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Current system
21491+6648
WAL 140 AC


Nearby doubles
12' : 21511+6650
HU 972

23' : 21481+6625
MLB 270

31' : 21542+6644
LEP 103

39' : 21444+6621
MLB 269

39' : 21520+6723
TDT3201

43' : 21527+6724
SKF2743

46' : 21559+6626
CLL 17AB

54' : 21576+6708
HJ 1711AB

55' : 21430+6606
WNT 1AB

62' : 21455+6745
HU 970

62' : 21572+6609
ARY 43

63' : 21580+6722
MLB 307AB

63' : 21459+6548
HJ 1696

65' : 21385+6636
LDS4902

65' : 21516+6545
STF2843AB

67' : 21581+6729
LDS4932

68' : 21595+6620
MLB1095

71' : 21599+6719
TDT3280

73' : 21590+6605
TDT3273

76' : 21526+6535
GII 9

76' : 21530+6536
GII 10

77' : 21498+6802
MLB1094

77' : 21533+6535
GII 11

78' : 21554+6540
HU 1314

80' : 21365+6718
KPP4238

81' : 21561+6539
HU 974



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.

21491+6648 WAL 140 AC

 
 
21h 49m 08.12s +66° 47' 31.9" P.A. 253.00 sep 64.5 mag 6.53,10.53 Sp F4V dist. 98.04 pc (319.81 l.y.)
 
 
Coord 2000 21491+6648 Discov num WAL 140 Comp AC Coord arcsec 2000 21 49 08.12 +66 47 31.9
Date first 1894 Date last 2015 Obs 8
Pa first 248 Pa last 253.2 P.A. Now (θ) 253.2°
Sep first 67.6 Sep last 64.486 Sep. Now (ρ) 64.486"
Mag pri 6.53 Mag sec 10.53 delta mag (ΔM) 4 Spectral class F4V (yellow-white)
Pri motion ra -021 Sec motion ra -020
Pri motion dec -066 Sec motion dec -008
Notes N (See Notes)
rPM=0.838
This double is not physical.
 
 
21491+6648 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 207826 19665 21 49 08 +66 47 32 STF 2836 AB 2015 25 155 11.8 6.53 10.36 3.83
Show 19665 21 49 08 +66 47 32 WAL 140 AC 2015 8 253 64.5 6.53 10.53 4.00 <===
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cepheus SAO 19665 HIP 107710 Tycho2 4274-02376-1
Gaia DR2 2219558220048347264 HD 207826 BD BD+66 1441 Distance 98.04
Distance ly 319.81
 
 
WDS 21491+6648 WAL 140 AC : NOTES
 
 
discov_num notes refcode
STF2836 A is a spectroscopic binary, P = 2.73d.
 
