09513+6037 STF 1381 (HD 84998)
09h 51m 15.22s +60° 37' 00.1" P.A. 187.00 sep 0.8 mag 8.93,9.20 Sp G0 dist. 190.11 pc (620.14 l.y.)
| Coord 2000 |
09513+6037 |
|
Discov num |
STF1381 |
|
Comp |
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Coord arcsec 2000 |
09 51 15.22 +60 37 00.1 |
|
| Date first |
1832 |
|
Date last |
2017 |
|
Obs |
36 |
|
| Pa first |
214 |
|
Pa last |
187.3 |
|
P.A. Now (θ) |
187.3° |
|
| Sep first |
1.5 |
|
Sep last |
0.798 |
|
Sep. Now (ρ) |
0.798" |
|
| Mag pri |
8.93 |
|
Mag sec |
9.20 |
|
delta mag (ΔM) |
0.27 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
-018 |
|
Sec motion ra |
-018 |
|
| Pri motion dec |
+008 |
|
Sec motion dec |
+008 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 84998 |
|
Constellation |
Ursa Major |
|
SAO |
15002 |
|
HIP |
48343 |
|
| Tycho2 |
4136-01412-1 |
|
Gaia DR2 |
1050672528157395328 |
|
HD |
84998 |
|
GC |
13542 |
|
| ADS |
7536 |
|
BD |
BD+61 1146 |
|
Distance |
190.11 |
|
Distance ly |
620.14 |
|
ORBITAL ELEMENTS
| Period (P) | 1787.6479y | ± 725.5107 |
Periastron (T) | 2098.6393y | ± 234.0108 |
Semi-major axis (a) | 2.93227a | ± 1.51891 |
| Eccentricity (e) | 0.94926 | ± 0.24018 |
Inclination (i) | 114.995° | ± 17.693 |
Longitude of periastron (ω) | 71.237° | ± 43.483 |
| Node (Ω) | 115.994° | ± 68.258 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
190.8 |
0.890 |
| 2001 |
190.5 |
0.885 |
| 2002 |
190.2 |
0.880 |
| 2003 |
189.9 |
0.875 |
| 2004 |
189.6 |
0.870 |
| 2005 |
189.3 |
0.866 |
| 2006 |
189.0 |
0.861 |
| 2007 |
188.7 |
0.856 |
| 2008 |
188.4 |
0.851 |
| 2009 |
188.1 |
0.846 |
| 2010 |
187.7 |
0.841 |
| 2011 |
187.4 |
0.836 |
| 2012 |
187.1 |
0.831 |
| 2013 |
186.8 |
0.826 |
| 2014 |
186.4 |
0.822 |
| 2015 |
186.1 |
0.817 |
| 2016 |
185.7 |
0.812 |
| 2017 |
185.4 |
0.807 |
| 2018 |
185.0 |
0.802 |
| 2019 |
184.7 |
0.797 |
| 2020 |
184.3 |
0.792 |
| 2021 |
183.9 |
0.787 |
| 2022 |
183.5 |
0.782 |
| 2023 |
183.2 |
0.777 |
| 2024 |
182.8 |
0.772 |
| 2025 |
182.4 |
0.767 |
| 2026 |
182.0 |
0.762 |
| 2027 |
181.6 |
0.756 |
| 2028 |
181.2 |
0.751 |
| 2029 |
180.8 |
0.746 |
| 2030 |
180.4 |
0.741 |
| 2031 |
179.9 |
0.736 |
| 2032 |
179.5 |
0.731 |
| 2033 |
179.1 |
0.726 |
| 2034 |
178.6 |
0.720 |
| 2035 |
178.2 |
0.715 |
| 2036 |
177.7 |
0.710 |
| 2037 |
177.3 |
0.705 |
| 2038 |
176.8 |
0.699 |
| 2039 |
176.3 |
0.694 |
| 2040 |
175.9 |
0.689 |
| 2041 |
175.4 |
0.683 |
| 2042 |
174.9 |
0.678 |
| 2043 |
174.4 |
0.673 |
| 2044 |
173.9 |
0.667 |
| 2045 |
173.3 |
0.662 |
| 2046 |
172.8 |
0.657 |
| 2047 |
172.3 |
0.651 |
| 2048 |
171.7 |
0.646 |
| 2049 |
171.2 |
0.640 |
| 2050 |
170.6 |
0.634 |
|
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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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