04539-2032 HDS 633
04h 53m 55.55s -20° 32' 20.1" P.A. 149.00 sep 0.2 mag 10.78,11.15 Sp M0V dist. 41.12 pc (134.13 l.y.)
| Coord 2000 |
04539-2032 |
|
Discov num |
HDS 633 |
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Comp |
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Coord arcsec 2000 |
04 53 55.55 -20 32 20.1 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
11 |
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| Pa first |
341 |
|
Pa last |
149.4 |
|
P.A. Now (θ) |
152.4° |
|
| Sep first |
0.2 |
|
Sep last |
0.224 |
|
Sep. Now (ρ) |
0.249" |
|
| Mag pri |
10.78 |
|
Mag sec |
11.15 |
|
delta mag (ΔM) |
0.37 |
|
Spectral class |
M0V (red) |
|
| Pri motion ra |
-033 |
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Sec motion ra |
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| Pri motion dec |
+240 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Eridanus |
|
HIP |
22772 |
|
Tycho2 |
5907-00608-1 |
|
Gaia DR2 |
2974309112120542208 |
|
| GL |
NN 3318 |
|
BD |
BD-20 958 |
|
Distance |
41.12 |
|
Distance ly |
134.13 |
|
ORBITAL ELEMENTS
| Period (P) | 11.834y | ± 0.1 |
Periastron (T) | 2018.19y | ± 0.07 |
Semi-major axis (a) | 0.1429a | ± 0.0042 |
| Eccentricity (e) | 0.913 | ± 0.013 |
Inclination (i) | 56° | ± 3.1 |
Longitude of periastron (ω) | 157.9° | ± 9.1 |
| Node (Ω) | 167.6° | ± 5.4 |
Notes | | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
153.9 |
0.257 |
| 2001 |
156.0 |
0.260 |
| 2002 |
158.1 |
0.253 |
| 2003 |
160.5 |
0.235 |
| 2004 |
163.4 |
0.203 |
| 2005 |
167.9 |
0.151 |
| 2006 |
182.2 |
0.059 |
| 2007 |
126.8 |
0.068 |
| 2008 |
140.9 |
0.140 |
| 2009 |
146.2 |
0.190 |
| 2010 |
149.5 |
0.224 |
| 2011 |
152.0 |
0.246 |
| 2012 |
154.2 |
0.258 |
| 2013 |
156.3 |
0.260 |
| 2014 |
158.5 |
0.251 |
| 2015 |
160.9 |
0.231 |
| 2016 |
164.0 |
0.196 |
| 2017 |
169.1 |
0.139 |
| 2018 |
193.9 |
0.033 |
| 2019 |
131.0 |
0.082 |
| 2020 |
142.0 |
0.150 |
| 2021 |
146.8 |
0.196 |
| 2022 |
149.9 |
0.228 |
| 2023 |
152.4 |
0.249 |
| 2024 |
154.6 |
0.259 |
| 2025 |
156.7 |
0.259 |
| 2026 |
158.9 |
0.249 |
| 2027 |
161.4 |
0.226 |
| 2028 |
164.6 |
0.188 |
| 2029 |
170.4 |
0.127 |
| 2030 |
304.8 |
0.010 |
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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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