20213+0250 HLD 158 (HD 193651)
20h 21m 17.43s +02° 50' 21.9" P.A. 41.00 sep 1.2 mag 9.71,9.78 Sp G0 dist. 440.53 pc (1437.01 l.y.)
Coord 2000 |
20213+0250 |
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Discov num |
HLD 158 |
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Comp |
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Coord arcsec 2000 |
20 21 17.43 +02 50 21.9 |
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Date first |
1882 |
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Date last |
2017 |
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Obs |
70 |
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Pa first |
40 |
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Pa last |
41.3 |
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P.A. Now (θ) |
40.1° |
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Sep first |
2.0 |
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Sep last |
1.204 |
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Sep. Now (ρ) |
1.26" |
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Mag pri |
9.71 |
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Mag sec |
9.78 |
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delta mag (ΔM) |
0.07 |
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Spectral class |
G0 (yellow) |
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Pri motion ra |
+064 |
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Sec motion ra |
+064 |
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Pri motion dec |
-019 |
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Sec motion dec |
-019 |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 193651 |
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Constellation |
Aquila |
|
SAO |
125710 |
|
HIP |
100355 |
|
Tycho2 |
0500-00340-1 |
|
Gaia DR2 |
4243405320259760128 |
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HD |
193651 |
|
ADS |
13738 |
|
BD |
BD+02 4138 |
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Distance |
440.53 |
|
Distance ly |
1437.01 |
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ORBITAL ELEMENTS
Period (P) | 232.4y | |
Periastron (T) | 1961.16y | |
Semi-major axis (a) | 0.858a | |
Eccentricity (e) | 0.746 | |
Inclination (i) | 128.6° | |
Longitude of periastron (ω) | 17.7° | |
Node (Ω) | 218.3° | |
Notes | n | |
Reference | Msn2017c | |
Equinox | 2000 | |
Last observation | 2016 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
48.9 |
0.966 |
2001 |
48.4 |
0.982 |
2002 |
47.9 |
0.998 |
2003 |
47.4 |
1.014 |
2004 |
47.0 |
1.029 |
2005 |
46.5 |
1.044 |
2006 |
46.1 |
1.059 |
2007 |
45.7 |
1.073 |
2008 |
45.3 |
1.087 |
2009 |
44.9 |
1.100 |
2010 |
44.5 |
1.114 |
2011 |
44.1 |
1.127 |
2012 |
43.7 |
1.139 |
2013 |
43.4 |
1.152 |
2014 |
43.0 |
1.164 |
2015 |
42.7 |
1.176 |
2016 |
42.3 |
1.187 |
2017 |
42.0 |
1.198 |
2018 |
41.7 |
1.209 |
2019 |
41.4 |
1.220 |
2020 |
41.0 |
1.230 |
2021 |
40.7 |
1.240 |
2022 |
40.4 |
1.250 |
2023 |
40.1 |
1.260 |
2024 |
39.8 |
1.269 |
2025 |
39.5 |
1.278 |
2026 |
39.2 |
1.287 |
2027 |
39.0 |
1.296 |
2028 |
38.7 |
1.304 |
2029 |
38.4 |
1.312 |
2030 |
38.1 |
1.320 |
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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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