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Doubles in session


Current system
18362-1950
ARA 756
HD 171557


Nearby doubles
30' : 18367-2019
HO 567

32' : 18349-1925
ARA 755

37' : 18374-1917
ARA 758

39' : 18340-1929
B 1887

40' : 18371-1913
SEE 355

43' : 18388-1928
BRT1541

44' : 18333-2003
ARA1153

45' : 18386-2020
DON 917

50' : 18372-2039
DON 914

54' : 18391-2025
ARA1155

54' : 18336-2030
DON 911

56' : 18331-1918
J 2215

59' : 18328-2022
KPP 416

64' : 18365-1847
OCC 970

64' : 18393-2038
ARA1156

65' : 18407-1957
ARA1158

68' : 18406-2016
ARA1157

68' : 18393-1859
ARA 760

68' : 18337-2048
ARA1154

69' : 18388-1853
FEN 33

70' : 18325-1906
RST5116

71' : 18319-1915
TDT 930

74' : 18317-1915
ARN 107

75' : 18412-1928
OCC9183

75' : 18325-1858
ARN 52AB

75' : 18321-1906
RST3186



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

18362-1950 ARA 756 (HD 171557)

 
 
18h 36m 14.18s -19° 50' 24.3" P.A. 325.00 sep 9.5 mag 8.89,11.80 Sp B6III
 
 
Coord 2000 18362-1950 Discov num ARA 756 Comp Coord arcsec 2000 18 36 14.18 -19 50 24.3
Date first 1919 Date last 2015 Obs 7
Pa first 322 Pa last 325.4 P.A. Now (θ) 325.4°
Sep first 9.1 Sep last 9.507 Sep. Now (ρ) 9.507"
Mag pri 8.89 Mag sec 11.80 delta mag (ΔM) 2.91 Spectral class B6III (blue-white)
Pri motion ra -001 Sec motion ra -007
Pri motion dec -007 Sec motion dec -004
Notes
rPM=0.832
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 171557 Constellation Sagittarius SAO 161648 Tycho2 6275-00618-1
Gaia DR2 4092384580685830144 HD 171557
 
 
WDS 18362-1950 ARA 756 (HD 171557) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Ara1961 Pa - Aravamudan, S. 1961PASP...73..266A
Ara1961 PASP 73, 266, 1961
Ara1963 Pa - Aravamudan, S. .
Ara1963 Pub. Nizamiah Obs. 13, Pt.3, 1963
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18362-1950 ARA 756 1998 2 325 9.6 8.89 11.80 B6III D 183614.18-195024.3
18362-1950 ARA 756 1999 3 325 9.4 8.89 11.80 B6III D 183614.18-195024.3
18362-1950 ARA 756 2010 4 325 9.4 8.89 11.80 B6III 183614.18-195024.3
18362-1950 ARA 756 2015 5 325 9.5 8.89 11.80 B6III 183614.18-195024.3

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

 
 
WDS 18362-1950 ARA 756 (HD 171557) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18362-1950 ARA 756 (HD 171557) : MEASURES
 
 
No records found.

 
 
WDS 18362-1950 (HD 171557) : VIRTUAL EYEPIECE
 
 

18362-1950 ARA 756A mag 8.89 Sp B6III 18362-1950 ARA 756B sep 9.3 P.A. 327.00 mag 11.8 virtual eyepiece
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Radius:
Components only
 
 
WDS 18362-1950 (HD 171557) : ALADIN DSS IMAGE @ 18h 36m 14.18s -19° 50' 24.3"
 
 
 
