17530-0755 STF3128AB

 
 
17H 52M 58.64S -07 55' 10.2" P.A. 49.5 SEP 1.29 MAG 7.82,9.95 SP G0IV-V DIST. 58.45 PC (190.66 L.Y.)
 
 
Coord 2000
17530-0755
Discov num
STF3128
Comp
AB
Coord arcsec 2000
17 52 58.64 -07 55 10.2
Date first
1834
Date last
2009
Obs
27
Pa first
27
Pa last
51
P.A. Now (θ)
49.5°
Sep first
1.5
Sep last
1.2
Sep. Now (ρ)
1.29"
Mag pri
7.82
Mag sec
9.95
delta mag (ΔM)
2.13
Spectral class
G0IV-V (yellow)
Pri motion ra
-063
Sec motion ra
-066
Pri motion dec
-255
Sec motion dec
-255
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
17530-0755 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 17530-0755 STF3128 AB 1834 2009 27 50 1.3 7.82 9.95 2.13 Y <===
Show 17530-0755 STF3128 AC 1911 2011 3 86 97.7 7.82 13.60 5.78
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ophiuchus
HIP
87533
Tycho2
5674-00028-1
HD
162756
ADS
10858
BD
BD-07 4517
Distance
58.45
Distance ly
190.66
last precise pa
50.5
last precise sep
1.205
 
 
ORBITAL ELEMENTS
 
 
Period (P)409y Periastron (T)1947.6y Semi-major axis (a)0.965a
Eccentricity (e)0.942 Inclination (i)153° Longitude of periastron (ω)356°
Node (Ω)214° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 1.099 52.6
2001 1.111 52.4
2002 1.123 52.2
2003 1.134 52.0
2004 1.146 51.8
2005 1.157 51.6
2006 1.169 51.4
2007 1.180 51.3
2008 1.191 51.1
2009 1.202 50.9
2010 1.212 50.8
2011 1.223 50.6
2012 1.233 50.4
2013 1.244 50.3
2014 1.254 50.1
2015 1.264 50.0
2016 1.274 49.8
2017 1.284 49.7
2018 1.294 49.5
2019 1.303 49.4
2020 1.313 49.2
2021 1.322 49.1
2022 1.332 48.9
2023 1.341 48.8
2024 1.350 48.7
2025 1.359 48.5
2026 1.368 48.4
2027 1.376 48.3
2028 1.385 48.1
2029 1.394 48.0
2030 1.402 47.9

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