08444-4428 HDS 1256
08h 44m 23.00s -44° 28' 22.0" P.A. 210.00 sep 0.3 mag 11.08,11.98 Sp M2V: dist. 18.56 pc (60.54 l.y.)
| Coord 2000 |
08444-4428 |
|
Discov num |
HDS1256 |
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Comp |
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Coord arcsec 2000 |
08 44 23.00 -44 28 22.0 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
9 |
|
| Pa first |
280 |
|
Pa last |
210.4 |
|
P.A. Now (θ) |
178.7° |
|
| Sep first |
0.4 |
|
Sep last |
0.284 |
|
Sep. Now (ρ) |
0.219" |
|
| Mag pri |
11.08 |
|
Mag sec |
11.98 |
|
delta mag (ΔM) |
0.9 |
|
Spectral class |
M2V: (red) |
|
| Pri motion ra |
+138 |
|
Sec motion ra |
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| Pri motion dec |
+104 |
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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 |
Vela |
|
HIP |
42881 |
|
Tycho2 |
7687-02128-3 |
|
Gaia DR2 |
5522248290957129088 |
|
| CD |
CD-44 4756 |
|
Distance |
18.56 |
|
Distance ly |
60.54 |
|
ORBITAL ELEMENTS
| Period (P) | 12.695y | ± 0.068 |
Periastron (T) | 2011.75y | ± 0.6 |
Semi-major axis (a) | 0.2902a | ± 0.0359 |
| Eccentricity (e) | 0.536 | ± 0.091 |
Inclination (i) | 146.9° | ± 13.5 |
Longitude of periastron (ω) | 60.3° | ± 29.6 |
| Node (Ω) | 140.5° | ± 21.6 |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
354.1 |
0.180 |
| 2001 |
321.3 |
0.279 |
| 2002 |
303.9 |
0.343 |
| 2003 |
291.0 |
0.379 |
| 2004 |
279.8 |
0.396 |
| 2005 |
269.1 |
0.396 |
| 2006 |
258.1 |
0.383 |
| 2007 |
245.9 |
0.360 |
| 2008 |
231.6 |
0.327 |
| 2009 |
213.5 |
0.286 |
| 2010 |
188.6 |
0.236 |
| 2011 |
148.2 |
0.173 |
| 2012 |
53.6 |
0.117 |
| 2013 |
340.7 |
0.214 |
| 2014 |
315.2 |
0.302 |
| 2015 |
299.7 |
0.356 |
| 2016 |
287.5 |
0.386 |
| 2017 |
276.6 |
0.397 |
| 2018 |
265.8 |
0.393 |
| 2019 |
254.5 |
0.377 |
| 2020 |
241.8 |
0.351 |
| 2021 |
226.6 |
0.315 |
| 2022 |
206.9 |
0.271 |
| 2023 |
178.7 |
0.219 |
| 2024 |
128.3 |
0.149 |
| 2025 |
20.9 |
0.138 |
| 2026 |
330.9 |
0.244 |
| 2027 |
309.9 |
0.321 |
| 2028 |
295.7 |
0.368 |
| 2029 |
284.1 |
0.391 |
| 2030 |
273.3 |
0.398 |
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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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