20210-1447 BAR 12 Ba,Bb

 
 
20h 20m 46.55s -14° 47' 05.5" P.A. 52.00 sep 0.4 mag 6.16,9.14 Sp A0III dist. 104.06 pc (339.44 l.y.)
 
 
Coord 2000 20210-1447 Discov num BAR  12 Comp Ba,Bb Coord arcsec 2000 20 20 46.55 -14 47 05.5
Date first 1884 Date last 2021 Obs 30
Pa first 106 Pa last 52.1 P.A. Now (θ) 52.1°
Sep first 0.9 Sep last 0.431 Sep. Now (ρ) 0.431"
Mag pri 6.16 Mag sec 9.14 delta mag (ΔM) 2.98 Spectral class A0III (white)
Pri motion ra +042 Sec motion ra
Pri motion dec +002 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20210-1447 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 163481 20 21 01 -14 46 53 BLA 7 Aa,Ab 2021 15 35 0.1 3.10 4.90 1.80 Y
Show Dabih 163481 20 21 01 -14 46 53 STFA 52 AB 2016 42 266 205.2 3.15 6.08 2.93
Show 163481 20 21 01 -14 46 53 STFA 52 AC 2012 11 133 226.1 3.15 8.83 5.68
Show 163481 20 21 01 -14 46 53 HJ 2948 AD 2000 3 292 115.9 3.15 12.96 9.81
Show 163471 20 20 47 -14 47 06 BAR 12 Ba,Bb 2021 30 52 0.4 6.16 9.14 2.98 Y <===
Show 163471 20 20 47 -14 47 06 STFA 52 BC 2015 14 111 396.5 6.08 8.83 2.75
Show 20 20 53 -14 46 09 HJ 2948 DE 2000 8 321 3.9 13.70 14.40 0.70
Septuple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Capricornus SAO 163471 HIP 100325 Tycho2 5753-02282-1
Gaia DR2 6875990891389558400 HD 193452 HR 7775 GC 28286
ADS 13717 BD BD-15 5626 Bayer Beta 2 Capricorni Bayer name Bet2 Cap
Distance 104.06 Distance ly 339.44 Bayer greek β2 Cap
 
 
ORBITAL ELEMENTS
 
 
Period (P)400y Periastron (T)2065y Semi-major axis (a)0.689a
Eccentricity (e)0.458 Inclination (i)125.2° Longitude of periastron (ω)137.1°
Node (Ω)84.7° Notesn ReferenceTok2021c
Equinox2000 Last observation2021 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 69.8 0.620
2001 69.3 0.612
2002 68.7 0.604
2003 68.1 0.597
2004 67.4 0.589
2005 66.8 0.581
2006 66.1 0.572
2007 65.5 0.564
2008 64.8 0.556
2009 64.0 0.547
2010 63.3 0.539
2011 62.5 0.530
2012 61.7 0.521
2013 60.9 0.512
2014 60.1 0.503
2015 59.2 0.494
2016 58.3 0.485
2017 57.3 0.476
2018 56.3 0.466
2019 55.3 0.457
2020 54.2 0.448
2021 53.1 0.438
2022 52.0 0.429
2023 50.7 0.419
2024 49.5 0.409
2025 48.1 0.400
2026 46.7 0.390
2027 45.2 0.381
2028 43.7 0.371
2029 42.1 0.362
2030 40.3 0.352


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



 
 


wds20210-1447e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic