16094-3103 I   557

 
 
16h 09m 26.97s -31 03' 11.2" P.A. 194.6 sep 0.33 mag 7.80,8.20 Sp A7IV
 
 
Coord 2000
16094-3103
Discov num
I   557
Comp
Coord arcsec 2000
16 09 26.97 -31 03 11.2
Date first
1909
Date last
2014
Obs
21
Pa first
200
Pa last
195
P.A. Now (θ)
194.6°
Sep first
0.5
Sep last
0.2
Sep. Now (ρ)
0.33"
Mag pri
7.80
Mag sec
8.20
delta mag (ΔM)
0.4
Spectral class
A7IV (white)
Pri motion ra
-069
Sec motion ra
Pri motion dec
-074
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
195.2
Precise sep
0.216
Constellation
Scorpius
SAO
207395
Tycho2
7330-02616-1
HD
144926
last precise pa
15.2
last precise sep
0.216
 
 
ORBITAL ELEMENTS
 
 
Period (P)184.87y Periastron (T)2003.34y Semi-major axis (a)0.425a
Eccentricity (e)0.867 Inclination (i)73.7° Longitude of periastron (ω)215°
Node (Ω)15.6° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.062 165.1
2001 0.067 177.1
2002 0.067 187.9
2003 0.056 200.4
2004 0.027 232.1
2005 0.031 329.3
2006 0.066 354.0
2007 0.100 1.4
2008 0.132 5.1
2009 0.160 7.4
2010 0.186 9.1
2011 0.210 10.4
2012 0.232 11.4
2013 0.253 12.2
2014 0.273 12.9
2015 0.291 13.5
2016 0.309 14.1
2017 0.326 14.6
2018 0.342 15.0
2019 0.357 15.4
2020 0.371 15.8
2021 0.385 16.1
2022 0.398 16.4
2023 0.411 16.7
2024 0.423 17.0
2025 0.435 17.3
2026 0.446 17.5
2027 0.457 17.8
2028 0.467 18.0
2029 0.477 18.2
2030 0.487 18.5

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

grafico orbita





wds16094-3103a.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
16094-3103 I 557 1990 19 242 0.1 7.80 8.20 A7IV 160926.97-310311.2
16094-3103 I 557 2008 20 187 0.1 7.80 8.20 A7IV 160926.97-310311.2
16094-3103 I 557 2014 21 195 0.2 7.80 8.20 A7IV O 160926.97-310311.2

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