20393-1457 HU  200AB (Tau Cap)

 
 
20h 39m 16.32s -14 57' 17.0" P.A. 124.10 sep 0.3 mag 5.38,7.31 Sp B5III dist. 348.43 pc (1136.58 l.y.)
 
 
Coord 2000
20393-1457
Discov num
HU  200
Comp
AB
Coord arcsec 2000
20 39 16.32 -14 57 17.0
Date first
1900
Date last
2019
Obs
96
Pa first
270
Pa last
123
P.A. Now (θ)
124.1°
Sep first
0.2
Sep last
0.4
Sep. Now (ρ)
0.31"
Mag pri
5.38
Mag sec
7.31
delta mag (ΔM)
1.93
Spectral class
B5III (blue-white)
Pri motion ra
+002
Sec motion ra
+002
Pri motion dec
-021
Sec motion dec
-021
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
20393-1457 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Tau Cap 163771 20393-1457 HU 200 AB 1900 2019 96 124 0.3 5.38 7.31 1.93 Y <===
Show 163771 20393-1457 HU 200 AC 1905 2000 7 272 159.2 5.38 12.20 6.82
Show 163771 20393-1457 OCC 226 Ba,Bb 1940 1974 0 0.1 5.80 9.30 3.50
Quadruple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
123
Precise sep
0.367
Name
Tau Cap
Constellation
Capricornus
SAO
163771
HIP
101923
Tycho2
5767-02439-1
Gaia DR2
6863409385992156800
HD
196662
HR
7889
GC
28748
ADS
14099
BD
BD-15 5743
Bayer
Tau Capricorni
Bayer name
Tau Cap
Flamsteed
14 Capricorni
Flamsteed name
14 Cap
Distance
348.43
Distance ly
1136.58
last precise pa
123
last precise sep
0.367
 
 
ORBITAL ELEMENTS
 
 
Period (P)420y Periastron (T)1915y Semi-major axis (a)0.48a
Eccentricity (e)0.73 Inclination (i)75° Longitude of periastron (ω)270°
Node (Ω)93° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.334 117.2
2001 0.333 117.5
2002 0.332 117.8
2003 0.332 118.1
2004 0.331 118.4
2005 0.330 118.7
2006 0.329 119.1
2007 0.328 119.4
2008 0.327 119.7
2009 0.326 120.0
2010 0.325 120.4
2011 0.324 120.7
2012 0.323 121.0
2013 0.322 121.4
2014 0.321 121.7
2015 0.320 122.0
2016 0.319 122.4
2017 0.318 122.7
2018 0.317 123.1
2019 0.316 123.4
2020 0.315 123.8
2021 0.314 124.1
2022 0.312 124.5
2023 0.311 124.8
2024 0.310 125.2
2025 0.309 125.6
2026 0.308 125.9
2027 0.307 126.3
2028 0.305 126.7
2029 0.304 127.1
2030 0.303 127.4


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



 
 


wds20393-1457a.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
20393-1457 HU 200 AB 2005 85 123 0.3 5.38 7.31 B5III NOD 203916.32-145717.0
20393-1457 HU 200 AB 2008 88 118 0.3 5.38 7.31 B5III NOD 203916.32-145717.0
20393-1457 HU 200 AB 2009 90 118 0.3 5.38 7.31 B5III NOD 203916.32-145717.0
20393-1457 HU 200 AB 2013 92 121 0.3 5.38 7.31 B5III NO 203916.32-145717.0
20393-1457 HU 200 AB 2017 93 120 0.3 5.38 7.31 B5III NO 203916.32-145717.0
20393-1457 HU 200 AB 2018 95 121 0.3 5.38 7.31 B5III NO 203916.32-145717.0

If you need more information about this double, apply for a data request form to the WDS.