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Doubles in session


Current system
19549+5049
HU 687
HD 188871


Nearby doubles
13' : 19546+5037
ES 797

33' : 19516+5046
HU 686

39' : 19577+5118
HU 689

39' : 19509+5056
TDT1798

41' : 19591+5040
HJ 1464

49' : 19513+5015
TDT1805

52' : 19507+5120
ES 796

62' : 19498+5011
JKA 88

66' : 19487+5118
HEI 907

66' : 19510+5143
TDT1800

69' : 19477+5046
DEA 371

69' : 19480+5029
DEA 157

70' : 19546+4940
TDS1023

71' : 19480+5022
KOI 129

72' : 19535+4939
ARG 87

72' : 19474+5042
KOI2290

73' : 19564+5200
KPP3350

73' : 19487+5009
KOI3471

74' : 19571+4939
HDS2839

75' : 19537+4936
ES 2685

75' : 19492+4959
KOI2173

75' : 20014+5006
H 5 47AB

77' : 19510+4942
KOI5928

78' : 19468+5057
TDT1735

78' : 19492+4954
HDS2820

80' : 19471+5023
JKA 80



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.

19549+5049 HU 687 (HD 188871)

 
 
19h 54m 56.19s +50° 49' 11.9" P.A. 27.00 sep 0.2 mag 8.54,8.63 Sp A0 dist. 256.41 pc (836.41 l.y.)
 
 
Coord 2000 19549+5049 Discov num HU  687 Comp Coord arcsec 2000 19 54 56.19 +50 49 11.9
Date first 1904 Date last 2008 Obs 45
Pa first 93 Pa last 26.9 P.A. Now (θ) 45°
Sep first 0.2 Sep last 0.196 Sep. Now (ρ) 0.201"
Mag pri 8.54 Mag sec 8.63 delta mag (ΔM) 0.09 Spectral class A0 (white)
Pri motion ra +005 Sec motion ra
Pri motion dec +025 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 188871 Constellation Cygnus SAO 32104 HIP 97997
Tycho2 3570-00245-1 Gaia DR2 2088834258965337216 HD 188871 ADS 13135
BD BD+50 2920 Distance 256.41 Distance ly 836.41
 
 
ORBITAL ELEMENTS
 
 
Period (P)154.6y Periastron (T)1960.63y Semi-major axis (a)0.159a
Eccentricity (e)0.321 Inclination (i)36.2° Longitude of periastron (ω)218.9°
Node (Ω)28.9° Notesn ReferenceDoc2017f
Equinox2000 Last observation2008 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 16.5 0.174
2001 18.0 0.176
2002 19.4 0.178
2003 20.8 0.180
2004 22.2 0.182
2005 23.6 0.184
2006 24.9 0.185
2007 26.2 0.187
2008 27.5 0.188
2009 28.7 0.190
2010 30.0 0.191
2011 31.2 0.192
2012 32.4 0.194
2013 33.6 0.195
2014 34.8 0.196
2015 35.9 0.197
2016 37.1 0.197
2017 38.2 0.198
2018 39.4 0.199
2019 40.5 0.199
2020 41.6 0.200
2021 42.8 0.200
2022 43.9 0.200
2023 45.0 0.201
2024 46.1 0.201
2025 47.3 0.201
2026 48.4 0.201
2027 49.5 0.201
2028 50.6 0.200
2029 51.7 0.200
2030 52.8 0.200


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


 
  


wds19549%2B5049b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 19549+5049 HU 687 (HD 188871) : NOTES
 
 
discov_num notes refcode
HU 687 Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 2.34 +/- 1.68, 4.56, and 2.24 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Doc2017f orb - Docobo, J.A. & Campo, P. 2017IAUDS.192Q...1D
Doc2017f Inf. Circ. 192, 1, 2017
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
 
 
DISCOVERER
 
 
idgroup discov author
1 HU Hussey, W.F.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19549+5049 HU 687 2001 41 20 0.2 8.54 8.63 A0 NOD 195456.19+504911.9
19549+5049 HU 687 2006 42 25 0.2 8.54 8.63 A0 NOD 195456.19+504911.9
19549+5049 HU 687 2008 43 27 0.2 8.54 8.63 A0 NOD 195456.19+504911.9

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

 
 
WDS 19549+5049 HU 687 (HD 188871) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 19549+5049 HU 687 (HD 188871) : MEASURES
 
 
No records found.

 
 
WDS 19549+5049 (HD 188871) : VIRTUAL EYEPIECE
 
 

19549+5049 HU 687A mag 8.54 Sp A0 19549+5049 HU 687B sep 0.2 P.A. 17.80 mag 8.63 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 19549+5049 (HD 188871) : ALADIN DSS IMAGE @ 19h 54m 56.19s +50° 49' 11.9"
 
 
 
 
WDS 19549+5049 HU 687 (HD 188871) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

19549+5049 HU 687 distance=0' 19546+5037 ES 797 distance=13' 19516+5046 HU 686 distance=33' 19577+5118 HU 689 distance=39' 19509+5056 TDT1798 distance=39' 19591+5040 HJ 1464 distance=41' 19513+5015 TDT1805 distance=49' 19507+5120 ES 796 distance=52' 19498+5011 JKA 88 distance=62' 19487+5118 HEI 907 distance=66' 19510+5143 TDT1800 distance=66' 19477+5046 DEA 371 distance=69' 19480+5029 DEA 157 distance=69' 19546+4940 TDS1023 distance=70' 19480+5022 KOI 129 distance=71' 19535+4939 ARG 87 distance=72' 19474+5042 KOI2290 distance=72' 19564+5200 KPP3350 distance=73' 19487+5009 KOI3471 distance=73' 19571+4939 HDS2839 distance=74' 19537+4936 ES 2685 distance=75' 19492+4959 KOI2173 distance=75' 20014+5006 H 5 47AB distance=75' 20014+5006 H 5 47AE distance=75' 20014+5006 H 5 47BC distance=76' 20014+5006 H 5 47BD distance=76' 19510+4942 KOI5928 distance=77' 19468+5057 TDT1735 distance=78' 19492+4954 HDS2820 distance=78' 19471+5023 JKA 80 distance=80' 19466+5101 JKA 79 distance=80' 19468+5051 ES 795AB distance=80' 19468+5051 ES 795AC distance=80' 19468+5051 ES 795AD distance=80' 19486+4958 JKA 83 distance=80' 19509+4938 KOI 356AB distance=81' 19509+4938 KOI 356AC distance=81' 19498+5155 AZC 179 distance=82' 20032+5028 HO 454 distance=82' 19491+4949 JKA 85 distance=83' 19507+5203 KPP1609 distance=84' 19471+5011 KOI2779 distance=84' 19463+5114 DEA 117 distance=86' 19499+4937 KOI 365AB distance=87' 19455+5046 WFC 225 distance=90' 19511+4927 KOI 540 distance=91' 19539+4918 ACA 2 distance=92' 19459+5017 KOI7496 distance=93' 19478+5154 AG 239 distance=93' 19456+5121 KOI 439AB distance=94' 19455+5119 KOI 790 distance=95' 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 19549+5049 HU 687 27 0.2
Show 19546+5037 ES 797 154 4.6 13
Show 19516+5046 HU 686 160 4.9 33
Show 19577+5118 HU 689 330 0.1 39
Show 19509+5056 TDT1798 85 0.6 39
Show 19591+5040 HJ 1464 41 12.8 41
Show 19513+5015 TDT1805 254 0.8 49
Show 19507+5120 ES 796 19 6.1 52
Show 19498+5011 JKA 88 43 5.7 62
Show 19487+5118 HEI 907 177 1.5 66
Show 19510+5143 TDT1800 238 0.8 66
Show 19477+5046 DEA 371 113 17.5 69
Show 19480+5029 DEA 157 334 7.5 69
Show 19546+4940 TDS1023 347 2.1 70
Show 19480+5022 KOI 129 221 2.1 71
Show 19535+4939 ARG 87 271 14.8 72
Show 19474+5042 KOI2290 220 0.3 72
Show 19564+5200 KPP3350 234 1.4 73
Show 19487+5009 KOI3471 229 0.5 73
Show 19571+4939 HDS2839 80 0.6 74
Show 19537+4936 ES 2685 250 32.9 75
Show 19492+4959 KOI2173 287 5.2 75
Show 20014+5006 H 5 47 AB 150 41.8 75
Show 20014+5006 H 5 47 AE 343 168.3 75
Show 20014+5006 H 5 47 BC 76 8.8 76
Show 20014+5006 H 5 47 BD 258 9.4 76
Show 19510+4942 KOI5928 37 3.4 77
Show 19468+5057 TDT1735 286 2.4 78
Show 19492+4954 HDS2820 60 0.6 78
Show 19471+5023 JKA 80 180 43.0 80
Show 19466+5101 JKA 79 166 470.2 80
Show 19468+5051 ES 795 AB 330 4.2 80
Show 19468+5051 ES 795 AC 48 15.2 80
Show 19468+5051 ES 795 AD 53 26.0 80
Show 19486+4958 JKA 83 325 31.2 80
Show 19509+4938 KOI 356 AB 217 0.5 81
Show 19509+4938 KOI 356 AC 228 4.1 81
Show 19498+5155 AZC 179 234 23.1 82
Show 20032+5028 HO 454 53 5.9 82
Show 19491+4949 JKA 85 196 6.9 83
Show 19507+5203 KPP1609 93 12.2 84
Show 19471+5011 KOI2779 61 1.0 84
Show 19463+5114 DEA 117 230 6.7 86
Show 19499+4937 KOI 365 AB 316 7.0 87
Show 19455+5046 WFC 225 214 55.0 90
Show 19511+4927 KOI 540 320 3.2 91
Show 19539+4918 ACA 2 299 23.0 92
Show 19459+5017 KOI7496 12 3.0 93
Show 19478+5154 AG 239 238 16.2 93
Show 19456+5121 KOI 439 AB 15 5.4 94
Show 19455+5119 KOI 790 97 2.7 95

