11387+4507 STF1561AB

 
 
11H 38M 44.90S +45 06' 30.3" P.A. 245.8 SEP 8.87 MAG 6.53,8.23 SP G0V DIST. 23.25 PC (75.84 L.Y.)
 
 
Coord 2000
11387+4507
Discov num
STF1561
Comp
AB
Coord arcsec 2000
11 38 44.90 +45 06 30.3
Date first
1782
Date last
2015
Obs
146
Pa first
270
Pa last
245
P.A. Now (θ)
245.8°
Sep first
12.5
Sep last
9.2
Sep. Now (ρ)
8.87"
Mag pri
6.53
Mag sec
8.23
delta mag (ΔM)
1.7
Spectral class
G0V (yellow)
Pri motion ra
-594
Sec motion ra
-571
Pri motion dec
+015
Sec motion dec
-001
Notes
N O (See Notes, Orbital solution)
rPM=0.047 (< 0.3, Physical double)
This double is physical.
 
 
11387+4507 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 43841 11387+4507 STF1561 AB 1782 2015 146 246 8.9 6.53 8.23 1.70 Y <===
Show 43841 11387+4507 STF1561 AC 1782 2015 28 90 176.8 6.53 9.46 2.93
Show 43841 11387+4507 STF1561 AD 1991 2009 4 77 710.6 6.53 7.56 1.03
Show 43841 11387+4507 STF1561 AE 1923 2015 12 338 60.7 6.53 12.08 5.55
Show 43841 11387+4507 STF1561 BC 1783 2015 20 89 179.6 8.23 9.46 1.23
Show 43841 11387+4507 STF1561 BE 1923 2015 10 347 61.7 8.23 12.08 3.85
Show 43846 11387+4507 STF1561 CD 1895 2009 5 73 549.9 9.46 7.56 1.90
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ursa Major
SAO
43841
HIP
56809
Tycho2
3452-01883-1
HD
101177
HR
4486
ADS
8250
GL
Gl 433.2A
BD
BD+45 1947
Distance
23.25
Distance ly
75.84
last precise pa
245.3
last precise sep
9.192
 
 
ORBITAL ELEMENTS
 
 
Period (P)2050y Periastron (T)2500y Semi-major axis (a)10.33a
Eccentricity (e)0.05 Inclination (i)125.86° Longitude of periastron (ω)129.58°
Node (Ω)271.24° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1991
label rho theta
2000 9.085 248.2
2001 9.072 248.0
2002 9.060 247.9
2003 9.047 247.8
2004 9.034 247.6
2005 9.021 247.5
2006 9.009 247.3
2007 8.996 247.2
2008 8.983 247.1
2009 8.970 246.9
2010 8.957 246.8
2011 8.944 246.7
2012 8.931 246.5
2013 8.918 246.4
2014 8.905 246.3
2015 8.892 246.1
2016 8.878 246.0
2017 8.865 245.8
2018 8.852 245.7
2019 8.839 245.6
2020 8.826 245.4
2021 8.812 245.3
2022 8.799 245.1
2023 8.786 245.0
2024 8.772 244.8
2025 8.759 244.7
2026 8.745 244.6
2027 8.732 244.4
2028 8.718 244.3
2029 8.705 244.1
2030 8.691 244.0

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