16278-0822 RST3949Aa,Ab

 
 
16h 27m 48.23s -08 22' 18.1" P.A. 51 sep 0.92 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
2015
Obs
27
Pa first
51
Pa last
47
P.A. Now (θ)
51°
Sep first
0.8
Sep last
0.9
Sep. Now (ρ)
0.92"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 141187 16278-0822 RST3949 Aa,Ab 1938 2015 27 51 0.9 4.71 8.83 4.12 Y <===
Show Ups Oph 141187 16278-0822 SHY 287 AB 1991 2000 4 272 999.9 4.65 9.32 4.67
Show 141187 16278-0822 TOK 603 AC 1980 2000 4 202 776.2 4.65 8.85 4.20
Quadruple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
47.2
Precise sep
0.9
Constellation
Ophiuchus
SAO
141187
HIP
80628
Tycho2
5626-01388-1
HD
148367
HR
6129
GC
22134
BD
BD-08 4243
Bayer
Upsilon Ophiuchi
Bayer name
Ups Oph
Flamsteed
3 Ophiuchi
Flamsteed name
3 Oph
Distance
40.95
Distance ly
133.58
last precise pa
47.2
last precise sep
0.9
 
 
ORBITAL ELEMENTS
 
 
Period (P)82.8y± 1.4 Periastron (T)1994.1y± 1 Semi-major axis (a)0.79a± 0.03
Eccentricity (e)0.45± 0.03 Inclination (i)31.2°± 5.7 Longitude of periastron (ω)177.9°± 7.4
Node (Ω)86.8°± 6.9 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation2011
label rho theta
2000 0.471 326.6
2001 0.487 335.7
2002 0.507 344.1
2003 0.530 351.8
2004 0.556 358.8
2005 0.583 5.2
2006 0.612 11.0
2007 0.641 16.3
2008 0.671 21.1
2009 0.701 25.6
2010 0.731 29.6
2011 0.760 33.3
2012 0.789 36.8
2013 0.817 40.0
2014 0.844 43.0
2015 0.871 45.8
2016 0.896 48.5
2017 0.920 51.0
2018 0.943 53.4
2019 0.965 55.7
2020 0.986 57.9
2021 1.005 59.9
2022 1.023 62.0
2023 1.040 63.9
2024 1.056 65.8
2025 1.071 67.6
2026 1.084 69.4
2027 1.096 71.2
2028 1.106 72.9
2029 1.116 74.5
2030 1.124 76.2

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

grafico orbita





wds16278-0822a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
16278-0822 RST3949 Aa,Ab 2008 21 204 0.7 4.71 8.83 A3m N D 162748.23-082218.1
16278-0822 RST3949 Aa,Ab 2011 24 34 0.8 4.71 8.83 A3m NOD 162748.23-082218.1
16278-0822 RST3949 Aa,Ab 2015 27 47 0.9 4.71 8.83 A3m NO 162748.23-082218.1

If you need more information about this double, apply for a data request form to the WDS.