13081-7719 HDS1839

 
 
13h 08m 02.87s -77 18' 35.3" P.A. 246.20 sep 0.1 mag 9.03,11.30 Sp K3V dist. 42.84 pc (139.74 l.y.)
 
 
Coord 2000
13081-7719
Discov num
HDS1839
Comp
Coord arcsec 2000
13 08 02.87 -77 18 35.3
Date first
1991
Date last
2019
Obs
8
Pa first
163
Pa last
245
P.A. Now (θ)
246.2°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.12"
Mag pri
9.03
Mag sec
11.30
delta mag (ΔM)
2.27
Spectral class
K3V (yellow-orange)
Pri motion ra
+047
Sec motion ra
Pri motion dec
-068
Sec motion dec
Notes
O (Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
245.4
Precise sep
0.107
Constellation
Chamaeleon
HIP
64091
Tycho2
9417-00642-1
Gaia DR2
86871098624
HD
113693
GL
NN 3761
CP
CP-76 747
Distance
42.84
Distance ly
139.74
last precise pa
245.4
last precise sep
0.107
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)17.44y± 1.03 Periastron (T)2014.11y± 0.84 Semi-major axis (a)0.2007a± 0.0124
Eccentricity (e)0.168± 0.104 Inclination (i)120.5°± 2.5 Longitude of periastron (ω)320.5°± 19
Node (Ω)349.2°± 5.4 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.148 319.5
2001 0.123 296.6
2002 0.110 264.8
2003 0.124 233.2
2004 0.153 211.0
2005 0.185 196.4
2006 0.210 185.8
2007 0.224 177.1
2008 0.224 168.9
2009 0.207 160.0
2010 0.175 148.6
2011 0.131 130.6
2012 0.094 95.6
2013 0.098 46.0
2014 0.135 14.3
2015 0.166 356.2
2016 0.173 342.1
2017 0.159 327.3
2018 0.133 307.8
2019 0.113 279.6
2020 0.115 246.2
2021 0.139 219.6
2022 0.171 202.1
2023 0.200 190.1
2024 0.220 180.8
2025 0.226 172.5
2026 0.216 164.1
2027 0.191 154.1
2028 0.151 139.8
2029 0.107 113.9
2030 0.090 67.1

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






wds13081-7719a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)17.01y± 0.36 Periastron (T)2015.01y± 0.36 Semi-major axis (a)0.205a± 0.005
Eccentricity (e)0.16± 0.026 Inclination (i)119.5°± 1.2 Longitude of periastron (ω)163.6°± 7.6
Node (Ω)167.8°± 1.5 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation2018
label rho theta
2000 0.152 325.2
2001 0.120 301.5
2002 0.103 264.8
2003 0.120 227.7
2004 0.157 204.4
2005 0.194 190.3
2006 0.222 180.3
2007 0.235 172.1
2008 0.233 164.3
2009 0.214 155.7
2010 0.179 144.6
2011 0.135 126.8
2012 0.099 93.4
2013 0.101 46.5
2014 0.137 14.8
2015 0.167 356.2
2016 0.172 341.5
2017 0.152 325.4
2018 0.120 301.8
2019 0.103 265.2
2020 0.119 228.0
2021 0.156 204.6
2022 0.194 190.4
2023 0.221 180.4
2024 0.235 172.2
2025 0.233 164.4
2026 0.214 155.8
2027 0.180 144.7
2028 0.136 127.1
2029 0.099 93.9
2030 0.101 46.9

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






wds13081-7719b.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
13081-7719 HDS1839 1991 1 163 0.2 9.03 11.30 K3V 130802.87-771835.3
13081-7719 HDS1839 2014 2 190 0.1 9.03 11.30 K3V 130802.87-771835.3
13081-7719 HDS1839 2015 3 353 0.2 9.03 11.30 K3V 130802.87-771835.3
13081-7719 HDS1839 2017 5 317 0.1 9.03 11.30 K3V O 130802.87-771835.3
13081-7719 HDS1839 2018 6 300 0.1 9.03 11.30 K3V O 130802.87-771835.3
13081-7719 HDS1839 2019 8 245 0.1 9.03 11.30 K3V O 130802.87-771835.3

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