00121-5832 RST4739

 
 
00h 12m 05.19s -58 31' 29.3" P.A. 267.20 sep 0.2 mag 8.44,8.61 Sp G5IV/V dist. 59.38 pc (193.7 l.y.)
 
 
Coord 2000
00121-5832
Discov num
RST4739
Comp
Coord arcsec 2000
00 12 05.19 -58 31 29.3
Date first
1942
Date last
2019
Obs
12
Pa first
283
Pa last
270
P.A. Now (θ)
267.2°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.25"
Mag pri
8.44
Mag sec
8.61
delta mag (ΔM)
0.17
Spectral class
G5IV/V (yellow)
Pri motion ra
+066
Sec motion ra
Pri motion dec
-156
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
269.6
Precise sep
0.256
Constellation
Tucana
SAO
231967
HIP
975
Tycho2
8470-00653-1
HD
791
CP
CP-59 10
Distance
59.38
Distance ly
193.7
last precise pa
269.6
last precise sep
0.256
 
 
ORBITAL ELEMENTS
 
 
Period (P)38.23y Periastron (T)2027.97y Semi-major axis (a)0.226a
Eccentricity (e)0.551 Inclination (i)155.6° Longitude of periastron (ω)275.8°
Node (Ω)50.1° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2018
label rho theta
2000 0.273 349.0
2001 0.283 344.3
2002 0.292 339.9
2003 0.299 335.7
2004 0.305 331.7
2005 0.310 327.8
2006 0.314 324.1
2007 0.317 320.4
2008 0.319 316.8
2009 0.320 313.2
2010 0.319 309.6
2011 0.318 306.0
2012 0.315 302.4
2013 0.312 298.7
2014 0.307 294.9
2015 0.301 290.9
2016 0.294 286.8
2017 0.285 282.4
2018 0.275 277.8
2019 0.263 272.7
2020 0.250 267.2
2021 0.235 261.0
2022 0.218 253.8
2023 0.198 245.3
2024 0.176 234.9
2025 0.151 221.1
2026 0.125 201.8
2027 0.102 172.7
2028 0.093 132.5
2029 0.105 93.6
2030 0.128 66.2

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






wds00121-5832a.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
00121-5832 RST4739 1991 5 259 0.1 8.44 8.61 G5IV/V 001205.19-583129.3
00121-5832 RST4739 2008 7 134 0.3 8.44 8.61 G5IV/V 001205.19-583129.3
00121-5832 RST4739 2015 8 288 0.3 8.44 8.61 G5IV/V 001205.19-583129.3
00121-5832 RST4739 2017 10 279 0.3 8.44 8.61 G5IV/V 001205.19-583129.3
00121-5832 RST4739 2018 11 275 0.3 8.44 8.61 G5IV/V 001205.19-583129.3
00121-5832 RST4739 2019 12 270 0.3 8.44 8.61 G5IV/V O 001205.19-583129.3

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