11191-3100 I 506 (HD 98415)
11h 19m 04.62s -31° 00' 22.3" P.A. 173.00 sep 0.8 mag 8.24,9.37 Sp G2/3V dist. 93.63 pc (305.42 l.y.)
Coord 2000 |
11191-3100 |
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Discov num |
I 506 |
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Comp |
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Coord arcsec 2000 |
11 19 04.62 -31 00 22.3 |
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Date first |
1909 |
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Date last |
2016 |
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Obs |
27 |
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Pa first |
100 |
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Pa last |
172.6 |
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P.A. Now (θ) |
172.6° |
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Sep first |
1.0 |
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Sep last |
0.794 |
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Sep. Now (ρ) |
0.794" |
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Mag pri |
8.24 |
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Mag sec |
9.37 |
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delta mag (ΔM) |
1.13 |
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Spectral class |
G2/3V (yellow) |
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Pri motion ra |
-077 |
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Sec motion ra |
-077 |
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Pri motion dec |
+071 |
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Sec motion dec |
+071 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 98415 |
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Constellation |
Hydra |
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SAO |
202316 |
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HIP |
55258 |
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Tycho2 |
7202-00516-1 |
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Gaia DR2 |
5404014958061662720 |
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HD |
98415 |
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CD |
CD-30 9107 |
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CP |
CP-30 3311 |
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Distance |
93.63 |
|
Distance ly |
305.42 |
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ORBITAL ELEMENTS
Period (P) | 585y | |
Periastron (T) | 2460y | |
Semi-major axis (a) | 1.94a | |
Eccentricity (e) | 0.634 | |
Inclination (i) | 71.3° | |
Longitude of periastron (ω) | 301.3° | |
Node (Ω) | 87.6° | |
Notes | | |
Reference | USN2002 | |
Equinox | 2000 | |
Last observation | 1991 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
162.9 |
0.786 |
2001 |
163.8 |
0.786 |
2002 |
164.7 |
0.787 |
2003 |
165.6 |
0.787 |
2004 |
166.6 |
0.788 |
2005 |
167.5 |
0.789 |
2006 |
168.4 |
0.790 |
2007 |
169.3 |
0.792 |
2008 |
170.2 |
0.793 |
2009 |
171.2 |
0.795 |
2010 |
172.1 |
0.797 |
2011 |
173.0 |
0.799 |
2012 |
173.9 |
0.801 |
2013 |
174.8 |
0.803 |
2014 |
175.6 |
0.806 |
2015 |
176.5 |
0.808 |
2016 |
177.4 |
0.811 |
2017 |
178.3 |
0.814 |
2018 |
179.1 |
0.817 |
2019 |
180.0 |
0.820 |
2020 |
180.8 |
0.823 |
2021 |
181.7 |
0.827 |
2022 |
182.5 |
0.830 |
2023 |
183.4 |
0.834 |
2024 |
184.2 |
0.838 |
2025 |
185.0 |
0.842 |
2026 |
185.8 |
0.846 |
2027 |
186.6 |
0.850 |
2028 |
187.4 |
0.855 |
2029 |
188.2 |
0.859 |
2030 |
188.9 |
0.864 |
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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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