15206+1523 HU 1160
15h 20m 38.97s +15° 22' 49.0" P.A. 180.00 sep 0.5 mag 9.59,9.72 Sp K2 dist. 30.69 pc (100.11 l.y.)
| Coord 2000 |
15206+1523 |
|
Discov num |
HU 1160 |
|
Comp |
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Coord arcsec 2000 |
15 20 38.97 +15 22 49.0 |
|
| Date first |
1905 |
|
Date last |
2017 |
|
Obs |
27 |
|
| Pa first |
224 |
|
Pa last |
180.3 |
|
P.A. Now (θ) |
180.3° |
|
| Sep first |
1.9 |
|
Sep last |
0.454 |
|
Sep. Now (ρ) |
0.454" |
|
| Mag pri |
9.59 |
|
Mag sec |
9.72 |
|
delta mag (ΔM) |
0.13 |
|
Spectral class |
K2 (yellow-orange) |
|
| Pri motion ra |
-441 |
|
Sec motion ra |
-441 |
|
| Pri motion dec |
-195 |
|
Sec motion dec |
-195 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Serpens |
|
HIP |
75090 |
|
Tycho2 |
1487-00451-1 |
|
ADS |
9595 |
|
| BD |
BD+15 2847 |
|
Distance |
30.69 |
|
Distance ly |
100.11 |
|
ORBITAL ELEMENTS
| Period (P) | 177.74y | ± 11.99 |
Periastron (T) | 2004.84y | ± 1.2 |
Semi-major axis (a) | 1.111a | ± 0.021 |
| Eccentricity (e) | 0.709 | ± 0.028 |
Inclination (i) | 55.2° | ± 4.5 |
Longitude of periastron (ω) | 10.1° | ± 11.3 |
| Node (Ω) | 39.4° | ± 5.2 |
Notes | n | |
Reference | Hrt2009 | |
| Equinox | | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
358.7 |
0.314 |
| 2001 |
8.7 |
0.319 |
| 2002 |
18.4 |
0.325 |
| 2003 |
27.8 |
0.329 |
| 2004 |
37.1 |
0.327 |
| 2005 |
46.8 |
0.318 |
| 2006 |
57.2 |
0.303 |
| 2007 |
68.9 |
0.285 |
| 2008 |
82.0 |
0.269 |
| 2009 |
96.6 |
0.259 |
| 2010 |
111.6 |
0.261 |
| 2011 |
125.7 |
0.275 |
| 2012 |
138.0 |
0.299 |
| 2013 |
148.3 |
0.331 |
| 2014 |
156.5 |
0.368 |
| 2015 |
163.2 |
0.409 |
| 2016 |
168.7 |
0.451 |
| 2017 |
173.2 |
0.495 |
| 2018 |
176.9 |
0.539 |
| 2019 |
180.2 |
0.582 |
| 2020 |
182.9 |
0.625 |
| 2021 |
185.3 |
0.667 |
| 2022 |
187.5 |
0.709 |
| 2023 |
189.4 |
0.749 |
| 2024 |
191.1 |
0.789 |
| 2025 |
192.6 |
0.828 |
| 2026 |
194.0 |
0.866 |
| 2027 |
195.3 |
0.903 |
| 2028 |
196.5 |
0.939 |
| 2029 |
197.6 |
0.974 |
| 2030 |
198.6 |
1.009 |
|
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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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