+5707
STI2541

68' : 20500+5751
CVR 232

70' : 20404+5615
OSW 73

70' : 20356+5808
A 741AB

72' : 20483+5815
MLR 360

72' : 20424+5611
VKI 47

73' : 20470+5825
HDS2961

75' : 20443+5610
A 1684

77' : 20330+5712
A 739

78' : 20422+5606
OSW 74

83' : 20351+5624
HJ 1551

85' : 20352+5622
HJ 1552

85' : 20398+5844
MLB 85

87' : 20472+5607
KR 52

90' : 20342+5622
HJ 1546

91' : 20312+5714
A 872

92' : 20562+5742
HJ 1595



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.

20423+5723 BU 152 (HD 197618)

 
 
20h 42m 16.81s +57° 23' 07.4" P.A. 82.00 sep 1.2 mag 7.21,8.80 Sp A4IV dist. 152.44 pc (497.26 l.y.)
 
 
Coord 2000 20423+5723 Discov num BU  152 Comp Coord arcsec 2000 20 42 16.81 +57 23 07.4
Date first 1873 Date last 2016 Obs 63
Pa first 130 Pa last 82.2 P.A. Now (θ) 82.2°
Sep first 0.4 Sep last 1.233 Sep. Now (ρ) 1.233"
Mag pri 7.21 Mag sec 8.80 delta mag (ΔM) 1.59 Spectral class A4IV (white)
Pri motion ra -006 Sec motion ra -006
Pri motion dec +005 Sec motion dec +005
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197618 Constellation Cepheus SAO 32812 HIP 102183
Tycho2 3959-01153-1 Gaia DR2 2187250513975684224 HD 197618 GC 28872
ADS 14196 BD BD+56 2474 Distance 152.44 Distance ly 497.26
 
 
ORBITAL ELEMENTS
 
 
Period (P)737.3089y± 353.7497 Periastron (T)1811.6742y± 81.8172 Semi-major axis (a)1.02596a± 0.34006
Eccentricity (e)0.32296± 0.42968 Inclination (i)109.39°± 9.086 Longitude of periastron (ω)234.888°± 90.989
Node (Ω)84.418°± 10.233 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 84.0 1.136
2001 83.9 1.138
2002 83.8 1.140
2003 83.7 1.142
2004 83.5 1.144
2005 83.4 1.146
2006 83.3 1.148
2007 83.2 1.150
2008 83.0 1.152
2009 82.9 1.154
2010 82.8 1.156
2011 82.7 1.158
2012 82.6 1.159
2013 82.4 1.161
2014 82.3 1.162
2015 82.2 1.164
2016 82.1 1.165
2017 82.0 1.167
2018 81.8 1.168
2019 81.7 1.169
2020 81.6 1.170
2021 81.5 1.172
2022 81.4 1.173
2023 81.3 1.174
2024 81.1 1.175
2025 81.0 1.176
2026 80.9 1.177
2027 80.8 1.178
2028 80.7 1.179
2029 80.6 1.179
2030 80.4 1.180


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


 
  


wds20423%2B5723a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20423+5723 BU 152 (HD 197618) : 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
20423+5723 BU 152 2005 63 83 1.1 7.21 8.80 A4IV D 204216.81+572307.4
20423+5723 BU 152 2007 65 82 1.2 7.21 8.80 A4IV D 204216.81+572307.4
20423+5723 BU 152 2009 66 82 1.2 7.21 8.80 A4IV D 204216.81+572307.4
20423+5723 BU 152 2011 68 83 1.1 7.21 8.80 A4IV D 204216.81+572307.4
20423+5723 BU 152 2014 61 82 1.2 7.21 8.80 A4IV 204216.81+572307.4
20423+5723 BU 152 2016 62 82 1.2 7.21 8.80 A4IV 204216.81+572307.4

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

 
 
WDS 20423+5723 BU 152 (HD 197618) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20423+5723 BU 152 (HD 197618) : MEASURES
 
 
No records found.

 
 
WDS 20423+5723 (HD 197618) : VIRTUAL EYEPIECE
 
 

20423+5723 BU 152A mag 7.21 Sp A4IV 20423+5723 BU 152B sep 0.7 P.A. 75.70 mag 8.8 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 20423+5723 (HD 197618) : ALADIN DSS IMAGE @ 20h 42m 16.81s +57° 23' 07.4"
 
 
 
