08554+7048 STF1280AB

 
 
08H 55M 24.82S +70 47' 39.2" P.A. 357.1 SEP 3.21 MAG 8.81,9.10 SP M1+M1
 
 
Coord 2000
08554+7048
Discov num
STF1280
Comp
AB
Coord arcsec 2000
08 55 24.82 +70 47 39.2
Date first
1823
Date last
2015
Obs
250
Pa first
31
Pa last
356
P.A. Now (θ)
357.1°
Sep first
8.8
Sep last
3.0
Sep. Now (ρ)
3.21"
Mag pri
8.81
Mag sec
9.10
delta mag (ΔM)
0.29
Spectral class
M1+M1 (red/red)
Pri motion ra
-133
Sec motion ra
-136
Pri motion dec
-036
Sec motion dec
-041
Notes
N O P (See Notes, Orbital solution, 100-year proper motion)
rPM=0.041 (< 0.3, Physical double)
This double is physical.
 
 
08554+7048 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 6683 08554+7048 STF1280 AB 1823 2015 250 357 3.2 8.81 9.10 0.29 Y <===
Show 6683 08554+7048 STF1280 AC 1984 2000 3 89 377.9 8.81 11.02 2.21
Show 6683 08554+7048 STF1280 BC 1879 1921 3 93 274.1 9.10 11.02 1.92
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ursa Major
SAO
6683
HIP
43820
Tycho2
4378-02162-1
HD
75632
ADS
7067
last precise pa
355.5
last precise sep
3.04
 
 
ORBITAL ELEMENTS
 
 
Period (P)609y Periastron (T)1994.5y Semi-major axis (a)6.58a
Eccentricity (e)0.89 Inclination (i)60° Longitude of periastron (ω)221.5°
Node (Ω)1.2° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.857 324.8
2001 1.031 331.4
2002 1.203 336.1
2003 1.370 339.7
2004 1.532 342.4
2005 1.687 344.7
2006 1.838 346.6
2007 1.982 348.2
2008 2.123 349.6
2009 2.258 350.8
2010 2.389 351.9
2011 2.516 352.8
2012 2.640 353.7
2013 2.760 354.5
2014 2.877 355.2
2015 2.990 355.9
2016 3.101 356.5
2017 3.209 357.1
2018 3.315 357.7
2019 3.418 358.2
2020 3.519 358.7
2021 3.617 359.1
2022 3.714 359.6
2023 3.808 360.0
2024 3.901 0.4
2025 3.992 0.8
2026 4.081 1.1
2027 4.168 1.5
2028 4.254 1.8
2029 4.338 2.1
2030 4.421 2.4

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