 
WDS 18362-1950 ARA 756 (HD 171557) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18362-1950 ARA 756 distance=0' 18367-2019 HO 567 distance=30' 18349-1925 ARA 755 distance=32' 18374-1917 ARA 758 distance=37' 18340-1929 B 1887 distance=39' 18371-1913 SEE 355 distance=40' 18388-1928 BRT1541 distance=43' 18333-2003 ARA1153 distance=44' 18386-2020 DON 917 distance=45' 18372-2039 DON 914 distance=50' 18391-2025 ARA1155 distance=54' 18336-2030 DON 911 distance=54' 18331-1918 J 2215 distance=56' 18328-2022 KPP 416 distance=59' 18365-1847 OCC 970 distance=64' 18393-2038 ARA1156 distance=64' 18407-1957 ARA1158 distance=65' 18406-2016 ARA1157 distance=68' 18393-1859 ARA 760 distance=68' 18337-2048 ARA1154 distance=68' 18388-1853 FEN 33 distance=69' 18325-1906 RST5116 distance=70' 18319-1915 TDT 930 distance=71' 18317-1915 ARN 107 distance=74' 18412-1928 OCC9183 distance=75' 18319-1908 BU 966IC distance=75' 18319-1908 BU 966IB distance=75' 18319-1908 BU 966IQ distance=75' 18325-1858 ARN 52AB distance=75' 18325-1858 ANT 10AC distance=75' 18321-1906 RST3186 distance=75' 18319-1908 BU 966AI distance=75' 18319-1908 BU 966AR distance=75' 18319-1908 BU 966AH distance=75' 18319-1908 BU 966AG distance=75' 18319-1908 BU 966AB distance=75' 18319-1908 BU 966AE distance=75' 18319-1908 EVS 36AU distance=75' 18319-1908 EVS 36AV distance=75' 18319-1908 EVS 36AW distance=75' 18319-1908 KRV 17AN distance=75' 18319-1908 KRV 17AO distance=75' 18325-1858 ANT 10BC distance=76' 18406-2034 OCC1080 distance=76' 18319-1908 BU 966CD distance=76' 18319-1908 BU 966CG distance=76' 18319-1908 BU 966CQ distance=76' 18319-1908 BU 966Ba,Bb distance=76' 18319-1908 BU 966BC distance=76' 18319-1908 BU 966BE distance=76' 18319-1908 BU 966BH distance=76' 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 18362-1950 ARA 756 325 9.5
Show 18367-2019 HO 567 165 1.3 30
Show 18349-1925 ARA 755 77 13.1 32
Show 18374-1917 ARA 758 270 9.1 37
Show 18340-1929 B 1887 283 2.2 39
Show 18371-1913 SEE 355 241 11.1 40
Show 18388-1928 BRT1541 34 4.2 43
Show 18333-2003 ARA1153 295 12.5 44
Show 18386-2020 DON 917 51 1.1 45
Show 18372-2039 DON 914 174 0.4 50
Show 18391-2025 ARA1155 238 11.6 54
Show 18336-2030 DON 911 348 2.1 54
Show 18331-1918 J 2215 267 6.0 56
Show 18328-2022 KPP 416 159 4.9 59
Show 18365-1847 OCC 970 -1 0.1 64
Show 18393-2038 ARA1156 16 15.8 64
Show 18407-1957 ARA1158 68 6.6 65
Show 18406-2016 ARA1157 356 9.5 68
Show 18393-1859 ARA 760 60 5.6 68
Show 18337-2048 ARA1154 288 7.2 68
Show 18388-1853 FEN 33 248 2.6 69
Show 18325-1906 RST5116 67 3.0 70
Show 18319-1915 TDT 930 194 1.2 71
Show 18317-1915 ARN 107 289 21.1 74
Show 18412-1928 OCC9183 -1 0.2 75
Show 18319-1908 BU 966 IC 264 93.6 75
Show 18319-1908 BU 966 IB 351 141.3 75
Show 18319-1908 BU 966 IQ 301 69.5 75
Show 18325-1858 ARN 52 AB 262 70.0 75
Show 18325-1858 ANT 10 AC 256 65.8 75
Show 18321-1906 RST3186 187 0.7 75
Show 18319-1908 BU 966 AI 194 165.0 75
Show 18319-1908 BU 966 AR 90 77.0 75
Show 18319-1908 BU 966 AH 295 72.0 75
Show 18319-1908 BU 966 AG 254 429.6 75
Show 18319-1908 BU 966 AB 252 66.2 75
Show 18319-1908 BU 966 AE 281 144.8 75
Show 18319-1908 EVS 36 AU 127 14.0 75
Show 18319-1908 EVS 36 AV 164 17.3 75
Show 18319-1908 EVS 36 AW 19 19.6 75
Show 18319-1908 KRV 17 AN 178 66.8 75
Show 18319-1908 KRV 17 AO 175 35.4 75
Show 18325-1858 ANT 10 BC 138 8.2 76
Show 18406-2034 OCC1080 -1 0.0 76
Show 18319-1908 BU 966 CD 171 11.0 76
Show 18319-1908 BU 966 CG 280 284.3 76
Show 18319-1908 BU 966 CQ 36 56.5 76
Show 18319-1908 BU 966 Ba,Bb 95 0.9 76
Show 18319-1908 BU 966 BC 205 164.9 76
Show 18319-1908 BU 966 BE 302 91.0 76
Show 18319-1908 BU 966 BH 358 50.8 76

 
 
WDS 18362-1950 : COMPONENTS
 
 
  A
B pa=327.0°
sep=9.33"
 
 
18362-1950 A
 
 
Componente originario normalizzato AB Name HD 171557 Coord arcsec 2000 183614.18-195024.3 Mag 8.89
Spectral class B6III (blue-white) PmRA -1.00 PmDE -7.0 SAO 161648
Tycho2 6275-00618-1 HD 171557 DM BD-19 5083
Tycho2
Tycho2 6275-00618-1 Pflag RAmdeg 279.05908240 DEmdeg -19.84009578
PmRA -3.2 PmDE -7.5 E RAmdeg 10 E DEmdeg 12
E pmRA 1.5 E pmDE 1.4 EpRAm 1990.33 EpDEm 1989.61
Num 7 Q RAmdeg 1.0 Q DEmdeg 0.8 Q pmRA 1.0
Q pmDE 0.8 BTmag 9.159 E BTmag 0.021 VTmag 8.890
E VTmag 0.019 Prox 999 TYC T HIP
CCDM RAdeg 279.05909028 DEdeg -19.84007806 EpRA 1990 1.71
EpDE 1990 1.60 E RAdeg 10.1 E DEdeg 11.7 Posflg
Corr -0.1
SAO
SAO 161648 DelFlag RA1950 PmRA1950 0.0031
DE1950 PmDE1950 -0.014 Vmag 8.7 SpType B9
Double code Source 23 CatNum 7787 DM BD-19 5083
DMcomp BDsup HD 171557 M HD 0
GC RA1950rad 4.85758751 DE1950rad -0.34700772 PmRA2000 0.0032
PmDE2000 -0.013
CCDM
Ccdm 18362-1950 RComp Comp A Note1
Note2 Discov num DRAs 2.41 DDEs -24.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.2 Sp B9 PmNote *
PmRA 44 PmDE -14 Dm number -19 5083 Cat1 BD
Name2 161648 Cat2 SAO HD 171557 M HD
ADS BDS M ADS BDS N IDS IDS 18303S1955A
HIC
 
 
18362-1950 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 183613.82-195016.5 Mag 11.8 PmRA -7.00
PmDE -4.0 Calc delta mag 2.91 Calc coord yes
CCDM
Ccdm 18362-1950 RComp Comp B Note1
Note2 Discov num ARA 756 DRAs DDEs
R dRAs Year 1919 Theta 323 Rho 8.5
Obs 1 Vmag 12.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 18303S1955B
HIC