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Doubles in session


Current system
21395+3009
A 772
HD 206168


Nearby doubles
20' : 21383+2958
HJ 1670

21' : 21384+2953
MLB 491

27' : 21412+2955
GRV 491

37' : 21384+3044
LDS4900

37' : 21420+2951
MLB 720

41' : 21401+2928
BRT 57

41' : 21364+3015
MLB 719

42' : 21412+3043
J 3143

43' : 21362+3003
BU 167

45' : 21429+3014
TDT3119

49' : 21430+2951
KPP 498

49' : 21389+3058
TDT3081

50' : 21407+3056
GRV 490

52' : 21355+3012
UC 4502

53' : 21410+2920
STT 448

57' : 21353+3020
MLB 718

57' : 21420+2924
MLB 539

62' : 21422+3100
OSO 154AB

62' : 21348+3016
ES 380AB

64' : 21353+3043
TDT3047

65' : 21416+2911
GRV 493

67' : 21363+2917
BRT 56

67' : 21442+2942
MLB 493

71' : 21358+3101
HJ 939AB

72' : 21356+2918
GRV 481

73' : 21358+3104
HJ 940



Selections
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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.

21395+3009 A 772 (HD 206168)

 
 
21h 39m 30.24s +30° 09' 22.2" P.A. 112.00 sep 0.1 mag 8.70,9.80 Sp A5 dist. 202.84 pc (661.66 l.y.)
 
 
Coord 2000 21395+3009 Discov num A   772 Comp Coord arcsec 2000 21 39 30.24 +30 09 22.2
Date first 1904 Date last 2007 Obs 45
Pa first 27 Pa last 112 P.A. Now (θ) 43.8°
Sep first 0.3 Sep last 0.148 Sep. Now (ρ) 0.202"
Mag pri 8.70 Mag sec 9.80 delta mag (ΔM) 1.1 Spectral class A5 (white)
Pri motion ra +023 Sec motion ra
Pri motion dec -003 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 206168 Constellation Cygnus SAO 89883 HIP 106940
Tycho2 2717-00007-1 Gaia DR2 1849716176710461184 HD 206168 ADS 15182
BD BD+29 4474 Distance 202.84 Distance ly 661.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)138.7y Periastron (T)1999.56y Semi-major axis (a)0.198a
Eccentricity (e)0.549 Inclination (i)152.7° Longitude of periastron (ω)233.7°
Node (Ω)42.8° Notesn ReferenceDoc2011b
Equinox2000 Last observation2010 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 167.5 0.082
2001 156.2 0.082
2002 145.0 0.083
2003 134.2 0.085
2004 124.1 0.088
2005 114.9 0.093
2006 106.6 0.098
2007 99.2 0.104
2008 92.7 0.111
2009 86.9 0.118
2010 81.8 0.124
2011 77.1 0.131
2012 73.0 0.138
2013 69.2 0.145
2014 65.7 0.151
2015 62.6 0.158
2016 59.6 0.164
2017 56.9 0.170
2018 54.4 0.176
2019 52.0 0.181
2020 49.8 0.187
2021 47.7 0.192
2022 45.7 0.197
2023 43.8 0.202
2024 42.0 0.207
2025 40.3 0.212
2026 38.6 0.216
2027 37.0 0.220
2028 35.5 0.224
2029 34.0 0.228
2030 32.6 0.232


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


 
  


wds21395%2B3009b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21395+3009 A 772 (HD 206168) : NOTES
 
 
discov_num notes refcode
A 772 Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 3.37 +/- 2.56, 3.29, and 1.82 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Doc2011b orb - Docobo, J.A. & Tamazian, V.S. 2011IAUDS.173....1D
Doc2011b Inf. Circ. 173, 1, 2011
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
 
 
DISCOVERER
 
 
idgroup discov author
1 A Aitken, R.G.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21395+3009 A 772 2007 44 95 0.1 8.70 9.80 A5 NO 213930.24+300922.2

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

 
 
WDS 21395+3009 A 772 (HD 206168) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21395+3009 A 772 (HD 206168) : MEASURES
 
 
No records found.

 
 
WDS 21395+3009 (HD 206168) : VIRTUAL EYEPIECE
 
 

21395+3009 A 772A mag 8.7 Sp A5 21395+3009 A 772B sep 0.1 P.A. 115.00 mag 9.8 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 21395+3009 (HD 206168) : ALADIN DSS IMAGE @ 21h 39m 30.24s +30° 09' 22.2"
 
 
 
 
WDS 21395+3009 A 772 (HD 206168) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21395+3009 A 772 distance=0' 21383+2958 HJ 1670 distance=20' 21384+2953 MLB 491 distance=21' 21412+2955 GRV 491 distance=27' 21422+3008 MLB 575AC distance=35' 21422+3008 MLB 575BC distance=35' 21384+3044 LDS4900 distance=37' 21420+2951 MLB 720 distance=37' 21401+2928 BRT 57 distance=41' 21364+3015 MLB 719 distance=41' 21412+3043 J 3143 distance=42' 21362+3003 BU 167 distance=43' 21429+3014 TDT3119 distance=45' 21430+2951 KPP 498 distance=49' 21389+3058 TDT3081 distance=49' 21407+3056 GRV 490 distance=50' 21355+3012 UC 4502 distance=52' 21410+2920 STT 448 distance=53' 21353+3020 MLB 718 distance=57' 21420+2924 MLB 539 distance=57' 21348+3016 ES 380CD distance=61' 21422+3100 OSO 154AB distance=62' 21422+3100 OSO 154AC distance=62' 21422+3100 OSO 154AD distance=62' 21422+3100 OSO 154AE distance=62' 21348+3016 ES 380AB distance=62' 21348+3016 ES 380AC distance=62' 21353+3043 TDT3047 distance=64' 21416+2911 GRV 493 distance=65' 21363+2917 BRT 56 distance=67' 21442+2942 MLB 493 distance=67' 21358+3101 HJ 939AB distance=71' 21358+3101 STF2808AC distance=71' 21358+3101 HJ 939CD distance=72' 21356+2918 GRV 481 distance=72' 21358+3104 HJ 940 distance=73' 21451+3026 TDT3136 distance=74' 21418+2901 MLB 492 distance=75' 21409+3122 AG 275 distance=76' 21455+2948 DAM 237 distance=81' 21457+2957 TDT3145 distance=82' 21332+3015 ES 379 distance=82' 21458+2954 TDT3146 distance=84' 21331+2958 J 3141AB distance=84' 21331+2958 LOS 5AC distance=84' 21331+2958 LOS 5BC distance=85' 21458+2945 DAM 236 distance=85' 21396+3136 TDT3088 distance=87' 21327+2954 HEI 190 distance=91' 21452+2914 UC 4550 distance=93' 21334+3058 COU 732Aa,Ab distance=94' 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 21395+3009 A 772 112 0.1
Show 21383+2958 HJ 1670 78 11.7 20
Show 21384+2953 MLB 491 34 4.8 21
Show 21412+2955 GRV 491 21 31.4 27
Show 21422+3008 MLB 575 AC 133 17.4 35
Show 21422+3008 MLB 575 BC 108 2.7 35
Show 21384+3044 LDS4900 213 17.4 37
Show 21420+2951 MLB 720 140 7.2 37
Show 21401+2928 BRT 57 137 5.0 41
Show 21364+3015 MLB 719 136 6.0 41
Show 21412+3043 J 3143 262 6.6 42
Show 21362+3003 BU 167 89 1.7 43
Show 21429+3014 TDT3119 157 2.7 45
Show 21430+2951 KPP 498 58 3.9 49
Show 21389+3058 TDT3081 114 0.8 49
Show 21407+3056 GRV 490 328 31.7 50
Show 21355+3012 UC 4502 264 46.1 52
Show 21410+2920 STT 448 31 0.1 53
Show 21353+3020 MLB 718 307 8.1 57
Show 21420+2924 MLB 539 171 4.8 57
Show 21348+3016 ES 380 CD 312 2.9 61
Show 21422+3100 OSO 154 AB 25 15.3 62
Show 21422+3100 OSO 154 AC 239 15.8 62
Show 21422+3100 OSO 154 AD 166 16.4 62
Show 21422+3100 OSO 154 AE 108 19.6 62
Show 21348+3016 ES 380 AB 49 16.2 62
Show 21348+3016 ES 380 AC 106 61.5 62
Show 21353+3043 TDT3047 19 2.4 64
Show 21416+2911 GRV 493 184 44.7 65
Show 21363+2917 BRT 56 306 3.2 67
Show 21442+2942 MLB 493 330 8.6 67
Show 21358+3101 HJ 939 AB 176 15.6 71
Show 21358+3101 STF2808 AC 286 42.8 71
Show 21358+3101 HJ 939 CD 344 15.1 72
Show 21356+2918 GRV 481 184 64.0 72
Show 21358+3104 HJ 940 329 21.0 73
Show 21451+3026 TDT3136 0.8 74
Show 21418+2901 MLB 492 114 7.0 75
Show 21409+3122 AG 275 13 10.9 76
Show 21455+2948 DAM 237 233 6.3 81
Show 21457+2957 TDT3145 250 2.2 82
Show 21332+3015 ES 379 300 9.0 82
Show 21458+2954 TDT3146 359 2.5 84
Show 21331+2958 J 3141 AB 313 6.8 84
Show 21331+2958 LOS 5 AC 350 6.1 84
Show 21331+2958 LOS 5 BC 70 4.1 85
Show 21458+2945 DAM 236 143 5.9 85
Show 21396+3136 TDT3088 149 2.9 87
Show 21327+2954 HEI 190 81 1.8 91
Show 21452+2914 UC 4550 15 42.5 93
Show 21334+3058 COU 732 Aa,Ab 265 0.5 94

 
 
WDS 21395+3009 : COMPONENTS
 
 
  A
B pa=115.0°
sep=0.13"
 
 
21395+3009 A
 
 
Componente originario normalizzato AB Name HD 206168 Coord arcsec 2000 213930.24+300922.2 Mag 8.7
Spectral class A5 (white) PmRA 23.00 PmDE -3.0 SAO 89883
HIP 106940 Tycho2 2717-00007-1 HD 206168 BD BD+29 4474
Tycho2
Tycho2 2717-00007-1 Pflag RAmdeg 324.87608419 DEmdeg 30.15617105
PmRA 25.7 PmDE 3.5 E RAmdeg 5 E DEmdeg 5
E pmRA 1.3 E pmDE 1.1 EpRAm 1991.06 EpDEm 1991.33
Num 10 Q RAmdeg 1.2 Q DEmdeg 0.8 Q pmRA 1.2
Q pmDE 0.9 BTmag 8.627 E BTmag 0.015 VTmag 8.323
E VTmag 0.011 Prox 999 TYC T HIP 106940
CCDM AB RAdeg 324.87601278 DEdeg 30.15616306 EpRA 1990 1.36
EpDE 1990 1.69 E RAdeg 5.1 E DEdeg 4.5 Posflg P
Corr 0.1
SAO
SAO 89883 DelFlag RA1950 PmRA1950 0.0015
DE1950 PmDE1950 0.005 Vmag 8.5 SpType A5
Double code Source 34 CatNum 12759 DM BD+29 4474
DMcomp BDsup HD 206168 M HD 0
GC RA1950rad 5.66059197 DE1950rad 0.52236254 PmRA2000 0.0016
PmDE2000 0.001
Hipparcos
Catalog H HIP 106940 Proxy H RAhms 21 39 30.24
DEdms +30 09 22.2 Vmag 8.29 VarFlag R Vmag H
RAdeg 324.876 DEdeg 30.1562 AstroRef * Plx 4.4
CCDM 21395+3009 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 239 Rho 0.142 HD 206168 BD BD+29 4474
CD CP Dm number +29 4474 VIred 0.28
SpType A5 R SpType Coord arcsec 2000 213930.24+300922.2
Hipparcos 2
HIP 106940 Sn 55 So 3 Nc 2
RArad 5.6701560476 DErad 0.5263243265 Plx 4.93 PmRA 24.28
PmDE 5.19 E RArad 0.54 E DErad 0.55 E Plx 0.88
E pmRA 0.72 E pmDE 0.65 Hpmag 8.3625 E Hpmag 0.0015
SHp 0.015 VA 0 BV 0.294 E BV 0.011
VI 0.34
CCDM
Ccdm 21395+3009 RComp Comp A Note1
Note2 Discov num DRAs 0.26 DDEs 21.9
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.2 Sp A5 PmNote *
PmRA 32 PmDE 5 Dm number +29 4474 Cat1 BD
Name2 +29 2630 Cat2 AGK2/3 HD 206168 M HD
ADS BDS A15182 M ADS BDS N IDS IDS 21351N2942A
HIC 106940
 
 
21395+3009 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 213930.25+300922.1 Mag 9.8 Calc delta mag 1.1
Calc coord yes
CCDM
Ccdm 21395+3009 RComp Comp B Note1 *
Note2 Discov num A 772 DRAs DDEs
R dRAs Year 1958 Theta 325 Rho 0.3
Obs 17 Vmag 9.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A15182 M ADS BDS N IDS IDS 21351N2942B
HIC 106940