20393-1457 HU 200 AB (Tau Cap)
20h 39m 16.32s -14° 57' 17.0" P.A. 123.00 sep 0.4 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) |
123° |
|
| Sep first |
0.2 |
|
Sep last |
0.367 |
|
Sep. Now (ρ) |
0.367" |
|
| 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 |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Tau Cap |
163771 |
20 39 16 -14 57 17 |
HU 200 AB |
2019 |
96 |
123 |
0.4 |
5.38 |
7.31 |
1.93 |
Y |
<=== |
| Show |
|
163771 |
20 39 16 -14 57 17 |
HU 200 AC |
2000 |
7 |
272 |
159.2 |
5.38 |
12.20 |
6.82 |
|
|
| Show |
|
163771 |
20 39 16 -14 57 17 |
OCC 226 Ba,Bb |
1974 |
0 |
-1 |
0.1 |
5.80 |
9.30 |
3.50 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| 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 |
|
Bayer greek |
τ Cap |
|
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° | |
Notes | n | |
Reference | Hei1998 | |
| Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
117.2 |
0.334 |
| 2001 |
117.5 |
0.333 |
| 2002 |
117.8 |
0.332 |
| 2003 |
118.1 |
0.332 |
| 2004 |
118.4 |
0.331 |
| 2005 |
118.7 |
0.330 |
| 2006 |
119.1 |
0.329 |
| 2007 |
119.4 |
0.328 |
| 2008 |
119.7 |
0.327 |
| 2009 |
120.0 |
0.326 |
| 2010 |
120.4 |
0.325 |
| 2011 |
120.7 |
0.324 |
| 2012 |
121.0 |
0.323 |
| 2013 |
121.4 |
0.322 |
| 2014 |
121.7 |
0.321 |
| 2015 |
122.0 |
0.320 |
| 2016 |
122.4 |
0.319 |
| 2017 |
122.7 |
0.318 |
| 2018 |
123.1 |
0.317 |
| 2019 |
123.4 |
0.316 |
| 2020 |
123.8 |
0.315 |
| 2021 |
124.1 |
0.314 |
| 2022 |
124.5 |
0.312 |
| 2023 |
124.8 |
0.311 |
| 2024 |
125.2 |
0.310 |
| 2025 |
125.6 |
0.309 |
| 2026 |
125.9 |
0.308 |
| 2027 |
126.3 |
0.307 |
| 2028 |
126.7 |
0.305 |
| 2029 |
127.1 |
0.304 |
| 2030 |
127.4 |
0.303 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
