23100-4252 DON 1042 (HD 218630)
23h 09m 57.37s -42° 51' 40.1" P.A. 145.00 sep 0.8 mag 6.00,9.05 Sp F5V dist. 33.41 pc (108.98 l.y.)
Coord 2000 |
23100-4252 |
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Discov num |
DON1042 |
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Comp |
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Coord arcsec 2000 |
23 09 57.37 -42 51 40.1 |
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Date first |
1930 |
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Date last |
2021 |
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Obs |
27 |
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Pa first |
164 |
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Pa last |
145.4 |
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P.A. Now (θ) |
148.4° |
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Sep first |
0.8 |
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Sep last |
0.804 |
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Sep. Now (ρ) |
0.831" |
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Mag pri |
6.00 |
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Mag sec |
9.05 |
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delta mag (ΔM) |
3.05 |
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Spectral class |
F5V (yellow-white) |
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Pri motion ra |
-316 |
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Sec motion ra |
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Pri motion dec |
-029 |
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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
Name |
HD 218630 |
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Constellation |
Grus |
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SAO |
231464 |
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HIP |
114382 |
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Tycho2 |
8012-01108-1 |
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HD |
218630 |
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HR |
8814 |
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GC |
32260 |
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CD |
CD-4315281 |
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CP |
CP-43 9709 |
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Distance |
33.41 |
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Distance ly |
108.98 |
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ORBITAL ELEMENTS
Period (P) | 98.27y | |
Periastron (T) | 1994.91y | |
Semi-major axis (a) | 0.804a | |
Eccentricity (e) | 0.553 | |
Inclination (i) | 39.7° | |
Longitude of periastron (ω) | 124° | |
Node (Ω) | 232.4° | |
Notes | | |
Reference | Zir2014a | |
Equinox | 2000 | |
Last observation | 2013 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
60.0 |
0.452 |
2001 |
67.0 |
0.477 |
2002 |
73.4 |
0.499 |
2003 |
79.2 |
0.519 |
2004 |
84.7 |
0.538 |
2005 |
89.7 |
0.556 |
2006 |
94.5 |
0.573 |
2007 |
99.0 |
0.589 |
2008 |
103.3 |
0.605 |
2009 |
107.3 |
0.621 |
2010 |
111.1 |
0.636 |
2011 |
114.8 |
0.652 |
2012 |
118.3 |
0.667 |
2013 |
121.6 |
0.682 |
2014 |
124.8 |
0.697 |
2015 |
127.9 |
0.712 |
2016 |
130.8 |
0.727 |
2017 |
133.6 |
0.742 |
2018 |
136.3 |
0.757 |
2019 |
138.9 |
0.772 |
2020 |
141.4 |
0.787 |
2021 |
143.8 |
0.802 |
2022 |
146.1 |
0.816 |
2023 |
148.4 |
0.831 |
2024 |
150.6 |
0.845 |
2025 |
152.6 |
0.859 |
2026 |
154.7 |
0.872 |
2027 |
156.6 |
0.886 |
2028 |
158.5 |
0.899 |
2029 |
160.4 |
0.912 |
2030 |
162.2 |
0.925 |
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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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