18581+4711 AG 366 (HD 176465)
18h 58m 03.46s +47° 11' 30.1" P.A. 183.00 sep 1.4 mag 8.54,8.67 Sp G2V+G8V dist. 49.55 pc (161.63 l.y.)
Coord 2000 |
18581+4711 |
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Discov num |
AG 366 |
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Comp |
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Coord arcsec 2000 |
18 58 03.46 +47 11 30.1 |
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Date first |
1907 |
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Date last |
2019 |
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Obs |
50 |
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Pa first |
229 |
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Pa last |
182.6 |
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P.A. Now (θ) |
182.6° |
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Sep first |
2.4 |
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Sep last |
1.411 |
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Sep. Now (ρ) |
1.411" |
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Mag pri |
8.54 |
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Mag sec |
8.67 |
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delta mag (ΔM) |
0.13 |
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Spectral class |
G2V+G8V (yellow/yellow) |
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Pri motion ra |
-040 |
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Sec motion ra |
-040 |
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Pri motion dec |
+012 |
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Sec motion dec |
+012 |
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Notes |
N
O
V
(See Notes, Orbital solution, Proper motion indicates physical) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 176465 |
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Constellation |
Lyra |
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SAO |
47960 |
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HIP |
93108 |
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Tycho2 |
3545-01998-1 |
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Gaia DR2 |
2131416557598645632 |
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HD |
176465 |
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BD |
BD+46 2592 |
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Distance |
49.55 |
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Distance ly |
161.63 |
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ORBITAL ELEMENTS
Period (P) | 1260.888y | |
Periastron (T) | 2078.3088y | |
Semi-major axis (a) | 2.68488a | |
Eccentricity (e) | 0.656 | |
Inclination (i) | 145.5° | |
Longitude of periastron (ω) | 75.1° | |
Node (Ω) | 180.5° | |
Notes | n | |
Reference | WSI2021 | |
Equinox | | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
196.1 |
1.573 |
2001 |
195.6 |
1.563 |
2002 |
195.1 |
1.553 |
2003 |
194.5 |
1.543 |
2004 |
194.0 |
1.534 |
2005 |
193.4 |
1.524 |
2006 |
192.9 |
1.513 |
2007 |
192.3 |
1.503 |
2008 |
191.8 |
1.493 |
2009 |
191.2 |
1.483 |
2010 |
190.6 |
1.473 |
2011 |
190.0 |
1.462 |
2012 |
189.4 |
1.452 |
2013 |
188.8 |
1.442 |
2014 |
188.2 |
1.431 |
2015 |
187.5 |
1.420 |
2016 |
186.9 |
1.410 |
2017 |
186.2 |
1.399 |
2018 |
185.6 |
1.388 |
2019 |
184.9 |
1.377 |
2020 |
184.2 |
1.367 |
2021 |
183.5 |
1.356 |
2022 |
182.8 |
1.345 |
2023 |
182.1 |
1.333 |
2024 |
181.4 |
1.322 |
2025 |
180.7 |
1.311 |
2026 |
179.9 |
1.300 |
2027 |
179.1 |
1.289 |
2028 |
178.4 |
1.277 |
2029 |
177.6 |
1.266 |
2030 |
176.8 |
1.254 |
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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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