11279+0251 STFA 19AB (Tau Leo)

 
 
11h 27m 56.23s +02 51' 22.5" P.A. 182 sep 88.4 mag 5.05,7.47 Sp G8II-III dist. 172.41 pc (562.4 l.y.)
 
 
Coord 2000
11279+0251
Discov num
STFA 19
Comp
AB
Coord arcsec 2000
11 27 56.23 +02 51 22.5
Date first
1780
Date last
2016
Obs
69
Pa first
164
Pa last
182
P.A. Now (θ)
182°
Sep first
82.7
Sep last
88.4
Sep. Now (ρ)
88.4"
Mag pri
5.05
Mag sec
7.47
delta mag (ΔM)
2.42
Spectral class
G8II-III (yellow)
Pri motion ra
+016
Sec motion ra
-090
Pri motion dec
-010
Sec motion dec
+017
Notes
N L (See Notes, Linear solution)
rPM=1.194
This double is not physical.
 
 
11279+0251 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Tau Leo 118875 11279+0251 STFA 19 AB 1780 2016 69 182 88.4 5.05 7.47 2.42 <===
Show 118875 11279+0251 STFA 19 AD 1875 2015 6 92 758.7 5.05 9.51 4.46
Show 11279+0251 STFA 19 BC 1910 2012 4 231 103.5 7.47 14.48 7.01
Show 11279+0251 STFA 19 BD 1875 2015 5 86 763.1 7.47 9.51 2.04
Show 11279+0251 BUP9002 CE 1983 2009 10 193 9.1 14.48 14.22 0.26
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
181.6
Precise sep
88.411
Name
Tau Leo
Constellation
Leo
SAO
118875
HIP
55945
Tycho2
0267-01193-1
HD
99648
HR
4418
GC
15729
BD
BD+03 2504
Bayer
Tau Leonis
Bayer name
Tau Leo
Flamsteed
84 Leonis
Flamsteed name
84 Leo
Distance
172.41
Distance ly
562.4
last precise pa
181.6
last precise sep
88.411
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
11279+0251 STFA 19 AB 2004 51 181 88.9 5.05 7.47 G8II-III NLD 112756.23+025122.5
11279+0251 STFA 19 AB 2010 56 183 88.0 5.05 7.47 G8II-III NLD 112756.23+025122.5
11279+0251 STFA 19 AB 2012 60 181 89.4 5.05 7.47 G8II-III NLD 112756.23+025122.5
11279+0251 STFA 19 AB 2014 63 182 88.5 5.05 7.47 G8II-III NLD 112756.23+025122.5
11279+0251 STFA 19 AB 2015 65 182 88.1 5.05 7.47 G8II-III NLD 112756.23+025122.5
11279+0251 STFA 19 AB 2016 69 182 88.4 5.05 7.47 G8II-III NL 112756.23+025122.5

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