02572-2458 BU 741 AB

02h 57m 14.69s -24° 58' 09.9" P.A. 6.00 sep 0.2 mag 8.06,8.20 Sp K1/2V dist. 22.47 pc (73.3 l.y.)

Coord 2000 02572-2458 Discov num BU  741 Comp AB Coord arcsec 2000 02 57 14.69 -24 58 09.9
Date first 1879 Date last 2020 Obs 82
Pa first 158 Pa last 5.5 P.A. Now (θ) 73.7°
Sep first 0.6 Sep last 0.22 Sep. Now (ρ) 0.089"
Mag pri 8.06 Mag sec 8.20 delta mag (ΔM) 0.14 Spectral class K1/2V (yellow-orange)
Pri motion ra +032 Sec motion ra +032
Pri motion dec -035 Sec motion dec -035
Notes N O (See Notes, Orbital solution)




This double is physical.



02572-2458 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 168181 02 57 15 -24 58 10 BU 741 AB 2020 82 6 0.2 8.06 8.20 0.14 Y <===
Show HD 18455 168181 02 57 15 -24 58 10 S 423 AB,C 2017 36 226 29.2 8.06 7.86 0.20
Show 168180 02 57 13 -24 58 30 BEU 4 Ca,Cb 2020 18 274 0.0 8.24 9.30 1.06 Y
Show 168180 02 57 13 -24 58 30 HDS 379 CD 1991 2 173 5.1 7.86 11.88 4.02


Quintuple system
5 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Fornax SAO 168181 HIP 13772 Tycho2 6437-00958-1
HD 18455 GC 3559 ADS 2242 GL Gl 120.1A
CD CD-25 1169 Distance 22.47 Distance ly 73.3




ORBITAL ELEMENTS

Period (P)151.3y Periastron (T)1870.6y Semi-major axis (a)1.343a
Eccentricity (e)0.54 Inclination (i)81.8° Longitude of periastron (ω)259.7°
Node (Ω)163.2° Notesn ReferenceTok2019h
Equinox2000 Last observation2019 Grade3(1=Definitive, 9=Indet.)

label theta rho
2000 337.1 1.009
2001 337.6 1.012
2002 338.1 1.012
2003 338.6 1.010
2004 339.1 1.005
2005 339.7 0.997
2006 340.2 0.986
2007 340.7 0.971
2008 341.3 0.953
2009 341.9 0.930
2010 342.5 0.903
2011 343.1 0.871
2012 343.8 0.834
2013 344.6 0.791
2014 345.5 0.741
2015 346.5 0.685
2016 347.7 0.623
2017 349.2 0.553
2018 351.2 0.476
2019 353.9 0.394
2020 358.2 0.306
2021 5.9 0.217
2022 24.1 0.133
2023 73.7 0.089
2024 122.2 0.135
2025 139.7 0.220
2026 147.3 0.310
2027 151.5 0.398
2028 154.2 0.483
2029 156.1 0.563
2030 157.5 0.638


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



 
 


wds02572-2458g.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic