16044-1122 STF 1998 AC

 
 
16h 04m 22.13s -11° 22' 23.2" P.A. 45.00 sep 7.2 mag 4.84,7.30 Sp F5IV+G1V
 
 
Coord 2000 16044-1122 Discov num STF1998 Comp AC Coord arcsec 2000 16 04 22.13 -11 22 23.2
Date first 1780 Date last 2019 Obs 389
Pa first 91 Pa last 44.6 P.A. Now (θ) 44.6°
Sep first 6.4 Sep last 7.15 Sep. Now (ρ) 7.15"
Mag pri 4.84 Mag sec 7.30 delta mag (ΔM) 2.46 Spectral class F5IV+G1V (yellow-white/yellow)
Pri motion ra -074 Sec motion ra -075
Pri motion dec -033 Sec motion dec -012
Notes N O (See Notes, Orbital solution)
rPM=0.259 (< 0.3, Physical double)
This double is physical.
 
 
16044-1122 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Xi Sco 159665 16 04 22 -11 22 23 STF 1998 AB 2020 630 12 1.2 4.84 4.86 0.02 Y
Show 159665 16 04 22 -11 22 23 STF 1998 AC 2019 389 45 7.2 4.84 7.30 2.46 Y <===
Show 159665 16 04 22 -11 22 20 STF 1998 BC 2019 79 38 8.8 4.86 7.30 2.44
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Scorpius SAO 159665 HIP 78727 Tycho2 5619-01257-1
Gaia DR2 4343066192367555200 HD 144069 HR 5977 GC 21593
ADS 9909 BD BD-10 4237 Bayer Xi Scorpii Bayer name Xi Sco
Bayer greek ξ Sco
 
 
ORBITAL ELEMENTS
 
 
Period (P)1514.43y Periastron (T)2226.1y Semi-major axis (a)7.755a
Eccentricity (e)0.041 Inclination (i)131.5° Longitude of periastron (ω)59.3°
Node (Ω)47.4° Notesn ReferenceZir2008
Equinox2000 Last observation2005 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 46.3 7.574
2001 46.1 7.572
2002 46.0 7.571
2003 45.8 7.569
2004 45.6 7.567
2005 45.5 7.565
2006 45.3 7.563
2007 45.2 7.561
2008 45.0 7.558
2009 44.8 7.556
2010 44.7 7.554
2011 44.5 7.551
2012 44.3 7.549
2013 44.2 7.546
2014 44.0 7.543
2015 43.8 7.541
2016 43.7 7.538
2017 43.5 7.535
2018 43.3 7.532
2019 43.2 7.529
2020 43.0 7.526
2021 42.8 7.522
2022 42.7 7.519
2023 42.5 7.516
2024 42.3 7.512
2025 42.2 7.509
2026 42.0 7.505
2027 41.8 7.502
2028 41.6 7.498
2029 41.5 7.494
2030 41.3 7.490


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



 
 


wds16044-1122d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic