19471-1953 BU  146

 
 
19h 47m 06.75s -19 52' 50.4" P.A. 244.7 sep 0.79 mag 8.61,9.52 Sp G1/2V dist. 96.53 pc (314.88 l.y.)
 
 
Coord 2000
19471-1953
Discov num
BU  146
Comp
Coord arcsec 2000
19 47 06.75 -19 52 50.4
Date first
1873
Date last
2010
Obs
33
Pa first
290
Pa last
58
P.A. Now (θ)
244.7°
Sep first
1.0
Sep last
0.5
Sep. Now (ρ)
0.79"
Mag pri
8.61
Mag sec
9.52
delta mag (ΔM)
0.91
Spectral class
G1/2V (yellow)
Pri motion ra
-044
Sec motion ra
-044
Pri motion dec
-033
Sec motion dec
-033
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
57.8
Precise sep
0.539
Constellation
Sagittarius
SAO
188563
HIP
97348
Tycho2
6320-00835-1
HD
186752
ADS
12909
BD
BD-20 5705
Distance
96.53
Distance ly
314.88
last precise pa
57.8
last precise sep
0.539
 
 
ORBITAL ELEMENTS
 
 
Period (P)260.15y Periastron (T)2262.78y Semi-major axis (a)1.565a
Eccentricity (e)0.886 Inclination (i)70.7° Longitude of periastron (ω)262.6°
Node (Ω)228.4° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.313 47.5
2001 0.233 54.6
2002 0.125 71.9
2003 0.068 167.9
2004 0.180 212.7
2005 0.284 222.8
2006 0.366 227.7
2007 0.434 231.0
2008 0.491 233.4
2009 0.540 235.3
2010 0.583 237.0
2011 0.621 238.4
2012 0.656 239.7
2013 0.687 240.9
2014 0.716 241.9
2015 0.742 242.9
2016 0.766 243.8
2017 0.789 244.7
2018 0.810 245.5
2019 0.830 246.2
2020 0.848 247.0
2021 0.865 247.7
2022 0.882 248.4
2023 0.897 249.0
2024 0.911 249.7
2025 0.925 250.3
2026 0.938 250.9
2027 0.950 251.5
2028 0.962 252.0
2029 0.973 252.6
2030 0.983 253.1

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

grafico orbita





wds19471-1953a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19471-1953 BU 146 1991 29 28 0.6 8.61 9.52 G1/2V OD 194706.75-195250.4
19471-1953 BU 146 2009 32 235 0.6 8.61 9.52 G1/2V OD 194706.75-195250.4
19471-1953 BU 146 2010 33 58 0.5 8.61 9.52 G1/2V OD 194706.75-195250.4

If you need more information about this double, apply for a data request form to the WDS.