11210-5429 I   879 (Pi Cen)

 
 
11H 21M 00.40S -54 29' 27.7" P.A. 106.4 SEP 0.28 MAG 4.08,5.65 SP B5VN DIST. 109.65 PC (357.68 L.Y.)
 
 
Coord 2000
11210-5429
Discov num
I   879
Comp
Coord arcsec 2000
11 21 00.40 -54 29 27.7
Date first
1910
Date last
2015
Obs
57
Pa first
140
Pa last
100
P.A. Now (θ)
106.4°
Sep first
0.5
Sep last
0.2
Sep. Now (ρ)
0.28"
Mag pri
4.08
Mag sec
5.65
delta mag (ΔM)
1.57
Spectral class
B5Vn (blue-white)
Pri motion ra
-040
Sec motion ra
-040
Pri motion dec
-003
Sec motion dec
-003
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Pi Cen
Constellation
Centaurus
SAO
238986
HIP
55425
Tycho2
8621-02002-1
HD
98718
HR
4390
GC
15601
CP
CP-53 4498
Bayer
Pi Centauri
Bayer name
Pi Cen
Distance
109.65
Distance ly
357.68
last precise pa
99.9
last precise sep
0.229
 
 
ORBITAL ELEMENTS
 
 
Period (P)39y± 0.19 Periastron (T)2010.41y± 0.037 Semi-major axis (a)0.2263a± 0.0011
Eccentricity (e)0.853± 0.004 Inclination (i)19.4°± 4.9 Longitude of periastron (ω)340.3°± 4
Node (Ω)327.8°± 3.9 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2012
label rho theta
2000 0.356 142.6
2001 0.340 144.5
2002 0.323 146.7
2003 0.303 149.0
2004 0.280 151.8
2005 0.254 155.0
2006 0.224 159.1
2007 0.190 164.5
2008 0.150 172.6
2009 0.102 187.6
2010 0.045 237.8
2011 0.056 33.1
2012 0.108 71.4
2013 0.152 85.5
2014 0.190 93.5
2015 0.223 98.9
2016 0.251 103.1
2017 0.277 106.4
2018 0.299 109.2
2019 0.319 111.6
2020 0.337 113.8
2021 0.353 115.8
2022 0.366 117.6
2023 0.378 119.2
2024 0.388 120.8
2025 0.397 122.3
2026 0.404 123.8
2027 0.409 125.2
2028 0.413 126.6
2029 0.416 127.9
2030 0.417 129.3

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