20210-1447 BAR  12Ba,Bb

 
 
20h 20m 46.55s -14 47' 05.5" P.A. 55.3 sep 0.48 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
2018
Obs
24
Pa first
106
Pa last
56
P.A. Now (θ)
55.3°
Sep first
0.9
Sep last
0.5
Sep. Now (ρ)
0.48"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 163481 20210-1447 BLA 7 Aa,Ab 1976 2018 11 60 0.0 3.10 4.90 1.80 Y
Show Dabih 163481 20210-1447 STFA 52 AB 1800 2012 41 267 205.4 3.15 6.08 2.93
Show 20210-1447 STFA 52 AC 1905 2012 11 133 226.1 3.15 8.83 5.68
Show 20210-1447 HJ 2948 AD 1891 2000 3 292 115.9 3.15 12.96 9.81
Show 163471 20210-1447 BAR 12 Ba,Bb 1884 2018 24 55 0.5 6.16 9.14 2.98 Y <===
Show 163471 20210-1447 STFA 52 BC 1895 2015 14 111 396.5 6.08 8.83 2.75
Show 20210-1447 HJ 2948 DE 1823 2000 8 321 3.9 13.70 14.40 0.70
Septuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
55.9
Precise sep
0.463
Constellation
Capricornus
SAO
163471
HIP
100325
Tycho2
5753-02282-1
Gaia DR2
91389558400
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
last precise pa
55.9
last precise sep
0.463
 
 
ORBITAL ELEMENTS
 
 
Period (P)538.62y Periastron (T)2073.19y Semi-major axis (a)0.943a
Eccentricity (e)0.07 Inclination (i)112.6° Longitude of periastron (ω)107.7°
Node (Ω)96.6° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.616 70.1
2001 0.608 69.5
2002 0.601 68.9
2003 0.593 68.2
2004 0.586 67.6
2005 0.578 66.9
2006 0.571 66.2
2007 0.564 65.5
2008 0.556 64.8
2009 0.549 64.0
2010 0.541 63.3
2011 0.534 62.5
2012 0.526 61.7
2013 0.519 60.8
2014 0.512 60.0
2015 0.504 59.1
2016 0.497 58.2
2017 0.490 57.2
2018 0.483 56.3
2019 0.475 55.3
2020 0.468 54.3
2021 0.461 53.2
2022 0.455 52.1
2023 0.448 51.0
2024 0.441 49.8
2025 0.435 48.7
2026 0.428 47.4
2027 0.422 46.2
2028 0.416 44.9
2029 0.410 43.5
2030 0.404 42.2

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






wds20210-1447a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20210-1447 BAR 12 Ba,Bb 1991 18 75 0.7 6.16 9.14 A0III N 202046.52-144705.6
20210-1447 BAR 12 Ba,Bb 2008 19 64 0.5 6.16 9.14 A0III N 202046.52-144705.6
20210-1447 BAR 12 Ba,Bb 2015 20 59 0.5 6.16 9.14 A0III NO 202046.55-144705.5
20210-1447 BAR 12 Ba,Bb 2017 23 57 0.5 6.16 9.14 A0III NO 202046.55-144705.5

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