18508-2210 BU 1300 (30 Sgr)

 
 
18h 50m 50.50s -22 09' 43.6" P.A. 251 sep 18.6 mag 6.61,13.00 Sp A7III
 
 
Coord 2000
18508-2210
Discov num
BU 1300
Comp
Coord arcsec 2000
18 50 50.50 -22 09 43.6
Date first
1901
Date last
1999
Obs
4
Pa first
247
Pa last
251
P.A. Now (θ)
251°
Sep first
21.5
Sep last
18.6
Sep. Now (ρ)
18.6"
Mag pri
6.61
Mag sec
13.00
delta mag (ΔM)
6.39
Spectral class
A7III (white)
Pri motion ra
-018
Sec motion ra
+058
Pri motion dec
-035
Sec motion dec
-108
Notes
N (See Notes)
rPM=0.86
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
251
Precise sep
18.554
Name
30 Sgr
Constellation
Sagittarius
SAO
187342
HD
174309
HR
7088
Flamsteed
30 Sagittarii
Flamsteed name
30 Sgr
last precise pa
251
last precise sep
18.554
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18508-2210 BU 1300 1998 3 252 18.4 6.61 13.00 A7III N D 185050.50-220943.6
18508-2210 BU 1300 1999 4 251 18.6 6.61 13.00 A7III N D 185050.50-220943.6

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