12179-5559 BYV 1
12h 17m 53.19s -55° 58' 31.8" P.A. 307.00 sep 7.1 mag 7.81,13.00 Sp F5V+L2.5 dist. 92.08 pc (300.36 l.y.)
Coord 2000 |
12179-5559 |
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Discov num |
BYV 1 |
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Comp |
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Coord arcsec 2000 |
12 17 53.19 -55 58 31.8 |
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Date first |
2004 |
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Date last |
2018 |
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Obs |
12 |
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Pa first |
307 |
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Pa last |
307.3 |
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P.A. Now (θ) |
307.3° |
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Sep first |
7.1 |
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Sep last |
7.113 |
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Sep. Now (ρ) |
7.113" |
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Mag pri |
7.81 |
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Mag sec |
13.00 |
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delta mag (ΔM) |
5.19 |
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Spectral class |
F5V+L2.5 (yellow-white/very deep red) |
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Pri motion ra |
-039 |
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Sec motion ra |
-039 |
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Pri motion dec |
-012 |
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Sec motion dec |
-012 |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Crux |
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SAO |
239819 |
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HIP |
59960 |
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Tycho2 |
8637-02434-1 |
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Gaia DR2 |
6072902994276659200 |
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HD |
106906 |
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CP |
CP-55 4978 |
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Distance |
92.08 |
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Distance ly |
300.36 |
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ORBITAL ELEMENTS
Period (P) | 15000y | ± 17000 |
Periastron (T) | 3200y | ± 7800 |
Semi-major axis (a) | 8225.45m | ± 5419.12 |
Eccentricity (e) | 0.44 | ± 0.31 |
Inclination (i) | 56° | ± 21 |
Longitude of periastron (ω) | 356° | ± 86 |
Node (Ω) | 99° | ± 28 |
Notes | n | |
Reference | Ngu2021 | |
Equinox | | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
35.8 |
3.481 |
2001 |
35.9 |
3.481 |
2002 |
36.0 |
3.482 |
2003 |
36.0 |
3.482 |
2004 |
36.1 |
3.482 |
2005 |
36.2 |
3.483 |
2006 |
36.2 |
3.483 |
2007 |
36.3 |
3.484 |
2008 |
36.4 |
3.484 |
2009 |
36.4 |
3.484 |
2010 |
36.5 |
3.485 |
2011 |
36.6 |
3.485 |
2012 |
36.6 |
3.486 |
2013 |
36.7 |
3.486 |
2014 |
36.8 |
3.486 |
2015 |
36.8 |
3.487 |
2016 |
36.9 |
3.487 |
2017 |
37.0 |
3.488 |
2018 |
37.0 |
3.488 |
2019 |
37.1 |
3.488 |
2020 |
37.2 |
3.489 |
2021 |
37.2 |
3.489 |
2022 |
37.3 |
3.490 |
2023 |
37.4 |
3.490 |
2024 |
37.4 |
3.491 |
2025 |
37.5 |
3.491 |
2026 |
37.6 |
3.491 |
2027 |
37.6 |
3.492 |
2028 |
37.7 |
3.492 |
2029 |
37.8 |
3.493 |
2030 |
37.8 |
3.493 |
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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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