09149+0427 HEI 350 (HD 79555)
09h 14m 53.72s +04° 26' 34.4" P.A. 323.00 sep 0.4 mag 8.00,11.00 Sp K4V dist. 17.96 pc (58.59 l.y.)
| Coord 2000 |
09149+0427 |
|
Discov num |
HEI 350 |
|
Comp |
|
|
Coord arcsec 2000 |
09 14 53.72 +04 26 34.4 |
|
| Date first |
1987 |
|
Date last |
2023 |
|
Obs |
39 |
|
| Pa first |
7 |
|
Pa last |
322.6 |
|
P.A. Now (θ) |
348.7° |
|
| Sep first |
0.7 |
|
Sep last |
0.363 |
|
Sep. Now (ρ) |
0.547" |
|
| Mag pri |
8.00 |
|
Mag sec |
11.00 |
|
delta mag (ΔM) |
3 |
|
Spectral class |
K4V (yellow-orange) |
|
| Pri motion ra |
-102 |
|
Sec motion ra |
|
|
| Pri motion dec |
+020 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 79555 |
|
Constellation |
Hydra |
|
SAO |
117534 |
|
HIP |
45383 |
|
| Tycho2 |
0230-00407-1 |
|
Gaia DR2 |
579567598502090240 |
|
HD |
79555 |
|
BD |
BD+05 2143 |
|
| Distance |
17.96 |
|
Distance ly |
58.59 |
|
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 |
| 2031 |
307.4 |
0.791 |
| 2032 |
303.2 |
0.794 |
| 2033 |
298.9 |
0.794 |
| 2034 |
294.7 |
0.790 |
| 2035 |
290.4 |
0.784 |
| 2036 |
286.0 |
0.773 |
| 2037 |
281.5 |
0.758 |
| 2038 |
276.8 |
0.738 |
| 2039 |
271.7 |
0.715 |
| 2040 |
266.3 |
0.687 |
| 2041 |
260.4 |
0.656 |
| 2042 |
253.9 |
0.621 |
| 2043 |
246.6 |
0.586 |
| 2044 |
238.4 |
0.551 |
| 2045 |
229.1 |
0.519 |
| 2046 |
218.7 |
0.492 |
| 2047 |
207.3 |
0.474 |
| 2048 |
195.2 |
0.467 |
| 2049 |
183.1 |
0.471 |
| 2050 |
171.5 |
0.487 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
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 |
| 2031 |
159.8 |
0.793 |
| 2032 |
155.9 |
0.851 |
| 2033 |
152.5 |
0.899 |
| 2034 |
149.3 |
0.938 |
| 2035 |
146.4 |
0.969 |
| 2036 |
143.7 |
0.995 |
| 2037 |
141.0 |
1.014 |
| 2038 |
138.5 |
1.029 |
| 2039 |
136.0 |
1.039 |
| 2040 |
133.6 |
1.046 |
| 2041 |
131.1 |
1.049 |
| 2042 |
128.7 |
1.049 |
| 2043 |
126.3 |
1.046 |
| 2044 |
123.9 |
1.041 |
| 2045 |
121.4 |
1.034 |
| 2046 |
118.9 |
1.025 |
| 2047 |
116.4 |
1.015 |
| 2048 |
113.8 |
1.003 |
| 2049 |
111.1 |
0.990 |
| 2050 |
108.4 |
0.976 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
