18171-4336 HDS2583

 
 
18h 17m 03.81s -43 35' 41.3" P.A. 32.9 sep 0.06 mag 8.88,9.95 Sp G8/K0III+ dist. 395.26 pc (1289.34 l.y.)
 
 
Coord 2000
18171-4336
Discov num
HDS2583
Comp
Coord arcsec 2000
18 17 03.81 -43 35 41.3
Date first
1991
Date last
2017
Obs
9
Pa first
190
Pa last
50
P.A. Now (θ)
32.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.06"
Mag pri
8.88
Mag sec
9.95
delta mag (ΔM)
1.07
Spectral class
G8/K0III+ (yellow)
Pri motion ra
+005
Sec motion ra
Pri motion dec
-010
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
49.9
Precise sep
0.054
Constellation
Corona Austrina
SAO
228868
HIP
89599
Tycho2
7912-00277-1
Gaia DR2
78662666624
HD
167384
CD
CD-4312414
CP
CP-43 8532
Distance
395.26
Distance ly
1289.34
last precise pa
49.9
last precise sep
0.054
 
 
ORBITAL ELEMENTS
 
 
Period (P)332.169y Periastron (T)2014.309y Semi-major axis (a)0.196a
Eccentricity (e)0.718 Inclination (i)148.4° Longitude of periastron (ω)291.1°
Node (Ω)8.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2018
label rho theta
2000 0.093 170.8
2001 0.089 167.8
2002 0.085 164.6
2003 0.080 160.9
2004 0.076 156.9
2005 0.072 152.4
2006 0.067 147.2
2007 0.063 141.4
2008 0.059 134.8
2009 0.056 127.4
2010 0.053 118.9
2011 0.050 109.5
2012 0.048 99.3
2013 0.048 88.6
2014 0.048 77.8
2015 0.049 67.3
2016 0.051 57.4
2017 0.054 48.4
2018 0.057 40.2
2019 0.060 32.9
2020 0.063 26.4
2021 0.067 20.6
2022 0.070 15.3
2023 0.074 10.6
2024 0.078 6.3
2025 0.081 2.4
2026 0.085 358.8
2027 0.088 355.5
2028 0.091 352.4
2029 0.095 349.6
2030 0.098 346.9

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

grafico orbita





wds18171-4336b.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
18171-4336 HDS2583 1991 1 190 0.1 8.88 9.95 G8/K0III+ 181703.81-433541.3
18171-4336 HDS2583 2009 3 125 0.1 8.88 9.95 G8/K0III+ 181703.81-433541.3
18171-4336 HDS2583 2013 4 81 0.0 8.88 9.95 G8/K0III+ 181703.81-433541.3
18171-4336 HDS2583 2014 5 75 0.0 8.88 9.95 G8/K0III+ O 181703.81-433541.3
18171-4336 HDS2583 2015 7 64 0.1 8.88 9.95 G8/K0III+ O 181703.81-433541.3
18171-4336 HDS2583 2017 9 50 0.1 8.88 9.95 G8/K0III+ O 181703.81-433541.3

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