08554+7048 STF1280AB

 
 
08h 55m 24.82s +70 47' 39.2" P.A. 358.30 sep 3.7 mag 8.81,9.10 Sp M1V+M1V
 
 
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
2020
Obs
258
Pa first
31
Pa last
359
P.A. Now (θ)
358.3°
Sep first
8.8
Sep last
3.5
Sep. Now (ρ)
3.68"
Mag pri
8.81
Mag sec
9.10
delta mag (ΔM)
0.29
Spectral class
M1V+M1V (red/red)
Pri motion ra
-133
Sec motion ra
-136
Pri motion dec
-036
Sec motion dec
-041
Notes
N O T P (See Notes, Orbital solution, Parallax indicates physical, 100-year proper motion)
rPM=0.041 (< 0.3, Physical double)
This double is physical.
 
 
08554+7048 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 6683 08 55 25 +70 47 39 STF 1280 AB 2020 258 358 3.7 8.81 9.10 0.29 Y <===
Show 6683 08 55 25 +70 47 39 STF 1280 AC 2015 5 88 398.4 8.81 12.40 3.59
Show 6683 08 55 25 +70 47 39 STF 1280 BC 2015 5 88 398.5 9.10 12.40 3.30
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
358.7
Precise sep
3.48
Constellation
Ursa Major
SAO
6683
HIP
43820
Tycho2
4378-02162-1
HD
75632
ADS
7067
last precise pa
358.7
last precise sep
3.48
 
 
ORBITAL ELEMENTS
 
 
Period (P)688.512y± 75.5535 Periastron (T)1994.3455y± 0.0642 Semi-major axis (a)7.18257a± 0.53293
Eccentricity (e)0.89905± 0.00827 Inclination (i)60.483°± 0.378 Longitude of periastron (ω)221.491°± 0.389
Node (Ω)0.372°± 0.261 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation2015
label rho theta
2000 0.890 325.8
2001 1.067 331.9
2002 1.240 336.3
2003 1.409 339.6
2004 1.572 342.3
2005 1.728 344.4
2006 1.880 346.2
2007 2.026 347.7
2008 2.167 349.1
2009 2.304 350.2
2010 2.437 351.3
2011 2.565 352.2
2012 2.690 353.0
2013 2.812 353.8
2014 2.930 354.5
2015 3.046 355.2
2016 3.158 355.8
2017 3.268 356.3
2018 3.375 356.9
2019 3.480 357.3
2020 3.583 357.8
2021 3.683 358.3
2022 3.782 358.7
2023 3.878 359.1
2024 3.973 359.4
2025 4.066 359.8
2026 4.157 0.1
2027 4.246 0.5
2028 4.334 0.8
2029 4.420 1.1
2030 4.505 1.4


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



 
 


wds08554%2B7048b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
08554+7048 STF1280 AB 2007 241 348 2.0 8.81 9.10 M1+M1 NODP 085524.82+704739.2
08554+7048 STF1280 AB 2010 244 352 2.4 8.81 9.10 M1+M1 NODP 085524.82+704739.2
08554+7048 STF1280 AB 2012 247 353 2.6 8.81 9.10 M1 M1 NODP 085524.82+704739.2
08554+7048 STF1280 AB 2015 250 356 3.0 8.81 9.10 M1+M1 NO P 085524.82+704739.2
08554+7048 STF1280 AB 2017 251 357 3.3 8.81 9.10 M1+M1 NO P 085524.82+704739.2
08554+7048 STF1280 AB 2018 254 358 3.4 8.81 9.10 M1V+M1V NO P 085524.82+704739.2
08554+7048 STF1280 AB 2019 257 357 3.4 8.81 9.10 M1V+M1V NO P 085524.82+704739.2

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