16044-1122 STF1998AB (Grafias)

 
 
16H 04M 22.13S -11 22' 23.2" P.A. 7.1 SEP 1.1 MAG 5.16,4.87 SP F7V
 
 
Coord 2000
16044-1122
Discov num
STF1998
Comp
AB
Coord arcsec 2000
16 04 22.13 -11 22 23.2
Date first
1825
Date last
2016
Obs
611
Pa first
356
Pa last
10
P.A. Now (θ)
7.1°
Sep first
1.2
Sep last
1.1
Sep. Now (ρ)
1.1"
Mag pri
5.16
Mag sec
4.87
delta mag (ΔM)
0.29
Spectral class
F7V (yellow-white)
Pri motion ra
-072
Sec motion ra
Pri motion dec
-035
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
16044-1122 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Grafias 159665 16044-1122 STF1998 AB 1825 2016 611 7 1.1 5.16 4.87 0.29 Y <===
Show 159665 16044-1122 STF1998 AC 1780 2016 384 44 7.5 5.16 7.30 2.14 Y
Show 159665 16044-1122 STF1998 BC 1830 2012 76 42 7.6 4.87 7.30 2.43
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name
Grafias
Meaning
crab claw
Constellation
Scorpius
SAO
159665
HIP
78727
Tycho2
5619-01257-1
HD
144069
HR
5977
GC
21593
ADS
9909
Bayer
Xi Scorpii
Bayer name
Xi Sco
last precise pa
9.5
last precise sep
1.074
 
 
ORBITAL ELEMENTS
 
 
Period (P)45.9y± 0.6 Periastron (T)1997.22y± 0.02 Semi-major axis (a)0.654a± 0.006
Eccentricity (e)0.744± 0.001 Inclination (i)34.5°± 1 Longitude of periastron (ω)163.8°± 5
Node (Ω)25.3°± 4 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2006
label rho theta
2000 0.326 300.7
2001 0.406 314.6
2002 0.483 324.0
2003 0.555 330.8
2004 0.622 336.2
2005 0.684 340.5
2006 0.741 344.1
2007 0.793 347.3
2008 0.841 350.0
2009 0.885 352.5
2010 0.924 354.8
2011 0.960 356.9
2012 0.992 358.8
2013 1.021 0.6
2014 1.046 2.3
2015 1.067 4.0
2016 1.086 5.6
2017 1.100 7.1
2018 1.112 8.6
2019 1.121 10.1
2020 1.126 11.6
2021 1.128 13.0
2022 1.126 14.5
2023 1.122 16.0
2024 1.114 17.4
2025 1.102 18.9
2026 1.087 20.5
2027 1.069 22.1
2028 1.046 23.7
2029 1.020 25.5
2030 0.990 27.3

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