21434+2353 HU 374 (HD 206719)
21h 43m 25.99s +23° 53' 05.4" P.A. 121.00 sep 0.2 mag 9.40,9.40 Sp F5 dist. 7142.86 pc (23300.01 l.y.)
Coord 2000 |
21434+2353 |
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Discov num |
HU 374 |
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Comp |
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Coord arcsec 2000 |
21 43 25.99 +23 53 05.4 |
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Date first |
1901 |
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Date last |
2012 |
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Obs |
20 |
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Pa first |
39 |
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Pa last |
121.1 |
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P.A. Now (θ) |
121.1° |
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Sep first |
0.3 |
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Sep last |
0.172 |
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Sep. Now (ρ) |
0.172" |
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Mag pri |
9.40 |
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Mag sec |
9.40 |
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delta mag (ΔM) |
0 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
-016 |
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Sec motion ra |
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Pri motion dec |
+005 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 206719 |
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Constellation |
Pegasus |
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SAO |
89926 |
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HIP |
107254 |
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Tycho2 |
2189-01566-1 |
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Gaia DR2 |
1794621989799247360 |
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HD |
206719 |
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BD |
BD+23 4379 |
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Distance |
7142.86 |
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Distance ly |
23300.01 |
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ORBITAL ELEMENTS
Period (P) | 130y | |
Periastron (T) | 1983.1y | |
Semi-major axis (a) | 0.229a | |
Eccentricity (e) | 0.569 | |
Inclination (i) | 120.5° | |
Longitude of periastron (ω) | 177.5° | |
Node (Ω) | 26.9° | |
Notes | | |
Reference | USN2002 | |
Equinox | 2000 | |
Last observation | 1987 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
77.8 |
0.123 |
2001 |
74.1 |
0.132 |
2002 |
70.8 |
0.141 |
2003 |
67.9 |
0.149 |
2004 |
65.4 |
0.158 |
2005 |
63.1 |
0.167 |
2006 |
61.0 |
0.175 |
2007 |
59.1 |
0.184 |
2008 |
57.4 |
0.192 |
2009 |
55.8 |
0.200 |
2010 |
54.4 |
0.208 |
2011 |
53.0 |
0.216 |
2012 |
51.8 |
0.224 |
2013 |
50.6 |
0.231 |
2014 |
49.5 |
0.238 |
2015 |
48.5 |
0.245 |
2016 |
47.5 |
0.252 |
2017 |
46.6 |
0.258 |
2018 |
45.7 |
0.265 |
2019 |
44.8 |
0.271 |
2020 |
44.0 |
0.276 |
2021 |
43.2 |
0.282 |
2022 |
42.5 |
0.288 |
2023 |
41.8 |
0.293 |
2024 |
41.1 |
0.298 |
2025 |
40.4 |
0.303 |
2026 |
39.7 |
0.307 |
2027 |
39.1 |
0.312 |
2028 |
38.5 |
0.316 |
2029 |
37.9 |
0.320 |
2030 |
37.3 |
0.324 |
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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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