11191+3811 CHR 133AB (55 UMa)

 
 
11H 19M 07.94S +38 11' 08.6" P.A. 102.9 SEP 0.07 MAG 4.78,5.30 SP A2V DIST. 58.82 PC (191.87 L.Y.)
 
 
Coord 2000
11191+3811
Discov num
CHR 133
Comp
AB
Coord arcsec 2000
11 19 07.94 +38 11 08.6
Date first
1987
Date last
2007
Obs
16
Pa first
145
Pa last
127
P.A. Now (θ)
102.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.07"
Mag pri
4.78
Mag sec
5.30
delta mag (ΔM)
0.52
Spectral class
A2V (white)
Pri motion ra
-057
Sec motion ra
Pri motion dec
-068
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
11191+3811 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 55 UMa 62491 11191+3811 CHR 133 AB 1987 2007 16 103 0.1 4.78 5.30 0.52 Y <===
Show 62491 11191+3811 DRS 47 AC 2010 2010 1 145 0.9 4.50 10.10 5.60
Show 62491 11191+3811 DRS 47 AD 1991 2002 4 128 499.7 4.77 7.25 2.48
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
55 UMa
Constellation
Ursa Major
SAO
62491
HIP
55266
HD
98353
HR
4380
GC
15558
BD
BD+38 2225
Flamsteed
55 Ursae Majoris
Flamsteed name
55 UMa
Distance
58.82
Distance ly
191.87
last precise pa
126.6
last precise sep
0.083
 
 
ORBITAL ELEMENTS
 
 
Period (P)1872.7d (5.13y)± 7.4 Periastron (T)48805d (1992.499y)± 18 Semi-major axis (a)0.0913a± 0.0009
Eccentricity (e)0.126± 0.008 Inclination (i)64.8°± 0.8 Longitude of periastron (ω)43.9°± 3.7
Node (Ω)130°± 0.8 Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000-01-01 0.089 325.7
2001-01-01 0.042 39.3
2002-01-01 0.081 120.4
2003-01-01 0.045 174.1
2004-01-01 0.079 293.9
2005-01-01 0.093 321.9
2006-01-01 0.044 22.1
2007-01-01 0.077 115.3
2008-01-01 0.054 161.1
2009-01-01 0.071 288.3
2010-01-01 0.097 318.5
2011-01-01 0.049 7.5
2012-01-01 0.071 109.6
2013-01-01 0.063 151.8
2014-01-01 0.062 281.2
2015-01-01 0.099 315.2
2016-01-01 0.056 356.0
2017-01-01 0.065 102.9
2018-01-01 0.070 144.7
2019-01-01 0.052 271.5
2020-01-01 0.099 312.0
2021-01-01 0.063 347.0
2022-01-01 0.058 94.6
2023-01-01 0.077 138.9
2024-01-01 0.043 257.6
2025-01-01 0.098 308.8
2026-01-01 0.070 339.9
2027-01-01 0.052 84.1
2028-01-01 0.081 133.8
2029-01-01 0.037 237.7
2030-01-01 0.096 305.4

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