12115+5325 STF 1608 AB (MZ UMa)

 
 
12h 11m 27.76s +53° 25' 17.5" P.A. 221.00 sep 13.6 mag 8.11,8.27 Sp K0 dist. 35.45 pc (115.64 l.y.)
 
 
Coord 2000 12115+5325 Discov num STF1608 Comp AB Coord arcsec 2000 12 11 27.76 +53 25 17.5
Date first 1823 Date last 2021 Obs 140
Pa first 224 Pa last 220.5 P.A. Now (θ) 220.5°
Sep first 12.1 Sep last 13.603 Sep. Now (ρ) 13.603"
Mag pri 8.11 Mag sec 8.27 delta mag (ΔM) 0.16 Spectral class K0 (yellow-orange)
Pri motion ra -164 Sec motion ra -169
Pri motion dec -123 Sec motion dec -136
Notes N C V (See Notes, Has orbit and linear solution, Proper motion indicates physical)
rPM=0.064 (< 0.3, Physical double)
This double is physical.
 
 
12115+5325 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show MZ UMa 28287 12 11 28 +53 25 18 STF 1608 AB 2021 140 221 13.6 8.11 8.27 0.16 Y <===
Show 28287 12 11 28 +53 25 18 SHY 233 AC 1999 3 117 999.9 8.10 11.27 3.17
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name MZ UMa Constellation Ursa Major SAO 28287 HIP 59431
Tycho2 3834-01089-1 Gaia DR2 1572914025633785728 HD 105963 GC 16648
ADS 8450 GL NN 3712B BD BD+54 1499 Distance 35.45
Distance ly 115.64
 
 
ORBITAL ELEMENTS
 
 
Period (P)2236.0301y± 817.4875 Periastron (T)2434.5743y± 163.3266 Semi-major axis (a)19.66795a± 9.16357
Eccentricity (e)0.6409± 0.27401 Inclination (i)92.932°± 1.869 Longitude of periastron (ω)266.009°± 28.895
Node (Ω)36.653°± 1.36 Notesn ReferenceIzm2019
Equinox Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 220.8 13.317
2001 220.8 13.329
2002 220.8 13.342
2003 220.8 13.354
2004 220.7 13.366
2005 220.7 13.379
2006 220.7 13.391
2007 220.7 13.403
2008 220.7 13.415
2009 220.7 13.427
2010 220.7 13.439
2011 220.6 13.451
2012 220.6 13.463
2013 220.6 13.474
2014 220.6 13.486
2015 220.6 13.498
2016 220.6 13.509
2017 220.6 13.521
2018 220.5 13.532
2019 220.5 13.543
2020 220.5 13.554
2021 220.5 13.566
2022 220.5 13.577
2023 220.5 13.588
2024 220.5 13.599
2025 220.5 13.610
2026 220.4 13.620
2027 220.4 13.631
2028 220.4 13.642
2029 220.4 13.652
2030 220.4 13.663


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



 
 


wds12115%2B5325a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic