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Doubles in session


Current system
20530+4258
COU 2542


Nearby doubles
16' : 20519+4309
GRV 389

17' : 20524+4314
LDS2462

24' : 20517+4317
LDS2461

28' : 20513+4238
A 614

30' : 20535+4328
LDS2465

32' : 20508+4238
LDS2457

34' : 20556+4243
BRT2282

36' : 20553+4322
LDS2468

38' : 20553+4231
STT 423

39' : 20564+4308
COU2544

40' : 20511+4224
BRT2277

43' : 20568+4254
ENG 77AB

46' : 20550+4219
LDS2467

48' : 20553+4218
OSO 137AB

49' : 20520+4346
STT 416AB

51' : 20534+4208
LDS2464

51' : 20569+4233
GRV 399

52' : 20547+4211
CVR 233

52' : 20573+4319
ES 1450

52' : 20565+4333
BRT1139

56' : 20568+4335
BRT1957

57' : 20559+4345
COU2543

62' : 20584+4303
ES 1575

63' : 20474+4314
TDT2539

66' : 20590+4259
LDS2475

67' : 20584+4326
ES 1451



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.

20530+4258 COU 2542

 
 
20h 52m 57.26s +42° 58' 25.7" P.A. 199.00 sep 0.1 mag 10.46,12.03 Sp K2 dist. 116.28 pc (379.31 l.y.)
 
 
Coord 2000 20530+4258 Discov num COU2542 Comp Coord arcsec 2000 20 52 57.26 +42 58 25.7
Date first 1988 Date last 2014 Obs 11
Pa first 88 Pa last 198.5 P.A. Now (θ) 198.5°
Sep first 0.4 Sep last 0.109 Sep. Now (ρ) 0.109"
Mag pri 10.46 Mag sec 12.03 delta mag (ΔM) 1.57 Spectral class K2 (yellow-orange)
Pri motion ra +094 Sec motion ra
Pri motion dec +137 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus HIP 103067 Tycho2 3175-00219-1 Gaia DR2 2066014238730126080
BD BD+42 3895 Distance 116.28 Distance ly 379.31
 
 
ORBITAL ELEMENTS
 
 
Period (P)202.1y± 34.4 Periastron (T)2023.9y± 2.6 Semi-major axis (a)0.477a± 0.04
Eccentricity (e)0.374± 0.037 Inclination (i)76.2°± 0.3 Longitude of periastron (ω)136.3°± 11.5
Node (Ω)76.5°± 0.5 Notes ReferenceBAE2021
Equinox Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 94.5 0.244
2001 96.1 0.228
2002 97.9 0.212
2003 100.1 0.196
2004 102.6 0.179
2005 105.7 0.163
2006 109.4 0.147
2007 114.1 0.131
2008 120.0 0.116
2009 127.5 0.103
2010 137.1 0.091
2011 149.0 0.083
2012 163.0 0.078
2013 177.8 0.078
2014 191.6 0.083
2015 203.3 0.092
2016 212.7 0.104
2017 220.0 0.118
2018 225.7 0.132
2019 230.3 0.148
2020 234.0 0.163
2021 237.1 0.179
2022 239.7 0.194
2023 241.9 0.209
2024 243.8 0.223
2025 245.5 0.236
2026 247.1 0.249
2027 248.4 0.261
2028 249.7 0.272
2029 250.9 0.282
2030 252.0 0.292


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


 
  


wds20530%2B4258a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20530+4258 COU 2542 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
BAE2021 orb j Baidin, A.E. & Krechet, V.G. 2021AstBu..76...84B
BAE2021 Astrophys. Bull. 76, 84, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 COU Couteau, P.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20530+4258 COU2542 1999 5 94 0.2 10.46 12.03 K2 D 205257.26+425825.7
20530+4258 COU2542 2007 7 119 0.1 10.46 12.03 K2 D 205257.26+425825.7
20530+4258 COU2542 2010 8 144 0.1 10.46 12.03 K2 D 205257.26+425825.7
20530+4258 COU2542 2014 11 199 0.1 10.46 12.03 K2 O 205257.26+425825.7

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

 
 
WDS 20530+4258 COU 2542 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20530+4258 COU 2542 : MEASURES
 
 
No records found.

 
 
WDS 20530+4258 : VIRTUAL EYEPIECE
 
 

20530+4258 COU2542A mag 10.46 Sp K2 20530+4258 COU2542B sep 0.1 P.A. 193.80 mag 12.03 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 20530+4258 : ALADIN DSS IMAGE @ 20h 52m 57.26s +42° 58' 25.7"
 
 
 
 
WDS 20530+4258 COU 2542 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20530+4258 COU2542 distance=0' 20519+4309 GRV 389 distance=16' 20524+4314 LDS2462 distance=17' 20517+4317 LDS2461 distance=24' 20513+4238 A 614 distance=28' 20535+4328 LDS2465 distance=30' 20508+4238 LDS2457 distance=32' 20556+4243 BRT2282 distance=34' 20553+4322 LDS2468 distance=36' 20553+4231 STT 423 distance=38' 20564+4308 COU2544 distance=39' 20511+4224 BRT2277 distance=40' 20568+4254 ENG 77BC distance=42' 20568+4254 ENG 77AB distance=43' 20568+4254 ENG 77AC distance=43' 20568+4254 ENG 77CD distance=44' 20550+4219 LDS2467 distance=46' 20553+4218 OSO 137AB distance=48' 20553+4218 OSO 137AC distance=48' 20553+4218 OSO 137AD distance=48' 20553+4218 OSO 137AE distance=48' 20553+4218 OSO 137AF distance=48' 20553+4218 OSO 137AG distance=48' 20520+4346 SKF2740BC distance=49' 20520+4346 STT 416AB distance=49' 20534+4208 LDS2464 distance=51' 20569+4233 GRV 399 distance=51' 20547+4211 CVR 233 distance=52' 20573+4319 ES 1450 distance=52' 20565+4333 BRT1139 distance=52' 20568+4335 BRT1957 distance=56' 20559+4345 COU2543 distance=57' 20584+4303 ES 1575 distance=62' 20474+4314 TDT2539 distance=63' 20590+4259 LDS2475 distance=66' 20584+4326 ES 1451 distance=67' 20592+4257 ES 1576 distance=69' 20501+4404 STT 595AB distance=73' 20501+4404 STG 9AC distance=73' 20501+4404 FYM 92AD distance=73' 20501+4404 FYM 92AE distance=73' 20501+4404 FYM 92AF distance=73' 20472+4225 STT 414AB distance=73' 20472+4225 BOT 4AC distance=73' 20590+4330 LDS2476 distance=74' 20470+4335 GRV 380AB distance=75' 20470+4335 GRV 380AC distance=75' 20476+4347 CHN 28 distance=76' 20473+4345 COU2425 distance=77' 20479+4204 ES 1573 distance=79' 20512+4415 CHN 31 distance=79' 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 20530+4258 COU2542 199 0.1
Show 20519+4309 GRV 389 190 61.9 16
Show 20524+4314 LDS2462 265 39.5 17
Show 20517+4317 LDS2461 217 32.6 24
Show 20513+4238 A 614 333 1.5 28
Show 20535+4328 LDS2465 41 12.1 30
Show 20508+4238 LDS2457 106 5.1 32
Show 20556+4243 BRT2282 276 2.5 34
Show 20553+4322 LDS2468 107 60.0 36
Show 20553+4231 STT 423 76 2.7 38
Show 20564+4308 COU2544 160 0.4 39
Show 20511+4224 BRT2277 230 4.2 40
Show 20568+4254 ENG 77 BC 69 102.7 42
Show 20568+4254 ENG 77 AB 328 100.0 43
Show 20568+4254 ENG 77 AC 17 125.8 43
Show 20568+4254 ENG 77 CD 356 92.9 44
Show 20550+4219 LDS2467 193 20.0 46
Show 20553+4218 OSO 137 AB 116 10.8 48
Show 20553+4218 OSO 137 AC 225 11.6 48
Show 20553+4218 OSO 137 AD 276 14.3 48
Show 20553+4218 OSO 137 AE 295 14.9 48
Show 20553+4218 OSO 137 AF 137 16.8 48
Show 20553+4218 OSO 137 AG 346 25.0 48
Show 20520+4346 SKF2740 BC 192 73.4 49
Show 20520+4346 STT 416 AB 117 9.6 49
Show 20534+4208 LDS2464 331 43.8 51
Show 20569+4233 GRV 399 6 64.8 51
Show 20547+4211 CVR 233 235 61.5 52
Show 20573+4319 ES 1450 162 4.7 52
Show 20565+4333 BRT1139 175 3.6 52
Show 20568+4335 BRT1957 177 1.1 56
Show 20559+4345 COU2543 222 1.6 57
Show 20584+4303 ES 1575 356 5.3 62
Show 20474+4314 TDT2539 77 0.5 63
Show 20590+4259 LDS2475 90 12.2 66
Show 20584+4326 ES 1451 101 8.6 67
Show 20592+4257 ES 1576 350 3.7 69
Show 20501+4404 STT 595 AB 48 55.4 73
Show 20501+4404 STG 9 AC 83 102.7 73
Show 20501+4404 FYM 92 AD 242 51.8 73
Show 20501+4404 FYM 92 AE 190 35.2 73
Show 20501+4404 FYM 92 AF 80 46.9 73
Show 20472+4225 STT 414 AB 95 9.9 73
Show 20472+4225 BOT 4 AC 16 104.9 73
Show 20590+4330 LDS2476 65 3.0 74
Show 20470+4335 GRV 380 AB 16 21.4 75
Show 20470+4335 GRV 380 AC 312 44.6 75
Show 20476+4347 CHN 28 57 5.0 76
Show 20473+4345 COU2425 58 0.2 77
Show 20479+4204 ES 1573 39 5.0 79
Show 20512+4415 CHN 31 47 6.7 79

 
 
WDS 20530+4258 : COMPONENTS
 
 
  A
B pa=193.8°
sep=0.11"
 
 
20530+4258 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 205257.26+425825.7 Mag 10.46 Spectral class K2 (yellow-orange)
PmRA 94.00 PmDE 137.0 HIP 103067 Tycho2 3175-00219-1
BD BD+42 3895
Tycho2
Tycho2 3175-00219-1 Pflag RAmdeg 313.23893805 DEmdeg 42.97413473
PmRA 99.0 PmDE 141.0 E RAmdeg 23 E DEmdeg 23
E pmRA 1.2 E pmDE 1.2 EpRAm 1985.83 EpDEm 1985.40
Num 7 Q RAmdeg 0.7 Q DEmdeg 1.4 Q pmRA 0.7
Q pmDE 1.4 BTmag 11.359 E BTmag 0.058 VTmag 10.275
E VTmag 0.035 Prox 999 TYC T HIP 103067
CCDM AB RAdeg 313.23862694 DEdeg 42.97381444 EpRA 1990 1.66
EpDE 1990 1.67 E RAdeg 27.3 E DEdeg 26.9 Posflg P
Corr -0.1
Hipparcos
Catalog H HIP 103067 Proxy H RAhms 20 52 57.26
DEdms +42 58 25.7 Vmag 10.09 VarFlag R Vmag H
RAdeg 313.239 DEdeg 42.9738 AstroRef A Plx 9.47
CCDM 20530+4258 N CCDM M Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 87 Rho 0.371 HD BD BD+42 3895
CD CP Dm number +42 3895 VIred 1.47
SpType K2 R SpType Coord arcsec 2000 205257.26+425825.7
Hipparcos 2
HIP 103067 Sn 15 So 3 Nc 2
RArad 5.4670447687 DErad 0.7500341976 Plx 8.6 PmRA 105.07
PmDE 144.97 E RArad 1.3 E DErad 1.2 E Plx 1.64
E pmRA 1.49 E pmDE 1.28 Hpmag 10.2316 E Hpmag 0.0037
SHp 0.036 VA 0 BV 0.988 E BV 0.064
VI 1.03
CCDM
Ccdm 20530+4258 RComp Comp A Note1
Note2 Discov num DRAs -2.70 DDEs 27.1
R dRAs 81 Year Theta Rho
Obs 2 Vmag 9.8 Sp K2 PmNote @
PmRA 94 PmDE 142 Dm number +42 3895 Cat1 BD
Name2 +42 1940 Cat2 AGK2/3 HD M HD
ADS BDS M ADS BDS N IDS * IDS 20493N4235A
HIC 103067
 
 
20530+4258 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 205257.26+425825.6 Mag 12.03 Calc delta mag 1.57
Calc coord yes
CCDM
Ccdm 20530+4258 RComp Comp B Note1
Note2 Discov num COU2542 DRAs DDEs
R dRAs Year 1988 Theta 87 Rho 0.4
Obs 2 Vmag 10.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS * IDS 20493N4235B
HIC 103067