12291+3123 STT 251 (HD 108693)

12h 29m 07.72s +31° 23' 25.4" P.A. 55.00 sep 0.7 mag 8.35,9.27 Sp G0 dist. 173.61 pc (566.32 l.y.)

Coord 2000 12291+3123 Discov num STT 251 Comp Coord arcsec 2000 12 29 07.72 +31 23 25.4
Date first 1843 Date last 2018 Obs 84
Pa first 123 Pa last 54.8 P.A. Now (θ) 54.8°
Sep first 0.4 Sep last 0.67 Sep. Now (ρ) 0.67"
Mag pri 8.35 Mag sec 9.27 delta mag (ΔM) 0.92 Spectral class G0 (yellow)
Pri motion ra +148 Sec motion ra +148
Pri motion dec -041 Sec motion dec -041
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 108693 Constellation Canes Venatici SAO 63020 HIP 60920
Tycho2 2528-00473-1 Gaia DR2 4012517224274239360 HD 108693 ADS 8569
BD BD+32 2250 Distance 173.61 Distance ly 566.32




ORBITAL ELEMENTS

Period (P)540.56y Periastron (T)1894.33y Semi-major axis (a)0.553a
Eccentricity (e)0.855 Inclination (i)33.4° Longitude of periastron (ω)96°
Node (Ω)165.1° Notes ReferenceSca2003c
Equinox2000 Last observation1997 Grade5(1=Definitive, 9=Indet.)

label theta rho
2000 58.2 0.636
2001 58.4 0.639
2002 58.6 0.641
2003 58.8 0.644
2004 59.0 0.647
2005 59.2 0.650
2006 59.4 0.653
2007 59.6 0.655
2008 59.9 0.658
2009 60.1 0.661
2010 60.3 0.663
2011 60.5 0.666
2012 60.7 0.669
2013 60.8 0.671
2014 61.0 0.674
2015 61.2 0.676
2016 61.4 0.679
2017 61.6 0.681
2018 61.8 0.684
2019 62.0 0.686
2020 62.2 0.689
2021 62.4 0.691
2022 62.6 0.694
2023 62.7 0.696
2024 62.9 0.698
2025 63.1 0.701
2026 63.3 0.703
2027 63.5 0.705
2028 63.6 0.708
2029 63.8 0.710
2030 64.0 0.712


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



 
 


wds12291%2B3123a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic