21597+4907 HU 774 (HD 209103)
21h 59m 41.89s +49° 07' 23.4" P.A. 195.00 sep 0.2 mag 8.36,8.45 Sp A0 dist. 283.29 pc (924.09 l.y.)
Coord 2000 |
21597+4907 |
|
Discov num |
HU 774 |
|
Comp |
|
|
Coord arcsec 2000 |
21 59 41.89 +49 07 23.4 |
|
Date first |
1904 |
|
Date last |
2019 |
|
Obs |
35 |
|
Pa first |
153 |
|
Pa last |
195.3 |
|
P.A. Now (θ) |
208.1° |
|
Sep first |
0.2 |
|
Sep last |
0.17 |
|
Sep. Now (ρ) |
0.167" |
|
Mag pri |
8.36 |
|
Mag sec |
8.45 |
|
delta mag (ΔM) |
0.09 |
|
Spectral class |
A0 (white) |
|
Pri motion ra |
+007 |
|
Sec motion ra |
|
|
Pri motion dec |
-003 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 209103 |
|
Constellation |
Cygnus |
|
SAO |
51525 |
|
HIP |
108577 |
|
Tycho2 |
3613-01239-1 |
|
Gaia DR2 |
1976485233140206976 |
|
HD |
209103 |
|
GC |
30781 |
|
ADS |
15530 |
|
BD |
BD+48 3566 |
|
Distance |
283.29 |
|
Distance ly |
924.09 |
|
ORBITAL ELEMENTS
Period (P) | 85.56y | |
Periastron (T) | 2046.06y | |
Semi-major axis (a) | 0.138a | |
Eccentricity (e) | 0.528 | |
Inclination (i) | 20.8° | |
Longitude of periastron (ω) | 254.2° | |
Node (Ω) | 98.8° | |
Notes | n | |
Reference | Doc2013k | |
Equinox | 2000 | |
Last observation | 2008 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
166.6 |
0.198 |
2001 |
168.3 |
0.198 |
2002 |
169.9 |
0.198 |
2003 |
171.5 |
0.198 |
2004 |
173.1 |
0.198 |
2005 |
174.8 |
0.198 |
2006 |
176.4 |
0.197 |
2007 |
178.0 |
0.196 |
2008 |
179.7 |
0.196 |
2009 |
181.4 |
0.195 |
2010 |
183.0 |
0.194 |
2011 |
184.7 |
0.192 |
2012 |
186.5 |
0.191 |
2013 |
188.2 |
0.190 |
2014 |
190.0 |
0.188 |
2015 |
191.8 |
0.186 |
2016 |
193.7 |
0.184 |
2017 |
195.6 |
0.182 |
2018 |
197.5 |
0.180 |
2019 |
199.5 |
0.178 |
2020 |
201.5 |
0.175 |
2021 |
203.6 |
0.173 |
2022 |
205.8 |
0.170 |
2023 |
208.1 |
0.167 |
2024 |
210.4 |
0.164 |
2025 |
212.8 |
0.160 |
2026 |
215.3 |
0.157 |
2027 |
218.0 |
0.153 |
2028 |
220.8 |
0.150 |
2029 |
223.7 |
0.146 |
2030 |
226.8 |
0.141 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|