 
WDS 20423+5723 BU 152 (HD 197618) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20423+5723 BU 152 distance=0' 20416+5730 LDS1476AB distance=9' 20416+5730 OSO 130AC distance=9' 20412+5659 HJ 1570AB distance=26' 20412+5659 VBS 32AC distance=26' 20454+5735 CIA 1Aa,Ab distance=28' 20454+5735 ENG 76AB distance=28' 20400+5647 OSW 78 distance=41' 20354+5712 TDT2399 distance=58' 20381+5637 A 745 distance=58' 20495+5728 MLB 86 distance=59' 20383+5629 FOX 38 distance=64' 20389+5820 TDT2449 distance=64' 20343+5707 STI2541 distance=67' 20500+5751 CVR 232 distance=68' 20404+5615 OSW 73 distance=70' 20356+5808 A 741AB distance=70' 20356+5808 A 741AC distance=70' 20483+5815 MLR 360 distance=72' 20424+5611 VKI 47 distance=72' 20470+5825 HDS2961 distance=73' 20443+5610 A 1684 distance=75' 20330+5712 A 739 distance=77' 20422+5606 OSW 74 distance=78' 20351+5624 HJ 1551 distance=83' 20352+5622 HJ 1552 distance=85' 20398+5844 MLB 85 distance=85' 20472+5607 KR 52 distance=87' 20342+5622 HJ 1546 distance=90' 20312+5714 A 872 distance=91' 20562+5742 HJ 1595 distance=92' 20538+5739 OSW 76 distance=94' 20309+5747 TDT2333 distance=95' 20312+5653 RAO 22 distance=95' 20540+5711 ES 135AB distance=96' 20540+5711 ES 135AC distance=96' 20337+5616 HJ 1545 distance=97' 20406+5858 HJ 1569 distance=97' 20365+5557 VBS 30AB distance=99' 20365+5557 HJ 1556AC distance=99' 20365+5557 VBS 30AD distance=99' 20493+5845 STTA211 distance=100' 20475+5553 HJ 1580 distance=100' 20444+5902 KR 51 distance=101' 20305+5651 TDT2330 distance=101' 20311+5814 LDS1474 distance=104' 20298+5654 TDT2322 distance=106' 20454+5906 ES 2700 distance=106' 20306+5817 LDS1473 distance=108' 20553+5651 A 752 distance=111' 20289+5655 STI2535AB distance=113' 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 20423+5723 BU 152 82 1.2
Show 20416+5730 LDS1476 AB 267 11.6 9
Show 20416+5730 OSO 130 AC 233 23.6 9
Show 20412+5659 HJ 1570 AB 79 14.0 26
Show 20412+5659 VBS 32 AC 345 15.4 26
Show 20454+5735 CIA 1 Aa,Ab 105 0.1 28
Show 20454+5735 ENG 76 AB 146 48.4 28
Show 20400+5647 OSW 78 233 186.1 41
Show 20354+5712 TDT2399 4 0.5 58
Show 20381+5637 A 745 313 2.4 58
Show 20495+5728 MLB 86 149 4.6 59
Show 20383+5629 FOX 38 301 5.4 64
Show 20389+5820 TDT2449 91 0.7 64
Show 20343+5707 STI2541 205 10.6 67
Show 20500+5751 CVR 232 319 112.1 68
Show 20404+5615 OSW 73 250 188.6 70
Show 20356+5808 A 741 AB 157 1.3 70
Show 20356+5808 A 741 AC 211 19.8 70
Show 20483+5815 MLR 360 295 0.2 72
Show 20424+5611 VKI 47 340 2.3 72
Show 20470+5825 HDS2961 39 0.1 73
Show 20443+5610 A 1684 141 2.1 75
Show 20330+5712 A 739 195 4.6 77
Show 20422+5606 OSW 74 88 127.2 78
Show 20351+5624 HJ 1551 225 42.2 83
Show 20352+5622 HJ 1552 234 21.3 85
Show 20398+5844 MLB 85 134 6.2 85
Show 20472+5607 KR 52 64 4.6 87
Show 20342+5622 HJ 1546 246 17.4 90
Show 20312+5714 A 872 178 0.2 91
Show 20562+5742 HJ 1595 313 11.6 92
Show 20538+5739 OSW 76 326 145.5 94
Show 20309+5747 TDT2333 138 2.4 95
Show 20312+5653 RAO 22 152 0.2 95
Show 20540+5711 ES 135 AB 199 7.1 96
Show 20540+5711 ES 135 AC 115 71.7 96
Show 20337+5616 HJ 1545 180 15.5 97
Show 20406+5858 HJ 1569 306 3.9 97
Show 20365+5557 VBS 30 AB 141 4.6 99
Show 20365+5557 HJ 1556 AC 222 6.6 99
Show 20365+5557 VBS 30 AD 97 29.6 99
Show 20493+5845 STTA211 268 94.9 100
Show 20475+5553 HJ 1580 245 10.9 100
Show 20444+5902 KR 51 181 1.4 101
Show 20305+5651 TDT2330 63 0.6 101
Show 20311+5814 LDS1474 209 10.2 104
Show 20298+5654 TDT2322 20 1.7 106
Show 20454+5906 ES 2700 297 15.5 106
Show 20306+5817 LDS1473 219 63.9 108
Show 20553+5651 A 752 8 1.2 111
Show 20289+5655 STI2535 AB 227 13.6 113

