18175-1828 RST3170AB

 
 
18h 17m 28.56s -18 27' 48.4" P.A. 169 sep 8.5 mag 6.54,13.00 Sp O8/9 dist. 628.93 pc (2051.57 l.y.)
 
 
Coord 2000
18175-1828
Discov num
RST3170
Comp
AB
Coord arcsec 2000
18 17 28.56 -18 27 48.4
Date first
1933
Date last
2008
Obs
4
Pa first
170
Pa last
169
P.A. Now (θ)
169°
Sep first
8.4
Sep last
8.5
Sep. Now (ρ)
8.5"
Mag pri
6.54
Mag sec
13.00
delta mag (ΔM)
6.46
Spectral class
O8/9 (blue)
Pri motion ra
+003
Sec motion ra
Pri motion dec
-007
Sec motion dec
Notes
N U (See Notes, Proper motion indicates non-physical)
This double is not physical.
 
 
18175-1828 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 161267 18175-1828 OCC 12 Aa,Ab 1923 1923 0 0.1 7.20 7.20 0.00
Show 161267 18175-1828 RST3170 AB 1933 2008 4 169 8.5 6.54 13.00 6.46 <===
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
168.7
Precise sep
8.548
Cdsa2 id
RST 3170 AB
Constellation
Sagittarius
SAO
161267
HIP
89630
Tycho2
6269-02759-1
HD
167771
HR
6841
BD
BD-18 4886
Ra deg
18.29126666666667
De deg
-18.463444444444445
Distance
628.93
Distance ly
2051.57
last precise pa
168.7
last precise sep
8.548
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18175-1828 RST3170 AB 2008 4 169 8.5 6.54 13.00 O8/9 N D 181728.56-182748.4

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