11308+4117 STT 234

 
 
11H 30M 49.91S +41 17' 12.7" P.A. 184.4 SEP 0.41 MAG 7.45,8.13 SP F6V DIST. 74.79 PC (243.96 L.Y.)
 
 
Coord 2000
11308+4117
Discov num
STT 234
Comp
Coord arcsec 2000
11 30 49.91 +41 17 12.7
Date first
1843
Date last
2012
Obs
257
Pa first
180
Pa last
175
P.A. Now (θ)
184.4°
Sep first
0.3
Sep last
0.5
Sep. Now (ρ)
0.41"
Mag pri
7.45
Mag sec
8.13
delta mag (ΔM)
0.68
Spectral class
F6V (yellow-white)
Pri motion ra
+092
Sec motion ra
+092
Pri motion dec
-098
Sec motion dec
-098
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ursa Major
SAO
43789
HIP
56165
Tycho2
3015-02226-1
HD
100018
ADS
8189
BD
BD+42 2214
Distance
74.79
Distance ly
243.96
last precise pa
175
last precise sep
0.47
 
 
ORBITAL ELEMENTS
 
 
Period (P)86.86y± 3 Periastron (T)1967.89y± 0.5 Semi-major axis (a)0.381a± 0.015
Eccentricity (e)0.356± 0.015 Inclination (i)56.6°± 1.5 Longitude of periastron (ω)29.8°± 4
Node (Ω)336.4°± 2 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2000
label rho theta
2000 0.490 159.2
2001 0.493 160.5
2002 0.495 161.8
2003 0.496 163.1
2004 0.496 164.3
2005 0.495 165.6
2006 0.493 166.8
2007 0.490 168.1
2008 0.487 169.4
2009 0.483 170.7
2010 0.478 172.1
2011 0.472 173.5
2012 0.466 174.9
2013 0.459 176.3
2014 0.451 177.8
2015 0.442 179.4
2016 0.433 181.0
2017 0.424 182.7
2018 0.414 184.4
2019 0.403 186.3
2020 0.392 188.2
2021 0.381 190.3
2022 0.369 192.5
2023 0.357 194.9
2024 0.344 197.4
2025 0.332 200.1
2026 0.319 203.0
2027 0.307 206.2
2028 0.294 209.6
2029 0.282 213.3
2030 0.270 217.4

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