21223+5734 A 764 AB (HD 203802)
21h 22m 20.42s +57° 33' 54.6" P.A. 21.00 sep 1.3 mag 8.23,10.69 Sp G5 dist. 96.43 pc (314.55 l.y.)
| Coord 2000 |
21223+5734 |
|
Discov num |
A 764 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 22 20.42 +57 33 54.6 |
|
| Date first |
1904 |
|
Date last |
2020 |
|
Obs |
78 |
|
| Pa first |
254 |
|
Pa last |
21.1 |
|
P.A. Now (θ) |
21.1° |
|
| Sep first |
0.4 |
|
Sep last |
1.29 |
|
Sep. Now (ρ) |
1.29" |
|
| Mag pri |
8.23 |
|
Mag sec |
10.69 |
|
delta mag (ΔM) |
2.46 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+074 |
|
Sec motion ra |
+077 |
|
| Pri motion dec |
+026 |
|
Sec motion dec |
+028 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.044 (< 0.3, Physical double)
This double is physical.
21223+5734 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 203802 |
33367 |
21 22 20 +57 33 55 |
A 764 AB |
2020 |
78 |
21 |
1.3 |
8.23 |
10.69 |
2.46 |
Y |
<=== |
| Show |
|
33367 |
21 22 20 +57 33 55 |
POP 1233 AC |
2016 |
15 |
192 |
84.1 |
8.23 |
8.69 |
0.46 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 203802 |
|
Constellation |
Cepheus |
|
SAO |
33367 |
|
HIP |
105522 |
|
| Tycho2 |
3974-00445-1 |
|
Gaia DR2 |
2178964388196558848 |
|
HD |
203802 |
|
ADS |
14926 |
|
| BD |
BD+56 2564 |
|
Distance |
96.43 |
|
Distance ly |
314.55 |
|
ORBITAL ELEMENTS
| Period (P) | 470y | |
Periastron (T) | 1901.8y | |
Semi-major axis (a) | 1.033a | |
| Eccentricity (e) | 0.552 | |
Inclination (i) | 10° | |
Longitude of periastron (ω) | 125.2° | |
| Node (Ω) | 110.8° | |
Notes | n | |
Reference | Tok2021c | |
| Equinox | 2000 | |
Last observation | 2016 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
11.5 |
1.169 |
| 2001 |
12.0 |
1.176 |
| 2002 |
12.5 |
1.182 |
| 2003 |
13.0 |
1.188 |
| 2004 |
13.5 |
1.194 |
| 2005 |
13.9 |
1.200 |
| 2006 |
14.4 |
1.206 |
| 2007 |
14.9 |
1.212 |
| 2008 |
15.3 |
1.218 |
| 2009 |
15.8 |
1.224 |
| 2010 |
16.2 |
1.229 |
| 2011 |
16.6 |
1.235 |
| 2012 |
17.1 |
1.241 |
| 2013 |
17.5 |
1.246 |
| 2014 |
17.9 |
1.252 |
| 2015 |
18.4 |
1.257 |
| 2016 |
18.8 |
1.263 |
| 2017 |
19.2 |
1.268 |
| 2018 |
19.6 |
1.274 |
| 2019 |
20.0 |
1.279 |
| 2020 |
20.5 |
1.284 |
| 2021 |
20.9 |
1.289 |
| 2022 |
21.3 |
1.294 |
| 2023 |
21.7 |
1.300 |
| 2024 |
22.1 |
1.305 |
| 2025 |
22.4 |
1.310 |
| 2026 |
22.8 |
1.315 |
| 2027 |
23.2 |
1.320 |
| 2028 |
23.6 |
1.324 |
| 2029 |
24.0 |
1.329 |
| 2030 |
24.4 |
1.334 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
