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Current system
21576+6708
ACA 8 AC


Nearby doubles
15' : 21580+6722
MLB 307AB

18' : 21599+6719
TDT3280

21' : 21581+6729
LDS4932

32' : 21542+6644
LEP 103

32' : 22029+6716
MLB1096

33' : 21527+6724
SKF2743

36' : 21520+6723
TDT3201

37' : 22038+6710
TDS1155

43' : 21511+6650
HU 972

44' : 21559+6626
CLL 17AB

50' : 22048+6735
MLB 369

51' : 21595+6620
MLB1095

52' : 21598+6758
STF2853AB

54' : 21491+6648
STF2836AB

60' : 21572+6609
ARY 43

64' : 21531+6806
STTA226AB

64' : 21590+6605
TDT3273

69' : 22066+6754
MLB 311

70' : 22091+6726
KPP1811

71' : 21481+6625
MLB 270

71' : 21498+6802
MLB1094

72' : 21578+6818
MLB 306

73' : 22026+6816
MLB 310AB

75' : 22090+6743
HJ 1742

79' : 21455+6745
HU 970

82' : 22115+6703
MLB1099



Selections
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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.

21576+6708 ACA 8 AC

 
 
21h 57m 33.74s +67° 08' 25.1" P.A. 323.00 sep 71.9 mag 8.23,13.00 Sp F5
 
 
Coord 2000 21576+6708 Discov num ACA   8 Comp AC Coord arcsec 2000 21 57 33.74 +67 08 25.1
Date first 2000 Date last 2006 Obs 3
Pa first 323 Pa last 323.3 P.A. Now (θ) 323.3°
Sep first 72.3 Sep last 71.86 Sep. Now (ρ) 71.86"
Mag pri 8.23 Mag sec 13.00 delta mag (ΔM) 4.77 Spectral class F5 (yellow-white)
Pri motion ra -007 Sec motion ra +003
Pri motion dec -003 Sec motion dec +079
Notes
rPM=1.045
This double is not physical.
 
 
21576+6708 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 209020 19766 21 57 34 +67 08 25 HJ 1711 AB 2015 11 255 8.8 8.23 10.90 2.67
Show 19766 21 57 34 +67 08 25 ACA 8 AC 2006 3 323 71.9 8.23 13.00 4.77 <===
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cepheus SAO 19766 Tycho2 4274-00729-1 Gaia DR2 2219605529109698048
HD 209020
 
 
WDS 21576+6708 ACA 8 AC : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
ACA2005 C - Ashcraft, A.C. ...................
ACA2005 private communication, 2005
ACA2007 C u Ashcraft, A.C. 2007JDSO....3...82A
ACA2007 JDSO 3, 82, 2007
HJ_1826 Mb - Herschel, J.F.W. 1826MmRAS...2..459H
HJ_1826 MemRAS 2, 459, 1826
HJ_1829a Mb - Herschel, J.F.W. 1829MmRAS...3...47H
HJ_1829a MemRAS 3, 47, 1829
HJ_1829b Mb - Herschel, J.F.W. 1829MmRAS...3..177H
HJ_1829b MemRAS 3, 177, 1829
HJ_1831 Ma - Herschel, J.F.W. 1831MmRAS...4..331H
HJ_1831 +Mb MemRAS 4, part 2, 331, 1831
HJ_1833a Ma - Herschel, J.F.W. 1833MmRAS...5...13H
HJ_1833a +Mb MemRAS 5, 13, 1833
HJ_1833b orb - Herschel, J.F.W. 1833MmRAS...5..171H
HJ_1833b MemRAS 5, 171, 1833
HJ_1833c Mb - Herschel, J.F.W. 1833MmRAS...6....1H
HJ_1833c MemRAS 6, 1, 1833
HJ_1833d orb - Herschel, J.F.W. 1833MmRAS...6..149H
HJ_1833d MemRAS 6, 149, 1833
HJ_1835 Ma - Herschel, J.F.W. 1835MmRAS...8...37H
HJ_1835 +Mb MemRAS 8, 37, 1835
HJ_1836 Mb - Herschel, J.F.W. 1836MmRAS...9..193H
HJ_1836 MemRAS 9, 193, 1836
HJ_1847a Ma j Herschel, J.F.W. .
HJ_1847a +Mb Cape Results, London, 1847 (Cape of Good Hope Astronomical Observations 1834-1838)
HJ_1847b Ma j Herschel, J.F.W. .
HJ_1847b Cape Results, London, 1847
HJ_1850 orb - Herschel, J.F.W. 1850MmRAS..18...47H
HJ_1850 MemRAS 18, 47, 1850
HJ_1870 Mb - Herschel, J.F.W. 1870MmRAS..38....1H
HJ_1870 MemRAS 38, 1, 1870
HJ_1874A - Herschel, J.F.W. 1874MNRAS..35...28B
HJ_1874A cited by Burnham (MNRAS 35, 28, 1874)
HJ_1875A Ma - Herschel, J.F.W. 1875AN.....85..323D
HJ_1875A +Mb cited by Doberck, 1875 (see Dob1875b,f,g,h)
HJ_1880A Ma - Herschel, J.F.W. 1880Obs.....3..508G
HJ_1880A +Mb cited by Gledhill (Obs 3, 508, 1880)
HJ_1880B Mb - Herschel, J.F.W. 1880MNRAS..40..497B
HJ_1880B cited by Burnham (MNRAS 40, 497, 1880)
HJ_1897A Ma j Herschel, J.F.W. 1897MNRAS..57..541S
HJ_1897A cited by See (MNRAS 57, 541, 1897)
HJ_1905A Ma - Herschel, J.F.W. 1905LicOB...3..147A
HJ_1905A +Mb cited by Aitken (Lick Obs. Bull. 3, 147, 1905)
HJ_1906A Ma - Herschel, J.F.W. 1906MmRAS..56....1L
HJ_1906A +Mb cited by Lewis (MemRAS 56, 1, 1906)
HJ_1906B Ma - Herschel, J.F.W. 1906QB821.B972.....
HJ_1906B +Mb cited in BDS (Burnham Double Star Cat.), 1906
HJ_1927A Mb - Herschel, J.F.W. 1927sdsc.book......
HJ_1927A cited in SDS (Southern Double Star Catalog), 1927
HJ_1932A Mb - Herschel, J.F.W. 1932QB821.A43......
HJ_1932A cited in ADS (Aitken Double Star Cat.), 1932
HJ_9999 M j Herschel, J.F.W. ...................
HJ_9999 +Ma Unpublished, manuscript or reference not found.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21576+6708 ACA 8 AC 2006 1 323 71.9 9.20 14.00 215733.74+670825.1

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

 
 
WDS 21576+6708 ACA 8 AC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21576+6708 ACA 8 AC : MEASURES
 
 
No records found.

 
 
WDS 21576+6708 : VIRTUAL EYEPIECE
 
 

21576+6708 HJ 1711A mag 8.23 Sp F5 21576+6708 HJ 1711B sep 4.0 P.A. 235.40 mag 10.9 Sp A 21576+6708 ACA 8C sep 60.0 P.A. 343.90 mag 13 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 21576+6708 : ALADIN DSS IMAGE @ 21h 57m 33.74s +67° 08' 25.1"
 
 
 
 
WDS 21576+6708 ACA 8 AC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21576+6708 ACA 8AC distance=0' 21580+6722 MLB 307BC distance=14' 21580+6722 MLB 307AB distance=15' 21599+6719 TDT3280 distance=18' 21581+6729 LDS4932 distance=21' 21542+6644 LEP 103 distance=32' 22029+6716 MLB1096 distance=32' 21527+6724 SKF2743 distance=33' 21520+6723 TDT3201 distance=36' 22038+6710 TDS1155 distance=37' 21511+6650 HU 972 distance=43' 21559+6626 CLL 17AB distance=44' 21559+6626 CLL 17AC distance=44' 22048+6735 MLB 369 distance=50' 21595+6620 MLB1095 distance=51' 21598+6758 STF2853AB distance=52' 21491+6648 STF2836AB distance=54' 21491+6648 WAL 140AC distance=54' 21572+6609 ARY 43 distance=60' 21531+6806 STTA226BC distance=64' 21531+6806 STTA226BD distance=64' 21531+6806 STTA226AB distance=64' 21590+6605 TDT3273 distance=64' 22066+6754 MLB 311 distance=69' 22091+6726 KPP1811 distance=70' 21481+6625 MLB 270 distance=71' 21498+6802 MLB1094 distance=71' 21578+6818 MLB 306 distance=72' 22026+6816 MLB 310BC distance=73' 22026+6816 MLB 310AB distance=73' 22090+6743 HJ 1742 distance=75' 21455+6745 HU 970 distance=79' 22115+6703 MLB1099 distance=82' 22022+6550 MLB 309 distance=83' 22048+6822 MLB 430 distance=85' 22038+6551 MLB 271 distance=88' 21554+6540 HU 1314 distance=90' 21561+6539 HU 974 distance=90' 21516+6545 STF2843AB distance=91' 21516+6545 STF2843AC distance=91' 21444+6621 MLB 269 distance=92' 21576+6842 HAU 28 distance=94' 22138+6710 HDS3156 distance=95' 22102+6811 MLB 370AB distance=95' 22102+6811 MLR 104AC distance=95' 22068+6828 TDT3344 distance=96' 22103+6812 MLB1097 distance=96' 21569+6533 KPP4259 distance=96' 21533+6535 GII 11 distance=97' 21530+6536 GII 10 distance=97' 21526+6535 GII 9 distance=98' 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 21576+6708 HJ 1711 AB 255 8.8
Show 21576+6708 ACA 8 AC 323 71.9
Show 21580+6722 MLB 307 BC 152 3.1 14
Show 21580+6722 MLB 307 AB 194 62.0 15
Show 21599+6719 TDT3280 122 0.5 18
Show 21581+6729 LDS4932 85 122.6 21
Show 21542+6644 LEP 103 213 4.1 32
Show 22029+6716 MLB1096 312 18.5 32
Show 21527+6724 SKF2743 122 19.3 33
Show 21520+6723 TDT3201 121 2.3 36
Show 22038+6710 TDS1155 75 0.9 37
Show 21511+6650 HU 972 255 0.3 43
Show 21559+6626 CLL 17 AB 68 37.0 44
Show 21559+6626 CLL 17 AC 241 35.6 44
Show 22048+6735 MLB 369 105 6.7 50
Show 21595+6620 MLB1095 100 11.2 51
Show 21598+6758 STF2853 AB 188 3.2 52
Show 21491+6648 STF2836 AB 155 11.8 54
Show 21491+6648 WAL 140 AC 253 64.5 54
Show 21572+6609 ARY 43 127 101.0 60
Show 21531+6806 STTA226 BC 149 85.2 64
Show 21531+6806 STTA226 BD 169 50.2 64
Show 21531+6806 STTA226 AB 245 76.3 64
Show 21590+6605 TDT3273 6 0.4 64
Show 22066+6754 MLB 311 197 3.2 69
Show 22091+6726 KPP1811 296 14.1 70
Show 21481+6625 MLB 270 265 1.6 71
Show 21498+6802 MLB1094 229 8.5 71
Show 21578+6818 MLB 306 144 3.8 72
Show 22026+6816 MLB 310 BC 197 4.0 73
Show 22026+6816 MLB 310 AB 254 43.1 73
Show 22090+6743 HJ 1742 334 22.9 75
Show 21455+6745 HU 970 274 0.4 79
Show 22115+6703 MLB1099 213 11.3 82
Show 22022+6550 MLB 309 151 5.3 83
Show 22048+6822 MLB 430 290 6.3 85
Show 22038+6551 MLB 271 140 3.5 88
Show 21554+6540 HU 1314 211 0.1 90
Show 21561+6539 HU 974 101 4.5 90
Show 21516+6545 STF2843 AB 150 1.4 91
Show 21516+6545 STF2843 AC 277 54.7 91
Show 21444+6621 MLB 269 4 2.3 92
Show 21576+6842 HAU 28 36 35.5 94
Show 22138+6710 HDS3156 9 0.7 95
Show 22102+6811 MLB 370 AB 247 3.7 95
Show 22102+6811 MLR 104 AC 48 12.2 95
Show 22068+6828 TDT3344 24 0.5 96
Show 22103+6812 MLB1097 8 13.4 96
Show 21569+6533 KPP4259 17 52.4 96
Show 21533+6535 GII 11 52 6.2 97
Show 21530+6536 GII 10 173 9.3 97

 
 
WDS 21576+6708 : COMPONENTS
 
 
  A B
B pa=235.4°
sep=4.03"
 
C pa=343.9°
sep=59.98"
pa=347.4°
sep=61.37"
 
 
21576+6708 A
 
 
Name HD 209020 Coord arcsec 2000 215733.74+670825.1 Mag 8.23 Spectral class F5 (yellow-white)
PmRA -7.00 PmDE -3.0 SAO 19766 Tycho2 4274-00729-1
HD 209020 DM BD+66 1463
Tycho2
Tycho2 4274-00729-1 Pflag RAmdeg 329.39058169 DEmdeg 67.14033125
PmRA -6.4 PmDE -6.0 E RAmdeg 6 E DEmdeg 6
E pmRA 1.4 E pmDE 1.4 EpRAm 1991.47 EpDEm 1991.42
Num 6 Q RAmdeg 0.5 Q DEmdeg 1.2 Q pmRA 0.5
Q pmDE 1.3 BTmag 8.896 E BTmag 0.016 VTmag 8.228
E VTmag 0.012 Prox 999 TYC T HIP
CCDM RAdeg 329.39061944 DEdeg 67.14034528 EpRA 1990 1.70
EpDE 1990 1.65 E RAdeg 5.8 E DEdeg 6.2 Posflg
Corr 0.1
SAO
SAO 19766 DelFlag RA1950 PmRA1950 -0.0026
DE1950 PmDE1950 0.023 Vmag 7.7 SpType F5
Double code Source 2 CatNum 1085 DM BD+66 1463
DMcomp BDsup HD 209020 M HD 0
GC RA1950rad 5.74362783 DE1950rad 1.16764812 PmRA2000 -0.0023
PmDE2000 0.018
CCDM
Ccdm 21576+6708 RComp Comp A Note1
Note2 Discov num DRAs -2.46 DDEs 26.0
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.2 Sp F5 PmNote *
PmRA -19 PmDE 6 Dm number +66 1463 Cat1 BD
Name2 +66 1085 Cat2 AGK2/3 HD 209020 M HD
ADS BDS A15502 M ADS BDS N IDS IDS 21551N6640A
HIC
 
 
21576+6708 B
 
 
Coord arcsec 2000 215733.17+670822.8 Mag 10.9 Spectral class A (white) PmRA 30.00
PmDE 19.0 Calc delta mag 2.67 Calc coord yes
CCDM
Ccdm 21576+6708 RComp Comp B Note1
Note2 Discov num HJ 1711 DRAs DDEs
R dRAs Year 1908 Theta 250 Rho 13.5
Obs 1 Vmag 10.8 Sp A PmNote
PmRA 34 PmDE 18 Dm number Cat1
Name2 Cat2 HD 209021 M HD
ADS BDS A15502 M ADS BDS N N IDS IDS 21551N6640B
HIC
 
 
21576+6708 C
 
 
Coord arcsec 2000 215730.88+670922.7 Mag 13 PmRA 3.00 PmDE 79.0
Calc delta mag 4.77 Calc coord yes