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Doubles in session


Current system
20329+4154
BLA 8
HD 195987


Nearby doubles
7' : 20323+4152
BU 434

11' : 20331+4144
CAN 45AB

16' : 20316+4149
TDT2338

17' : 20315+4148
BRT2265

17' : 20317+4143
HJ 1530

20' : 20335+4136
CAN 59AB

22' : 20311+4203
CAN 25AB

22' : 20334+4133
CAN 7AB

23' : 20341+4137
CAN 70

24' : 20338+4133
CAN 9AB

25' : 20342+4135
CAN 72AB

25' : 20342+4134
CAN 71AB

25' : 20324+4130
CAN 37AB

26' : 20337+4130
CAN 64AB

26' : 20325+4129
CAN 39AB

26' : 20349+4143
STU 13

27' : 20312+4137
J 1196

28' : 20322+4127
MZA 24AB

28' : 20326+4125
CAN 40AB

28' : 20325+4126
CAN 38AB

28' : 20318+4128
CAN 34AB

28' : 20314+4131
CAN 31AB

29' : 20328+4126
CAN 41AB

29' : 20345+4132
CAN 73AB

29' : 20312+4132
CAN 3AB

30' : 20323+4126
CAN 36AB



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.

20329+4154 BLA 8 (HD 195987)

 
 
20h 32m 51.64s +41° 53' 54.5" P.A. 336.00 sep 0.0 mag 7.40,9.10 Sp G9V dist. 22.05 pc (71.93 l.y.)
 
 
Coord 2000 20329+4154 Discov num BLA   8 Comp Coord arcsec 2000 20 32 51.64 +41 53 54.5
Date first 1986 Date last 2014 Obs 6
Pa first 167 Pa last 336.3 P.A. Now (θ) 336.3°
Sep first 0.0 Sep last 0.013 Sep. Now (ρ) 0.013"
Mag pri 7.40 Mag sec 9.10 delta mag (ΔM) 1.7 Spectral class G9V (yellow)
Pri motion ra -153 Sec motion ra
Pri motion dec +457 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 195987 Constellation Cygnus SAO 49769 HIP 101382
Tycho2 3161-00779-1 HD 195987 GC 28603 GL Gl 793.1
BD BD+41 3799 Distance 22.05 Distance ly 71.93
 
 
ORBITAL ELEMENTS
 
 
Period (P)57.322d± 0.0002 Periastron (T)51353.81d (1999.478y)± 0.04 Semi-major axis (a)15.2m± 0.3
Eccentricity (e)0.306± 0.001 Inclination (i)100°± 6.3 Longitude of periastron (ω)357.4°± 0.3
Node (Ω)330.9°± 3.6 Notesn ReferenceRen2010
Equinox2000 Last observation1991 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 159.1 0.014
2001-01-01 142.5 0.014
2002-01-01 321.3 0.008
2003-01-01 153.5 0.019
2004-01-01 118.6 0.005
2005-01-01 197.3 0.003
2006-01-01 149.4 0.019
2007-01-01 342.9 0.007
2008-01-01 161.1 0.013
2009-01-01 144.2 0.015
2010-01-01 325.7 0.010
2011-01-01 154.5 0.018
2012-01-01 129.8 0.007
2013-01-01 244.4 0.002
2014-01-01 150.3 0.020
2015-01-01 351.9 0.005
2016-01-01 163.7 0.011
2017-01-01 145.6 0.017
2018-01-01 329.1 0.010
2019-01-01 155.6 0.017
2020-01-01 135.6 0.009
2021-01-01 291.2 0.003
2022-01-01 151.2 0.020
2023-01-01 12.2 0.003
2024-01-01 167.6 0.009
2025-01-01 146.8 0.018
2026-01-01 332.4 0.010
2027-01-01 156.8 0.016
2028-01-01 139.1 0.011
2029-01-01 310.0 0.005
2030-01-01 152.1 0.020


