18254-2033 JC    6 (21 Sgr)

 
 
18h 25m 21.02s -20 32' 29.9" P.A. 280 sep 1.7 mag 5.03,7.43 Sp K1III+A1V dist. 125.79 pc (410.33 l.y.)
 
 
Coord 2000
18254-2033
Discov num
JC    6
Comp
Coord arcsec 2000
18 25 21.02 -20 32 29.9
Date first
1846
Date last
2008
Obs
34
Pa first
297
Pa last
280
P.A. Now (θ)
280°
Sep first
1.8
Sep last
1.7
Sep. Now (ρ)
1.7"
Mag pri
5.03
Mag sec
7.43
delta mag (ΔM)
2.4
Spectral class
K1III+A1V (yellow-orange/white)
Pri motion ra
+020
Sec motion ra
+020
Pri motion dec
-023
Sec motion dec
-023
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
279.6
Precise sep
1.65
Name
21 Sgr
Constellation
Sagittarius
SAO
186794
HIP
90289
Tycho2
6274-01663-1
HD
169420
HR
6896
GC
25132
BD
BD-20 5134
Flamsteed
21 Sagittarii
Flamsteed name
21 Sgr
Distance
125.79
Distance ly
410.33
last precise pa
279.6
last precise sep
1.65
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18254-2033 JC 6 1991 33 284 1.7 5.03 7.43 K1III A1V N D 182521.02-203229.9
18254-2033 JC 6 1997 37 275 1.5 5.03 7.43 K1III+A1V N D 182521.02-203229.9
18254-2033 JC 6 2008 34 280 1.7 5.03 7.43 K1III+A1V N D 182521.02-203229.9

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