02442+4914 STF 296 AB (The Per)

 
 
02h 44m 11.99s +49° 13' 42.4" P.A. 306.00 sep 21.2 mag 4.16,10.00 Sp F7V+M1.5 dist. 11.13 pc (36.31 l.y.)
 
 
Coord 2000 02442+4914 Discov num STF 296 Comp AB Coord arcsec 2000 02 44 11.99 +49 13 42.4
Date first 1782 Date last 2020 Obs 85
Pa first 290 Pa last 306.1 P.A. Now (θ) 306.1°
Sep first 13.5 Sep last 21.15 Sep. Now (ρ) 21.15"
Mag pri 4.16 Mag sec 10.00 delta mag (ΔM) 5.84 Spectral class F7V+M1.5 (yellow-white/red)
Pri motion ra +335 Sec motion ra +336
Pri motion dec -090 Sec motion dec -084
Notes N O V (See Notes, Orbital solution, Proper motion indicates physical)
rPM=0.018 (< 0.3, Physical double)
This double is physical.
 
 
02442+4914 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show The Per 38288 02 44 12 +49 13 42 STF 296 AB 2020 85 306 21.2 4.16 10.00 5.84 Y <===
Show 38288 02 44 12 +49 13 42 STF 296 AC 2002 17 244 94.8 4.16 11.08 6.92
Show 02 44 10 +49 13 54 STF 296 BC 2007 13 232 88.2 10.00 11.08 1.08
Show 02 44 10 +49 13 54 TNN 4 BD 2004 1 161 6.2 5.87 17.70 11.83
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name The Per Var name NSV902 Per Constellation Perseus SAO 38288
HIP 12777 Tycho2 3304-02737-1 HD 16895 HR 799
GC 3277 ADS 2081 GL Gl 107A BD BD+48 746
Bayer Theta Persei Bayer name The Per Flamsteed 13 Persei Flamsteed name 13 Per
FK5 93 Distance 11.13 Distance ly 36.31 Bayer greek θ Per
 
 
ORBITAL ELEMENTS
 
 
Period (P)2720y Periastron (T)1613y Semi-major axis (a)22.289a
Eccentricity (e)0.13 Inclination (i)75.44° Longitude of periastron (ω)100.64°
Node (Ω)128° Notesn ReferenceKSC2017
Equinox2000 Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 304.1 20.042
2001 304.1 20.062
2002 304.1 20.081
2003 304.2 20.100
2004 304.2 20.119
2005 304.3 20.138
2006 304.3 20.157
2007 304.3 20.175
2008 304.4 20.194
2009 304.4 20.212
2010 304.5 20.230
2011 304.5 20.249
2012 304.5 20.267
2013 304.6 20.284
2014 304.6 20.302
2015 304.7 20.320
2016 304.7 20.337
2017 304.7 20.355
2018 304.8 20.372
2019 304.8 20.389
2020 304.9 20.406
2021 304.9 20.423
2022 304.9 20.440
2023 305.0 20.457
2024 305.0 20.473
2025 305.1 20.490
2026 305.1 20.506
2027 305.1 20.522
2028 305.2 20.538
2029 305.2 20.554
2030 305.3 20.570


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


 
  


wds02442%2B4914b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic