18187-1837 BU 639 AB

 
 
18h 18m 43.26s -18° 37' 10.8" P.A. 136.00 sep 0.5 mag 7.20,8.20 Sp B0Ib
 
 
Coord 2000 18187-1837 Discov num BU  639 Comp AB Coord arcsec 2000 18 18 43.26 -18 37 10.8
Date first 1878 Date last 2017 Obs 32
Pa first 155 Pa last 136 P.A. Now (θ) 136°
Sep first 0.6 Sep last 0.467 Sep. Now (ρ) 0.467"
Mag pri 7.20 Mag sec 8.20 delta mag (ΔM) 1 Spectral class B0Ib (blue-white)
Pri motion ra +004 Sec motion ra
Pri motion dec -004 Sec motion dec
Notes N (See Notes)
Nature of this double is uncertain.
 
 
18187-1837 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 161304 18 18 43 -18 37 11 BU 639 AB 2017 32 136 0.5 7.20 8.20 1.00 <===
Show NSV10543 161304 18 18 43 -18 37 11 SHJ 264 AB,C 2019 59 50 17.2 6.86 7.63 0.77
Show 161304 18 18 43 -18 37 11 FOX 225 AB,E 2000 7 328 145.6 6.86 10.78 3.92
Show 18 18 44 -18 36 60 BU 300 CD 2015 10 329 6.3 7.63 13.10 5.47
Quintuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name NSV10543 Constellation Sagittarius SAO 161304 Tycho2 6269-04010-1
Gaia DR2 4096324302654797952 HD 168021 HR 6848 GC 24978
ADS 11240
 
 
WDS 18187-1837 BU 639 AB : NOTES
 
 
discov_num notes refcode
BU 639 There was a close approach around 1900.
Large divergences in estimated distance due to considerable southern
declination. Vou1951
1994.5191: Quadrant determined by speckle imaging analysis Hor1996
 
 
REFERENCES
 
 
refcode metd author reference
Hor1996 S j Horch, E.P. Dinescu, D.I., Girard, T.M., van Altena, W.F., Lopez, C., & Franz, O. 1996AJ....111.1681H
Hor1996 AJ 111, 1681, 1996 (see also 1997 Inf. Circ. 131, 1 re: HR 4143) 1997IAUDS.131....1H
Vou1951 Ma - Voute, J.G. 1951RA......2..319V
Vou1951 Vatican Obs. Richerche Astron. 2, 319, 1951
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 FOX Fox, P.
190 SHJ South, J. & Herschel, J.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18187-1837 BU 639 AB 1996 30 143 0.4 7.20 8.20 B0Ib N 181843.26-183710.8
18187-1837 BU 639 AB 2008 31 140 0.5 7.20 8.20 B0Ib N 181843.26-183710.8
18187-1837 BU 639 AB 2017 32 137 0.5 7.20 8.20 B0Ib N 181843.26-183710.8

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

 
 
WDS 18187-1837 BU 639 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18187-1837 BU 639 AB : MEASURES
 
 
No records found.

 
 
WDS 18187-1837 : VIRTUAL EYEPIECE
 
 

18187-1837 BU  639A mag 7.2 Sp B0Ib 18187-1837 BU  639B sep 0.5 P.A. 137.50 mag 8.2 18187-1837 BU  300C sep 17.2 P.A. 50.80 mag 7.63 Sp B5 18187-1837 BU  300D sep 19.2 P.A. 32.20 mag 13.1 18187-1837 FOX 225E sep 143.5 P.A. 329.60 mag 10.78 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.

