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Doubles in session


Current system
21468+4919
MIU 3
Pi2 Cyg


Nearby doubles
24' : 21448+4931
ARG 43AB

30' : 21496+4908
DAM 297

36' : 21497+4857
ES 9011

36' : 21491+4852
DAM 296

39' : 21506+4908
ES 826

47' : 21476+4832
TDT3155

47' : 21515+4910
ES 9008

51' : 21514+4857
ES 9007

52' : 21415+4926
KPP4243

53' : 21414+4921
BU 373

58' : 21526+4909
COU2445

58' : 21449+4824
SLN 42

59' : 21408+4911
TDT3101

62' : 21432+4828
CBL 96

63' : 21425+4832
COU2313

65' : 21534+4921
ES 524AB

66' : 21495+5019
TDT3180

69' : 21399+4908
ES 825AB

70' : 21443+5024
TDT3128

72' : 21488+4810
KPP1210

77' : 21492+5031
STF2832AB

78' : 21511+5023
HU 694

78' : 21547+4916
ES 525

79' : 21487+5035
ES 1105AB

79' : 21526+5013
ES 1175

79' : 21390+4940
HJ 1674



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

21468+4919 MIU 3 (Pi2 Cyg)

 
 
21h 46m 47.61s +49° 18' 34.5" P.A. 129.00 sep 0.1 mag 4.44,5.98 Sp B3III dist. 338.98 pc (1105.75 l.y.)
 
 
Coord 2000 21468+4919 Discov num MIU   3 Comp Coord arcsec 2000 21 46 47.61 +49 18 34.5
Date first 1991 Date last 1996 Obs 4
Pa first 123 Pa last 129.4 P.A. Now (θ) 129.4°
Sep first 0.1 Sep last 0.105 Sep. Now (ρ) 0.105"
Mag pri 4.44 Mag sec 5.98 delta mag (ΔM) 1.54 Spectral class B3III (blue-white)
Pri motion ra +004 Sec motion ra
Pri motion dec -002 Sec motion dec
Notes N (See Notes)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Pi2 Cyg Constellation Cygnus SAO 51293 HIP 107533
Tycho2 3612-03062-1 Gaia DR2 1978185009394330240 HD 207330 HR 8335
GC 30512 BD BD+48 3504 Bayer Pi 2 Cygni Bayer name Pi2 Cyg
Flamsteed 81 Cygni Flamsteed name 81 Cyg FK5 821 Distance 338.98
Distance ly 1105.75 Bayer greek π2 Cyg
 
 
WDS 21468+4919 MIU 3 (Pi2 Cyg) : NOTES
 
 
discov_num notes refcode
MIU 3 pi 2 Cyg = 81 Cyg. Spectroscopic binary, P = 72d.
 
 
REFERENCES
 
 
refcode metd author reference
Miu1992 S j Miura, N., Baba, N., Ni-ino, M., Ohtsubo, J., Noguchi, M., & Isobe, S. 1992PASJ....2..561M
Miu1992 Pub. Natl. Astron. Obs. Japan 2, 561, 1992
Miu1993 S j Miura, N., Ni-ino, M., Baba, N., Iribe, T., & Isobe, S. 1993PASJ....3..153M
Miu1993 Pub. Natl. Astron. Obs. Japan 3, 153, 1993
Miu1995 S j Miura, N., Iribe, T., Kudo, T., Baba, N., & Isobe, S. 1995PASJ....4...67M
Miu1995 Pub. Natl. Astron. Obs. Japan 4, 67, 1995
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21468+4919 MIU 3 1996 4 129 0.1 4.44 5.98 B3III N 214647.61+491834.5

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

 
 
WDS 21468+4919 MIU 3 (Pi2 Cyg) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21468+4919 MIU 3 (Pi2 Cyg) : MEASURES
 
 
No records found.

 
 
WDS 21468+4919 (Pi2 Cyg) : VIRTUAL EYEPIECE
 
 

21468+4919 MIU 3A mag 4.44 Sp B3III 21468+4919 MIU 3B sep 0.1 P.A. 141.60 mag 5.98 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 21468+4919 (Pi2 Cyg) : ALADIN DSS IMAGE @ 21h 46m 47.61s +49° 18' 34.5"
 
 
 
 
WDS 21468+4919 MIU 3 (Pi2 Cyg) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21468+4919 MIU 3 distance=0' 21448+4931 ARG 43AB distance=24' 21448+4931 ARG 43BC distance=24' 21496+4908 DAM 297 distance=30' 21497+4857 ES 9011 distance=36' 21491+4852 DAM 296 distance=36' 21506+4908 ES 826 distance=39' 21476+4832 TDT3155 distance=47' 21515+4910 ES 9008 distance=47' 21514+4857 ES 9007 distance=51' 21415+4926 KPP4243 distance=52' 21414+4921 BU 373 distance=53' 21526+4909 COU2445 distance=58' 21449+4824 SLN 42 distance=58' 21408+4911 TDT3101 distance=59' 21432+4828 CBL 96 distance=62' 21425+4832 COU2313 distance=63' 21534+4921 ES 524BC distance=65' 21534+4921 ES 524AB distance=65' 21495+5019 TDT3180 distance=66' 21399+4908 ES 825AB distance=69' 21399+4908 ES 825AC distance=69' 21399+4908 ES 825AD distance=69' 21443+5024 TDT3128 distance=70' 21488+4810 KPP1210 distance=72' 21492+5031 STF2832BC distance=76' 21492+5031 STF2832AB distance=77' 21492+5031 CTT 10AD distance=77' 21492+5031 STF2832AC distance=77' 21511+5023 HU 694 distance=78' 21547+4916 ES 525 distance=78' 21487+5035 ES 1105AB distance=79' 21487+5035 ES 1105AC distance=79' 21526+5013 ES 1175 distance=79' 21390+4940 HJ 1674 distance=79' 21470+4759 A 773 distance=80' 21439+5034 HU 693 distance=81' 21539+4839 COU2321 distance=81' 21531+4826 COU2319AB distance=82' 21531+4826 GII 87AC distance=82' 21531+4826 COU2319AD distance=82' 21415+4817 KPP4242 distance=82' 21514+4811 TDT3198 distance=82' 21477+4759 COU2316AB distance=82' 21477+4759 GII 294Aa,Ab distance=82' 21417+5026 HJ 1684 distance=84' 21552+4938 RAO 467 distance=85' 21401+4824 HJ 1681AB distance=86' 21385+4955 HLD 47 distance=90' 21511+5040 ES 827 distance=92' 21415+5035 COU2444 distance=93' 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 21468+4919 MIU 3 129 0.1
Show 21448+4931 ARG 43 AB 20 29.2 24
Show 21448+4931 ARG 43 BC 91 6.9 24
Show 21496+4908 DAM 297 170 8.4 30
Show 21497+4857 ES 9011 216 5.5 36
Show 21491+4852 DAM 296 240 6.9 36
Show 21506+4908 ES 826 129 4.0 39
Show 21476+4832 TDT3155 40 0.8 47
Show 21515+4910 ES 9008 120 7.5 47
Show 21514+4857 ES 9007 102 6.7 51
Show 21415+4926 KPP4243 321 1.6 52
Show 21414+4921 BU 373 170 5.0 53
Show 21526+4909 COU2445 18 1.4 58
Show 21449+4824 SLN 42 120 14.6 58
Show 21408+4911 TDT3101 330 0.9 59
Show 21432+4828 CBL 96 117 46.6 62
Show 21425+4832 COU2313 55 0.4 63
Show 21534+4921 ES 524 BC 3 4.7 65
Show 21534+4921 ES 524 AB 188 20.9 65
Show 21495+5019 TDT3180 67 1.9 66
Show 21399+4908 ES 825 AB 257 12.1 69
Show 21399+4908 ES 825 AC 284 57.7 69
Show 21399+4908 ES 825 AD 11 20.6 69
Show 21443+5024 TDT3128 198 1.7 70
Show 21488+4810 KPP1210 256 9.4 72
Show 21492+5031 STF2832 BC 335 51.5 76
Show 21492+5031 STF2832 AB 213 13.2 77
Show 21492+5031 CTT 10 AD 104 125.2 77
Show 21492+5031 STF2832 AC 321 45.8 77
Show 21511+5023 HU 694 192 1.6 78
Show 21547+4916 ES 525 123 5.3 78
Show 21487+5035 ES 1105 AB 298 7.8 79
Show 21487+5035 ES 1105 AC 96 9.8 79
Show 21526+5013 ES 1175 211 9.9 79
Show 21390+4940 HJ 1674 328 11.1 79
Show 21470+4759 A 773 201 3.3 80
Show 21439+5034 HU 693 232 1.1 81
Show 21539+4839 COU2321 255 0.7 81
Show 21531+4826 COU2319 AB 59 0.8 82
Show 21531+4826 GII 87 AC 31 6.2 82
Show 21531+4826 COU2319 AD 88 2.4 82
Show 21415+4817 KPP4242 74 4.0 82
Show 21514+4811 TDT3198 335 0.6 82
Show 21477+4759 COU2316 AB 185 0.7 82
Show 21477+4759 GII 294 Aa,Ab 113 0.1 82
Show 21417+5026 HJ 1684 319 10.8 84
Show 21552+4938 RAO 467 204 3.4 85
Show 21401+4824 HJ 1681 AB 107 7.5 86
Show 21385+4955 HLD 47 227 6.4 90
Show 21511+5040 ES 827 242 3.1 92
Show 21415+5035 COU2444 340 0.6 93

 
 
WDS 21468+4919 : COMPONENTS
 
 
  A
B pa=141.6°
sep=0.09"
 
 
21468+4919 A
 
 
Componente originario normalizzato AB Name Pi2 Cyg Coord arcsec 2000 214647.61+491834.5 Mag 4.44
Spectral class B3III (blue-white) PmRA 4.00 PmDE -2.0 SAO 51293
HIP 107533 Tycho2 3612-03062-1 HD 207330 HR 8335
GC 30512 BD BD+48 3504 Bayer Pi 2 Cygni Bayer name Pi2 Cyg
Flamsteed 81 Cygni Flamsteed name 81 Cyg FK5 821
Tycho2
Tycho2 3612-03062-1 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 4.065 E BTmag 0.014 VTmag 4.208
E VTmag 0.009 Prox 999 TYC T HIP 107533
CCDM AB RAdeg 326.69835861 DEdeg 49.30957528 EpRA 1990 1.67
EpDE 1990 1.66 E RAdeg 3.2 E DEdeg 3.2 Posflg P
Corr 0.2
SAO
SAO 51293 DelFlag RA1950 PmRA1950 0.0002
DE1950 PmDE1950 0.003 Vmag 4.3 SpType B3
Double code Source 74 CatNum 821 DM BD+48 3504
DMcomp BDsup HD 207330 M HD 0
GC 30512 RA1950rad 5.69388649 DE1950rad 0.85656565 PmRA2000 0.0005
PmDE2000 -0.001
Hipparcos
Catalog H HIP 107533 Proxy H RAhms 21 46 47.61
DEdms +49 18 34.5 Vmag 4.23 VarFlag 1 R Vmag G
RAdeg 326.698 DEdeg 49.3096 AstroRef * Plx 2.82
CCDM 21468+4919 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 123 Rho 0.092 HD 207330 BD BD+48 3504
CD CP Dm number +48 3504 VIred -0.13
SpType B3III R SpType Coord arcsec 2000 214647.61+491834.5
Hipparcos 2
HIP 107533 Sn 55 So 3 Nc 2
RArad 5.7019620021 DErad 0.8606144297 Plx 2.95 PmRA 2.77
PmDE -2 E RArad 0.27 E DErad 0.27 E Plx 0.34
E pmRA 0.3 E pmDE 0.31 Hpmag 4.2016 E Hpmag 0.0005
SHp 0.005 VA 0 BV -0.12 E BV 0.008
VI -0.13
CCDM
Ccdm 21468+4919 RComp Comp A Note1
Note2 Discov num DRAs -0.39 DDEs -25.5
R dRAs 82 Year Theta Rho
Obs 2 Vmag 4.4 Sp B3 PmNote *
PmRA 4 PmDE -2 Dm number +48 3504 Cat1 BD
Name2 +49 1867 Cat2 AGK2/3 HD 207330 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 107533
 
 
21468+4919 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 214647.62+491834.4 Mag 5.98 Calc delta mag 1.54
Calc coord yes
CCDM
Ccdm 21468+4919 RComp Comp B Note1
Note2 Discov num HDS DRAs -0.38 DDEs -25.6
R dRAs 82 Year 1991 Theta 123 Rho 0.1
Obs 1 Vmag 6.0 Sp PmNote *
PmRA 4 PmDE -2 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 107533