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


 
  


wds20329%2B4154a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20329+4154 BLA 8 (HD 195987) : NOTES
 
 
discov_num notes refcode
BLA 8 Hipparcos astrometric solution adopted some elements from the orbit of HIP1997d
Duquennoy & Mayor (1991). Duq1991
Combined spectroscopic/interferometric orbit by Torres et al. (2002), Trr2002
including visibility data from the Palomar Testbed Interferometer.
Additional elements for this metal-poor binary are:
gamma = -5.841 0.037 km/sec
KA = 28.926 0.046 km/sec
KB = 36.72 0.21 km/sec
dm = 1.056 0.013 mag (K band)
1.154 0.065 mag (H band)
parallax = 46.08 0.27 mas
masses = 0.844 0.018 Msun
0.6650 0.0079 Msun
Orbit determined by fitting revised Hipparcos intermediate astrometric
data. Derived component masses 0.84 +/- 0.05 and 0.67 +/- 0.04 Msun. Ren2010
Improved resolved SB2 orbit for this pair. Kie2018
A: Teff = 5296 +/- 19 K, M = 0.8420 +/- 0.0014 \msun.
B: Teff = 4360 +/- 87 K, M = 0.66201 +/- 0.00076 \msun.
Orbital parallax = 46.131 +/- 0.084 mas.
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 1.58 +/- 0.05, 1.73, and 0.88 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Duq1991 - Duquennoy, A. & Mayor, M. 1991A&A...248..485D
Duq1991 A&A 248, 485, 1991
HIP1997d orb - Hipparcos 1997yCat.1239....0E
HIP1997d Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d (DMSA/O Orbital Solutions)
Kie2018 orb - Kiefer, F., Halbwachs, J.-L., Lebreton, Y., Soubiran, C., Arenou, F., Pourbaix, D., 2018MNRAS.474..731K
Kie2018 +not Famaey, B., Guillout, P., Ibata, R. & Mazeh, T.
Kie2018 MNRAS 474, 731, 2018
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Ren2010 orb - Ren, S. & Fu, Y. 2010AJ....139.1975R
Ren2010 AJ 139, 1975, 2010
Trr2002 orb - Torres, G., Boden, A.F., Latham, D.W., Pan, W., & Stefanik, R.P. 2002AJ....124.1716T
Trr2002 AJ 124, 1716, 2002
 
 
DISCOVERER
 
 
idgroup discov author
1 BLA Blazit, A., Bonneau, D., Koechlin, L. & Labeyrie, A.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20329+4154 BLA 8 1986 1 170 0.0 7.09   G9V NO 203251.64+415354.5
20329+4154 BLA 8 2007 2 296 0.0 7.09   G9V NOD 203251.64+415354.5
20329+4154 BLA 8 2014 5 336 0.0 7.40 9.10 G9V NO 203251.64+415354.5

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

 
 
WDS 20329+4154 BLA 8 (HD 195987) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20329+4154 BLA 8 (HD 195987) : MEASURES
 
 
No records found.

 
 
WDS 20329+4154 (HD 195987) : VIRTUAL EYEPIECE
 
 

20329+4154 BLA 8A mag 7.4 Sp G9V 20329+4154 BLA 8B mag 9.1 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 20329+4154 (HD 195987) : ALADIN DSS IMAGE @ 20h 32m 51.64s +41° 53' 54.5"
 
 
 
 
WDS 20329+4154 BLA 8 (HD 195987) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20329+4154 BLA 8 distance=0' 20323+4152 BU 434 distance=7' 20331+4144 CAN 45AB distance=11' 20331+4144 CAN 45AC distance=11' 20331+4144 CAN 45AD distance=11' 20331+4144 CAN 45AE distance=11' 20331+4144 CAN 45AF distance=11' 20331+4144 CAN 45AG distance=11' 20331+4144 CAN 45AH distance=11' 20331+4144 CAN 45AI distance=11' 20331+4144 CAN 45AJ distance=11' 20331+4144 CAN 45AK distance=11' 20316+4149 TDT2338 distance=16' 20315+4148 BRT2265 distance=17' 20317+4143 HJ 1530 distance=17' 20335+4136 CAN 59AB distance=20' 20335+4136 CAN 59AC distance=20' 20335+4136 CAN 59AD distance=20' 20311+4203 CAN 2Aa,Ab distance=22' 20311+4203 CAN 25AB distance=22' 20334+4133 CAN 7AB distance=22' 20334+4133 CAN 57AC distance=22' 20334+4133 CAN 57AD distance=22' 20334+4133 CAN 57AE distance=22' 20334+4133 CAN 57AF distance=22' 20341+4137 CAN 70 distance=23' 20338+4133 CAN 9AB distance=24' 20338+4133 CAN 65AC distance=24' 20338+4133 CAN 65AD distance=24' 20338+4133 CIA 35Aa,Ab distance=24' 20342+4135 CAN 72AB distance=25' 20342+4135 CAN 72AC distance=25' 20342+4134 CAN 71AB distance=25' 20342+4134 CAN 71AC distance=25' 20324+4130 CAN 37AB distance=25' 20324+4130 CAN 37AC distance=25' 20324+4130 CAN 37AD distance=25' 20324+4130 CAN 37AE distance=25' 20324+4130 CAN 37AF distance=25' 20324+4130 CAN 37AG distance=25' 20324+4130 CAN 37AH distance=25' 20324+4130 CAN 37AI distance=25' 20324+4130 CAN 37AJ distance=25' 20324+4130 CAN 37AK distance=25' 20324+4130 CAN 37AL distance=25' 20324+4130 CAN 37AM distance=25' 20324+4130 CAN 37AN distance=25' 20324+4130 CAN 37AO distance=25' 20324+4130 CAN 37AP distance=25' 20324+4130 CAN 37AQ distance=25' 20324+4130 CAN 37AR distance=25' 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 20329+4154 BLA 8 336 0.0
Show 20323+4152 BU 434 103 1.4 7
Show 20331+4144 CAN 45 AB 167 1.8 11
Show 20331+4144 CAN 45 AC 32 7.4 11
Show 20331+4144 CAN 45 AD 238 8.0 11
Show 20331+4144 CAN 45 AE 159 8.2 11
Show 20331+4144 CAN 45 AF 158 8.3 11
Show 20331+4144 CAN 45 AG 287 10.6 11
Show 20331+4144 CAN 45 AH 114 11.5 11
Show 20331+4144 CAN 45 AI 86 12.6 11
Show 20331+4144 CAN 45 AJ 122 12.3 11
Show 20331+4144 CAN 45 AK 347 15.0 11
Show 20316+4149 TDT2338 200 2.5 16
Show 20315+4148 BRT2265 285 5.4 17
Show 20317+4143 HJ 1530 242 16.2 17
Show 20335+4136 CAN 59 AB 253 3.9 20
Show 20335+4136 CAN 59 AC 279 6.8 20
Show 20335+4136 CAN 59 AD 193 7.2 20
Show 20311+4203 CAN 2 Aa,Ab 258 0.3 22
Show 20311+4203 CAN 25 AB 221 4.2 22
Show 20334+4133 CAN 7 AB 48 1.4 22
Show 20334+4133 CAN 57 AC 280 4.1 22
Show 20334+4133 CAN 57 AD 134 5.2 22
Show 20334+4133 CAN 57 AE 357 7.0 22
Show 20334+4133 CAN 57 AF 227 12.8 22
Show 20341+4137 CAN 70 242 11.3 23
Show 20338+4133 CAN 9 AB 246 0.2 24
Show 20338+4133 CAN 65 AC 179 0.7 24
Show 20338+4133 CAN 65 AD 351 4.2 24
Show 20338+4133 CIA 35 Aa,Ab 339 0.0 24
Show 20342+4135 CAN 72 AB 261 2.8 25
Show 20342+4135 CAN 72 AC 85 11.4 25
Show 20342+4134 CAN 71 AB 52 5.9 25
Show 20342+4134 CAN 71 AC 127 13.1 25
Show 20324+4130 CAN 37 AB 251 1.7 25
Show 20324+4130 CAN 37 AC 351 3.6 25
Show 20324+4130 CAN 37 AD 248 5.3 25
Show 20324+4130 CAN 37 AE 210 5.8 25
Show 20324+4130 CAN 37 AF 244 6.5 25
Show 20324+4130 CAN 37 AG 200 6.9 25
Show 20324+4130 CAN 37 AH 242 7.0 25
Show 20324+4130 CAN 37 AI 202 7.4 25
Show 20324+4130 CAN 37 AJ 277 7.7 25
Show 20324+4130 CAN 37 AK 340 8.1 25
Show 20324+4130 CAN 37 AL 237 9.0 25
Show 20324+4130 CAN 37 AM 237 9.6 25
Show 20324+4130 CAN 37 AN 14 9.7 25
Show 20324+4130 CAN 37 AO 253 9.9 25
Show 20324+4130 CAN 37 AP 157 9.9 25
Show 20324+4130 CAN 37 AQ 348 10.0 25
Show 20324+4130 CAN 37 AR 350 10.4 25