Radius:
Components only
 
 
WDS 18187-1837 : ALADIN DSS IMAGE @ 18h 18m 43.26s -18° 37' 10.8"
 
 
 
 
WDS 18187-1837 BU 639 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


18187-1837  BU  639AB distance=0' 18187-1837  BU  300CD distance=1' 18180-1834  ARA 473 distance=11' 18191-1828  ARA 474 distance=12' 18180-1842  HWE  42 distance=13' 18179-1848  BU  299BR distance=16' 18179-1848  BU  299TS distance=17' 18179-1848  BU  299VW distance=17' 18179-1848  SHJ 263AB distance=17' 18179-1848  BU  299AT distance=17' 18179-1848  BU  299AU distance=17' 18179-1848  BU  299AV distance=17' 18179-1848  BU  299AW distance=17' 18175-1828  OCC  12Aa,Ab distance=21' 18175-1828  RST3170AB distance=21' 18193-1817  BRT1527 distance=22' 18184-1859  OCC9180 distance=23' 18177-1820  ARA 472 distance=24' 18173-1851  ARA 470 distance=26' 18171-1826  ARA 469 distance=27' 18174-1819  ARA 471 distance=27' 18181-1810  NSN 136 distance=29' 18186-1906  OCC9181 distance=30' 18166-1842  ARA 468 distance=31' 18166-1835  DBR 312 distance=31' 18198-1809  RST3175 distance=31' 18188-1804  OL  104 distance=31' 18166-1830  DBR 311 distance=32' 18165-1830  DBR 310 distance=33' 18170-1858  MZA  23AB distance=33' 18170-1858  SNA  85Aa,Ab distance=33' 18170-1858  SNA  85AC distance=33' 18170-1858  SNA  85AD distance=33' 18170-1858  SNA  85AE distance=33' 18168-1858  OCC9179 distance=35' 18165-1856  ARA 466 distance=37' 18206-1811  SKF 100 distance=38' 18164-1858  B  1885 distance=39' 18166-1812  ARA 467 distance=40' 18214-1852  EVS  35AB distance=41' 18214-1852  KRV  48AC distance=41' 18214-1852  KRV  48AD distance=41' 18192-1757  ARA 276 distance=42' 18156-1835  ARA 465 distance=45' 18158-1855  OCC 566 distance=46' 18195-1754  ARA 277 distance=46' 18174-1920  B  2863 distance=47' 18210-1805  DON 893 distance=47' 18179-1750  TDT 781Aa,Ab distance=49' 18179-1750  ARA 275AB distance=49' 18163-1913  B  2440 distance=50' 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 18187-1837 BU 639 AB 136 0.5
Show 18187-1837 SHJ 264 AB,C 50 17.2
Show 18187-1837 FOX 225 AB,E 328 145.6
Show 18187-1837 BU 300 CD 329 6.3 1
Show 18180-1834 ARA 473 334 14.2 11
Show 18191-1828 ARA 474 222 12.6 12
Show 18180-1842 HWE 42 189 21.5 13
Show 18179-1848 BU 299 BR 133 10.2 16
Show 18179-1848 BU 299 TS 304 7.5 17
Show 18179-1848 BU 299 VW 317 6.8 17
Show 18179-1848 SHJ 263 AB 10 53.7 17
Show 18179-1848 BU 299 AT 21 21.5 17
Show 18179-1848 BU 299 AU 66 28.5 17
Show 18179-1848 BU 299 AV 324 22.9 17
Show 18179-1848 BU 299 AW 325 23.4 17
Show 18175-1828 OCC 12 Aa,Ab -1 0.1 21
Show 18175-1828 RST3170 AB 169 8.6 21
Show 18193-1817 BRT1527 359 5.0 22
Show 18184-1859 OCC9180 -1 0.1 23
Show 18177-1820 ARA 472 183 14.8 24
Show 18173-1851 ARA 470 166 13.8 26
Show 18171-1826 ARA 469 355 6.5 27
Show 18174-1819 ARA 471 54 11.8 27
Show 18181-1810 NSN 136 76 32.9 29
Show 18186-1906 OCC9181 -1 0.2 30
Show 18166-1842 ARA 468 131 5.9 31
Show 18166-1835 DBR 312 37 4.4 31
Show 18198-1809 RST3175 127 0.6 31
Show 18188-1804 OL 104 213 3.6 31
Show 18166-1830 DBR 311 101 3.1 32
Show 18165-1830 DBR 310 63 2.1 33
Show 18170-1858 MZA 23 AB 227 17.5 33
Show 18170-1858 SNA 85 Aa,Ab 265 0.0 33
Show 18170-1858 SNA 85 AC 88 5.1 33
Show 18170-1858 SNA 85 AD 247 5.8 33
Show 18170-1858 SNA 85 AE 58 7.3 33
Show 18168-1858 OCC9179 -1 0.1 35
Show 18165-1856 ARA 466 140 7.3 37
Show 18206-1811 SKF 100 140 3.8 38
Show 18164-1858 B 1885 257 2.5 39
Show 18166-1812 ARA 467 81 13.6 40
Show 18214-1852 EVS 35 AB 204 10.6 41
Show 18214-1852 KRV 48 AC 157 71.4 41
Show 18214-1852 KRV 48 AD 98 95.0 41
Show 18192-1757 ARA 276 40 12.6 42
Show 18156-1835 ARA 465 258 15.2 45
Show 18158-1855 OCC 566 -1 0.1 46
Show 18195-1754 ARA 277 117 15.1 46
Show 18174-1920 B 2863 310 5.7 47
Show 18210-1805 DON 893 220 2.8 47
Show 18179-1750 TDT 781 Aa,Ab 130 0.4 49

