18138-2104 H 5   7AB (Mu Sgr)

 
 
18h 13m 45.81s -21 03' 31.8" P.A. 258 sep 16.9 mag 3.85,10.48 Sp B8Iape dist. 11111.11 pc (36244.44 l.y.)
 
 
Coord 2000
18138-2104
Discov num
H 5   7
Comp
AB
Coord arcsec 2000
18 13 45.81 -21 03 31.8
Date first
1830
Date last
2013
Obs
20
Pa first
263
Pa last
258
P.A. Now (θ)
258°
Sep first
12.0
Sep last
16.9
Sep. Now (ρ)
16.9"
Mag pri
3.85
Mag sec
10.48
delta mag (ΔM)
6.63
Spectral class
B8Iape (blue-white)
Pri motion ra
+000
Sec motion ra
Pri motion dec
-001
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
18138-2104 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Mu Sgr 186497 18138-2104 H 5 7 AB 1830 2013 20 258 16.9 3.85 10.48 6.63 <===
Show 18138-2104 BU 292 AC 1878 2008 10 119 25.5 3.85 12.80 8.95
Show 18138-2104 HJ 2822 AD 1830 2013 25 312 48.2 3.85 9.96 6.11
Show 18138-2104 HJ 2822 AE 1830 2013 20 114 50.2 3.85 9.22 5.37
Show 18138-2104 SLV 7 BD 1830 1998 12 331 40.9 10.48 9.96 0.52
Show 18138-2104 SLV 7 BE 1879 2015 11 106 64.6 10.48 9.22 1.26
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
257.8
Precise sep
16.87
Name
Mu Sgr
Constellation
Sagittarius
SAO
186497
HIP
89341
Gaia DR2
87667449984
HD
166937
HR
6812
GC
24856
BD
BD-21 4908
Bayer
Mu Sagittarii
Bayer name
Mu Sgr
Flamsteed
13 Sagittarii
Flamsteed name
13 Sgr
Distance
11111.11
Distance ly
36244.44
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18138-2104 H 5 7 AB 2007 18 258 17.0 3.85 10.48 B8Iape N D 181345.81-210331.8
18138-2104 H 5 7 AB 2008 19 259 16.8 3.85 10.48 B8Iape N D 181345.81-210331.8
18138-2104 H 5 7 AB 2013 20 258 16.9 3.85 10.48 B8Iape N 181345.81-210331.8

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