12154+4008 A  1999

 
 
12H 15M 26.22S +40 07' 41.1" P.A. 159.9 SEP 0.3 MAG 9.09,11.33 SP G9IV DIST. 41.03 PC (133.84 L.Y.)
 
 
Coord 2000
12154+4008
Discov num
A  1999
Comp
Coord arcsec 2000
12 15 26.22 +40 07 41.1
Date first
1909
Date last
2010
Obs
24
Pa first
312
Pa last
64
P.A. Now (θ)
159.9°
Sep first
0.8
Sep last
0.2
Sep. Now (ρ)
0.3"
Mag pri
9.09
Mag sec
11.33
delta mag (ΔM)
2.24
Spectral class
G9IV (yellow)
Pri motion ra
-177
Sec motion ra
Pri motion dec
+038
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
64
Precise sep
0.22
Constellation
Canes Venatici
SAO
44093
HIP
59776
Tycho2
3017-01745-1
HD
106592
ADS
8480
BD
BD+40 2514
Distance
41.03
Distance ly
133.84
last precise pa
64
last precise sep
0.22
 
 
ORBITAL ELEMENTS
 
 
Period (P)200.01y Periastron (T)2014.08y Semi-major axis (a)0.983a
Eccentricity (e)0.589 Inclination (i)58° Longitude of periastron (ω)279.4°
Node (Ω)198.1° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2012
label rho theta
2000 0.616 24.5
2001 0.587 26.5
2002 0.557 28.8
2003 0.525 31.4
2004 0.491 34.3
2005 0.456 37.6
2006 0.419 41.5
2007 0.382 46.1
2008 0.344 51.8
2009 0.307 58.9
2010 0.273 67.7
2011 0.244 79.0
2012 0.224 92.7
2013 0.215 108.3
2014 0.220 124.2
2015 0.238 138.6
2016 0.265 150.4
2017 0.297 159.9
2018 0.332 167.5
2019 0.368 173.6
2020 0.403 178.6
2021 0.437 182.8
2022 0.469 186.4
2023 0.500 189.6
2024 0.528 192.4
2025 0.553 195.0
2026 0.577 197.3
2027 0.599 199.4
2028 0.619 201.4
2029 0.638 203.3
2030 0.655 205.1

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