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Doubles in session


Current system
18439-1954
STN 44
HD 172987


Nearby doubles
3' : 18441-1954
ARA1160

20' : 18436-2013
DON 920

24' : 18425-1943
ARA 761

40' : 18429-1917
OCC9184

40' : 18465-1940
BRT1543

45' : 18407-1957
ARA1158

47' : 18412-1928
OCC9183

50' : 18453-2039
EVS 37AB

52' : 18406-2016
ARA1157

55' : 18418-1909
J 2221AB

59' : 18431-2051
ARA1159

61' : 18470-1912
HJ 2837

62' : 18462-2046
I 1030

63' : 18406-2034
OCC1080

64' : 18483-1935
B 2461

65' : 18479-1936
J 1657

68' : 18405-2040
OCC1079

74' : 18483-2033
DON 924

76' : 18391-2025
ARA1155

78' : 18388-1928
BRT1541

80' : 18393-2038
ARA1156

80' : 18386-2020
DON 917

82' : 18416-2108
KPP 422

83' : 18398-2052
OCC1078

85' : 18452-2117
ARA1553

85' : 18497-2019
SEE 362



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.
 
 
WDS 18439-1954 : COMPONENTS
 
 
  A
B pa=317.3°
sep=1.56"
 
 
18439-1954 A
 
 
Componente originario normalizzato AB Name HD 172987 Coord arcsec 2000 184356.52-195329.9 Mag 9.05
Spectral class K0V (yellow-orange) PmRA 63.00 PmDE -16.0 SAO 161773
Tycho2 6288-00925-2 HD 172987 DM BD-20 5244
Tycho2
Tycho2 6288-00925-2 Pflag P RAmdeg 280.98549109 DEmdeg -19.89165106
PmRA 62.5 PmDE -16.2 E RAmdeg 11 E DEmdeg 18
E pmRA 2.3 E pmDE 2.3 EpRAm 1991.48 EpDEm 1990.72
Num 6 Q RAmdeg 1.3 Q DEmdeg 2.6 Q pmRA 1.3
Q pmDE 2.7 BTmag 10.007 E BTmag 0.029 VTmag 9.049
E VTmag 0.020 Prox 17 TYC T HIP
CCDM RAdeg 280.98551889 DEdeg -19.89174889 EpRA 1990 1.88
EpDE 1990 1.78 E RAdeg 10.6 E DEdeg 17.5 Posflg D
Corr -0.3
SAO
SAO 161773 DelFlag RA1950 PmRA1950 0.0045
DE1950 PmDE1950 -0.012 Vmag 8.5 SpType G5
Double code Source 23 CatNum 7863 DM BD-20 5244
DMcomp BDsup HD 172987 M HD 0
GC RA1950rad 4.89119203 DE1950rad -0.34806694 PmRA2000 0.0046
PmDE2000 -0.011
 
 
18439-1954 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 184356.44-195328.8 Mag 9.13 PmRA 63.00
PmDE -16.0 Tycho2 6288-00925-1 Calc delta mag 0.08 Calc coord yes
Tycho2
Tycho2 6288-00925-1 Pflag P RAmdeg 280.98549109 DEmdeg -19.89165106
PmRA 62.5 PmDE -16.2 E RAmdeg 11 E DEmdeg 18
E pmRA 2.3 E pmDE 2.3 EpRAm 1991.48 EpDEm 1990.72
Num 6 Q RAmdeg 1.3 Q DEmdeg 2.6 Q pmRA 1.3
Q pmDE 2.7 BTmag 10.132 E BTmag 0.033 VTmag 9.129
E VTmag 0.021 Prox 17 TYC T HIP
CCDM RAdeg 280.98512306 DEdeg -19.89145000 EpRA 1990 1.88
EpDE 1990 1.79 E RAdeg 11.7 E DEdeg 19.6 Posflg D
Corr -0.3