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 |
|
Discov num |
HLD 158 |
|
Comp |
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|
Coord arcsec 2000 |
20 21 17.43 +02 50 21.9 |
|
| Date first |
1882 |
|
Date last |
2017 |
|
Obs |
70 |
|
| Pa first |
40 |
|
Pa last |
41.3 |
|
P.A. Now (θ) |
40.1° |
|
| Sep first |
2.0 |
|
Sep last |
1.204 |
|
Sep. Now (ρ) |
1.26" |
|
| Mag pri |
9.71 |
|
Mag sec |
9.78 |
|
delta mag (ΔM) |
0.07 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
+064 |
|
Sec motion ra |
+064 |
|
| Pri motion dec |
-019 |
|
Sec motion dec |
-019 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 193651 |
|
Constellation |
Aquila |
|
SAO |
125710 |
|
HIP |
100355 |
|
| Tycho2 |
0500-00340-1 |
|
Gaia DR2 |
4243405320259760128 |
|
HD |
193651 |
|
ADS |
13738 |
|
| BD |
BD+02 4138 |
|
Distance |
440.53 |
|
Distance ly |
1437.01 |
|
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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