04153-0739 STF 518 BC

04h 15m 21.79s -07° 39' 29.1" P.A. 330.00 sep 8.2 mag 9.53,11.17 Sp DA2.9+M5V

Coord 2000 04153-0739 Discov num STF 518 Comp BC Coord arcsec 2000 04 15 21.79 -07 39 29.1
Date first 1851 Date last 2019 Obs 184
Pa first 160 Pa last 330.4 P.A. Now (θ) 329.3°
Sep first 3.0 Sep last 8.172 Sep. Now (ρ) 7.938"
Mag pri 9.53 Mag sec 11.17 delta mag (ΔM) 1.64 Spectral class DA2.9+M5V (white dwarf/red)
Pri motion ra -223 Sec motion ra -225
Pri motion dec -338 Sec motion dec -341
Notes N O P (See Notes, Orbital solution, 100-year proper motion)




rPM=0.009 (< 0.3, Physical double)

This double is physical.



04153-0739 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Keid 131063 04 15 16 -07 39 10 STF 518 A,BC 2019 107 102 82.7 4.43 9.31 4.88
Show 131063 04 15 16 -07 39 10 STF 518 AC 2019 8 97 77.5 4.43 11.17 6.74
Show 131063 04 15 16 -07 39 10 STF 518 AD 1998 17 38 481.4 4.43 12.62 8.19
Show 131063 04 15 16 -07 39 10 STF 518 AE 1998 11 24 569.9 4.43 12.99 8.56
Show 04 15 22 -07 39 29 STF 518 BC 2019 184 330 8.2 9.53 11.17 1.64 Y <===
Show 04 15 22 -07 39 29 STF 518 BD 2014 4 28 456.3 9.53 12.62 3.09
Show 04 15 22 -07 39 29 STF 518 BE 2014 4 16 563.4 9.53 12.99 3.46


Quintuple system
6 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Eridanus Tycho2 5313-00183-1 HD 26976 GC 5140
ADS 3093 Bayer Omicron 2 Eridani Bayer name Omi2 Eri Flamsteed 40 Eridani
Flamsteed name 40 Eri Bayer greek ο2 Eri




ORBITAL ELEMENTS

Period (P)233.2y± 0.65 Periastron (T)1848.78888y± 1.28888 Semi-major axis (a)6.88788a± 0.03488
Eccentricity (e)0.4141± 0.0072 Inclination (i)107.98°± 0.36 Longitude of periastron (ω)321.2°± 1.3
Node (Ω)151.58°± 0.2 Notesn ReferenceWSI2021
Equinox Last observation2019 Grade3(1=Definitive, 9=Indet.)

label theta rho
2000 335.8 8.893
2001 335.5 8.883
2002 335.3 8.870
2003 335.0 8.855
2004 334.7 8.837
2005 334.5 8.816
2006 334.2 8.793
2007 333.9 8.766
2008 333.7 8.737
2009 333.4 8.705
2010 333.1 8.670
2011 332.8 8.633
2012 332.6 8.592
2013 332.3 8.548
2014 332.0 8.502
2015 331.7 8.452
2016 331.4 8.399
2017 331.1 8.343
2018 330.8 8.283
2019 330.5 8.221
2020 330.2 8.155
2021 329.9 8.086
2022 329.6 8.014
2023 329.3 7.938
2024 328.9 7.859
2025 328.6 7.776
2026 328.3 7.690
2027 327.9 7.600
2028 327.6 7.507
2029 327.2 7.410
2030 326.8 7.310


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



 
 


wds04153-0739f.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic