16278-0822 RST 3949 Aa,Ab

 
 
16h 27m 48.23s -08° 22' 18.1" P.A. 56.00 sep 1.0 mag 4.71,8.83 Sp A3m dist. 40.95 pc (133.58 l.y.)
 
 
Coord 2000 16278-0822 Discov num RST3949 Comp Aa,Ab Coord arcsec 2000 16 27 48.23 -08 22 18.1
Date first 1938 Date last 2019 Obs 29
Pa first 51 Pa last 56.1 P.A. Now (θ) 56.1°
Sep first 0.8 Sep last 0.984 Sep. Now (ρ) 0.984"
Mag pri 4.71 Mag sec 8.83 delta mag (ΔM) 4.12 Spectral class A3m (white)
Pri motion ra -067 Sec motion ra
Pri motion dec -013 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
16278-0822 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 141187 16 27 48 -08 22 18 RST 3949 Aa,Ab 2019 29 56 1.0 4.71 8.83 4.12 Y <===
Show Ups Oph 141187 16 27 48 -08 22 18 SHY 287 AB 2016 5 272 999.9 4.65 9.32 4.67
Show 141187 16 27 48 -08 22 18 TOK 603 AC 2016 7 202 775.0 4.65 8.85 4.20
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name NSV7738 Oph Constellation Ophiuchus SAO 141187 HIP 80628
Tycho2 5626-01388-1 Gaia DR2 4350816684193187584 HD 148367 HR 6129
GC 22134 BD BD-08 4243 Bayer Upsilon Ophiuchi Bayer name Ups Oph
Flamsteed 3 Ophiuchi Flamsteed name 3 Oph FK5 3299 Distance 40.95
Distance ly 133.58 Bayer greek υ Oph
 
 
ORBITAL ELEMENTS
 
 
Period (P)76.4608y± 1.1411 Periastron (T)1995.5151y± 0.8813 Semi-major axis (a)0.76338a± 0.03259
Eccentricity (e)0.48188± 0.03562 Inclination (i)25.442°± 8.411 Longitude of periastron (ω)128.099°± 20.3
Node (Ω)139.48°± 20.658 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 327.4 0.473
2001 336.6 0.501
2002 344.8 0.528
2003 352.2 0.555
2004 358.9 0.582
2005 5.1 0.608
2006 10.7 0.633
2007 15.9 0.658
2008 20.7 0.683
2009 25.2 0.707
2010 29.4 0.730
2011 33.4 0.753
2012 37.1 0.775
2013 40.6 0.797
2014 44.0 0.817
2015 47.1 0.837
2016 50.1 0.857
2017 53.0 0.876
2018 55.8 0.894
2019 58.5 0.911
2020 61.1 0.927
2021 63.5 0.943
2022 65.9 0.957
2023 68.3 0.971
2024 70.5 0.984
2025 72.8 0.997
2026 74.9 1.008
2027 77.0 1.019
2028 79.1 1.028
2029 81.1 1.037
2030 83.1 1.044


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



 
 


wds16278-0822b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic