04215-2055 B 1935 AB
04h 21m 28.80s -20° 54' 54.2" P.A. 5.00 sep 0.1 mag 8.91,10.15 Sp K1V dist. 38.55 pc (125.75 l.y.)
| Coord 2000 |
04215-2055 |
|
Discov num |
B 1935 |
|
Comp |
AB |
|
Coord arcsec 2000 |
04 21 28.80 -20 54 54.2 |
|
| Date first |
1930 |
|
Date last |
2021 |
|
Obs |
17 |
|
| Pa first |
88 |
|
Pa last |
5.2 |
|
P.A. Now (θ) |
309.2° |
|
| Sep first |
0.3 |
|
Sep last |
0.149 |
|
Sep. Now (ρ) |
0.109" |
|
| Mag pri |
8.91 |
|
Mag sec |
10.15 |
|
delta mag (ΔM) |
1.24 |
|
Spectral class |
K1V (yellow-orange) |
|
| Pri motion ra |
+193 |
|
Sec motion ra |
|
|
| Pri motion dec |
+142 |
|
Sec motion dec |
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|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
04215-2055 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
169366 |
04 21 29 -20 54 54 |
B 1935 AB |
2021 |
17 |
5 |
0.1 |
8.91 |
10.15 |
1.24 |
Y |
<=== |
| Show |
HD 27701 |
169366 |
04 21 29 -20 54 54 |
LDS 9168 AC |
2015 |
10 |
326 |
59.3 |
8.91 |
11.29 |
2.38 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Eridanus |
|
SAO |
169366 |
|
HIP |
20342 |
|
Tycho2 |
5896-01671-1 |
|
| Gaia DR2 |
5091491594047857664 |
|
HD |
27701 |
|
BD |
BD-21 848 |
|
Distance |
38.55 |
|
| Distance ly |
125.75 |
|
ORBITAL ELEMENTS
| Period (P) | 21.22y | ± 0.19 |
Periastron (T) | 2002.16y | ± 0.22 |
Semi-major axis (a) | 0.234a | ± 0.006 |
| Eccentricity (e) | 0.505 | ± 0.028 |
Inclination (i) | 155.2° | ± 4.8 |
Longitude of periastron (ω) | 310.9° | ± 20 |
| Node (Ω) | 239.5° | ± 19.1 |
Notes | n | |
Reference | Tok2014a | |
| Equinox | 2000 | |
Last observation | 2013 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
24.2 |
0.173 |
| 2001 |
351.2 |
0.128 |
| 2002 |
295.6 |
0.109 |
| 2003 |
241.8 |
0.129 |
| 2004 |
206.8 |
0.161 |
| 2005 |
183.4 |
0.192 |
| 2006 |
166.3 |
0.222 |
| 2007 |
153.1 |
0.248 |
| 2008 |
142.4 |
0.272 |
| 2009 |
133.2 |
0.292 |
| 2010 |
125.1 |
0.308 |
| 2011 |
117.8 |
0.321 |
| 2012 |
110.9 |
0.330 |
| 2013 |
104.3 |
0.335 |
| 2014 |
97.9 |
0.335 |
| 2015 |
91.3 |
0.331 |
| 2016 |
84.5 |
0.322 |
| 2017 |
77.2 |
0.307 |
| 2018 |
69.0 |
0.287 |
| 2019 |
59.2 |
0.260 |
| 2020 |
46.8 |
0.225 |
| 2021 |
29.3 |
0.183 |
| 2022 |
0.3 |
0.137 |
| 2023 |
309.2 |
0.109 |
| 2024 |
251.9 |
0.123 |
| 2025 |
213.3 |
0.154 |
| 2026 |
187.9 |
0.186 |
| 2027 |
169.7 |
0.215 |
| 2028 |
155.8 |
0.243 |
| 2029 |
144.6 |
0.267 |
| 2030 |
135.1 |
0.288 |
|
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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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