04220+1932 GHE 6 AB (T Tau)
04h 21m 59.42s +19° 32' 06.5" P.A. 191.00 sep 0.7 mag 5.50,8.10 Sp K0-5 dist. 182.48 pc (595.25 l.y.)
| Coord 2000 |
04220+1932 |
|
Discov num |
GHE 6 |
|
Comp |
AB |
|
Coord arcsec 2000 |
04 21 59.42 +19 32 06.5 |
|
| Date first |
1982 |
|
Date last |
2002 |
|
Obs |
71 |
|
| Pa first |
167 |
|
Pa last |
191.3 |
|
P.A. Now (θ) |
191.3° |
|
| Sep first |
0.6 |
|
Sep last |
0.689 |
|
Sep. Now (ρ) |
0.689" |
|
| Mag pri |
5.50 |
|
Mag sec |
8.10 |
|
delta mag (ΔM) |
2.6 |
|
Spectral class |
K0-5 (yellow-orange) |
|
| Pri motion ra |
+015 |
|
Sec motion ra |
|
|
| Pri motion dec |
-014 |
|
Sec motion dec |
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|
| Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
|
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
04220+1932 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
T Tau |
|
04 21 59 +19 32 06 |
GHE 6 AB |
2002 |
71 |
191 |
0.7 |
5.50 |
8.10 |
2.60 |
Y |
<=== |
| Show |
|
|
04 21 59 +19 32 06 |
GHE 6 A,Ba |
2019 |
66 |
195 |
0.7 |
5.50 |
8.20 |
2.70 |
|
|
| Show |
|
|
04 21 59 +19 32 06 |
GHE 6 A,Bb |
2019 |
50 |
195 |
0.6 |
5.50 |
10.30 |
4.80 |
|
|
| Show |
|
|
04 21 59 +19 32 06 |
NSE 1 AC |
1984 |
1 |
358 |
0.3 |
9.60 |
14.00 |
4.40 |
|
|
| Show |
|
|
04 21 59 +19 32 06 |
CSE 1 AD |
2015 |
3 |
199 |
0.1 |
9.60 |
14.50 |
4.90 |
|
|
| Show |
|
|
04 21 59 +19 32 06 |
KRS 2 Ba,Bb |
2019 |
80 |
20 |
0.1 |
8.20 |
10.30 |
2.10 |
Y |
|
Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
T Tau |
|
Constellation |
Taurus |
|
HIP |
20390 |
|
Tycho2 |
1272-00470-1 |
|
| Gaia DR2 |
48192969034959232 |
|
HD |
284419 |
|
BD |
BD+19 706 |
|
Distance |
182.48 |
|
| Distance ly |
595.25 |
|
ORBITAL ELEMENTS
| Period (P) | 4602.6y | |
Periastron (T) | 33757.32d (1951.3y) | |
Semi-major axis (a) | 3.2551a | |
| Eccentricity (e) | 0.754 | |
Inclination (i) | 54.2° | |
Longitude of periastron (ω) | 10.4° | |
| Node (Ω) | 148.2° | |
Notes | n | |
Reference | Sfr2020 | |
| Equinox | 2000 | |
Last observation | 2019 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
182.2 |
0.699 |
| 2001 |
182.8 |
0.697 |
| 2002 |
183.5 |
0.695 |
| 2003 |
184.2 |
0.693 |
| 2004 |
184.8 |
0.691 |
| 2005 |
185.5 |
0.690 |
| 2006 |
186.2 |
0.688 |
| 2007 |
186.8 |
0.686 |
| 2008 |
187.5 |
0.684 |
| 2009 |
188.2 |
0.683 |
| 2010 |
188.9 |
0.681 |
| 2011 |
189.6 |
0.680 |
| 2012 |
190.3 |
0.678 |
| 2013 |
191.0 |
0.677 |
| 2014 |
191.7 |
0.675 |
| 2015 |
192.4 |
0.674 |
| 2016 |
193.1 |
0.672 |
| 2017 |
193.8 |
0.671 |
| 2018 |
194.5 |
0.670 |
| 2019 |
195.2 |
0.669 |
| 2020 |
195.9 |
0.668 |
| 2021 |
196.6 |
0.667 |
| 2022 |
197.3 |
0.666 |
| 2023 |
198.0 |
0.665 |
| 2024 |
198.8 |
0.664 |
| 2025 |
199.5 |
0.663 |
| 2026 |
200.2 |
0.662 |
| 2027 |
200.9 |
0.661 |
| 2028 |
201.7 |
0.661 |
| 2029 |
202.4 |
0.660 |
| 2030 |
203.1 |
0.660 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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