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Doubles in session


Current system
21308+4827
A 770 AB


Nearby doubles
7' : 21304+4832
SWN 3

9' : 21314+4821
COU2441

10' : 21314+4829
ARN 78AB

11' : 21321+4828
COU2442

13' : 21315+4817
A 771AB

16' : 21295+4836
SWN 1

18' : 21316+4811
SWN 5

20' : 21327+4829
HJ 1657AB

20' : 21323+4821
DJU 7

22' : 21300+4848
SWN 2

25' : 21306+4852
OSO 148AB

26' : 21332+4816
POP 55

27' : 21288+4809
HJ 1651

27' : 21314+4853
SWN 4

29' : 21326+4850
SWN 9

32' : 21339+4833
YR 3

34' : 21338+4811
SWN 6

35' : 21339+4842
SWN 7

35' : 21332+4853
TDT3028

36' : 21308+4752
A 769

40' : 21342+4808
ES 519

40' : 21346+4817
SWN 8

41' : 21346+4813
RAO 462AB

45' : 21306+4742
ES 824

49' : 21303+4740
COU2440

49' : 21278+4748
ES 680



Selections
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Binary Systems
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Neglected List I
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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21308+4827 A 770 AB

 
 
21h 30m 48.00s +48° 27' 25.4" P.A. 143.00 sep 0.1 mag 7.99,7.99 Sp K0
 
 
Coord 2000 21308+4827 Discov num A   770 Comp AB Coord arcsec 2000 21 30 48.00 +48 27 25.4
Date first 1928 Date last 2018 Obs 10
Pa first 326 Pa last 142.7 P.A. Now (θ) 142.7°
Sep first 0.3 Sep last 0.135 Sep. Now (ρ) 0.135"
Mag pri 7.99 Mag sec 7.99 delta mag (ΔM) 0 Spectral class K0 (yellow-orange)
Pri motion ra +018 Sec motion ra
Pri motion dec -142 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
21308+4827 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 21 30 48 +48 27 25 A 770 AB 2018 10 143 0.1 7.99 7.99 0.00 Y <===
Show 21 30 48 +48 27 25 A 770 AB,C 2018 13 317 1.1 8.74 11.90 3.16
Show 21 30 48 +48 27 25 A 770 AB,D 2017 11 15 98.9 8.74 10.59 1.85
Show 21 30 50 +48 28 59 A 770 DE 2015 11 41 7.2 10.59 12.00 1.41
Quintuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Tycho2 3594-01084-1 Gaia DR2 1978557468965457408 ADS 15052
 
 
ORBITAL ELEMENTS
 
 
Period (P)146y Periastron (T)1958.6y Semi-major axis (a)0.307a
Eccentricity (e)0.2 Inclination (i)89.5° Longitude of periastron (ω)90°
Node (Ω)321.4° Notesn ReferenceTok2019e
Equinox2000 Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 141.7 0.278
2001 141.7 0.273
2002 141.8 0.268
2003 141.8 0.262
2004 141.8 0.256
2005 141.9 0.250
2006 141.9 0.243
2007 141.9 0.236
2008 142.0 0.229
2009 142.0 0.221
2010 142.1 0.213
2011 142.1 0.205
2012 142.1 0.197
2013 142.2 0.188
2014 142.3 0.179
2015 142.3 0.170
2016 142.4 0.161
2017 142.5 0.151
2018 142.6 0.142
2019 142.7 0.132
2020 142.8 0.122
2021 142.9 0.112
2022 143.1 0.102
2023 143.3 0.092
2024 143.6 0.081
2025 143.9 0.071
2026 144.4 0.060
2027 145.1 0.050
2028 146.1 0.039
2029 147.9 0.028
2030 151.9 0.018


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


 
  


wds21308%2B4827a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21308+4827 A 770 AB : NOTES
 
 
discov_num notes refcode
A 770 Also a spectroscopic binary of indeterminate period. Tok2019b
Espin calls this HJ 1657, BDS 11057. Es_1932B
 
 
REFERENCES
 
 
refcode metd author reference
Es_1932B Mb - Espin, T.E. 1932QB821.A43......
Es_1932B cited in ADS (Aitken Double Star Cat.), 1932
Tok2019b not j Sperauskas, J., Deveilkis, V. & Tokovinin, A. 2019A&A...626A..31S
Tok2019b A&A 626 A31, 2019
Tok2019e St j Tokovinin, A., Everett, M.E., Horch, E.P., Torres, G. & Latham, D.W. 2019AJ....158..167T
Tok2019e +orb AJ 158, 167, 2019
 
 
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
21308+4827 A 770 AB 1989 8 143 0.2 8.80 11.30 K0 N 213048.00+482725.4
21308+4827 A 770 AB 2017 9 317 1.1 7.99 7.99 K0 N 213048.00+482725.4
21308+4827 A 770 AB 2018 10 143 0.1 7.99 7.99 K0 NO 213048.00+482725.4

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

 
 
WDS 21308+4827 A 770 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21308+4827 A 770 AB : MEASURES
 
 
No records found.

 
 
WDS 21308+4827 : VIRTUAL EYEPIECE
 
 

21308+4827 A 770A mag 7.99 Sp K0 21308+4827 A 770B sep 0.1 P.A. 153.20 mag 7.99 21308+4827 A 770C sep 0.9 P.A. 328.00 mag 11.9 21308+4827 A 770D sep 97.1 P.A. 14.60 mag 10.59 Sp F0 21308+4827 A 770E sep 103.1 P.A. 15.50 mag 12 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 21308+4827 : ALADIN DSS IMAGE @ 21h 30m 48.00s +48° 27' 25.4"
 
 
 
 
WDS 21308+4827 A 770 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21308+4827 A 770AB distance=0' 21308+4827 A 770DE distance=2' 21304+4832 SWN 3 distance=7' 21314+4821 COU2441 distance=9' 21314+4829 ARN 78AB distance=10' 21321+4828 COU2442 distance=11' 21315+4817 A 771AB distance=13' 21295+4836 SWN 1 distance=16' 21316+4811 SWN 5 distance=18' 21327+4829 HJ 1657AB distance=20' 21323+4821 DJU 7 distance=20' 21300+4848 SWN 2 distance=22' 21306+4852 OSO 148AB distance=25' 21306+4852 OSO 148AC distance=25' 21306+4852 OSO 148AD distance=25' 21332+4816 POP 55 distance=26' 21288+4809 HJ 1651 distance=27' 21314+4853 SWN 4 distance=27' 21326+4850 SWN 9 distance=29' 21339+4833 YR 3 distance=32' 21338+4811 SWN 6 distance=34' 21339+4842 SWN 7 distance=35' 21332+4853 TDT3028 distance=35' 21308+4752 A 769 distance=36' 21342+4808 ES 519 distance=40' 21346+4817 SWN 8 distance=40' 21346+4813 RAO 462AB distance=41' 21346+4813 GRV1284AC distance=41' 21306+4742 ES 824 distance=45' 21303+4740 COU2440 distance=49' 21278+4748 ES 680 distance=49' 21361+4814 ES 1174 distance=54' 21254+4818 ES 1102AB distance=55' 21254+4818 CRB 7Ca,Cb distance=55' 21254+4818 ES 1102CD distance=55' 21254+4818 ES 1102BC distance=55' 21297+4732 A 767 distance=57' 21366+4824 TDT3057 distance=58' 21304+4926 TDT3002 distance=59' 21260+4905 ES 821 distance=60' 21264+4911 ES 822 distance=63' 21291+4727 TDS1130 distance=63' 21265+4917 ES 823 distance=66' 21246+4801 HJ 1644AB distance=68' 21246+4801 HJ 1644AC distance=68' 21304+4717 ES 516 distance=70' 21256+4741 ES 679 distance=70' 21367+4905 TDT3061 distance=70' 21242+4801 SKF2397 distance=72' 21263+4732 TDT2966 distance=72' 21380+4829 ES 102 distance=72' 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 21308+4827 A 770 AB 143 0.1
Show 21308+4827 A 770 AB,C 317 1.1
Show 21308+4827 A 770 AB,D 15 98.9
Show 21308+4827 A 770 DE 41 7.2 2
Show 21304+4832 SWN 3 142 1.0 7
Show 21314+4821 COU2441 304 0.2 9
Show 21314+4829 ARN 78 AB 101 50.0 10
Show 21321+4828 COU2442 300 0.2 11
Show 21315+4817 A 771 AB 50 0.0 13
Show 21295+4836 SWN 1 2 5.3 16
Show 21316+4811 SWN 5 30 5.1 18
Show 21327+4829 HJ 1657 AB 16 23.1 20
Show 21323+4821 DJU 7 98 3.1 20
Show 21300+4848 SWN 2 352 3.1 22
Show 21306+4852 OSO 148 AB 170 16.1 25
Show 21306+4852 OSO 148 AC 119 23.8 25
Show 21306+4852 OSO 148 AD 346 18.6 25
Show 21332+4816 POP 55 201 4.9 26
Show 21288+4809 HJ 1651 334 11.9 27
Show 21314+4853 SWN 4 56 0.9 27
Show 21326+4850 SWN 9 258 15.4 29
Show 21339+4833 YR 3 214 0.3 32
Show 21338+4811 SWN 6 272 6.2 34
Show 21339+4842 SWN 7 313 1.9 35
Show 21332+4853 TDT3028 126 0.7 35
Show 21308+4752 A 769 296 0.7 36
Show 21342+4808 ES 519 318 8.2 40
Show 21346+4817 SWN 8 119 7.8 40
Show 21346+4813 RAO 462 AB 82 0.8 41
Show 21346+4813 GRV1284 AC 35 12.3 41
Show 21306+4742 ES 824 353 6.0 45
Show 21303+4740 COU2440 179 0.5 49
Show 21278+4748 ES 680 331 7.6 49
Show 21361+4814 ES 1174 254 2.2 54
Show 21254+4818 ES 1102 AB 195 49.1 55
Show 21254+4818 CRB 7 Ca,Cb 110 1.6 55
Show 21254+4818 ES 1102 CD 110 3.6 55
Show 21254+4818 ES 1102 BC 38 7.0 55
Show 21297+4732 A 767 169 1.3 57
Show 21366+4824 TDT3057 232 0.5 58
Show 21304+4926 TDT3002 311 1.7 59
Show 21260+4905 ES 821 276 7.0 60
Show 21264+4911 ES 822 24 1.4 63
Show 21291+4727 TDS1130 176 1.3 63
Show 21265+4917 ES 823 280 11.1 66
Show 21246+4801 HJ 1644 AB 114 24.1 68
Show 21246+4801 HJ 1644 AC 42 37.7 68
Show 21304+4717 ES 516 147 3.4 70
Show 21256+4741 ES 679 275 3.6 70
Show 21367+4905 TDT3061 46 0.6 70
Show 21242+4801 SKF2397 246 2.8 72

 
 
WDS 21308+4827 : COMPONENTS
 
 
  A B C D
B pa=153.2°
sep=0.12"
 
C pa=328.0°
sep=0.94"
pa=328.6°
sep=1.06"
 
D pa=14.6°
sep=97.13"
pa=14.5°
sep=97.22"
pa=15.0°
sep=96.49"
 
E pa=15.5°
sep=103.14"
pa=15.5°
sep=103.23"
pa=15.9°
sep=102.50"
pa=30.3°
sep=6.22"
 
 
21308+4827 A
 
 
Coord arcsec 2000 213048.00+482725.4 Mag 7.99 Spectral class K0 (yellow-orange) PmRA 18.00
PmDE -142.0 Tycho2 3594-01084-1
Tycho2
Tycho2 3594-01084-1 Pflag RAmdeg 322.70001014 DEmdeg 48.45705747
PmRA 6.7 PmDE -143.7 E RAmdeg 9 E DEmdeg 9
E pmRA 1.3 E pmDE 1.3 EpRAm 1990.84 EpDEm 1990.78
Num 7 Q RAmdeg 0.7 Q DEmdeg 1.6 Q pmRA 0.7
Q pmDE 1.6 BTmag 9.506 E BTmag 0.020 VTmag 8.739
E VTmag 0.014 Prox 959 TYC T HIP
CCDM RAdeg 322.69998722 DEdeg 48.45739083 EpRA 1990 1.68
EpDE 1990 1.62 E RAdeg 8.6 E DEdeg 9.1 Posflg
Corr 0.0
 
 
21308+4827 B
 
 
Coord arcsec 2000 213048.01+482725.3 Mag 7.99 Calc coord yes
 
 
21308+4827 C
 
 
Coord arcsec 2000 213047.95+482726.2 Mag 11.9 Calc delta mag 3.91 Calc coord yes
 
 
21308+4827 D
 
 
Coord arcsec 2000 213050.46+482859.4 Coord calc 213050.46+482859.4 Mag 10.59 Spectral class F0 (yellow-white)
PmRA -8.00 PmDE -18.0 Calc delta mag 2.6
 
 
21308+4827 E
 
 
Coord arcsec 2000 213050.78+482904.8 Mag 12 PmRA -7.00 PmDE -13.0
Calc delta mag 4.01 Calc coord yes