16169+0113 A 2181 (HD 146564)
16h 16m 52.42s +01° 13' 17.3" P.A. 88.00 sep 0.6 mag 10.12,10.20 Sp G0 dist. 162.34 pc (529.55 l.y.)
| Coord 2000 |
16169+0113 |
|
Discov num |
A 2181 |
|
Comp |
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|
Coord arcsec 2000 |
16 16 52.42 +01 13 17.3 |
|
| Date first |
1910 |
|
Date last |
2017 |
|
Obs |
46 |
|
| Pa first |
300 |
|
Pa last |
87.8 |
|
P.A. Now (θ) |
87.8° |
|
| Sep first |
0.4 |
|
Sep last |
0.59 |
|
Sep. Now (ρ) |
0.59" |
|
| Mag pri |
10.12 |
|
Mag sec |
10.20 |
|
delta mag (ΔM) |
0.08 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
-045 |
|
Sec motion ra |
-045 |
|
| Pri motion dec |
+018 |
|
Sec motion dec |
+018 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 146564 |
|
Constellation |
Serpens |
|
HIP |
79774 |
|
Tycho2 |
0368-01562-1 |
|
| HD |
146564 |
|
ADS |
9989 |
|
BD |
BD+01 3191 |
|
Distance |
162.34 |
|
| Distance ly |
529.55 |
|
ORBITAL ELEMENTS
| Period (P) | 285.69y | |
Periastron (T) | 1962.37y | |
Semi-major axis (a) | 0.4331a | |
| Eccentricity (e) | 0.1259 | |
Inclination (i) | 11.94° | |
Longitude of periastron (ω) | 245.12° | |
| Node (Ω) | 137.33° | |
Notes | | |
Reference | Pop1995d | |
| Equinox | 2000 | |
Last observation | 1981 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
82.3 |
0.395 |
| 2001 |
83.7 |
0.396 |
| 2002 |
85.2 |
0.397 |
| 2003 |
86.6 |
0.398 |
| 2004 |
88.1 |
0.400 |
| 2005 |
89.5 |
0.401 |
| 2006 |
90.9 |
0.402 |
| 2007 |
92.3 |
0.404 |
| 2008 |
93.7 |
0.405 |
| 2009 |
95.1 |
0.406 |
| 2010 |
96.5 |
0.408 |
| 2011 |
97.9 |
0.409 |
| 2012 |
99.3 |
0.410 |
| 2013 |
100.6 |
0.412 |
| 2014 |
102.0 |
0.413 |
| 2015 |
103.3 |
0.414 |
| 2016 |
104.6 |
0.416 |
| 2017 |
106.0 |
0.417 |
| 2018 |
107.3 |
0.419 |
| 2019 |
108.6 |
0.420 |
| 2020 |
109.9 |
0.421 |
| 2021 |
111.2 |
0.423 |
| 2022 |
112.4 |
0.424 |
| 2023 |
113.7 |
0.425 |
| 2024 |
115.0 |
0.427 |
| 2025 |
116.2 |
0.428 |
| 2026 |
117.5 |
0.430 |
| 2027 |
118.7 |
0.431 |
| 2028 |
120.0 |
0.432 |
| 2029 |
121.2 |
0.433 |
| 2030 |
122.4 |
0.435 |
|
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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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