00310-1005 BU 1158BC

 
 
00h 31m 05.23s -10 05' 01.9" P.A. 114.9 sep 0.17 mag 9.69,9.09 Sp G1V dist. 80 pc (260.96 l.y.)
 
 
Coord 2000
00310-1005
Discov num
BU 1158
Comp
BC
Coord arcsec 2000
00 31 05.23 -10 05 01.9
Date first
1890
Date last
2015
Obs
34
Pa first
138
Pa last
321
P.A. Now (θ)
114.9°
Sep first
0.3
Sep last
0.4
Sep. Now (ρ)
0.17"
Mag pri
9.69
Mag sec
9.09
delta mag (ΔM)
0.6
Spectral class
G1V (yellow)
Pri motion ra
-025
Sec motion ra
Pri motion dec
-037
Sec motion dec
Notes
O W (Orbital solution, )
This double is physical.
 
 
00310-1005 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 147317 00310-1005 HJ 1981 A,BC 1830 2015 27 89 78.4 6.91 8.43 1.52
Show 147318 00310-1005 BU 1158 BC 1890 2015 34 115 0.2 9.69 9.09 0.60 Y <===
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cetus
SAO
147318
HIP
2444
Tycho2
5269-02011-1
HD
2761
ADS
426
BD
BD-10 90
Distance
80
Distance ly
260.96
last precise pa
321.4
last precise sep
0.441
 
 
ORBITAL ELEMENTS
 
 
Period (P)134.66y Periastron (T)2007.39y Semi-major axis (a)0.38a
Eccentricity (e)0.55 Inclination (i)61.4° Longitude of periastron (ω)213.5°
Node (Ω)154.5° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation1984
label rho theta
2000 0.191 316.2
2001 0.191 320.4
2002 0.190 324.7
2003 0.188 329.0
2004 0.183 333.5
2005 0.176 338.2
2006 0.166 343.5
2007 0.155 349.5
2008 0.141 356.5
2009 0.127 5.1
2010 0.114 15.9
2011 0.103 29.2
2012 0.096 44.9
2013 0.097 61.7
2014 0.103 77.3
2015 0.115 90.4
2016 0.131 100.6
2017 0.148 108.6
2018 0.167 114.9
2019 0.186 119.9
2020 0.205 123.9
2021 0.223 127.3
2022 0.242 130.2
2023 0.259 132.6
2024 0.277 134.8
2025 0.293 136.7
2026 0.309 138.4
2027 0.324 139.9
2028 0.339 141.3
2029 0.353 142.6
2030 0.366 143.8

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

grafico orbita





grafico misure orbit6
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
00310-1005 BU 1158 BC 1991 29 263 0.2 9.69 9.09 G1V NO 003105.23-100501.9
00310-1005 BU 1158 BC 2008 31 314 0.3 9.69 9.09 G1V NO 003105.23-100501.9
00310-1005 BU 1158 BC 2011 32 318 0.4 9.69 9.09 G1V NO 003105.23-100501.9
00310-1005 BU 1158 BC 2014 33 321 0.4 9.69 9.09 G1V O 003105.23-100501.9
00310-1005 BU 1158 BC 2015 34 141 0.4 9.69 9.09 G1V O 003105.23-100501.9

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