 
 
WDS 18187-1837 : COMPONENTS
 
 
  A B C D
B pa=137.5°
sep=0.46"
 
C pa=50.8°
sep=17.24"
pa=49.3°
sep=17.22"
 
D pa=32.2°
sep=19.24"
pa=30.9°
sep=19.36"
pa=330.0°
sep=6.21"
 
E pa=329.6°
sep=143.54"
pa=329.5°
sep=143.99"
pa=322.7°
sep=141.94"
pa=322.3°
sep=135.78"
 
 
18187-1837 A
 
 
Coord arcsec 2000 181843.26-183710.8 Mag 7.2 Spectral class B0Ib (blue-white) PmRA 4.00
PmDE -4.0 SAO 161304 Tycho2 6269-04010-1 HD 168021
HR 6848 GC 24978 DM BD-18 4896
Tycho2
Tycho2 6269-04010-1 Pflag RAmdeg 274.68025226 DEmdeg -18.61967101
PmRA 0.6 PmDE -3.8 E RAmdeg 4 E DEmdeg 5
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.43 EpDEm 1991.26
Num 17 Q RAmdeg 1.8 Q DEmdeg 1.8 Q pmRA 1.6
Q pmDE 1.7 BTmag 7.081 E BTmag 0.015 VTmag 6.858
E VTmag 0.011 Prox 173 TYC T HIP
CCDM RAdeg 274.68025056 DEdeg -18.61966194 EpRA 1990 1.86
EpDE 1990 1.87 E RAdeg 3.9 E DEdeg 5.3 Posflg
Corr 0.2
SAO
SAO 161304 DelFlag RA1950 PmRA1950 0.0008
DE1950 PmDE1950 0.005 Vmag 6.4 SpType B0
Double code Source 70 CatNum 24978 DM BD-18 4896
DMcomp BDsup HD 168021 M HD 0
GC 24978 RA1950rad 4.78125942 DE1950rad -0.32533783 PmRA2000 0.0009
PmDE2000 0.006
CCDM
Ccdm 18187-1837 RComp Comp A Note1
Note2 Discov num DRAs 1.34 DDEs -10.1
R dRAs 10 Year Theta Rho
Obs 5 Vmag 6.9 Sp B0 PmNote *
PmRA 14 PmDE 5 Dm number -18 4896 Cat1 BD
Name2 161304 Cat2 SAO HD 168021 M HD
ADS BDS A11240 M ADS BDS N IDS IDS 18128S1840A
HIC
 
