10163+1744 STT 215 (HD 88987)
10h 16m 16.05s +17° 44' 24.6" P.A. 176.00 sep 1.5 mag 7.25,7.46 Sp A9IV dist. 114.55 pc (373.66 l.y.)
| Coord 2000 |
10163+1744 |
|
Discov num |
STT 215 |
|
Comp |
|
|
Coord arcsec 2000 |
10 16 16.05 +17 44 24.6 |
|
| Date first |
1843 |
|
Date last |
2019 |
|
Obs |
455 |
|
| Pa first |
256 |
|
Pa last |
176.4 |
|
P.A. Now (θ) |
176.4° |
|
| Sep first |
0.3 |
|
Sep last |
1.49 |
|
Sep. Now (ρ) |
1.49" |
|
| Mag pri |
7.25 |
|
Mag sec |
7.46 |
|
delta mag (ΔM) |
0.21 |
|
Spectral class |
A9IV (white) |
|
| Pri motion ra |
-007 |
|
Sec motion ra |
-007 |
|
| Pri motion dec |
+001 |
|
Sec motion dec |
+001 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 88987 |
|
Constellation |
Leo |
|
SAO |
99032 |
|
HIP |
50305 |
|
| Tycho2 |
1422-00314-1 |
|
Gaia DR2 |
624033497996238208 |
|
HD |
88987 |
|
HR |
4028 |
|
| GC |
14090 |
|
ADS |
7704 |
|
BD |
BD+18 2338 |
|
Distance |
114.55 |
|
| Distance ly |
373.66 |
|
ORBITAL ELEMENTS
| Period (P) | 467.9925y | ± 231.1361 |
Periastron (T) | 1773.3079y | ± 57.3406 |
Semi-major axis (a) | 1.0576a | ± 0.3466 |
| Eccentricity (e) | 0.44688 | ± 0.22861 |
Inclination (i) | 122.9° | ± 8.305 |
Longitude of periastron (ω) | 158.44° | ± 53.493 |
| Node (Ω) | 165.634° | ± 16.153 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
179.2 |
1.437 |
| 2001 |
179.0 |
1.440 |
| 2002 |
178.8 |
1.443 |
| 2003 |
178.6 |
1.445 |
| 2004 |
178.4 |
1.448 |
| 2005 |
178.2 |
1.450 |
| 2006 |
178.0 |
1.453 |
| 2007 |
177.8 |
1.455 |
| 2008 |
177.6 |
1.457 |
| 2009 |
177.4 |
1.459 |
| 2010 |
177.2 |
1.461 |
| 2011 |
177.0 |
1.463 |
| 2012 |
176.8 |
1.465 |
| 2013 |
176.6 |
1.467 |
| 2014 |
176.4 |
1.469 |
| 2015 |
176.2 |
1.471 |
| 2016 |
176.1 |
1.472 |
| 2017 |
175.9 |
1.474 |
| 2018 |
175.7 |
1.475 |
| 2019 |
175.5 |
1.477 |
| 2020 |
175.3 |
1.478 |
| 2021 |
175.1 |
1.479 |
| 2022 |
174.9 |
1.481 |
| 2023 |
174.7 |
1.482 |
| 2024 |
174.5 |
1.483 |
| 2025 |
174.3 |
1.484 |
| 2026 |
174.1 |
1.485 |
| 2027 |
174.0 |
1.486 |
| 2028 |
173.8 |
1.486 |
| 2029 |
173.6 |
1.487 |
| 2030 |
173.4 |
1.488 |
|
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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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