16283-1613 RST3950

 
 
16h 28m 16.06s -16 12' 43.6" P.A. 50.4 sep 0.26 mag 7.60,8.78 Sp F5V dist. 74.91 pc (244.36 l.y.)
 
 
Coord 2000
16283-1613
Discov num
RST3950
Comp
Coord arcsec 2000
16 28 16.06 -16 12 43.6
Date first
1937
Date last
2017
Obs
21
Pa first
55
Pa last
50
P.A. Now (θ)
50.4°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.26"
Mag pri
7.60
Mag sec
8.78
delta mag (ΔM)
1.18
Spectral class
F5V (yellow-white)
Pri motion ra
-013
Sec motion ra
Pri motion dec
-022
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
50.1
Precise sep
0.26
Constellation
Ophiuchus
SAO
159929
HIP
80677
Tycho2
6203-00500-1
HD
148394
BD
BD-15 4324
Distance
74.91
Distance ly
244.36
last precise pa
50.1
last precise sep
0.26
 
 
ORBITAL ELEMENTS
 
 
Period (P)26.55y± 0.1 Periastron (T)2000.92y± 0.4 Semi-major axis (a)0.176a± 0.014
Eccentricity (e)0.858± 0.02 Inclination (i)148.3°± 12 Longitude of periastron (ω)259.8°± 15
Node (Ω)137.8°± 17 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2005
label rho theta
2000 0.075 352.6
2001 0.023 208.6
2002 0.087 117.3
2003 0.131 101.6
2004 0.164 93.1
2005 0.190 87.2
2006 0.211 82.6
2007 0.229 78.8
2008 0.244 75.6
2009 0.255 72.6
2010 0.265 69.9
2011 0.272 67.4
2012 0.276 64.9
2013 0.279 62.5
2014 0.280 60.2
2015 0.279 57.8
2016 0.275 55.5
2017 0.270 53.0
2018 0.263 50.4
2019 0.253 47.7
2020 0.242 44.7
2021 0.227 41.3
2022 0.210 37.5
2023 0.190 32.9
2024 0.166 27.1
2025 0.137 19.1
2026 0.100 5.9
2027 0.050 330.7
2028 0.054 138.3
2029 0.108 108.6
2030 0.147 97.3

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

grafico orbita





wds16283-1613a.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
16283-1613 RST3950 2005 16 84 0.2 7.60 8.78 F5V O 162816.06-161243.6
16283-1613 RST3950 2008 18 73 0.3 7.60 8.78 F5V O 162816.06-161243.6
16283-1613 RST3950 2015 19 56 0.3 7.60 8.78 F5V NO 162816.06-161243.6
16283-1613 RST3950 2017 21 50 0.3 7.60 8.78 F5V NO 162816.06-161243.6

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