11499+3754 COU 1129 AB (HD 102804)

 
 
11h 49m 52.11s +37° 54' 19.0" P.A. 122.00 sep 0.5 mag 10.58,10.79 Sp G8V dist. 114.16 pc (372.39 l.y.)
 
 
Coord 2000 11499+3754 Discov num COU1129 Comp AB Coord arcsec 2000 11 49 52.11 +37 54 19.0
Date first 1974 Date last 2014 Obs 19
Pa first 157 Pa last 121.8 P.A. Now (θ) 121.8°
Sep first 0.5 Sep last 0.549 Sep. Now (ρ) 0.549"
Mag pri 10.58 Mag sec 10.79 delta mag (ΔM) 0.21 Spectral class G8V (yellow)
Pri motion ra -062 Sec motion ra -062
Pri motion dec -060 Sec motion dec -060
Notes O (Orbital solution)
This double is physical.
 
 
11499+3754 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 102804 11 49 52 +37 54 19 COU 1129 AB 2014 19 122 0.5 10.58 10.79 0.21 Y <===
Show 11 49 52 +37 54 19 UR 6 AB,C 2015 8 270 54.6 9.90 18.70 8.80
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 102804 Constellation Ursa Major HIP 57698 Tycho2 3014-00144-1
Gaia DR2 4032888533332585984 HD 102804 BD BD+38 2283 CP CP-55 4665
Distance 114.16 Distance ly 372.39
 
 
ORBITAL ELEMENTS
 
 
Period (P)450.7y± 111.9 Periastron (T)1973.5y± 7.8 Semi-major axis (a)0.822a± 0.129
Eccentricity (e)0.332± 0.091 Inclination (i)124.4°± 1.6 Longitude of periastron (ω)338°± 10
Node (Ω)146.9°± 1.9 Notes ReferenceBAE2021
Equinox Last observation Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 134.8 0.562
2001 133.9 0.561
2002 133.0 0.560
2003 132.1 0.559
2004 131.2 0.557
2005 130.2 0.556
2006 129.3 0.554
2007 128.4 0.552
2008 127.4 0.550
2009 126.5 0.548
2010 125.5 0.546
2011 124.5 0.544
2012 123.6 0.541
2013 122.6 0.539
2014 121.6 0.537
2015 120.6 0.534
2016 119.6 0.531
2017 118.6 0.529
2018 117.5 0.526
2019 116.5 0.523
2020 115.4 0.520
2021 114.3 0.518
2022 113.3 0.515
2023 112.2 0.512
2024 111.1 0.509
2025 110.0 0.506
2026 108.8 0.504
2027 107.7 0.501
2028 106.5 0.498
2029 105.4 0.495
2030 104.2 0.493


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



 
 


wds11499%2B3754a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic