20198+4522 STT 406 (HD 193701)
20h 19m 49.69s +45° 21' 49.7" P.A. 100.00 sep 0.3 mag 7.25,8.74 Sp F5IV dist. 92.51 pc (301.77 l.y.)
| Coord 2000 |
20198+4522 |
|
Discov num |
STT 406 |
|
Comp |
|
|
Coord arcsec 2000 |
20 19 49.69 +45 21 49.7 |
|
| Date first |
1845 |
|
Date last |
2011 |
|
Obs |
161 |
|
| Pa first |
133 |
|
Pa last |
99.6 |
|
P.A. Now (θ) |
70.2° |
|
| Sep first |
0.6 |
|
Sep last |
0.318 |
|
Sep. Now (ρ) |
0.13" |
|
| Mag pri |
7.25 |
|
Mag sec |
8.74 |
|
delta mag (ΔM) |
1.49 |
|
Spectral class |
F5IV (yellow-white) |
|
| Pri motion ra |
+018 |
|
Sec motion ra |
+018 |
|
| Pri motion dec |
-029 |
|
Sec motion dec |
-029 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 193701 |
|
Constellation |
Cygnus |
|
SAO |
49481 |
|
HIP |
100241 |
|
| Tycho2 |
3572-00337-1 |
|
Gaia DR2 |
2081494847057615104 |
|
HD |
193701 |
|
GC |
28294 |
|
| ADS |
13723 |
|
BD |
BD+44 3429 |
|
Distance |
92.51 |
|
Distance ly |
301.77 |
|
ORBITAL ELEMENTS
| Period (P) | 112.16y | ± 0.76 |
Periastron (T) | 1915.57y | ± 0.47 |
Semi-major axis (a) | 0.3a | ± 0.019 |
| Eccentricity (e) | 0.855 | ± 0.019 |
Inclination (i) | 141.2° | ± 6.4 |
Longitude of periastron (ω) | 184.4° | ± 8.6 |
| Node (Ω) | 124° | ± 6.9 |
Notes | n | |
Reference | Sca2021b | |
| Equinox | | |
Last observation | 2021 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
108.1 |
0.446 |
| 2001 |
107.6 |
0.438 |
| 2002 |
106.9 |
0.430 |
| 2003 |
106.3 |
0.421 |
| 2004 |
105.6 |
0.411 |
| 2005 |
104.9 |
0.402 |
| 2006 |
104.2 |
0.392 |
| 2007 |
103.4 |
0.381 |
| 2008 |
102.6 |
0.370 |
| 2009 |
101.7 |
0.359 |
| 2010 |
100.7 |
0.347 |
| 2011 |
99.7 |
0.334 |
| 2012 |
98.6 |
0.321 |
| 2013 |
97.5 |
0.308 |
| 2014 |
96.2 |
0.293 |
| 2015 |
94.7 |
0.279 |
| 2016 |
93.1 |
0.263 |
| 2017 |
91.3 |
0.247 |
| 2018 |
89.3 |
0.230 |
| 2019 |
86.9 |
0.212 |
| 2020 |
84.0 |
0.193 |
| 2021 |
80.5 |
0.173 |
| 2022 |
76.1 |
0.152 |
| 2023 |
70.2 |
0.130 |
| 2024 |
61.9 |
0.107 |
| 2025 |
48.8 |
0.083 |
| 2026 |
25.7 |
0.061 |
| 2027 |
343.3 |
0.047 |
| 2028 |
283.7 |
0.043 |
| 2029 |
228.1 |
0.052 |
| 2030 |
197.0 |
0.074 |
|
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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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