 
 
WDS 20423+5723 : COMPONENTS
 
 
  A
B pa=75.7°
sep=0.68"
 
 
20423+5723 A
 
 
Componente originario normalizzato AB Name HD 197618 Coord arcsec 2000 204216.81+572307.4 Mag 7.21
Spectral class A4IV (white) PmRA -6.00 PmDE 5.0 SAO 32812
HIP 102183 Tycho2 3959-01153-1 HD 197618 GC 28872
BD BD+56 2474
Tycho2
Tycho2 3959-01153-1 Pflag P RAmdeg 310.57002562 DEmdeg 57.38537556
PmRA -5.7 PmDE 5.4 E RAmdeg 4 E DEmdeg 4
E pmRA 1.6 E pmDE 1.7 EpRAm 1991.50 EpDEm 1991.51
Num 7 Q RAmdeg 1.0 Q DEmdeg 0.5 Q pmRA 1.1
Q pmDE 0.5 BTmag 7.336 E BTmag 0.015 VTmag 7.210
E VTmag 0.010 Prox 11 TYC T HIP 102183
CCDM A RAdeg 310.57000444 DEdeg 57.38536139 EpRA 1990 1.61
EpDE 1990 1.61 E RAdeg 4.2 E DEdeg 4.2 Posflg D
Corr 0.0
SAO
SAO 32812 DelFlag RA1950 PmRA1950 -0.0015
DE1950 PmDE1950 -0.01 Vmag 6.9 SpType A3
Double code Source 70 CatNum 28872 DM BD+56 2474
DMcomp BDsup HD 197618 M HD 0
GC 28872 RA1950rad 5.41504603 DE1950rad 0.99840701 PmRA2000 -0.0011
PmDE2000 -0.013
Hipparcos
Catalog H HIP 102183 Proxy H RAhms 20 42 16.80
DEdms +57 23 07.3 Vmag 6.99 VarFlag R Vmag H
RAdeg 310.57 DEdeg 57.3854 AstroRef A Plx 6.84
CCDM 20423+5723 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 86 Rho 1.118 HD 197618 BD BD+56 2474
CD CP Dm number +56 2474 VIred 0.14
SpType A3 R SpType Coord arcsec 2000 204216.80+572307.3
Hipparcos 2
HIP 102183 Sn 15 So 3 Nc 2
RArad 5.4204691484 DErad 1.0015634672 Plx 6.56 PmRA -4.75
PmDE 5.45 E RArad 0.41 E DErad 0.49 E Plx 0.51
E pmRA 0.44 E pmDE 0.59 Hpmag 7.0325 E Hpmag 0.0011
SHp 0.009 VA 0 BV 0.3 E BV 0.495
VI 0.14
CCDM
Ccdm 20423+5723 RComp Comp A Note1
Note2 Discov num DRAs -1.23 DDEs 6.5
R dRAs 12 Year Theta Rho
Obs 2 Vmag 7.3 Sp A3 PmNote
PmRA 27 PmDE 0 Dm number +56 2474 Cat1 BD
Name2 +57 1388 Cat2 AGK2/3 HD 197618 M HD
ADS BDS A14196 M ADS BDS N IDS IDS 20398N5702A
HIC 102183
 
 
20423+5723 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204216.89+572307.6 Mag 8.8 PmRA -6.00
PmDE 5.0 Tycho2 3959-01153-2 Calc delta mag 1.59 Calc coord yes
Tycho2
Tycho2 3959-01153-2 Pflag P RAmdeg 310.57002562 DEmdeg 57.38537556
PmRA -5.7 PmDE 5.4 E RAmdeg 4 E DEmdeg 4
E pmRA 1.6 E pmDE 1.7 EpRAm 1991.50 EpDEm 1991.51
Num 7 Q RAmdeg 1.0 Q DEmdeg 0.5 Q pmRA 1.1
Q pmDE 0.5 BTmag 9.356 E BTmag 0.021 VTmag 8.804
E VTmag 0.015 Prox 11 TYC HIP 102183
CCDM B RAdeg 310.57058083 DEdeg 57.38538250 EpRA 1990 1.62
EpDE 1990 1.61 E RAdeg 9.3 E DEdeg 9.6 Posflg D
Corr 0.0
CCDM
Ccdm 20423+5723 RComp Comp B Note1
Note2 Discov num BU 152 DRAs DDEs
R dRAs Year 1957 Theta 092 Rho 1.0
Obs 30 Vmag 8.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14196 M ADS BDS N IDS IDS 20398N5702B
HIC 102183