17304+5218 BU 1090AB (Alwaid)

 
 
17h 30m 25.98s +52 18' 04.9" P.A. 12 sep 4.4 mag 2.79,14.00 Sp G2Ib-IIa dist. 116.55 pc (380.19 l.y.)
 
 
Coord 2000
17304+5218
Discov num
BU 1090
Comp
AB
Coord arcsec 2000
17 30 25.98 +52 18 04.9
Date first
1889
Date last
1934
Obs
6
Pa first
13
Pa last
12
P.A. Now (θ)
12°
Sep first
4.0
Sep last
4.4
Sep. Now (ρ)
4.4"
Mag pri
2.79
Mag sec
14.00
delta mag (ΔM)
11.21
Spectral class
G2Ib-IIa (yellow)
Pri motion ra
-016
Sec motion ra
Pri motion dec
+015
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
17304+5218 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Alwaid 30429 17304+5218 BU 1090 AB 1889 1934 6 12 4.4 2.79 14.00 11.21 <===
Show 30429 17304+5218 BU 1090 AC 1912 2012 5 155 118.9 2.79 13.45 10.66
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
12.3
Precise sep
4.42
Common name
Alwaid
Meaning
snake's head
Other names
RASTABAN, ASUIA
Constellation
Draco
SAO
30429
HIP
85670
HD
159181
HR
6536
GC
23741
BD
BD+52 2065
Bayer
Beta Draconis
Bayer name
Bet Dra
Flamsteed
23 Draconis
Flamsteed name
23 Dra
Distance
116.55
Distance ly
380.19
last precise pa
12.3
last precise sep
4.42
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17304+5218 BU 1090 AB 1934 6 12 4.4 2.79 14.00 G2Ib-IIa N D 173025.98+521804.9

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