20099+2055 STF2637AC

 
 
20h 09m 56.61s +20 54' 53.2" P.A. 222.00 sep 91.3 mag 6.56,7.52 Sp F3V+F5IV dist. 45.25 pc (147.61 l.y.)
 
 
Coord 2000
20099+2055
Discov num
STF2637
Comp
AC
Coord arcsec 2000
20 09 56.61 +20 54 53.2
Date first
1800
Date last
2017
Obs
96
Pa first
226
Pa last
222
P.A. Now (θ)
222°
Sep first
64.5
Sep last
91.3
Sep. Now (ρ)
91.3"
Mag pri
6.56
Mag sec
7.52
delta mag (ΔM)
0.96
Spectral class
F3V+F5IV (yellow-white/yellow-white)
Pri motion ra
+059
Sec motion ra
+005
Pri motion dec
+098
Sec motion dec
-005
Notes
N L U (See Notes, Linear solution, Proper motion indicates non-physical)
Visually invisible, K-band or other infrared star rPM=1.017
This double is not physical.
 
 
20099+2055 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show The Sge 88276 20099+2055 STF2637 AB 1800 2019 141 331 11.7 6.56 8.85 2.29
Show 88276 20099+2055 STF2637 AC 1800 2017 96 222 91.3 6.56 7.52 0.96 <===
Show 88276 20099+2055 STF2637 AD 1887 2016 10 226 172.8 6.56 11.94 5.38
Show 88276 20099+2055 STF2637 BC 1800 2017 60 215 95.7 8.85 7.52 1.33
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
221.9
Precise sep
91.25
Constellation
Sagitta
SAO
88276
HIP
99352
Tycho2
1630-00481-1
Gaia DR2
48393010560
HD
191570
HR
7705
GC
27987
BD
BD+20 4453
Bayer
Theta Sagittae
Bayer name
The Sge
Flamsteed
17 Sagittae
Flamsteed name
17 Sge
Distance
45.25
Distance ly
147.61
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20099+2055 STF2637 AC 2006 81 222 90.1 6.56 7.52 F3V NLD 200956.61+205453.2
20099+2055 STF2637 AC 2008 82 221 90.0 6.56 7.52 F3V NLD 200956.61+205453.2
20099+2055 STF2637 AC 2009 83 222 89.9 6.56 7.52 F3V NLD 200956.61+205453.2
20099+2055 STF2637 AC 2013 86 222 90.0 6.56 7.52 F3V+F5IV NLD 200956.61+205453.2
20099+2055 STF2637 AC 2015 90 222 91.2 6.56 7.52 F3V+F5IV NL U 200956.61+205453.2
20099+2055 STF2637 AC 2016 91 222 91.5 6.56 7.52 F3V+F5IV NL U 200956.61+205453.2
20099+2055 STF2637 AC 2017 93 222 91.3 6.56 7.52 F3V+F5IV NL U 200956.61+205453.2

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