18033+3921 STF 2275
18h 03m 17.38s +39° 20' 58.5" P.A. 124.00 sep 0.3 mag 10.11,10.16 Sp G0 dist. 123.92 pc (404.23 l.y.)
| Coord 2000 |
18033+3921 |
|
Discov num |
STF2275 |
|
Comp |
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Coord arcsec 2000 |
18 03 17.38 +39 20 58.5 |
|
| Date first |
1832 |
|
Date last |
2016 |
|
Obs |
73 |
|
| Pa first |
128 |
|
Pa last |
123.5 |
|
P.A. Now (θ) |
123.5° |
|
| Sep first |
1.1 |
|
Sep last |
0.336 |
|
Sep. Now (ρ) |
0.336" |
|
| Mag pri |
10.11 |
|
Mag sec |
10.16 |
|
delta mag (ΔM) |
0.05 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
+015 |
|
Sec motion ra |
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| Pri motion dec |
-024 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
HIP |
88432 |
|
Tycho2 |
3102-00533-1 |
|
ADS |
11023 |
|
| BD |
BD+39 3308 |
|
Distance |
123.92 |
|
Distance ly |
404.23 |
|
ORBITAL ELEMENTS
| Period (P) | 525.46y | ± 22.316 |
Periastron (T) | 2012.872y | ± 42.54 |
Semi-major axis (a) | 0.6786a | ± 0.2007 |
| Eccentricity (e) | 0.4767 | ± 0.0339 |
Inclination (i) | 77.95° | ± 10.16 |
Longitude of periastron (ω) | 142.76° | ± 76.34 |
| Node (Ω) | 131.6° | ± 2.84 |
Notes | n | |
Reference | Pop2000a | |
| Equinox | 2000 | |
Last observation | 1953 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
287.6 |
0.171 |
| 2001 |
289.5 |
0.181 |
| 2002 |
291.2 |
0.190 |
| 2003 |
292.7 |
0.200 |
| 2004 |
294.1 |
0.209 |
| 2005 |
295.4 |
0.219 |
| 2006 |
296.5 |
0.228 |
| 2007 |
297.6 |
0.237 |
| 2008 |
298.6 |
0.246 |
| 2009 |
299.5 |
0.254 |
| 2010 |
300.4 |
0.263 |
| 2011 |
301.2 |
0.271 |
| 2012 |
302.0 |
0.279 |
| 2013 |
302.7 |
0.287 |
| 2014 |
303.4 |
0.295 |
| 2015 |
304.0 |
0.302 |
| 2016 |
304.6 |
0.309 |
| 2017 |
305.2 |
0.316 |
| 2018 |
305.8 |
0.323 |
| 2019 |
306.3 |
0.329 |
| 2020 |
306.9 |
0.335 |
| 2021 |
307.4 |
0.341 |
| 2022 |
307.9 |
0.346 |
| 2023 |
308.3 |
0.351 |
| 2024 |
308.8 |
0.356 |
| 2025 |
309.2 |
0.361 |
| 2026 |
309.7 |
0.365 |
| 2027 |
310.1 |
0.369 |
| 2028 |
310.5 |
0.372 |
| 2029 |
310.9 |
0.375 |
| 2030 |
311.4 |
0.378 |
|
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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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