17156-1018 BU  957

 
 
17h 15m 34.66s -10 17' 50.9" P.A. 93.9 sep 0.05 mag 7.51,9.69 Sp F5V dist. 108.11 pc (352.65 l.y.)
 
 
Coord 2000
17156-1018
Discov num
BU  957
Comp
Coord arcsec 2000
17 15 34.66 -10 17 50.9
Date first
1880
Date last
2014
Obs
46
Pa first
24
Pa last
159
P.A. Now (θ)
93.9°
Sep first
0.6
Sep last
0.1
Sep. Now (ρ)
0.05"
Mag pri
7.51
Mag sec
9.69
delta mag (ΔM)
2.18
Spectral class
F5V (yellow-white)
Pri motion ra
-009
Sec motion ra
-009
Pri motion dec
+022
Sec motion dec
+022
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
158.7
Precise sep
0.079
Constellation
Ophiuchus
SAO
160405
HIP
84423
Tycho2
5649-00247-1
HD
156023
ADS
10421
BD
BD-10 4462
Distance
108.11
Distance ly
352.65
last precise pa
158.7
last precise sep
0.079
 
 
ORBITAL ELEMENTS
 
 
Period (P)90.33y± 1.52 Periastron (T)1934.61y± 2.41 Semi-major axis (a)0.296a± 0.013
Eccentricity (e)0.554± 0.067 Inclination (i)102°± 4.6 Longitude of periastron (ω)± 11.3
Node (Ω)23°± 2.1 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.312 193.8
2001 0.299 193.1
2002 0.284 192.4
2003 0.270 191.6
2004 0.254 190.8
2005 0.238 189.8
2006 0.222 188.6
2007 0.205 187.3
2008 0.187 185.7
2009 0.169 183.8
2010 0.150 181.4
2011 0.131 178.3
2012 0.111 174.2
2013 0.092 168.3
2014 0.074 159.4
2015 0.058 145.2
2016 0.047 122.6
2017 0.046 93.9
2018 0.055 69.7
2019 0.070 54.0
2020 0.087 44.0
2021 0.103 37.3
2022 0.117 32.4
2023 0.128 28.3
2024 0.132 24.8
2025 0.131 21.3
2026 0.123 17.6
2027 0.109 13.1
2028 0.091 7.0
2029 0.071 357.7
2030 0.053 341.4

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

grafico orbita





wds17156-1018a.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
17156-1018 BU 957 1999 44 184 0.3 7.51 9.69 F5V NOD 171534.66-101750.9
17156-1018 BU 957 2009 45 180 0.1 7.51 9.69 F5V NOD 171534.66-101750.9
17156-1018 BU 957 2013 46 165 0.1 7.51 9.69 F5V NO 171534.66-101750.9
17156-1018 BU 957 2014 46 159 0.1 7.51 9.69 F5V NO 171534.66-101750.9

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