00028+0208 BU 281 AB (HD 225028)

 
 
00h 02m 47.14s +02 07' 49.4" P.A. 159.00 sep 1.6 mag 7.40,9.36 Sp F2V dist. 42.63 pc (139.06 l.y.)
 
 
Coord 2000 00028+0208 Discov num BU  281 Comp AB Coord arcsec 2000 00 02 47.14 +02 07 49.4
Date first 1877 Date last 2017 Obs 71
Pa first 217 Pa last 159.4 P.A. Now (θ) 159.4°
Sep first 1.1 Sep last 1.585 Sep. Now (ρ) 1.585"
Mag pri 7.40 Mag sec 9.36 delta mag (ΔM) 1.96 Spectral class F2V (yellow-white)
Pri motion ra +062 Sec motion ra +062
Pri motion dec -094 Sec motion dec -094
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
00028+0208 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 225028 108983 00 02 47 +02 07 49 BU 281 AB 2017 71 159 1.6 7.40 9.36 1.96 Y <===
Show 108983 00 02 47 +02 07 49 HJ 998 AC 2016 20 329 46.3 7.40 12.38 4.98
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 225028 Constellation Pisces SAO 108983 HIP 223
Tycho2 0001-00903-1 Gaia DR2 2739059700184753280 HD 225028 ADS 9
BD BD+01 4820 Distance 42.63 Distance ly 139.06
 
 
ORBITAL ELEMENTS
 
 
Period (P)1117y Periastron (T)2077.5y Semi-major axis (a)3.14a
Eccentricity (e)0.639 Inclination (i)108.5° Longitude of periastron (ω)55.7°
Node (Ω)149.9° Notesn ReferenceLin2015a
Equinox2000 Last observation2014 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 164.9 1.572
2001 164.6 1.573
2002 164.3 1.573
2003 164.0 1.573
2004 163.6 1.573
2005 163.3 1.573
2006 163.0 1.573
2007 162.7 1.572
2008 162.4 1.571
2009 162.1 1.570
2010 161.8 1.569
2011 161.4 1.568
2012 161.1 1.566
2013 160.8 1.564
2014 160.5 1.562
2015 160.2 1.560
2016 159.9 1.558
2017 159.5 1.555
2018 159.2 1.552
2019 158.9 1.549
2020 158.6 1.546
2021 158.2 1.542
2022 157.9 1.538
2023 157.6 1.534
2024 157.3 1.529
2025 156.9 1.524
2026 156.6 1.519
2027 156.2 1.514
2028 155.9 1.508
2029 155.6 1.502
2030 155.2 1.496


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



 
 


wds00028%2B0208a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic