04220+1932 KRS 2 Ba,Bb
04h 21m 59.42s +19° 32' 06.5" P.A. 20.00 sep 0.1 mag 8.20,10.30 Sp G5V:e... dist. 182.48 pc (595.25 l.y.)
| Coord 2000 |
04220+1932 |
|
Discov num |
KRS 2 |
|
Comp |
Ba,Bb |
|
Coord arcsec 2000 |
04 21 59.42 +19 32 06.5 |
|
| Date first |
1983 |
|
Date last |
2019 |
|
Obs |
80 |
|
| Pa first |
46 |
|
Pa last |
20 |
|
P.A. Now (θ) |
20° |
|
| Sep first |
0.1 |
|
Sep last |
0.078 |
|
Sep. Now (ρ) |
0.078" |
|
| Mag pri |
8.20 |
|
Mag sec |
10.30 |
|
delta mag (ΔM) |
2.1 |
|
Spectral class |
G5V:e... (yellow) |
|
| Pri motion ra |
+013 |
|
Sec motion ra |
|
|
| Pri motion dec |
-013 |
|
Sec motion dec |
|
|
| 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) | 27.18y | ± 0.72 |
Periastron (T) | 1996.1y | ± 0.38 |
Semi-major axis (a) | 85.12m | ± 0.62 |
| Eccentricity (e) | 0.551 | ± 0.032 |
Inclination (i) | 21.1° | ± 2.1 |
Longitude of periastron (ω) | 45.8° | ± 16.9 |
| Node (Ω) | 94.4° | ± 16.9 |
Notes | n | |
Reference | Sfr2020 | |
| Equinox | 2000 | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
258.6 |
0.079 |
| 2001 |
269.1 |
0.090 |
| 2002 |
277.4 |
0.100 |
| 2003 |
284.3 |
0.108 |
| 2004 |
290.4 |
0.114 |
| 2005 |
295.9 |
0.119 |
| 2006 |
301.0 |
0.123 |
| 2007 |
305.8 |
0.126 |
| 2008 |
310.5 |
0.127 |
| 2009 |
315.1 |
0.128 |
| 2010 |
319.6 |
0.127 |
| 2011 |
324.3 |
0.126 |
| 2012 |
329.1 |
0.123 |
| 2013 |
334.2 |
0.120 |
| 2014 |
339.6 |
0.115 |
| 2015 |
345.5 |
0.110 |
| 2016 |
352.0 |
0.104 |
| 2017 |
359.5 |
0.096 |
| 2018 |
8.4 |
0.088 |
| 2019 |
19.2 |
0.078 |
| 2020 |
33.1 |
0.068 |
| 2021 |
52.2 |
0.057 |
| 2022 |
80.3 |
0.047 |
| 2023 |
123.3 |
0.038 |
| 2024 |
177.2 |
0.039 |
| 2025 |
217.4 |
0.050 |
| 2026 |
241.2 |
0.064 |
| 2027 |
256.4 |
0.077 |
| 2028 |
267.4 |
0.088 |
| 2029 |
276.0 |
0.098 |
| 2030 |
283.2 |
0.106 |
|
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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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