 
 
WDS 20329+4154 : COMPONENTS
 
 
  A
B pa=341.9°
sep=0.01"
 
 
20329+4154 A
 
 
Componente originario normalizzato AB Name HD 195987 Coord arcsec 2000 203251.64+415354.5 Mag 7.4
Spectral class G9V (yellow) PmRA -153.00 PmDE 457.0 SAO 49769
HIP 101382 Tycho2 3161-00779-1 HD 195987 GC 28603
BD BD+41 3799
Tycho2
Tycho2 3161-00779-1 Pflag RAmdeg 308.21518294 DEmdeg 41.89848206
PmRA -154.3 PmDE 454.5 E RAmdeg 4 E DEmdeg 4
E pmRA 0.9 E pmDE 0.9 EpRAm 1991.30 EpDEm 1991.37
Num 12 Q RAmdeg 1.0 Q DEmdeg 1.0 Q pmRA 1.1
Q pmDE 1.1 BTmag 8.063 E BTmag 0.015 VTmag 7.151
E VTmag 0.010 Prox 999 TYC T HIP 101382
CCDM RAdeg 308.21566750 DEdeg 41.89742389 EpRA 1990 1.59
EpDE 1990 1.62 E RAdeg 4.3 E DEdeg 4.2 Posflg
Corr 0.1
SAO
SAO 49769 DelFlag RA1950 PmRA1950 -0.0147
DE1950 PmDE1950 0.45 Vmag 7 SpType G5
Double code Source 70 CatNum 28603 DM BD+41 3799
DMcomp BDsup HD 195987 M HD 0
GC 28603 RA1950rad 5.37165791 DE1950rad 0.72816378 PmRA2000 -0.0146
PmDE2000 0.447
Hipparcos
Catalog H HIP 101382 Proxy RAhms 20 32 51.76
DEdms +41 53 50.6 Vmag 7.08 VarFlag R Vmag G
RAdeg 308.216 DEdeg 41.8974 AstroRef + Plx 44.99
CCDM N CCDM Nsys Ncomp 1
MultFlag O Source Qual M HIP
Theta Rho HD 195987 BD BD+41 3799
CD CP Dm number +41 3799 VIred 0.83
SpType G9V R SpType Coord arcsec 2000 203251.76+415350.6
Hipparcos 2
HIP 101382 Sn 75 So 4 Nc 1
RArad 5.3793785478 DErad 0.7312471905 Plx 45.35 PmRA -156.76
PmDE 452.84 E RArad 0.33 E DErad 0.32 E Plx 0.43
E pmRA 0.34 E pmDE 0.34 Hpmag 7.2057 E Hpmag 0.0008
SHp 0.009 VA 0 BV 0.796 E BV 0.007
VI 0.84
CCDM
Ccdm 20329+4154 RComp Comp A Note1
Note2 Discov num DRAs -2.39 DDEs -5.3
R dRAs 81 Year Theta Rho
Obs 2 Vmag 7.1 Sp G9 PmNote @
PmRA -160 PmDE 456 Dm number +41 3799 Cat1 BD
Name2 +41 1923 Cat2 AGK2/3 HD 195987 M HD
ADS BDS M ADS BDS N IDS W IDS 20329+4154A
HIC 101382
 
 
20329+4154 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 203251.64+415354.5 Mag 9.1 Calc delta mag 1.7
Calc coord yes
CCDM
Ccdm 20329+4154 RComp Comp B Note1
Note2 Discov num BLA DRAs DDEs
R dRAs Year 1986 Theta 170 Rho 0.0
Obs 1 Vmag Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS W IDS 20329+4154B
HIC 101382