11308+4117 STT 234 (HD 100018)
11h 30m 49.91s +41° 17' 12.7" P.A. 189.00 sep 0.4 mag 7.45,8.13 Sp F6V dist. 74.79 pc (243.96 l.y.)
Coord 2000 |
11308+4117 |
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Discov num |
STT 234 |
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Comp |
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Coord arcsec 2000 |
11 30 49.91 +41 17 12.7 |
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Date first |
1843 |
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Date last |
2021 |
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Obs |
272 |
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Pa first |
180 |
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Pa last |
189.4 |
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P.A. Now (θ) |
194.9° |
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Sep first |
0.3 |
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Sep last |
0.4 |
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Sep. Now (ρ) |
0.357" |
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Mag pri |
7.45 |
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Mag sec |
8.13 |
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delta mag (ΔM) |
0.68 |
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Spectral class |
F6V (yellow-white) |
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Pri motion ra |
+092 |
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Sec motion ra |
+092 |
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Pri motion dec |
-098 |
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Sec motion dec |
-098 |
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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 100018 |
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Constellation |
Ursa Major |
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SAO |
43789 |
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HIP |
56165 |
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Tycho2 |
3015-02226-1 |
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HD |
100018 |
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GC |
15787 |
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ADS |
8189 |
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BD |
BD+42 2214 |
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Distance |
74.79 |
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Distance ly |
243.96 |
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ORBITAL ELEMENTS
Period (P) | 86.86y | ± 3 |
Periastron (T) | 1967.89y | ± 0.5 |
Semi-major axis (a) | 0.381a | ± 0.015 |
Eccentricity (e) | 0.356 | ± 0.015 |
Inclination (i) | 56.6° | ± 1.5 |
Longitude of periastron (ω) | 29.8° | ± 4 |
Node (Ω) | 336.4° | ± 2 |
Notes | n | |
Reference | Doc2009g | |
Equinox | 2000 | |
Last observation | 2000 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
159.2 |
0.490 |
2001 |
160.5 |
0.493 |
2002 |
161.8 |
0.495 |
2003 |
163.1 |
0.496 |
2004 |
164.3 |
0.496 |
2005 |
165.6 |
0.495 |
2006 |
166.8 |
0.493 |
2007 |
168.1 |
0.490 |
2008 |
169.4 |
0.487 |
2009 |
170.7 |
0.483 |
2010 |
172.1 |
0.478 |
2011 |
173.5 |
0.472 |
2012 |
174.9 |
0.466 |
2013 |
176.3 |
0.459 |
2014 |
177.8 |
0.451 |
2015 |
179.4 |
0.442 |
2016 |
181.0 |
0.433 |
2017 |
182.7 |
0.424 |
2018 |
184.4 |
0.414 |
2019 |
186.3 |
0.403 |
2020 |
188.2 |
0.392 |
2021 |
190.3 |
0.381 |
2022 |
192.5 |
0.369 |
2023 |
194.9 |
0.357 |
2024 |
197.4 |
0.344 |
2025 |
200.1 |
0.332 |
2026 |
203.0 |
0.319 |
2027 |
206.2 |
0.307 |
2028 |
209.6 |
0.294 |
2029 |
213.3 |
0.282 |
2030 |
217.4 |
0.270 |
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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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