17308-3726 B   912

 
 
17h 30m 47.97s -37 26' 12.9" P.A. 186.2 sep 0.28 mag 7.48,7.96 Sp A0/1(V) dist. 142.65 pc (465.32 l.y.)
 
 
Coord 2000
17308-3726
Discov num
B   912
Comp
Coord arcsec 2000
17 30 47.97 -37 26 12.9
Date first
1927
Date last
2010
Obs
41
Pa first
259
Pa last
169
P.A. Now (θ)
186.2°
Sep first
0.2
Sep last
0.3
Sep. Now (ρ)
0.28"
Mag pri
7.48
Mag sec
7.96
delta mag (ΔM)
0.48
Spectral class
A0/1(V) (white)
Pri motion ra
-003
Sec motion ra
Pri motion dec
-032
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
168.7
Precise sep
0.257
Constellation
Scorpius
SAO
208897
HIP
85700
Tycho2
7387-00852-1
HD
158409
CD
CD-3711639
CP
CP-37 7240
Distance
142.65
Distance ly
465.32
last precise pa
168.7
last precise sep
0.257
 
 
ORBITAL ELEMENTS
 
 
Period (P)132.256y Periastron (T)1944.75y Semi-major axis (a)0.297a
Eccentricity (e)0.113 Inclination (i)44.9° Longitude of periastron (ω)116.2°
Node (Ω)226.8° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.232 140.0
2001 0.233 143.1
2002 0.234 146.2
2003 0.236 149.3
2004 0.237 152.3
2005 0.239 155.3
2006 0.242 158.2
2007 0.244 161.1
2008 0.247 163.9
2009 0.250 166.6
2010 0.253 169.3
2011 0.256 171.9
2012 0.259 174.4
2013 0.263 176.9
2014 0.266 179.3
2015 0.270 181.7
2016 0.273 184.0
2017 0.276 186.2
2018 0.280 188.4
2019 0.283 190.5
2020 0.286 192.6
2021 0.289 194.7
2022 0.292 196.7
2023 0.295 198.6
2024 0.298 200.6
2025 0.300 202.4
2026 0.302 204.3
2027 0.305 206.1
2028 0.306 207.9
2029 0.308 209.7
2030 0.309 211.5

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

grafico orbita





wds17308-3726a.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
17308-3726 B 912 1991 38 110 0.2 7.48 7.96 A0/1(V) NO 173047.97-372612.9
17308-3726 B 912 2008 40 166 0.2 7.48 7.96 A0/1(V) NO 173047.97-372612.9
17308-3726 B 912 2010 41 169 0.3 7.48 7.96 A0/1(V) NO 173047.97-372612.9

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