16256-2327 H 2 19 AB (Rho Oph)

 
 
16h 25m 35.03s -23° 26' 47.0" P.A. 335.00 sep 3.0 mag 5.07,5.74 Sp B2IV+B2V dist. 110.74 pc (361.23 l.y.)
 
 
Coord 2000 16256-2327 Discov num H 2  19 Comp AB Coord arcsec 2000 16 25 35.03 -23 26 47.0
Date first 1832 Date last 2021 Obs 111
Pa first 3 Pa last 334.8 P.A. Now (θ) 334.8°
Sep first 3.8 Sep last 3.015 Sep. Now (ρ) 3.015"
Mag pri 5.07 Mag sec 5.74 delta mag (ΔM) 0.67 Spectral class B2IV+B2V (blue-white/blue-white)
Pri motion ra -014 Sec motion ra -014
Pri motion dec -027 Sec motion dec -027
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
16256-2327 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Rho Oph 184382 16 25 35 -23 26 47 H 2 19 AB 2021 111 335 3.0 5.07 5.74 0.67 Y <===
Show 184382 16 25 35 -23 26 47 H 2 19 AC 2021 16 0 151.1 5.07 7.29 2.22
Show 184382 16 25 35 -23 26 47 H 2 19 AD 2021 17 253 156.1 5.07 6.81 1.74
Show 16 25 35 -23 24 19 KOU 63 CF 2000 1 206 4.8 5.80 11.70 5.90
Show 184377 16 25 24 -23 27 37 BU 1115 DE 2018 21 196 0.3 6.81 8.42 1.61 Y
Sextuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Rho Oph Constellation Ophiuchus SAO 184382 HIP 80473
Tycho2 6794-00549-1 Gaia DR2 6050943410590451328 HD 147933 HR 6112
GC 22079 ADS 10049 CD CD-2312861 Bayer Rho Ophiuchi
Bayer name Rho Oph Flamsteed 5 Ophiuchi Flamsteed name 5 Oph Distance 110.74
Distance ly 361.23 Bayer greek ρ Oph
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
Identifier16256-2327
coord_arcsec_2000162535.03-232647.0
Period (P)4193.4346y± 2586.2103 Periastron (T)2332.5532y± 717.3906 Semi-major axis (a)12.63509a± 6.58339
Eccentricity (e)0.89588± 0.11915 Inclination (i)105.902°± 9.28 Longitude of periastron (ω)244.218°± 40.038
Node (Ω)88.335°± 52.556 Notesn ReferenceIzm2019
Equinox Last observation2012 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 337.4 3.053
2001 337.2 3.050
2002 337.0 3.048
2003 336.8 3.045
2004 336.6 3.043
2005 336.5 3.040
2006 336.3 3.038
2007 336.1 3.036
2008 335.9 3.033
2009 335.7 3.031
2010 335.5 3.028
2011 335.4 3.026
2012 335.2 3.024
2013 335.0 3.022
2014 334.8 3.019
2015 334.6 3.017
2016 334.5 3.015
2017 334.3 3.013
2018 334.1 3.010
2019 333.9 3.008
2020 333.7 3.006
2021 333.5 3.004
2022 333.3 3.002
2023 333.2 3.000
2024 333.0 2.997
2025 332.8 2.995
2026 332.6 2.993
2027 332.4 2.991
2028 332.2 2.989
2029 332.0 2.987
2030 331.9 2.985


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



 
 


wds16256-2327d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic