06451-1643 AGC   1AB (Sirio)

 
 
06H 45M 08.92S -16 42' 58.0" P.A. 74.3 SEP 10.78 MAG -1.47,8.44 SP A1VM+DA2 DIST. 2.64 PC (8.61 L.Y.)
 
 
Coord 2000
06451-1643
Discov num
AGC   1
Comp
AB
Coord arcsec 2000
06 45 08.92 -16 42 58.0
Date first
1862
Date last
2016
Obs
2060
Pa first
85
Pa last
75
P.A. Now (θ)
74.3°
Sep first
10.2
Sep last
10.7
Sep. Now (ρ)
10.78"
Mag pri
-1.47
Mag sec
8.44
delta mag (ΔM)
9.91
Spectral class
A1Vm+DA2 (white)
Pri motion ra
-055
Sec motion ra
-055
Pri motion dec
-122
Sec motion dec
-122
Notes
N O P (See Notes, Orbital solution, 100-year proper motion)
This double is physical.
 
 
06451-1643 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Sirio 151881 06451-1643 AGC 1 AB 1862 2016 2060 74 10.8 -1.47 8.44 9.91 Y <===
Show 151881 06451-1643 LEC 1 AC 1999 1999 1 30 64.5 -1.47 12.60 14.07
Show 151881 06451-1643 AGC 1 AD 1865 1915 2 183 31.6 -1.47 14.00 15.47
Show 151881 06451-1643 HL 3 AE 1865 2011 7 47 188.3 -1.47 14.50 15.97
Show 151881 06451-1643 BU 1411 AF 1877 2011 7 61 125.7 -1.47 13.80 15.27
Show 151881 06451-1643 AGC 1 BC 1920 1929 7 129 1.4 8.44 12.60 4.16
Sextuple system
6 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name
Sirio
Meaning
burning or hot
Other names
SIRIUS, CANICULA, DOG STAR, ASCHERE
Constellation
Canis Major
SAO
151881
HIP
32349
HD
48915
HR
2491
GC
8833
ADS
5423
GL
Gl 244A
BD
BD-16 1591
Bayer
Alpha Canis Majoris
Bayer name
Alp CMa
Flamsteed
9 Canis Majoris
Flamsteed name
9 CMa
Distance
2.64
Distance ly
8.61
last precise pa
74.7
last precise sep
10.698
 
 
ORBITAL ELEMENTS
 
 
Period (P)50.1284y± 0.0043 Periastron (T)1994.5715y± 0.0058 Semi-major axis (a)7.4957a± 0.0025
Eccentricity (e)0.59142± 0.00037 Inclination (i)136.336°± 0.04 Longitude of periastron (ω)149.161°± 0.075
Node (Ω)45.4°± 0.071 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2016
label rho theta
2000 4.460 151.2
2001 4.846 140.3
2002 5.272 131.1
2003 5.724 123.3
2004 6.188 116.6
2005 6.652 110.9
2006 7.109 105.9
2007 7.554 101.6
2008 7.982 97.7
2009 8.391 94.1
2010 8.777 91.0
2011 9.141 88.0
2012 9.479 85.3
2013 9.792 82.8
2014 10.078 80.4
2015 10.337 78.1
2016 10.567 76.0
2017 10.769 73.9
2018 10.941 71.9
2019 11.082 70.0
2020 11.193 68.1
2021 11.273 66.2
2022 11.320 64.4
2023 11.333 62.5
2024 11.313 60.7
2025 11.256 58.8
2026 11.163 57.0
2027 11.032 55.1
2028 10.861 53.1
2029 10.648 51.1
2030 10.392 48.9

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