20302+1925 BU  987AB

20h 30m 14.44s +19 25' 15.7" P.A. 128.00 sep 2.5 mag 6.80,11.10 Sp B7IV dist. 386.1 pc (1259.46 l.y.)

Coord 2000
20302+1925
Discov num
BU  987
Comp
AB
Coord arcsec 2000
20 30 14.44 +19 25 15.7
Date first
1880
Date last
2018
Obs
12
Pa first
128
Pa last
128
P.A. Now (θ)
128°
Sep first
2.3
Sep last
2.5
Sep. Now (ρ)
2.5"
Mag pri
6.80
Mag sec
11.10
delta mag (ΔM)
4.3
Spectral class
B7IV (blue-white)
Pri motion ra
+006
Sec motion ra
Pri motion dec
-006
Sec motion dec
Notes
N (See Notes)


Nature of this double is uncertain.



20302+1925 SYSTEM COMPONENTS

Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 106177 20302+1925 BU 987 AB 1880 2018 12 128 2.5 6.80 11.10 4.30 <===
Show 106177 20302+1925 S 752 AC 1824 2015 31 288 106.3 6.80 7.30 0.50
Show 106177 20302+1925 FOX 254 AE 1913 2013 8 70 21.2 6.80 13.00 6.20
Show 106171 20302+1925 FOX 254 CD 1913 2015 8 301 35.0 7.30 15.30 8.00
Quintuple system
5 visible stars in this system



OTHER CATALOGS AND DESIGNATIONS

Precise pa
127.5
Precise sep
2.52
Constellation
Delphinus
SAO
106177
HIP
101154
Tycho2
1640-01818-1
Gaia DR2
92083365120
HD
195358
BD
BD+18 4517
Distance
386.1
Distance ly
1259.46




WDS HISTORIC DATA

coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20302+1925 BU 987 AB 1986 11 126 2.6 6.80 11.10 B7IV 203014.44+192515.8
20302+1925 BU 987 AB 2018 12 128 2.5 6.80 11.10 B7IV N 203014.44+192515.7

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