18176-3646 BU  760AC

 
 
18H 17M 37.73S -36 45' 40.6" P.A. 320 SEP 28.3 MAG 3.30,13.10 SP M3.5III DIST. 44.74 PC (145.94 L.Y.)
 
 
Coord 2000
18176-3646
Discov num
BU  760
Comp
AC
Coord arcsec 2000
18 17 37.73 -36 45 40.6
Date first
1896
Date last
2008
Obs
4
Pa first
276
Pa last
320
P.A. Now (θ)
320°
Sep first
33.3
Sep last
28.3
Sep. Now (ρ)
28.3"
Mag pri
3.30
Mag sec
13.10
delta mag (ΔM)
9.8
Spectral class
M3.5III (red)
Pri motion ra
-128
Sec motion ra
Pri motion dec
-167
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
18176-3646 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Eta Sgr 209957 18176-3646 BU 760 AB 1879 2016 27 110 3.5 3.30 8.00 4.70
Show 209957 18176-3646 BU 760 AC 1896 2008 4 320 28.3 3.30 13.10 9.80 <===
Show 209957 18176-3646 BU 760 AD 1879 2010 15 318 93.8 3.30 10.04 6.74
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Sagittarius
SAO
209957
HIP
89642
Tycho2
7404-07057-1
HD
167618
HR
6832
GC
24944
CD
CD-3612423
CP
CP-36 8128
Bayer
Eta Sagittarii
Bayer name
Eta Sgr
Distance
44.74
Distance ly
145.94
last precise pa
319.8
last precise sep
28.28