 
18187-1837 B
 
 
Coord arcsec 2000 181843.28-183711.1 Mag 8.2 Calc delta mag 1 Calc coord yes
CCDM
Ccdm 18187-1837 RComp Comp B Note1
Note2 Discov num BU 639 DRAs DDEs
R dRAs Year 1958 Theta 135 Rho 0.4
Obs 26 Vmag 7.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11240 M ADS BDS N IDS IDS 18128S1840B
HIC
 
 
18187-1837 C
 
 
Coord arcsec 2000 181844.20-183659.9 Coord calc 181844.20-183659.9 Mag 7.63 Spectral class B5 (blue-white)
PmRA -1.00 PmDE 2.0 Tycho2 6269-04009-1 Calc delta mag 0.43
Tycho2
Tycho2 6269-04009-1 Pflag RAmdeg 274.68418130 DEmdeg -18.61665014
PmRA -1.7 PmDE 0.4 E RAmdeg 5 E DEmdeg 7
E pmRA 2.9 E pmDE 3.1 EpRAm 1991.77 EpDEm 1991.66
Num 3 Q RAmdeg 0.8 Q DEmdeg 1.6 Q pmRA 0.8
Q pmDE 1.6 BTmag 7.832 E BTmag 0.016 VTmag 7.627
E VTmag 0.013 Prox 173 TYC T HIP
CCDM RAdeg 274.68418556 DEdeg -18.61665111 EpRA 1990 1.81
EpDE 1990 1.73 E RAdeg 5.0 E DEdeg 7.1 Posflg
Corr 0.3
CCDM
Ccdm 18187-1837 RComp Comp C Note1
Note2 Discov num SHJ 264 DRAs 2.18 DDEs -0.6
R dRAs 10 Year 1823 Theta 052 Rho 17.2
Obs 15 Vmag 9.4 Sp PmNote *
PmRA -3 PmDE -8 Dm number -18 4897 Cat1 BD
Name2 161306 Cat2 SAO HD M HD
ADS BDS A11240 M ADS BDS N IDS IDS 18128S1840C
HIC
 
 
18187-1837 D
 
 
Coord arcsec 2000 181843.98-183654.5 Mag 13.1 Calc delta mag 5.9 Calc coord yes
CCDM
Ccdm 18187-1837 RComp C Comp D Note1
Note2 Discov num BU 300 DRAs DDEs
R dRAs Year 1934 Theta 325 Rho 7.5
Obs 7 Vmag 14.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11240 M ADS BDS N IDS IDS 18128S1840D
HIC
 
 
18187-1837 E
 
 
Coord arcsec 2000 181838.14-183507.0 Mag 10.78 PmRA -18.00 PmDE -17.0
Tycho2 6269-02839-1 Calc delta mag 3.58 Calc coord yes
Tycho2
Tycho2 6269-02839-1 Pflag RAmdeg 274.65776131 DEmdeg -18.58519197
PmRA -18.3 PmDE -17.4 E RAmdeg 51 E DEmdeg 78
E pmRA 3.0 E pmDE 3.2 EpRAm 1987.69 EpDEm 1982.91
Num 3 Q RAmdeg 1.8 Q DEmdeg 0.6 Q pmRA 1.8
Q pmDE 0.6 BTmag 11.961 E BTmag 0.169 VTmag 10.780
E VTmag 0.096 Prox 999 TYC HIP
CCDM RAdeg 274.65780528 DEdeg -18.58515250 EpRA 1990 1.80
EpDE 1990 1.84 E RAdeg 52.4 E DEdeg 82.6 Posflg
Corr 0.1
CCDM
Ccdm 18187-1837 RComp Comp E Note1
Note2 Discov num FOX DRAs DDEs
R dRAs Year 1918 Theta 330 Rho 146.6
Obs 1 Vmag 11.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11240 M ADS BDS N IDS IDS 18128S1840E
HIC