17104-1544 BU 1118 AB (Sabik)

 
 
17h 10m 22.66s -15° 43' 30.5" P.A. 225.00 sep 0.4 mag 3.05,3.27 Sp A1IV+A1IV dist. 27.09 pc (88.37 l.y.)
 
 
Coord 2000 17104-1544 Discov num BU 1118 Comp AB Coord arcsec 2000 17 10 22.66 -15 43 30.5
Date first 1889 Date last 2021 Obs 246
Pa first 274 Pa last 225.4 P.A. Now (θ) 223.9°
Sep first 0.4 Sep last 0.408 Sep. Now (ρ) 0.345"
Mag pri 3.05 Mag sec 3.27 delta mag (ΔM) 0.22 Spectral class A1IV+A1IV (white/white)
Pri motion ra +045 Sec motion ra
Pri motion dec +064 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
17104-1544 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Sabik 160332 17 10 23 -15 43 30 BU 1118 AB 2021 246 225 0.4 3.05 3.27 0.22 Y <===
Show Eta Oph 160332 17 10 23 -15 43 30 BU 1118 AB,C 2012 6 148 99.8 2.42 12.34 9.92
Show Sabik 160332 17 10 23 -15 43 30 BU 1118 AD 2012 8 281 101.2 2.42 11.20 8.78
Show Sabik 160332 17 10 23 -15 43 30 DAL 52 AE 2012 2 317 62.7 2.42 11.10 8.68
Quintuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Sabik Constellation Ophiuchus SAO 160332 HIP 84012
Tycho2 6232-01333-1 HD 155125 HR 6378 GC 23158
ADS 10374 GL Gl 656.1A BD BD-15 4467 Bayer Eta Ophiuchi
Bayer name Eta Oph Flamsteed 35 Ophiuchi Flamsteed name 35 Oph Distance 27.09
Distance ly 88.37 Bayer greek η Oph
 
 
ORBITAL ELEMENTS
 
 
Period (P)87.58y± 1 Periastron (T)2024.68y± 0.5 Semi-major axis (a)1.396a± 0.01
Eccentricity (e)0.95± 0.02 Inclination (i)95.2°± 2 Longitude of periastron (ω)274.8°± 2
Node (Ω)38.9°± 1 Notesn ReferenceDoc2007d
Equinox2000 Last observation2006 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 242.3 0.532
2001 241.5 0.540
2002 240.7 0.547
2003 240.0 0.554
2004 239.2 0.560
2005 238.5 0.566
2006 237.8 0.571
2007 237.1 0.575
2008 236.4 0.578
2009 235.8 0.580
2010 235.1 0.581
2011 234.4 0.581
2012 233.8 0.580
2013 233.1 0.577
2014 232.4 0.573
2015 231.7 0.567
2016 231.0 0.558
2017 230.2 0.546
2018 229.5 0.532
2019 228.6 0.512
2020 227.7 0.487
2021 226.7 0.455
2022 225.5 0.410
2023 223.9 0.345
2024 221.2 0.228
2025 38.1 0.143
2026 33.0 0.266
2027 30.3 0.310
2028 28.1 0.332
2029 26.1 0.344
2030 24.2 0.350


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



 
 


wds17104-1544a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic