16439+4329 D 15 (HD 151188)
16h 43m 56.29s +43° 28' 31.2" P.A. 335.00 sep 0.6 mag 9.04,9.27 Sp K5 dist. 27.03 pc (88.17 l.y.)
| Coord 2000 |
16439+4329 |
|
Discov num |
D 15 |
|
Comp |
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Coord arcsec 2000 |
16 43 56.29 +43 28 31.2 |
|
| Date first |
1869 |
|
Date last |
2016 |
|
Obs |
301 |
|
| Pa first |
133 |
|
Pa last |
335.3 |
|
P.A. Now (θ) |
311.9° |
|
| Sep first |
0.9 |
|
Sep last |
0.586 |
|
Sep. Now (ρ) |
0.601" |
|
| Mag pri |
9.04 |
|
Mag sec |
9.27 |
|
delta mag (ΔM) |
0.23 |
|
Spectral class |
K5 (yellow-orange) |
|
| Pri motion ra |
-075 |
|
Sec motion ra |
-075 |
|
| Pri motion dec |
-051 |
|
Sec motion dec |
-051 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 151188 |
|
Constellation |
Hercules |
|
SAO |
46250 |
|
HIP |
81919 |
|
| Tycho2 |
3082-00372-1 |
|
Gaia DR2 |
1357604806822301184 |
|
HD |
151188 |
|
ADS |
10188 |
|
| BD |
BD+43 2639 |
|
Distance |
27.03 |
|
Distance ly |
88.17 |
|
ORBITAL ELEMENTS
| Period (P) | 120.05y | ± 0.24 |
Periastron (T) | 1895.02y | ± 0.2 |
Semi-major axis (a) | 0.975a | ± 0.009 |
| Eccentricity (e) | 0.418 | ± 0.004 |
Inclination (i) | 118.2° | ± 0.4 |
Longitude of periastron (ω) | 149.7° | ± 0.9 |
| Node (Ω) | 145.6° | ± 0.5 |
Notes | n | |
Reference | Alz2007 | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
109.0 |
0.547 |
| 2001 |
104.5 |
0.502 |
| 2002 |
99.2 |
0.459 |
| 2003 |
92.8 |
0.418 |
| 2004 |
85.1 |
0.380 |
| 2005 |
75.8 |
0.348 |
| 2006 |
65.0 |
0.325 |
| 2007 |
52.9 |
0.312 |
| 2008 |
40.2 |
0.311 |
| 2009 |
27.9 |
0.323 |
| 2010 |
16.9 |
0.344 |
| 2011 |
7.3 |
0.373 |
| 2012 |
359.2 |
0.406 |
| 2013 |
352.3 |
0.440 |
| 2014 |
346.5 |
0.474 |
| 2015 |
341.4 |
0.506 |
| 2016 |
336.9 |
0.535 |
| 2017 |
332.8 |
0.559 |
| 2018 |
329.0 |
0.578 |
| 2019 |
325.4 |
0.592 |
| 2020 |
322.0 |
0.601 |
| 2021 |
318.6 |
0.605 |
| 2022 |
315.3 |
0.605 |
| 2023 |
311.9 |
0.601 |
| 2024 |
308.5 |
0.594 |
| 2025 |
305.0 |
0.584 |
| 2026 |
301.3 |
0.572 |
| 2027 |
297.5 |
0.559 |
| 2028 |
293.5 |
0.545 |
| 2029 |
289.2 |
0.530 |
| 2030 |
284.8 |
0.516 |
|
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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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