20216+1930 COU 327 AB
20h 21m 35.69s +19° 29' 40.1" P.A. 247.00 sep 0.2 mag 9.10,9.10 Sp F8 dist. 188.68 pc (615.47 l.y.)
| Coord 2000 |
20216+1930 |
|
Discov num |
COU 327 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 21 35.69 +19 29 40.1 |
|
| Date first |
1968 |
|
Date last |
2023 |
|
Obs |
25 |
|
| Pa first |
72 |
|
Pa last |
246.7 |
|
P.A. Now (θ) |
250° |
|
| Sep first |
0.2 |
|
Sep last |
0.168 |
|
Sep. Now (ρ) |
0.102" |
|
| Mag pri |
9.10 |
|
Mag sec |
9.10 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
+009 |
|
Sec motion ra |
|
|
| Pri motion dec |
+001 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20216+1930 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
106021 |
20 21 36 +19 29 40 |
COU 327 AB |
2023 |
25 |
247 |
0.2 |
9.10 |
9.10 |
0.00 |
Y |
<=== |
| Show |
HD 193797 |
106021 |
20 21 36 +19 29 40 |
COU 327 AB,C |
2016 |
9 |
133 |
4.0 |
8.41 |
11.97 |
3.56 |
|
|
| Show |
|
106021 |
20 21 36 +19 29 40 |
COU 327 AB,D |
2016 |
4 |
189 |
6.9 |
8.41 |
15.10 |
6.69 |
|
|
Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Delphinus |
|
SAO |
106021 |
|
HIP |
100397 |
|
Tycho2 |
1639-02397-1 |
|
| Gaia DR2 |
1816309371324521728 |
|
HD |
193797 |
|
BD |
BD+19 4380 |
|
Distance |
188.68 |
|
| Distance ly |
615.47 |
|
ORBITAL ELEMENTS
| Period (P) | 51.7y | ± 2.5 |
Periastron (T) | 1987.21y | ± 0.7 |
Semi-major axis (a) | 0.1306a | ± 0.0037 |
| Eccentricity (e) | 0.46 | ± 0.05 |
Inclination (i) | 81° | ± 1.5 |
Longitude of periastron (ω) | 326.1° | ± 11.6 |
| Node (Ω) | 67.5° | ± 0.9 |
Notes | n | |
Reference | Tok2024c | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
212.2 |
0.041 |
| 2001 |
220.0 |
0.052 |
| 2002 |
225.0 |
0.063 |
| 2003 |
228.6 |
0.074 |
| 2004 |
231.2 |
0.085 |
| 2005 |
233.2 |
0.096 |
| 2006 |
234.8 |
0.106 |
| 2007 |
236.2 |
0.115 |
| 2008 |
237.3 |
0.124 |
| 2009 |
238.4 |
0.132 |
| 2010 |
239.2 |
0.140 |
| 2011 |
240.0 |
0.147 |
| 2012 |
240.8 |
0.153 |
| 2013 |
241.5 |
0.159 |
| 2014 |
242.1 |
0.164 |
| 2015 |
242.7 |
0.168 |
| 2016 |
243.3 |
0.171 |
| 2017 |
243.8 |
0.174 |
| 2018 |
244.4 |
0.175 |
| 2019 |
244.9 |
0.176 |
| 2020 |
245.4 |
0.176 |
| 2021 |
246.0 |
0.175 |
| 2022 |
246.5 |
0.173 |
| 2023 |
247.1 |
0.170 |
| 2024 |
247.7 |
0.165 |
| 2025 |
248.3 |
0.160 |
| 2026 |
249.0 |
0.153 |
| 2027 |
249.7 |
0.145 |
| 2028 |
250.5 |
0.135 |
| 2029 |
251.5 |
0.124 |
| 2030 |
252.7 |
0.112 |
| 2031 |
254.2 |
0.098 |
| 2032 |
256.3 |
0.082 |
| 2033 |
259.4 |
0.064 |
| 2034 |
265.1 |
0.045 |
| 2035 |
279.4 |
0.026 |
| 2036 |
340.2 |
0.013 |
| 2037 |
41.1 |
0.025 |
| 2038 |
55.8 |
0.044 |
| 2039 |
61.9 |
0.060 |
| 2040 |
65.7 |
0.071 |
| 2041 |
68.8 |
0.076 |
| 2042 |
71.6 |
0.076 |
| 2043 |
74.6 |
0.071 |
| 2044 |
78.2 |
0.064 |
| 2045 |
83.0 |
0.055 |
| 2046 |
89.8 |
0.044 |
| 2047 |
100.8 |
0.034 |
| 2048 |
120.1 |
0.025 |
| 2049 |
151.6 |
0.022 |
| 2050 |
183.7 |
0.025 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
