17141+5608 STT 327 (HD 156389)
17h 14m 06.83s +56° 08' 01.7" P.A. 334.00 sep 0.4 mag 8.29,8.95 Sp F2 dist. 86.36 pc (281.71 l.y.)
| Coord 2000 |
17141+5608 |
|
Discov num |
STT 327 |
|
Comp |
|
|
Coord arcsec 2000 |
17 14 06.83 +56 08 01.7 |
|
| Date first |
1843 |
|
Date last |
2019 |
|
Obs |
99 |
|
| Pa first |
340 |
|
Pa last |
334.4 |
|
P.A. Now (θ) |
340.3° |
|
| Sep first |
0.4 |
|
Sep last |
0.441 |
|
Sep. Now (ρ) |
0.413" |
|
| Mag pri |
8.29 |
|
Mag sec |
8.95 |
|
delta mag (ΔM) |
0.66 |
|
Spectral class |
F2 (yellow-white) |
|
| Pri motion ra |
-017 |
|
Sec motion ra |
-017 |
|
| Pri motion dec |
+015 |
|
Sec motion dec |
+015 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 156389 |
|
Constellation |
Draco |
|
SAO |
30306 |
|
HIP |
84300 |
|
| Tycho2 |
3891-00660-1 |
|
Gaia DR2 |
1432714679499697920 |
|
HD |
156389 |
|
GC |
23300 |
|
| ADS |
10425 |
|
BD |
BD+56 1959 |
|
Distance |
86.36 |
|
Distance ly |
281.71 |
|
ORBITAL ELEMENTS
| Period (P) | 88.402y | |
Periastron (T) | 1968.19y | |
Semi-major axis (a) | 0.278a | |
| Eccentricity (e) | 0.653 | |
Inclination (i) | 57.3° | |
Longitude of periastron (ω) | 12.3° | |
| Node (Ω) | 146.4° | |
Notes | n | |
Reference | Msn2011c | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
325.2 |
0.433 |
| 2001 |
325.9 |
0.437 |
| 2002 |
326.5 |
0.441 |
| 2003 |
327.2 |
0.445 |
| 2004 |
327.8 |
0.447 |
| 2005 |
328.5 |
0.450 |
| 2006 |
329.1 |
0.451 |
| 2007 |
329.7 |
0.453 |
| 2008 |
330.4 |
0.454 |
| 2009 |
331.0 |
0.454 |
| 2010 |
331.6 |
0.454 |
| 2011 |
332.2 |
0.454 |
| 2012 |
332.9 |
0.453 |
| 2013 |
333.5 |
0.451 |
| 2014 |
334.1 |
0.449 |
| 2015 |
334.8 |
0.447 |
| 2016 |
335.4 |
0.444 |
| 2017 |
336.1 |
0.441 |
| 2018 |
336.8 |
0.437 |
| 2019 |
337.4 |
0.433 |
| 2020 |
338.1 |
0.429 |
| 2021 |
338.8 |
0.424 |
| 2022 |
339.6 |
0.418 |
| 2023 |
340.3 |
0.413 |
| 2024 |
341.1 |
0.406 |
| 2025 |
341.9 |
0.399 |
| 2026 |
342.7 |
0.392 |
| 2027 |
343.5 |
0.384 |
| 2028 |
344.4 |
0.376 |
| 2029 |
345.4 |
0.368 |
| 2030 |
346.3 |
0.359 |
|
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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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