16094-3103 I   557

 
 
16H 09M 26.97S -31 03' 11.2" P.A. 195 SEP 0.34 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
20
Pa last
15
P.A. Now (θ)
195°
Sep first
0.5
Sep last
0.2
Sep. Now (ρ)
0.34"
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
 
 
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)195.6° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.062 345.1
2001 0.067 357.1
2002 0.067 7.9
2003 0.056 20.4
2004 0.027 52.1
2005 0.031 149.3
2006 0.066 174.0
2007 0.100 181.4
2008 0.132 185.1
2009 0.160 187.4
2010 0.186 189.1
2011 0.210 190.4
2012 0.232 191.4
2013 0.253 192.2
2014 0.273 192.9
2015 0.291 193.5
2016 0.309 194.1
2017 0.326 194.6
2018 0.342 195.0
2019 0.357 195.4
2020 0.371 195.8
2021 0.385 196.1
2022 0.398 196.4
2023 0.411 196.7
2024 0.423 197.0
2025 0.435 197.3
2026 0.446 197.5
2027 0.457 197.8
2028 0.467 198.0
2029 0.477 198.2
2030 0.487 198.5

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