00164-7024 HEI 198

 
 
00h 16m 24.38s -70 23' 32.6" P.A. 198.3 sep 0.09 mag 7.80,8.26 Sp F8V dist. 193.05 pc (629.73 l.y.)
 
 
Coord 2000
00164-7024
Discov num
HEI 198
Comp
Coord arcsec 2000
00 16 24.38 -70 23 32.6
Date first
1983
Date last
2017
Obs
8
Pa first
128
Pa last
202
P.A. Now (θ)
198.3°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.09"
Mag pri
7.80
Mag sec
8.26
delta mag (ΔM)
0.46
Spectral class
F8V (yellow-white)
Pri motion ra
-001
Sec motion ra
Pri motion dec
+002
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
201.8
Precise sep
0.081
Constellation
Tucana
SAO
255651
HIP
1309
Tycho2
9137-00628-1
HD
1261
CP
CP-71 4
Distance
193.05
Distance ly
629.73
last precise pa
201.8
last precise sep
0.081
 
 
ORBITAL ELEMENTS
 
 
Period (P)63.3y± 30.8 Periastron (T)2010.7y± 2.7 Semi-major axis (a)0.166a± 0.072
Eccentricity (e)0.42± 0.15 Inclination (i)121.6°± 15 Longitude of periastron (ω)210°± 25.5
Node (Ω)153.2°± 10.6 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.087 44.7
2001 0.087 34.8
2002 0.089 25.2
2003 0.092 16.1
2004 0.095 7.7
2005 0.099 359.8
2006 0.102 352.4
2007 0.103 345.3
2008 0.102 338.2
2009 0.099 330.9
2010 0.093 322.8
2011 0.084 313.3
2012 0.074 301.5
2013 0.065 286.1
2014 0.059 266.5
2015 0.059 244.8
2016 0.065 225.0
2017 0.075 209.6
2018 0.088 198.3
2019 0.102 190.0
2020 0.115 183.7
2021 0.129 178.6
2022 0.141 174.5
2023 0.153 171.1
2024 0.164 168.1
2025 0.174 165.5
2026 0.182 163.1
2027 0.190 161.0
2028 0.198 159.0
2029 0.204 157.2
2030 0.209 155.4

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

grafico orbita





wds00164-7024e.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
00164-7024 HEI 198 1991 3 107 0.1 7.80 8.26 F8V 001624.38-702332.6
00164-7024 HEI 198 2014 4 74 0.1 7.80 8.26 F8V 001624.38-702332.6
00164-7024 HEI 198 2015 5 223 0.1 7.80 8.26 F8V 001624.38-702332.6
00164-7024 HEI 198 2017 8 202 0.1 7.80 8.26 F8V 001624.38-702332.6

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