15075+5516 HU 143 Aa,Ab (HD 134418)
15h 07m 27.88s +55° 15' 57.0" P.A. 317.00 sep 0.4 mag 9.60,9.90 Sp G5
| Coord 2000 |
15075+5516 |
|
Discov num |
HU 143 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
15 07 27.88 +55 15 57.0 |
|
| Date first |
1900 |
|
Date last |
2016 |
|
Obs |
25 |
|
| Pa first |
127 |
|
Pa last |
316.9 |
|
P.A. Now (θ) |
316.9° |
|
| Sep first |
0.7 |
|
Sep last |
0.43 |
|
Sep. Now (ρ) |
0.43" |
|
| Mag pri |
9.60 |
|
Mag sec |
9.90 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
-046 |
|
Sec motion ra |
|
|
| Pri motion dec |
+061 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
15075+5516 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 134418 |
29414 |
15 07 28 +55 15 57 |
HU 143 Aa,Ab |
2016 |
25 |
317 |
0.4 |
9.60 |
9.90 |
0.30 |
Y |
<=== |
| Show |
|
29414 |
15 07 28 +55 15 57 |
UC 2929 AB |
2015 |
7 |
140 |
58.8 |
9.14 |
15.31 |
6.17 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 134418 |
|
Constellation |
Draco |
|
SAO |
29414 |
|
Tycho2 |
3871-00138-1 |
|
| Gaia DR2 |
1600436485302133248 |
|
HD |
134418 |
|
ADS |
9511 |
|
ORBITAL ELEMENTS
| Period (P) | 217y | |
Periastron (T) | 2006.7y | |
Semi-major axis (a) | 0.634a | |
| Eccentricity (e) | 0.343 | |
Inclination (i) | 74.7° | |
Longitude of periastron (ω) | 135.8° | |
| Node (Ω) | 139.1° | |
Notes | | |
Reference | Lin2019b | |
| Equinox | 2000 | |
Last observation | 2016 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
285.9 |
0.190 |
| 2001 |
290.1 |
0.208 |
| 2002 |
293.6 |
0.226 |
| 2003 |
296.6 |
0.244 |
| 2004 |
299.2 |
0.262 |
| 2005 |
301.4 |
0.279 |
| 2006 |
303.4 |
0.297 |
| 2007 |
305.2 |
0.313 |
| 2008 |
306.8 |
0.329 |
| 2009 |
308.3 |
0.344 |
| 2010 |
309.6 |
0.359 |
| 2011 |
310.9 |
0.372 |
| 2012 |
312.0 |
0.385 |
| 2013 |
313.1 |
0.397 |
| 2014 |
314.1 |
0.407 |
| 2015 |
315.1 |
0.417 |
| 2016 |
316.0 |
0.426 |
| 2017 |
316.9 |
0.434 |
| 2018 |
317.8 |
0.440 |
| 2019 |
318.6 |
0.446 |
| 2020 |
319.4 |
0.451 |
| 2021 |
320.2 |
0.455 |
| 2022 |
321.0 |
0.458 |
| 2023 |
321.8 |
0.459 |
| 2024 |
322.6 |
0.461 |
| 2025 |
323.4 |
0.461 |
| 2026 |
324.2 |
0.460 |
| 2027 |
324.9 |
0.459 |
| 2028 |
325.7 |
0.457 |
| 2029 |
326.5 |
0.454 |
| 2030 |
327.3 |
0.450 |
|
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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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