 
REFERENCES
 
 
refcode metd author reference
STFA (F. Struve DD - Appendix list #1) ...................
STFB (F. Struve DD - Appendix list #2) ...................
StF1833A Ma - Struve, F.G.W. 1833MmRAS...5...13H
StF1833A +Mc cited by Herschel (MemRAS 5, 13, 1833)
StF1833B Ma - Struve, F.G.W. 1833AN.....10..389B
StF1833B cited by Bessel (AN 10, 389, 1833)
StF1837 Ma - Struve, F.G.W. 1837AN.....14...249
StF1837 Stellarum duplicium et multiplicium mensurae micrometricae...
StF1837 (Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837
StF1844A Ma - Struve, F.G.W. 1844QB43.S66.......
StF1844A cited by Smyth (Cycle of Celestial Objects 2, 1844)
StF1852A Ma - Struve, F.G.W. .
StF1852A cited by Bishop (Bishop Obs. Astron. Observations 1852)
StF1865A Ma - Struve, F.G.W. 1865AN.....64...81E
StF1865A cited by Engelmann (AN 64, 81, #1518, 1865)
StF1875A Ma - Struve, F.G.W. 1875AN.....85..323D
StF1875A cited by Doberck, 1875 (see Dob1875b,f,g,h)
StF1878 Ma - Struve, F.G.W. .
StF1878 Pulkova Observations 9, 1878
StF1878B Ma - Struve, F.G.W. 1878Obs.....2..239G
StF1878B cited by Gledhill (Obs 2, 239, 1878)
StF1880A Ma - Struve, F.G.W. 1880Obs.....3..535G
StF1880A cited by Gledhill (Obs 3, 535, 1880)
StF1906A Ma - Struve, F.G.W. 1906QB821.B972.....
StF1906A cited in BDS (Burnham Double Star Cat.), 1906
StF1906B Ma - Struve, F.G.W. 1906MmRAS..56....1L
StF1906B cited by Lewis (MemRAS 56, 1, 1906)
StF1922A Ma - Struve, F.G.W. 1922AN....216...49R
StF1922A cited by Rabe (AN 216, 49, 1922)
StF1932A Ma - Struve, F.G.W. 1932QB821.A43......
StF1932A cited in ADS (Aitken Double Star Cat.), 1932
StF2002 - - Weis, J.
StF2002 F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue
StF2002 USNO Library : QB 821 .S8 W49 2002
StF2022 - - email note from Jan Weis: 6 July 2022
StF9999 Ma - Struve, F.G.W. ...................
StF9999 Unpublished, manuscript or reference not found.
Wal1934 Ma j Wallenquist, A. 1934AnBos...6....3W
Wal1934 Ann. Bosscha Obs. Lembang 6, Pt.2, 1934
Wal1944a Zw - Wallenquist, A. 1954MeUpp...85.....
Wal1944a Medd. Uppsala Obs. #85, 1944
Wal1944a (Visual measures with wedge photometer attached to 14-inch refractor. No dates
Wal1944a given for measures; default date = decade of publication added.)
Wal1944b Zw - Wallenquist, A. 1954MeUpp...87.....
Wal1944b Medd. Uppsala Obs. #87, 1944
Wal1944b (Visual measures with wedge photometer attached to 14-inch refractor. No dates
Wal1944b given for measures; default date = decade of publication added.)
Wal1947 Zw - Wallenquist, A. 1947UppAn...2....2W
Wal1947 Ann. Uppsala Astron. Obs. 2, No.2, 1947
Wal1947 (A catalogue containing results of the two prior series, plus additional measures
Wal1947 with the 14-inch refractor and wedge photometer)
Wal1948 Zw - Wallenquist, A. 1948UppAn...2....3W
Wal1948 Ann. Uppsala Astron Obs. 2, #3, 1948
Wal1948 (Visual measures of southern double stars made with 17-inch refractor of La Plata
Wal1948 and wedge photometer. No dates listed; default date = decade of publication added)
Wal1950 Zd - Wallenquist, A. 1950MeUpp..103.....
Wal1950 Medd. Uppsala Obs. #103, 1950
Wal1954 Zw - Wallenquist, A. 1954UppAn...4Q....W
Wal1954 Ann. Uppsala Astron Obs. 4, #2, 1954
Wal1954 ("General Catalogue of Differences in Magnitude of Double Stars". Weighted mean
Wal1954 values from numerous sources)
Wal1958 Zw - Wallenquist, A. 1958MeUpp..118.....
Wal1958 Medd. Uppsala Obs. #118, 1958
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21491+6648 WAL 140 AC 2000 6 253 64.7 6.53 10.53 F4V D 214908.12+664731.9
21491+6648 WAL 140 AC 2003 7 253 64.6 6.53 10.53 F4V N D 214908.12+664731.9
21491+6648 WAL 140 AC 2015 8 253 64.5 6.53 10.53 F4V N 214908.12+664731.9

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

 
 
WDS 21491+6648 WAL 140 AC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21491+6648 WAL 140 AC : MEASURES
 
 
No records found.

 
 
WDS 21491+6648 : VIRTUAL EYEPIECE
 
 

21491+6648 STF2836A mag 6.53 Sp F4V 21491+6648 STF2836B sep 10.9 P.A. 169.50 mag 10.36 21491+6648 WAL 140C sep 30.6 P.A. 232.50 mag 10.53 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 21491+6648 : ALADIN DSS IMAGE @ 21h 49m 08.12s +66° 47' 31.9"
 
 
 
 
WDS 21491+6648 WAL 140 AC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21491+6648 WAL 140AC distance=0' 21511+6650 HU 972 distance=12' 21481+6625 MLB 270 distance=23' 21542+6644 LEP 103 distance=31' 21444+6621 MLB 269 distance=39' 21520+6723 TDT3201 distance=39' 21527+6724 SKF2743 distance=43' 21559+6626 CLL 17AB distance=46' 21559+6626 CLL 17AC distance=46' 21576+6708 HJ 1711AB distance=54' 21576+6708 ACA 8AC distance=54' 21430+6606 WNT 1AB distance=55' 21430+6606 WNT 1AC distance=55' 21430+6606 WNT 1AD distance=55' 21430+6606 WNT 1AE distance=55' 21430+6606 WNT 1AF distance=55' 21430+6606 LI 8AG distance=55' 21430+6606 KAT 1AH distance=55' 21430+6606 KAT 1AI distance=55' 21430+6606 KAT 1AJ distance=55' 21430+6606 KAT 1AK distance=55' 21430+6606 KAT 1AL distance=55' 21455+6745 HU 970 distance=62' 21572+6609 ARY 43 distance=62' 21580+6722 MLB 307BC distance=62' 21580+6722 MLB 307AB distance=63' 21459+6548 HJ 1696 distance=63' 21385+6636 LDS4902 distance=65' 21516+6545 STF2843AB distance=65' 21516+6545 STF2843AC distance=65' 21581+6729 LDS4932 distance=67' 21595+6620 MLB1095 distance=68' 21599+6719 TDT3280 distance=71' 21590+6605 TDT3273 distance=73' 21526+6535 GII 9 distance=76' 21530+6536 GII 10 distance=76' 21498+6802 MLB1094 distance=77' 21533+6535 GII 11 distance=77' 21554+6540 HU 1314 distance=78' 21365+6718 KPP4238 distance=80' 21561+6539 HU 974 distance=81' 21531+6806 STTA226BC distance=82' 21531+6806 STTA226BD distance=82' 21531+6806 STTA226AB distance=83' 21372+6604 HDS3077 distance=84' 22029+6716 MLB1096 distance=86' 21344+6644 STFA 57AB distance=88' 21344+6644 STFA 57AC distance=88' 21529+6523 STI1067 distance=88' 21569+6533 KPP4259 distance=89' 22038+6710 TDS1155 distance=89' 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 21491+6648 STF2836 AB 155 11.8
Show 21491+6648 WAL 140 AC 253 64.5
Show 21511+6650 HU 972 255 0.3 12
Show 21481+6625 MLB 270 265 1.6 23
Show 21542+6644 LEP 103 213 4.1 31
Show 21444+6621 MLB 269 4 2.3 39
Show 21520+6723 TDT3201 121 2.3 39
Show 21527+6724 SKF2743 122 19.3 43
Show 21559+6626 CLL 17 AB 68 37.0 46
Show 21559+6626 CLL 17 AC 241 35.6 46
Show 21576+6708 HJ 1711 AB 255 8.8 54
Show 21576+6708 ACA 8 AC 323 71.9 54
Show 21430+6606 WNT 1 AB 330 2.5 55
Show 21430+6606 WNT 1 AC 296 2.5 55
Show 21430+6606 WNT 1 AD 11 8.4 55
Show 21430+6606 WNT 1 AE 265 11.2 55
Show 21430+6606 WNT 1 AF 176 12.5 55
Show 21430+6606 LI 8 AG 123 6.5 55
Show 21430+6606 KAT 1 AH 205 10.7 55
Show 21430+6606 KAT 1 AI 204 6.4 55
Show 21430+6606 KAT 1 AJ 97 1.9 55
Show 21430+6606 KAT 1 AK 276 2.3 55
Show 21430+6606 KAT 1 AL 306 3.7 55
Show 21455+6745 HU 970 274 0.4 62
Show 21572+6609 ARY 43 127 101.0 62
Show 21580+6722 MLB 307 BC 152 3.1 62
Show 21580+6722 MLB 307 AB 194 62.0 63
Show 21459+6548 HJ 1696 130 17.3 63
Show 21385+6636 LDS4902 258 25.2 65
Show 21516+6545 STF2843 AB 150 1.4 65
Show 21516+6545 STF2843 AC 277 54.7 65
Show 21581+6729 LDS4932 85 122.6 67
Show 21595+6620 MLB1095 100 11.2 68
Show 21599+6719 TDT3280 122 0.5 71
Show 21590+6605 TDT3273 6 0.4 73
Show 21526+6535 GII 9 346 9.0 76
Show 21530+6536 GII 10 173 9.3 76
Show 21498+6802 MLB1094 229 8.5 77
Show 21533+6535 GII 11 52 6.2 77
Show 21554+6540 HU 1314 211 0.1 78
Show 21365+6718 KPP4238 336 12.9 80
Show 21561+6539 HU 974 101 4.5 81
Show 21531+6806 STTA226 BC 149 85.2 82
Show 21531+6806 STTA226 BD 169 50.2 82
Show 21531+6806 STTA226 AB 245 76.3 83
Show 21372+6604 HDS3077 273 0.1 84
Show 22029+6716 MLB1096 312 18.5 86
Show 21344+6644 STFA 57 AB 25 183.1 88
Show 21344+6644 STFA 57 AC 346 126.1 88
Show 21529+6523 STI1067 273 11.6 88
Show 21569+6533 KPP4259 17 52.4 89

 
 
WDS 21491+6648 : COMPONENTS
 
 
  A B
B pa=169.5°
sep=10.90"
 
C pa=232.5°
sep=30.65"
pa=253.2°
sep=27.49"
 
 
21491+6648 A
 
 
Name HD 207826 Coord arcsec 2000 214908.12+664731.9 Mag 6.53 Spectral class F4V (yellow-white)
PmRA -21.00 PmDE -66.0 SAO 19665 HIP 107710
Tycho2 4274-02376-1 HD 207826 GC 30574 BD BD+66 1441
Tycho2
Tycho2 4274-02376-1 Pflag RAmdeg 327.28366373 DEmdeg 66.79202415
PmRA -30.7 PmDE -70.2 E RAmdeg 4 E DEmdeg 4
E pmRA 1.0 E pmDE 1.1 EpRAm 1991.29 EpDEm 1991.45
Num 13 Q RAmdeg 1.0 Q DEmdeg 1.8 Q pmRA 1.0
Q pmDE 1.7 BTmag 6.917 E BTmag 0.015 VTmag 6.527
E VTmag 0.010 Prox 119 TYC T HIP 107710
CCDM A RAdeg 327.28384528 DEdeg 66.79218667 EpRA 1990 1.60
EpDE 1990 1.67 E RAdeg 3.7 E DEdeg 3.8 Posflg
Corr 0.1
SAO
SAO 19665 DelFlag RA1950 PmRA1950 -0.0044
DE1950 PmDE1950 -0.053 Vmag 6.5 SpType F2
Double code Source 70 CatNum 30574 DM BD+66 1441
DMcomp BDsup HD 207826 M HD 0
GC 30574 RA1950rad 5.70712845 DE1950rad 1.16168074 PmRA2000 -0.004
PmDE2000 -0.058
Hipparcos
Catalog H HIP 107710 Proxy RAhms 21 49 08.12
DEdms +66 47 31.9 Vmag 6.49 VarFlag R Vmag H
RAdeg 327.284 DEdeg 66.7922 AstroRef A Plx 10.37
CCDM 21491+6648 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual C M HIP AB
Theta 153 Rho 11.89 HD 207826 BD BD+66 1441
CD CP Dm number +66 1441 VIred 0.44
SpType F3IV R SpType Coord arcsec 2000 214908.12+664731.9
Hipparcos 2
HIP 107710 Sn 15 So 3 Nc 2
RArad 5.7121807578 DErad 1.1657436865 Plx 10.2 PmRA -20.42
PmDE -65.9 E RArad 0.44 E DErad 0.46 E Plx 0.51
E pmRA 0.65 E pmDE 0.59 Hpmag 6.5785 E Hpmag 0.0044
SHp 0.01 VA 0 BV 0.391 E BV 0.006
VI 0.46
CCDM
Ccdm 21491+6648 RComp Comp A Note1
Note2 Discov num DRAs 2.11 DDEs -28.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 6.6 Sp F2 PmNote *
PmRA -29 PmDE -61 Dm number +66 1441 Cat1 BD
Name2 +66 1070 Cat2 AGK2/3 HD 207826 M HD
ADS BDS A15366 M ADS BDS N IDS IDS 21468N6619A
HIC 107710
 
 
21491+6648 B
 
 
Coord arcsec 2000 214908.46+664721.2 Mag 10.36 PmRA -21.00 PmDE -66.0
Calc delta mag 3.83 Calc coord yes
CCDM
Ccdm 21491+6648 RComp Comp B Note1
Note2 Discov num STF2836 DRAs 3.01 DDEs -39.1
R dRAs 90 Year 1832 Theta 153 Rho 11.8
Obs 7 Vmag 9.6 Sp PmNote
PmRA -29 PmDE -61 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A15366 M ADS BDS N IDS IDS 21468N6619B
HIC
 
 
21491+6648 C
 
 
Coord arcsec 2000 214904.00+664713.3 Mag 10.53 PmRA -20.00 PmDE -8.0
Calc delta mag 4 Calc coord yes