09149+0427 HEI 350 (HD 79555)
09h 14m 53.72s +04° 26' 34.4" P.A. 349.00 sep 0.5 mag 8.00,11.00 Sp K4V dist. 17.96 pc (58.59 l.y.)
Coord 2000 |
09149+0427 |
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Discov num |
HEI 350 |
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Comp |
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Coord arcsec 2000 |
09 14 53.72 +04 26 34.4 |
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Date first |
1987 |
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Date last |
2021 |
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Obs |
36 |
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Pa first |
7 |
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Pa last |
348.7 |
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P.A. Now (θ) |
348.7° |
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Sep first |
0.7 |
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Sep last |
0.547 |
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Sep. Now (ρ) |
0.547" |
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Mag pri |
8.00 |
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Mag sec |
11.00 |
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delta mag (ΔM) |
3 |
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Spectral class |
K4V (yellow-orange) |
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Pri motion ra |
-102 |
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Sec motion ra |
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Pri motion dec |
+020 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 79555 |
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Constellation |
Hydra |
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SAO |
117534 |
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HIP |
45383 |
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Tycho2 |
0230-00407-1 |
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Gaia DR2 |
579567598502090240 |
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HD |
79555 |
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GL |
Gl 339A |
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BD |
BD+05 2143 |
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Distance |
17.96 |
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Distance ly |
58.59 |
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ORBITAL ELEMENTS SOLUTION #1
Period (P) | 62.68y | ± 2.88 |
Periastron (T) | 1984.83y | ± 1.6 |
Semi-major axis (a) | 0.81a | ± 0.037 |
Eccentricity (e) | 0.2 | |
Inclination (i) | 136° | ± 3 |
Longitude of periastron (ω) | 263.6° | ± 10.6 |
Node (Ω) | 102.3° | ± 2.1 |
Notes | n | |
Reference | Tok2016e | |
Equinox | 2000 | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
92.6 |
0.823 |
2001 |
88.7 |
0.828 |
2002 |
84.9 |
0.830 |
2003 |
81.0 |
0.828 |
2004 |
77.1 |
0.824 |
2005 |
73.2 |
0.818 |
2006 |
69.2 |
0.809 |
2007 |
65.1 |
0.799 |
2008 |
60.9 |
0.788 |
2009 |
56.5 |
0.776 |
2010 |
52.0 |
0.763 |
2011 |
47.4 |
0.751 |
2012 |
42.6 |
0.739 |
2013 |
37.7 |
0.728 |
2014 |
32.6 |
0.718 |
2015 |
27.4 |
0.710 |
2016 |
22.1 |
0.704 |
2017 |
16.7 |
0.700 |
2018 |
11.2 |
0.698 |
2019 |
5.8 |
0.698 |
2020 |
0.4 |
0.701 |
2021 |
355.0 |
0.705 |
2022 |
349.7 |
0.711 |
2023 |
344.5 |
0.719 |
2024 |
339.4 |
0.728 |
2025 |
334.5 |
0.738 |
2026 |
329.7 |
0.749 |
2027 |
325.0 |
0.759 |
2028 |
320.4 |
0.769 |
2029 |
316.0 |
0.778 |
2030 |
311.7 |
0.785 |
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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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ORBITAL ELEMENTS SOLUTION #2
Period (P) | 55.37y | |
Periastron (T) | 1969.13y | |
Semi-major axis (a) | 0.937a | |
Eccentricity (e) | 0.6 | |
Inclination (i) | 125.5° | |
Longitude of periastron (ω) | 72.8° | |
Node (Ω) | 344° | |
Notes | n | |
Reference | Tok2020g | |
Equinox | 2000 | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
92.0 |
0.891 |
2001 |
88.6 |
0.875 |
2002 |
85.1 |
0.859 |
2003 |
81.4 |
0.844 |
2004 |
77.6 |
0.829 |
2005 |
73.7 |
0.815 |
2006 |
69.6 |
0.802 |
2007 |
65.4 |
0.789 |
2008 |
61.1 |
0.778 |
2009 |
56.7 |
0.768 |
2010 |
52.1 |
0.758 |
2011 |
47.4 |
0.749 |
2012 |
42.7 |
0.741 |
2013 |
37.8 |
0.733 |
2014 |
32.8 |
0.724 |
2015 |
27.7 |
0.715 |
2016 |
22.4 |
0.704 |
2017 |
17.0 |
0.690 |
2018 |
11.2 |
0.671 |
2019 |
5.1 |
0.645 |
2020 |
358.4 |
0.608 |
2021 |
350.6 |
0.557 |
2022 |
340.9 |
0.486 |
2023 |
327.0 |
0.390 |
2024 |
302.5 |
0.279 |
2025 |
255.9 |
0.221 |
2026 |
211.7 |
0.292 |
2027 |
189.8 |
0.416 |
2028 |
178.0 |
0.535 |
2029 |
170.2 |
0.637 |
2030 |
164.5 |
0.722 |
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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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