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Doubles in session


Current system
20123-0806
BU 1205
HD 191841


Nearby doubles
18' : 20112-0758
RST4654

23' : 20127-0744
J 1699

36' : 20118-0731
TDT2076

37' : 20119-0730
A 2997

39' : 20125-0727
TDT2087

48' : 20112-0851
OUD 8

51' : 20131-0854
RST4054

58' : 20151-0727
KPP2772

59' : 20126-0904
SKF 444AB

62' : 20116-0705
TDT2070

62' : 20161-0744
HO 589AB

62' : 20133-0706
RST4655

64' : 20165-0817
UC 4134

78' : 20165-0719
UC 4133

81' : 20081-0714
UC 4095

84' : 20166-0712
JNN 125

88' : 20169-0712
J 2306

89' : 20169-0710
UC 4136

89' : 20182-0816
KPP4190

91' : 20109-0637
ARU 20

94' : 20069-0855
HDO 156AB

94' : 20153-0644
KPP4188

96' : 20120-0941
UC 4119

101' : 20073-0657
GWP2922

101' : 20158-0640
UC 4130

105' : 20094-0940
UC 4106



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.

20123-0806 BU 1205 (HD 191841)

 
 
20h 12m 15.32s -08° 05' 32.1" P.A. 212.00 sep 0.2 mag 7.50,8.80 Sp F5V dist. 73.91 pc (241.09 l.y.)
 
 
Coord 2000 20123-0806 Discov num BU 1205 Comp Coord arcsec 2000 20 12 15.32 -08 05 32.1
Date first 1890 Date last 2008 Obs 22
Pa first 49 Pa last 211.8 P.A. Now (θ) 211.8°
Sep first 0.6 Sep last 0.247 Sep. Now (ρ) 0.247"
Mag pri 7.50 Mag sec 8.80 delta mag (ΔM) 1.3 Spectral class F5V (yellow-white)
Pri motion ra +015 Sec motion ra
Pri motion dec -035 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 191841 Constellation Aquila SAO 144164 HIP 99558
Tycho2 5740-00887-1 Gaia DR2 4215770852139704960 HD 191841 GC 28034
ADS 13493 BD BD-08 5272 Distance 73.91 Distance ly 241.09
 
 
ORBITAL ELEMENTS
 
 
Period (P)139.9y Periastron (T)1983.5y Semi-major axis (a)0.486a
Eccentricity (e)0.384 Inclination (i)78.3° Longitude of periastron (ω)10.4°
Node (Ω)231.24° Notes ReferenceHrt2010a
Equinox2000 Last observation2008 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 341.4 0.086
2001 355.0 0.098
2002 5.1 0.115
2003 12.5 0.134
2004 18.1 0.154
2005 22.3 0.175
2006 25.7 0.196
2007 28.4 0.217
2008 30.6 0.238
2009 32.4 0.258
2010 34.0 0.279
2011 35.4 0.299
2012 36.6 0.318
2013 37.6 0.337
2014 38.6 0.356
2015 39.4 0.374
2016 40.2 0.392
2017 40.9 0.409
2018 41.6 0.426
2019 42.2 0.442
2020 42.7 0.457
2021 43.3 0.472
2022 43.7 0.486
2023 44.2 0.500
2024 44.7 0.514
2025 45.1 0.526
2026 45.5 0.538
2027 45.9 0.550
2028 46.2 0.561
2029 46.6 0.571
2030 46.9 0.581


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


 
  


wds20123-0806a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20123-0806 BU 1205 (HD 191841) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Hrt2010a orb - Hartkopf, W.I. & Mason, B.D. 2010IAUDS.170....1H
Hrt2010a Inf. Circ. 170, 1, 2010
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20123-0806 BU 1205 1991 21 249 0.2 7.50 8.80 F5V O 201215.32-080532.1
20123-0806 BU 1205 2008 22 212 0.2 7.50 8.80 F5V O 201215.32-080532.1

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

 
 
WDS 20123-0806 BU 1205 (HD 191841) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20123-0806 BU 1205 (HD 191841) : MEASURES
 
 
No records found.