 
 
WDS 19549+5049 : COMPONENTS
 
 
  A
B pa=17.8°
sep=0.18"
 
 
19549+5049 A
 
 
Componente originario normalizzato AB Name HD 188871 Coord arcsec 2000 195456.19+504911.9 Mag 8.54
Spectral class A0 (white) PmRA 5.00 PmDE 25.0 SAO 32104
HIP 97997 Tycho2 3570-00245-1 HD 188871 BD BD+50 2920
Tycho2
Tycho2 3570-00245-1 Pflag RAmdeg 298.73416178 DEmdeg 50.81997872
PmRA 6.4 PmDE 5.3 E RAmdeg 5 E DEmdeg 5
E pmRA 1.3 E pmDE 1.4 EpRAm 1991.28 EpDEm 1991.39
Num 9 Q RAmdeg 1.2 Q DEmdeg 1.4 Q pmRA 1.2
Q pmDE 1.5 BTmag 7.849 E BTmag 0.015 VTmag 7.797
E VTmag 0.011 Prox 999 TYC T HIP 97997
CCDM AB RAdeg 298.73413833 DEdeg 50.81996694 EpRA 1990 1.63
EpDE 1990 1.69 E RAdeg 4.5 E DEdeg 4.5 Posflg P
Corr 0.0
SAO
SAO 32104 DelFlag RA1950 PmRA1950 0.0004
DE1950 PmDE1950 0.028 Vmag 7.7 SpType A0
Double code Source 37 CatNum 6264 DM BD+50 2920
DMcomp BDsup HD 188871 M HD 0
GC RA1950rad 5.20793319 DE1950rad 0.88465266 PmRA2000 0.0008
PmDE2000 0.027
Hipparcos
Catalog H HIP 97997 Proxy H RAhms 19 54 56.19
DEdms +50 49 11.9 Vmag 7.81 VarFlag R Vmag H
RAdeg 298.734 DEdeg 50.82 AstroRef * Plx 3.87
CCDM 19549+5049 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 5 Rho 0.145 HD 188871 BD BD+50 2920
CD CP Dm number +50 2920 VIred 0.05
SpType A0 R SpType Coord arcsec 2000 195456.19+504911.9
Hipparcos 2
HIP 97997 Sn 55 So 3 Nc 2
RArad 5.2138942875 DErad 0.8869757265 Plx 3.9 PmRA 6.1
PmDE 7.55 E RArad 0.54 E DErad 0.59 E Plx 0.62
E pmRA 0.57 E pmDE 0.64 Hpmag 7.8309 E Hpmag 0.0013
SHp 0.012 VA 0 BV 0.041 E BV 0.01
VI 0.06
CCDM
Ccdm 19549+5049 RComp Comp A Note1
Note2 Discov num DRAs 2.25 DDEs 11.8
R dRAs 10 Year Theta Rho
Obs 2 Vmag 8.6 Sp A0 PmNote *
PmRA 14 PmDE 8 Dm number +50 2920 Cat1 BD
Name2 +50 1439 Cat2 AGK2/3 HD 188871 M HD
ADS BDS A13135 M ADS BDS N IDS IDS 19522N5033A
HIC 97997
 
 
19549+5049 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 195456.20+504912.1 Mag 8.63 Calc delta mag 0.09
Calc coord yes
CCDM
Ccdm 19549+5049 RComp Comp B Note1 *
Note2 Discov num HU 687 DRAs DDEs
R dRAs Year 1904 Theta Rho
Obs 15 Vmag 8.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13135 M ADS BDS N IDS IDS 19522N5033B
HIC 97997