18128-1618 HJ 2821AB

 
 
18h 12m 48.48s -16 17' 44.9" P.A. 279 sep 7.8 mag 9.71,10.10 Sp B6II/III
 
 
Coord 2000
18128-1618
Discov num
HJ 2821
Comp
AB
Coord arcsec 2000
18 12 48.48 -16 17 44.9
Date first
1830
Date last
2017
Obs
10
Pa first
274
Pa last
279
P.A. Now (θ)
279°
Sep first
4.0
Sep last
7.8
Sep. Now (ρ)
7.8"
Mag pri
9.71
Mag sec
10.10
delta mag (ΔM)
0.39
Spectral class
B6II/III (blue-white)
Pri motion ra
+003
Sec motion ra
-002
Pri motion dec
-005
Sec motion dec
+002
Notes
N (See Notes)
rPM=1.475
This double is not physical.
 
 
18128-1618 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 161188 18128-1618 HJ 2821 AB 1830 2017 10 279 7.8 9.71 10.10 0.39 <===
Show 161188 18128-1618 BU 1463 AC 1898 2007 11 12 53.1 9.71 9.80 0.09
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
278.6
Precise sep
7.83
Cdsa2 id
HJ 2821 AB
Constellation
Sagittarius
SAO
161188
Tycho2
6264-01792-1
HD
166763
Ra deg
18.213466666666665
De deg
-16.295805555555557
last precise pa
278.6
last precise sep
7.83
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18128-1618 HJ 2821 AB 2007 6 278 7.8 9.71 10.10 N 181248.48-161744.9
18128-1618 HJ 2821 AB 2008 7 278 7.9 9.71 10.10 N 181248.48-161744.9
18128-1618 HJ 2821 AB 2017 10 279 7.8 9.71 10.10 B6II/III N 181248.48-161744.9

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