06451-1643 AGC   1AB (Sirio)

 
 
06H 45M 08.92S -16 42' 58.0" P.A. 76.4 SEP 10.58 MAG -1.46,8.5 SP A1VM 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
1861
Date last
2016
Obs
640
Pa first
85
Pa last
76
P.A. Now (θ)
76.4°
Sep first
10.4
Sep last
10.9
Sep. Now (ρ)
10.58"
Mag pri
-1.46
Mag sec
8.5
delta mag (ΔM)
9.96
Spectral class
A1Vm (white)
Pri motion ra
-055
Sec motion ra
Pri motion dec
-121
Sec motion dec
Notes
N O P (See Notes, Orbital solution, 100-year proper motion)
 
 
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 1861 2016 640 76 10.6 -1.46 8.50 9.96 Y <===
Show 151881 06451-1643 AGC 1 AD 1865 1915 2 183 31.6 -1.46 14.00 15.46
Show 151881 06451-1643 HL 3 AE 1865 2011 7 47 188.3 -1.46 14.50 15.96
Show 151881 06451-1643 BU 1411 AF 1877 2011 7 61 125.7 -1.46 13.80 15.26
Show 151881 06451-1643 AGC 1 BC 1920 2000 9 30 79.1 8.50 12.60 4.10
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
75.5
last precise sep
10.94
 
 
ORBITAL ELEMENTS
 
 
Period (P)50.13y Periastron (T)1894.3y Semi-major axis (a)7.48a
Eccentricity (e)0.585 Inclination (i)136.86° Longitude of periastron (ω)150.25°
Node (Ω)46.5° Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 4.477 151.9
2001 4.865 141.0
2002 5.294 131.7
2003 5.748 123.9
2004 6.212 117.2
2005 6.678 111.5
2006 7.136 106.5
2007 7.581 102.1
2008 8.009 98.2
2009 8.417 94.7
2010 8.803 91.5
2011 9.165 88.5
2012 9.501 85.8
2013 9.812 83.2
2014 10.095 80.8
2015 10.351 78.6
2016 10.578 76.4
2017 10.776 74.3
2018 10.944 72.3
2019 11.082 70.3
2020 11.189 68.4
2021 11.264 66.5
2022 11.306 64.7
2023 11.314 62.8
2024 11.288 61.0
2025 11.226 59.1
2026 11.128 57.2
2027 10.991 55.2
2028 10.814 53.2
2029 10.595 51.2
2030 10.333 49.0

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

grafico orbita





grafico misure orbit6