20210-1447 BLA 7 Aa,Ab

20h 21m 00.67s -14° 46' 53.0" P.A. 35.00 sep 0.1 mag 3.10,4.90 Sp F8V+A0 dist. 100.2 pc (326.85 l.y.)

Coord 2000 20210-1447 Discov num BLA   7 Comp Aa,Ab Coord arcsec 2000 20 21 00.67 -14 46 53.0
Date first 1976 Date last 2021 Obs 15
Pa first 49 Pa last 35.3 P.A. Now (θ) 100.2°
Sep first 0.0 Sep last 0.055 Sep. Now (ρ) 0.009"
Mag pri 3.10 Mag sec 4.90 delta mag (ΔM) 1.8 Spectral class F8V+A0 (yellow-white/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

Common name Dabih Constellation Capricornus SAO 163481 HIP 100345
Tycho2 5753-02281-1 Gaia DR2 6875990375998568192 HD 193495 HR 7776
GC 28295 ADS 13717 BD BD-15 5629 Bayer Beta Capricorni
Bayer name Bet Cap Flamsteed 9 Capricorni Flamsteed name 9 Cap FK5 762
Distance 100.2 Distance ly 326.85 Bayer greek β Cap
Meaning butcher




ORBITAL ELEMENTS

Period (P)3.762y± 0 Periastron (T)2015.64y± 0 Semi-major axis (a)0.0487a± 0.001
Eccentricity (e)0.452± 0.009 Inclination (i)75.1°± 2 Longitude of periastron (ω)124.2°± 1
Node (Ω)43.6°± 1.3 Notesn ReferenceTok2020e
Equinox Last observation Grade2(1=Definitive, 9=Indet.)

label theta rho
2000 47.4 0.044
2001 233.0 0.033
2002 358.6 0.024
2003 33.9 0.056
2004 57.3 0.027
2005 246.8 0.027
2006 14.3 0.033
2007 37.7 0.058
2008 142.4 0.007
2009 271.5 0.019
2010 23.0 0.043
2011 41.5 0.055
2012 217.6 0.026
2013 316.4 0.016
2014 28.7 0.050
2015 46.2 0.047
2016 230.7 0.033
2017 353.8 0.022
2018 33.1 0.056
2019 54.3 0.031
2020 243.5 0.028
2021 11.9 0.031
2022 36.9 0.058
2023 100.2 0.009
2024 265.0 0.020
2025 21.5 0.041
2026 40.7 0.056
2027 213.4 0.023
2028 306.5 0.016
2029 27.7 0.049
2030 45.1 0.049


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



 
 


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