 
 
WDS 20123-0806 (HD 191841) : VIRTUAL EYEPIECE
 
 

20123-0806 BU 1205A mag 7.5 Sp F5V 20123-0806 BU 1205B sep 0.2 P.A. 211.50 mag 8.8 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 20123-0806 (HD 191841) : ALADIN DSS IMAGE @ 20h 12m 15.32s -08° 05' 32.1"
 
 
 
 
WDS 20123-0806 BU 1205 (HD 191841) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20123-0806 BU 1205 distance=0' 20112-0758 RST4654 distance=18' 20127-0744 J 1699 distance=23' 20118-0731 TDT2076 distance=36' 20119-0730 A 2997 distance=37' 20125-0727 TDT2087 distance=39' 20112-0851 OUD 8 distance=48' 20131-0854 RST4054 distance=51' 20151-0727 KPP2772 distance=58' 20126-0904 SKF 444AB distance=59' 20116-0705 TDT2070 distance=62' 20161-0744 HO 589AB distance=62' 20161-0744 HO 589AC distance=62' 20133-0706 RST4655 distance=62' 20165-0817 UC 4134 distance=64' 20165-0719 UC 4133 distance=78' 20081-0714 UC 4095 distance=81' 20166-0712 JNN 125 distance=84' 20169-0712 J 2306 distance=88' 20169-0710 UC 4136 distance=89' 20182-0816 KPP4190 distance=89' 20109-0637 ARU 20 distance=91' 20069-0855 HDO 156AB distance=94' 20069-0855 HDO 156AC distance=94' 20153-0644 KPP4188 distance=94' 20120-0941 UC 4119 distance=96' 20073-0657 GWP2922 distance=101' 20158-0640 UC 4130 distance=101' 20094-0940 UC 4106 distance=105' 20144-0947 J 1770 distance=106' 20152-0944 AHD 15 distance=107' 20146-0949 UC 4126 distance=109' 20187-0710 J 2309 distance=109' 20094-0946 UC 4107 distance=109' 20198-0827 LDS1468 distance=114' 20167-0630 J 1388 distance=117' 20046-0744 LDS4829 distance=117' 20116-0609 BU 833AB distance=117' 20116-0609 BU 833AD distance=117' 20116-0609 BU 833BC distance=118' 20063-0932 RST4652 distance=123' 20144-0603 STF2646AB distance=127' 20144-0603 STF2646BC distance=128' 20208-0745 SCJ 25 distance=129' 20150-0557 RST4657 distance=135' 20076-0606 LDS4832 distance=138' 20217-0745 HO 277 distance=142' 20196-0632 LDS4837 distance=145' 20113-0542 GWP2925 distance=145' 20188-0614 RST4660 distance=149' 20203-0935 GWP2940 distance=150' 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 20123-0806 BU 1205 212 0.2
Show 20112-0758 RST4654 330 1.2 18
Show 20127-0744 J 1699 31 4.5 23
Show 20118-0731 TDT2076 138 1.7 36
Show 20119-0730 A 2997 60 1.9 37
Show 20125-0727 TDT2087 83 1.0 39
Show 20112-0851 OUD 8 150 3.5 48
Show 20131-0854 RST4054 4 2.2 51
Show 20151-0727 KPP2772 219 26.7 58
Show 20126-0904 SKF 444 AB 39 8.5 59
Show 20116-0705 TDT2070 62 0.5 62
Show 20161-0744 HO 589 AB 329 15.7 62
Show 20161-0744 HO 589 AC 200 55.3 62
Show 20133-0706 RST4655 132 2.0 62
Show 20165-0817 UC 4134 79 46.5 64
Show 20165-0719 UC 4133 199 58.8 78
Show 20081-0714 UC 4095 92 19.3 81
Show 20166-0712 JNN 125 273 0.2 84
Show 20169-0712 J 2306 62 5.2 88
Show 20169-0710 UC 4136 79 55.4 89
Show 20182-0816 KPP4190 349 2.5 89
Show 20109-0637 ARU 20 138 0.5 91
Show 20069-0855 HDO 156 AB 89 6.6 94
Show 20069-0855 HDO 156 AC 54 8.3 94
Show 20153-0644 KPP4188 151 2.0 94
Show 20120-0941 UC 4119 14 51.3 96
Show 20073-0657 GWP2922 244 31.4 101
Show 20158-0640 UC 4130 12 77.6 101
Show 20094-0940 UC 4106 108 11.5 105
Show 20144-0947 J 1770 137 6.1 106
Show 20152-0944 AHD 15 143 11.1 107
Show 20146-0949 UC 4126 190 142.0 109
Show 20187-0710 J 2309 323 6.1 109
Show 20094-0946 UC 4107 192 47.9 109
Show 20198-0827 LDS1468 31 9.0 114
Show 20167-0630 J 1388 4 4.6 117
Show 20046-0744 LDS4829 322 73.0 117
Show 20116-0609 BU 833 AB 63 127.0 117
Show 20116-0609 BU 833 AD 352 43.6 117
Show 20116-0609 BU 833 BC 63 2.8 118
Show 20063-0932 RST4652 232 5.1 123
Show 20144-0603 STF2646 AB 40 17.8 127
Show 20144-0603 STF2646 BC 106 26.9 128
Show 20208-0745 SCJ 25 215 2.8 129
Show 20150-0557 RST4657 257 0.5 135
Show 20076-0606 LDS4832 296 221.4 138
Show 20217-0745 HO 277 68 3.0 142
Show 20196-0632 LDS4837 145 28.9 145
Show 20113-0542 GWP2925 158 51.2 145
Show 20188-0614 RST4660 106 0.5 149
Show 20203-0935 GWP2940 264 408.2 150

 
 
WDS 20123-0806 : COMPONENTS
 
 
  A
B pa=211.5°
sep=0.25"
 
 
20123-0806 A
 
 
Componente originario normalizzato AB Name HD 191841 Coord arcsec 2000 201215.32-080532.1 Mag 7.5
Spectral class F5V (yellow-white) PmRA 15.00 PmDE -35.0 SAO 144164
HIP 99558 Tycho2 5740-00887-1 HD 191841 GC 28034
BD BD-08 5272
Tycho2
Tycho2 5740-00887-1 Pflag RAmdeg 303.06385908 DEmdeg -8.09232342
PmRA 7.1 PmDE -34.4 E RAmdeg 4 E DEmdeg 5
E pmRA 1.2 E pmDE 1.2 EpRAm 1991.30 EpDEm 1990.80
Num 13 Q RAmdeg 0.5 Q DEmdeg 1.6 Q pmRA 0.6
Q pmDE 1.5 BTmag 7.832 E BTmag 0.015 VTmag 7.364
E VTmag 0.011 Prox 999 TYC T HIP 99558
CCDM RAdeg 303.06384250 DEdeg -8.09224056 EpRA 1990 1.66
EpDE 1990 1.30 E RAdeg 4.2 E DEdeg 5.1 Posflg
Corr -0.2
SAO
SAO 144164 DelFlag RA1950 PmRA1950 -0.0006
DE1950 PmDE1950 -0.015 Vmag 7.2 SpType F8
Double code Source 70 CatNum 28034 DM BD-08 5272
DMcomp BDsup HD 191841 M HD 0
GC 28034 RA1950rad 5.27768552 DE1950rad -0.14385118 PmRA2000 -0.0004
PmDE2000 -0.016
Hipparcos
Catalog H HIP 99558 Proxy RAhms 20 12 15.32
DEdms -08 05 32.1 Vmag 7.32 VarFlag R Vmag H
RAdeg 303.064 DEdeg -8.09224 AstroRef Plx 12.22
CCDM 20123-0806 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD 191841 BD BD-08 5272
CD CP Dm number -08 5272 VIred 0.48
SpType F8 R SpType Coord arcsec 2000 201215.32-080532.1
Hipparcos 2
HIP 99558 Sn 5 So 0 Nc 1
RArad 5.2894619532 DErad -0.1412362472 Plx 13.53 PmRA 3.63
PmDE -37.09 E RArad 0.63 E DErad 0.37 E Plx 0.75
E pmRA 0.85 E pmDE 0.68 Hpmag 7.4225 E Hpmag 0.001
SHp 0.008 VA 0 BV 0.435 E BV 0.009
VI 0.5
CCDM
Ccdm 20123-0806 RComp Comp A Note1
Note2 Discov num DRAs -2.78 DDEs 29.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.5 Sp F8 PmNote *
PmRA -9 PmDE -15 Dm number -08 5272 Cat1 BD
Name2 144164 Cat2 SAO HD 191841 M HD
ADS BDS A13493 M ADS BDS N IDS IDS 20069S0823A
HIC 99558
 
 
20123-0806 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 201215.31-080532.3 Mag 8.8 Calc delta mag 1.3
Calc coord yes
CCDM
Ccdm 20123-0806 RComp Comp B Note1
Note2 Discov num BU 1205 DRAs DDEs
R dRAs Year 1952 Theta 095 Rho 0.2
Obs 9 Vmag 8.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13493 M ADS BDS N N IDS IDS 20069S0823B
HIC 99558