00310-1005 BU 1158 BC

 
 
00h 31m 05.23s -10 05' 01.9" P.A. 324.00 sep 0.5 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 2017 Obs 36
Pa first 138 Pa last 323.6 P.A. Now (θ) 323.6°
Sep first 0.3 Sep last 0.465 Sep. Now (ρ) 0.465"
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 (Orbital solution)
This double is physical.
 
 
00310-1005 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 2760 147317 00 30 60 -10 05 05 HJ 1981 A,BC 2015 27 89 78.4 6.91 8.43 1.52
Show 147318 00 31 05 -10 05 02 BU 1158 BC 2017 36 324 0.5 9.69 9.09 0.60 Y <===
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cetus SAO 147318 HIP 2444 Tycho2 5269-02011-1
Gaia DR2 2426456862096115584 HD 2761 GC 610 ADS 426
BD BD-10 90 Distance 80 Distance ly 260.96
 
 
ORBITAL ELEMENTS
 
 
Period (P)423.4y Periastron (T)1939.8y Semi-major axis (a)0.897a
Eccentricity (e)0.359 Inclination (i)74.5° Longitude of periastron (ω)10.2°
Node (Ω)169.8° Notes ReferenceDoc2019a
Equinox2000 Last observation2017 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 298.1 0.263
2001 300.5 0.273
2002 302.7 0.283
2003 304.8 0.294
2004 306.7 0.305
2005 308.4 0.316
2006 310.1 0.327
2007 311.6 0.338
2008 313.1 0.350
2009 314.4 0.361
2010 315.7 0.373
2011 316.9 0.385
2012 318.0 0.396
2013 319.1 0.408
2014 320.1 0.420
2015 321.0 0.432
2016 321.9 0.444
2017 322.7 0.456
2018 323.5 0.468
2019 324.3 0.479
2020 325.0 0.491
2021 325.7 0.503
2022 326.4 0.515
2023 327.0 0.526
2024 327.6 0.538
2025 328.2 0.550
2026 328.7 0.561
2027 329.3 0.573
2028 329.8 0.584
2029 330.3 0.595
2030 330.7 0.606


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



 
 


wds00310-1005b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic