20170+1716 OSO 123AD

 
 
20h 17m 01.33s +17 15' 45.9" P.A. 99.00 sep 21.1 mag 10.61,13.30 Sp K5
 
 
Coord 2000
20170+1716
Discov num
OSO 123
Comp
AD
Coord arcsec 2000
20 17 01.33 +17 15 45.9
Date first
1994
Date last
2015
Obs
11
Pa first
114
Pa last
99
P.A. Now (θ)
99°
Sep first
18.9
Sep last
21.1
Sep. Now (ρ)
21.1"
Mag pri
10.61
Mag sec
13.30
delta mag (ΔM)
2.69
Spectral class
K5 (yellow-orange)
Pri motion ra
-169
Sec motion ra
-002
Pri motion dec
-208
Sec motion dec
+000
Notes
N (See Notes)
Visually invisible, K-band or other infrared star rPM=0.995
This double is not physical.
 
 
20170+1716 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20170+1716 OSO 123 AB 1994 1994 2 264 10.0 10.61 18.30 7.69
Show 20170+1716 OSO 123 AC 1994 2015 11 349 17.9 10.61 14.20 3.59
Show 20170+1716 OSO 123 AD 1994 2015 11 99 21.1 10.61 13.30 2.69 <===
Show 20170+1716 OSO 123 AE 1994 2014 8 44 26.2 10.61 18.30 7.69
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
98.5
Precise sep
21.135
Constellation
Sagitta
Tycho2
1635-00284-1
Gaia DR2
10169472256
HD
351944
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20170+1716 OSO 123 AD 1998 3 110 19.2 10.61 13.30 N D 201701.33+171545.9
20170+1716 OSO 123 AD 2001 4 108 19.5 10.61 13.30 N D 201701.33+171545.9
20170+1716 OSO 123 AD 2015 11 99 21.1 10.61 13.30 K5 N 201701.33+171545.9

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