18229+1458 HU 581
18h 22m 54.84s +14° 58' 11.0" P.A. 122.00 sep 0.4 mag 8.80,9.40 Sp G0V dist. 79.3 pc (258.68 l.y.)
| Coord 2000 |
18229+1458 |
|
Discov num |
HU 581 |
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Comp |
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Coord arcsec 2000 |
18 22 54.84 +14 58 11.0 |
|
| Date first |
1902 |
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Date last |
2016 |
|
Obs |
47 |
|
| Pa first |
120 |
|
Pa last |
122.3 |
|
P.A. Now (θ) |
122.3° |
|
| Sep first |
0.3 |
|
Sep last |
0.365 |
|
Sep. Now (ρ) |
0.365" |
|
| Mag pri |
8.80 |
|
Mag sec |
9.40 |
|
delta mag (ΔM) |
0.6 |
|
Spectral class |
G0V (yellow) |
|
| Pri motion ra |
+003 |
|
Sec motion ra |
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| Pri motion dec |
+045 |
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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 |
90075 |
|
Tycho2 |
1022-01145-1 |
|
Gaia DR2 |
4521644399898524288 |
|
| ADS |
11300 |
|
BD |
BD+14 3507 |
|
Distance |
79.3 |
|
Distance ly |
258.68 |
|
ORBITAL ELEMENTS
| Period (P) | 54.11y | ± 6.05 |
Periastron (T) | 1992.13y | ± 0.64 |
Semi-major axis (a) | 0.234a | ± 0.046 |
| Eccentricity (e) | 0.797 | ± 0.173 |
Inclination (i) | 83.2° | ± 59.1 |
Longitude of periastron (ω) | 45° | ± 16.1 |
| Node (Ω) | 296.7° | ± 16.1 |
Notes | n | |
Reference | AST1991 | |
| Equinox | | |
Last observation | 1990 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
118.2 |
0.253 |
| 2001 |
118.6 |
0.268 |
| 2002 |
118.9 |
0.280 |
| 2003 |
119.2 |
0.291 |
| 2004 |
119.5 |
0.300 |
| 2005 |
119.8 |
0.307 |
| 2006 |
120.1 |
0.313 |
| 2007 |
120.3 |
0.318 |
| 2008 |
120.6 |
0.322 |
| 2009 |
120.8 |
0.324 |
| 2010 |
121.1 |
0.326 |
| 2011 |
121.3 |
0.326 |
| 2012 |
121.6 |
0.326 |
| 2013 |
121.8 |
0.325 |
| 2014 |
122.1 |
0.323 |
| 2015 |
122.3 |
0.320 |
| 2016 |
122.6 |
0.316 |
| 2017 |
122.8 |
0.312 |
| 2018 |
123.1 |
0.306 |
| 2019 |
123.4 |
0.301 |
| 2020 |
123.7 |
0.294 |
| 2021 |
124.0 |
0.287 |
| 2022 |
124.3 |
0.279 |
| 2023 |
124.7 |
0.270 |
| 2024 |
125.0 |
0.261 |
| 2025 |
125.4 |
0.251 |
| 2026 |
125.9 |
0.241 |
| 2027 |
126.3 |
0.230 |
| 2028 |
126.9 |
0.218 |
| 2029 |
127.4 |
0.206 |
| 2030 |
128.1 |
0.193 |
|
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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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