11182+3132 STF1523AB (Alula australis)

 
 
11H 18M 10.90S +31 31' 45.0" P.A. 165.9 SEP 1.93 MAG 4.33,4.80 SP F9V+G9V DIST. 10.42 PC (33.99 L.Y.)
 
 
Coord 2000
11182+3132
Discov num
STF1523
Comp
AB
Coord arcsec 2000
11 18 10.90 +31 31 45.0
Date first
1819
Date last
2016
Obs
1621
Pa first
285
Pa last
170
P.A. Now (θ)
165.9°
Sep first
2.6
Sep last
1.9
Sep. Now (ρ)
1.93"
Mag pri
4.33
Mag sec
4.80
delta mag (ΔM)
0.47
Spectral class
F9V+G9V (yellow-white/yellow)
Pri motion ra
-454
Sec motion ra
-454
Pri motion dec
-591
Sec motion dec
-591
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
11182+3132 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Alula australis 62484 11182+3132 STF1523 AB 1819 2016 1621 166 1.9 4.33 4.80 0.47 Y <===
Show 62484 11182+3132 POP1219 AC 1990 2007 4 324 56.4 4.33 15.00 10.67
Show 62484 11182+3132 WTE 1 AD 2010 2012 14 136 511.4 2.14 18.75 16.61
Show 62484 11182+3132 CHR 178 Ba,Bb 1988 1994 2 75 0.0 4.40
Quintuple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
169.7
Precise sep
1.92
Common name
Alula australis
Meaning
first (leap gazelle), South
Constellation
Ursa Major
SAO
62484
HIP
55203
Tycho2
2520-02634-1
HD
98230
HR
4374
GC
15537
ADS
8119
GL
Gl 423A
Bayer
Xi Ursae Majoris
Bayer name
Xi UMa
Flamsteed
53 Ursae Majoris
Flamsteed name
53 UMa
Distance
10.42
Distance ly
33.99
last precise pa
169.7
last precise sep
1.92
 
 
ORBITAL ELEMENTS
 
 
Period (P)59.878y Periastron (T)1935.195y Semi-major axis (a)2.536a
Eccentricity (e)0.398 Inclination (i)122.13° Longitude of periastron (ω)127.94°
Node (Ω)101.85° Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation1994
label rho theta
2000 1.798 274.4
2001 1.828 268.7
2002 1.831 263.1
2003 1.815 257.4
2004 1.784 251.6
2005 1.746 245.5
2006 1.706 239.2
2007 1.668 232.6
2008 1.636 225.6
2009 1.615 218.5
2010 1.606 211.2
2011 1.611 203.9
2012 1.632 196.7
2013 1.666 189.8
2014 1.715 183.2
2015 1.776 177.0
2016 1.846 171.2
2017 1.925 165.9
2018 2.010 161.0
2019 2.099 156.5
2020 2.191 152.4
2021 2.284 148.7
2022 2.376 145.2
2023 2.466 142.0
2024 2.554 139.0
2025 2.638 136.2
2026 2.717 133.6
2027 2.790 131.1
2028 2.858 128.7
2029 2.918 126.4
2030 2.970 124.3

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic