20312+1116 STF2690A,BC

 
 
20h 31m 11.94s +11 15' 33.7" P.A. 256 sep 17.7 mag 7.12,7.39 Sp B8V dist. 59.99 pc (195.69 l.y.)
 
 
Coord 2000
20312+1116
Discov num
STF2690
Comp
A,BC
Coord arcsec 2000
20 31 11.94 +11 15 33.7
Date first
1777
Date last
2018
Obs
158
Pa first
281
Pa last
256
P.A. Now (θ)
256°
Sep first
15.0
Sep last
17.7
Sep. Now (ρ)
17.7"
Mag pri
7.12
Mag sec
7.39
delta mag (ΔM)
0.27
Spectral class
B8V (blue-white)
Pri motion ra
-004
Sec motion ra
-006
Pri motion dec
-003
Sec motion dec
-010
Notes
N (See Notes)
rPM=0.624
Nature of this double is uncertain.
 
 
20312+1116 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 106196 20312+1116 CHR 99 Aa,Ab 1983 2005 13 137 0.4 7.10
Show 20312+1116 STF2690 A,BC 1777 2018 158 256 17.7 7.12 7.39 0.27 <===
Show 20312+1116 HJ 269 AD 1825 2016 17 108 23.0 7.12 12.10 4.98
Show 20312+1116 DA 1 BC 1840 2006 97 189 0.4 7.90 8.00 0.10 Y
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
255.6
Precise sep
17.699
Constellation
Delphinus
SAO
106195
HIP
101233
Tycho2
1095-01695-1
Gaia DR2
88501616128
HD
195482
Distance
59.99
Distance ly
195.69
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20312+1116 STF2690 A,BC 2006 144 255 17.4 7.12 7.39 B8V D 203111.94+111533.7
20312+1116 STF2690 A,BC 2008 145 255 17.7 7.12 7.39 B8V D 203111.94+111533.7
20312+1116 STF2690 A,BC 2009 149 255 17.3 7.12 7.39 B8V N D 203111.94+111533.7
20312+1116 STF2690 A,BC 2011 150 256 17.7 7.12 7.39 B8V N D 203111.94+111533.7
20312+1116 STF2690 A,BC 2013 155 255 17.6 7.12 7.39 B8V N D 203111.94+111533.7
20312+1116 STF2690 A,BC 2017 157 256 17.7 7.12 7.39 B8V N 203111.94+111533.7
20312+1116 STF2690 A,BC 2018 158 256 17.7 7.12 7.39 B8V N 203111.94+111533.7

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