08531+5457 A  1584

 
 
08H 53M 08.05S +54 57' 11.0" P.A. 93.7 SEP 0.68 MAG 8.99,7.72 SP G0 DIST. 52.11 PC (169.98 L.Y.)
 
 
Coord 2000
08531+5457
Discov num
A  1584
Comp
Coord arcsec 2000
08 53 08.05 +54 57 11.0
Date first
1907
Date last
2016
Obs
111
Pa first
168
Pa last
90
P.A. Now (θ)
93.7°
Sep first
0.3
Sep last
0.7
Sep. Now (ρ)
0.68"
Mag pri
8.99
Mag sec
7.72
delta mag (ΔM)
1.27
Spectral class
G0 (yellow)
Pri motion ra
+038
Sec motion ra
+038
Pri motion dec
+042
Sec motion dec
+042
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ursa Major
SAO
27027
HIP
43630
Tycho2
3798-01356-1
HD
75553
ADS
7054
BD
BD+55 1297
Distance
52.11
Distance ly
169.98
last precise pa
90.2
last precise sep
0.71
 
 
ORBITAL ELEMENTS
 
 
Period (P)70.89y Periastron (T)1985.01y Semi-major axis (a)0.419a
Eccentricity (e)0.712 Inclination (i)33.2° Longitude of periastron (ω)39.5°
Node (Ω)243.1° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2013
label rho theta
2000 0.536 71.0
2001 0.553 72.8
2002 0.569 74.4
2003 0.583 76.0
2004 0.596 77.5
2005 0.609 79.0
2006 0.619 80.3
2007 0.629 81.7
2008 0.638 83.0
2009 0.646 84.3
2010 0.653 85.5
2011 0.659 86.7
2012 0.664 87.9
2013 0.668 89.1
2014 0.671 90.3
2015 0.674 91.4
2016 0.675 92.6
2017 0.676 93.7
2018 0.676 94.9
2019 0.675 96.0
2020 0.673 97.2
2021 0.671 98.3
2022 0.668 99.5
2023 0.664 100.7
2024 0.659 101.9
2025 0.654 103.1
2026 0.647 104.3
2027 0.640 105.6
2028 0.633 106.9
2029 0.624 108.2
2030 0.615 109.6

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