18257-2102 HLD 144AB

 
 
18H 25M 39.08S -21 02' 17.5" P.A. 42 SEP 2.8 MAG 9.20,9.13 SP A3/5II
 
 
Coord 2000
18257-2102
Discov num
HLD 144
Comp
AB
Coord arcsec 2000
18 25 39.08 -21 02 17.5
Date first
1888
Date last
1991
Obs
14
Pa first
39
Pa last
42
P.A. Now (θ)
42°
Sep first
3.1
Sep last
2.8
Sep. Now (ρ)
2.8"
Mag pri
9.20
Mag sec
9.13
delta mag (ΔM)
0.07
Spectral class
A3/5II (white)
Pri motion ra
+009
Sec motion ra
+009
Pri motion dec
-023
Sec motion dec
-023
Notes
Nature of this double is uncertain.
 
 
18257-2102 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18257-2102 HLD 144 AB 1888 1991 14 42 2.8 9.20 9.13 0.07 <===
Show 18257-2102 HLD 144 AC 1909 1999 3 280 69.0 9.20 12.60 3.40
Show 18257-2102 HLD 144 CD 1909 1999 4 159 7.8 11.50 11.80 0.30
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Sagittarius
Tycho2
6278-01761-2
HD
169475
last precise pa
42.4
last precise sep
2.809