12272+2701 STF 1643 AB (HD 108421)

12h 27m 13.72s +27° 01' 29.6" P.A. 3.00 sep 2.8 mag 9.03,9.45 Sp K2 dist. 27.21 pc (88.76 l.y.)

Coord 2000 12272+2701 Discov num STF1643 Comp AB Coord arcsec 2000 12 27 13.72 +27 01 29.6
Date first 1830 Date last 2020 Obs 253
Pa first 71 Pa last 3.1 P.A. Now (θ) 3.1°
Sep first 2.0 Sep last 2.76 Sep. Now (ρ) 2.76"
Mag pri 9.03 Mag sec 9.45 delta mag (ΔM) 0.42 Spectral class K2 (yellow-orange)
Pri motion ra +094 Sec motion ra +084
Pri motion dec -248 Sec motion dec -242
Notes N O V (See Notes, Orbital solution, Proper motion indicates physical)




rPM=0.044 (< 0.3, Physical double)

This double is physical.



12272+2701 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 108421 82315 12 27 14 +27 01 30 STF 1643 AB 2020 253 3 2.8 9.03 9.45 0.42 Y <===
Show 82315 12 27 14 +27 01 30 LEP 54 AC 2015 4 261 221.4 9.03 14.78 5.75


Triple system
3 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Name HD 108421 Constellation Coma Berenices SAO 82315 HIP 60759
Tycho2 1991-00865-1 Gaia DR2 4008897567571892480 HD 108421 GC 16971
ADS 8553 GL NN 3725A BD BD+27 2135 Distance 27.21
Distance ly 88.76




ORBITAL ELEMENTS

Period (P)549.41y Periastron (T)2193.49y Semi-major axis (a)2.695a
Eccentricity (e)0.58 Inclination (i)115.2° Longitude of periastron (ω)286.1°
Node (Ω)155.3° Notesn ReferenceOle2003b
Equinox2000 Last observation2000 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 7.3 2.645
2001 7.1 2.650
2002 6.8 2.655
2003 6.6 2.660
2004 6.4 2.665
2005 6.1 2.670
2006 5.9 2.675
2007 5.7 2.680
2008 5.5 2.684
2009 5.2 2.689
2010 5.0 2.694
2011 4.8 2.698
2012 4.5 2.702
2013 4.3 2.707
2014 4.1 2.711
2015 3.9 2.715
2016 3.7 2.719
2017 3.4 2.723
2018 3.2 2.727
2019 3.0 2.731
2020 2.8 2.735
2021 2.5 2.739
2022 2.3 2.742
2023 2.1 2.746
2024 1.9 2.749
2025 1.7 2.753
2026 1.4 2.756
2027 1.2 2.759
2028 1.0 2.762
2029 0.8 2.765
2030 0.6 2.768


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



 
 


wds12272%2B2701b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic