21214+1020 A 617 (HD 203345)
21h 21m 21.56s +10° 19' 56.6" P.A. 45.00 sep 0.0 mag 7.50,7.50 Sp F7V dist. 47.89 pc (156.22 l.y.)
Coord 2000 |
21214+1020 |
|
Discov num |
A 617 |
|
Comp |
|
|
Coord arcsec 2000 |
21 21 21.56 +10 19 56.6 |
|
Date first |
1903 |
|
Date last |
2021 |
|
Obs |
152 |
|
Pa first |
273 |
|
Pa last |
44.6 |
|
P.A. Now (θ) |
108.7° |
|
Sep first |
0.2 |
|
Sep last |
0.045 |
|
Sep. Now (ρ) |
0.118" |
|
Mag pri |
7.50 |
|
Mag sec |
7.50 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
F7V (yellow-white) |
|
Pri motion ra |
+045 |
|
Sec motion ra |
|
|
Pri motion dec |
-043 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 203345 |
|
Constellation |
Equuleus |
|
SAO |
107061 |
|
HIP |
105431 |
|
Tycho2 |
1110-01491-1 |
|
Gaia DR2 |
1745244296985069184 |
|
HD |
203345 |
|
GC |
29887 |
|
ADS |
14893 |
|
BD |
BD+09 4786 |
|
Distance |
47.89 |
|
Distance ly |
156.22 |
|
ORBITAL ELEMENTS
Period (P) | 6.03y | |
Periastron (T) | 1991.9y | |
Semi-major axis (a) | 0.097a | |
Eccentricity (e) | 0.86 | |
Inclination (i) | 135° | |
Longitude of periastron (ω) | 23° | |
Node (Ω) | 288° | |
Notes | n | |
Reference | Sod1999 | |
Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
97.8 |
0.166 |
2001 |
90.9 |
0.173 |
2002 |
83.5 |
0.153 |
2003 |
71.0 |
0.102 |
2004 |
216.4 |
0.012 |
2005 |
107.5 |
0.124 |
2006 |
98.0 |
0.165 |
2007 |
91.1 |
0.173 |
2008 |
83.7 |
0.154 |
2009 |
71.6 |
0.104 |
2010 |
258.8 |
0.012 |
2011 |
107.9 |
0.122 |
2012 |
98.2 |
0.165 |
2013 |
91.3 |
0.173 |
2014 |
84.0 |
0.155 |
2015 |
72.1 |
0.106 |
2016 |
292.8 |
0.014 |
2017 |
108.3 |
0.120 |
2018 |
98.5 |
0.164 |
2019 |
91.5 |
0.174 |
2020 |
84.2 |
0.156 |
2021 |
72.7 |
0.108 |
2022 |
318.8 |
0.016 |
2023 |
108.7 |
0.118 |
2024 |
98.7 |
0.163 |
2025 |
91.7 |
0.174 |
2026 |
84.5 |
0.157 |
2027 |
73.2 |
0.110 |
2028 |
339.6 |
0.018 |
2029 |
109.2 |
0.116 |
2030 |
98.9 |
0.162 |
2031 |
91.9 |
0.174 |
2032 |
84.7 |
0.158 |
2033 |
73.7 |
0.112 |
2034 |
355.8 |
0.021 |
2035 |
109.6 |
0.113 |
2036 |
99.1 |
0.161 |
2037 |
92.1 |
0.174 |
2038 |
85.0 |
0.159 |
2039 |
74.2 |
0.114 |
2040 |
8.3 |
0.024 |
2041 |
110.1 |
0.111 |
2042 |
99.4 |
0.161 |
2043 |
92.3 |
0.174 |
2044 |
85.2 |
0.159 |
2045 |
74.6 |
0.115 |
2046 |
17.9 |
0.027 |
2047 |
110.6 |
0.109 |
2048 |
99.6 |
0.160 |
2049 |
92.5 |
0.174 |
2050 |
85.5 |
0.160 |
|
|

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|

Measures: green=micrometric, blue=interferometric, purple=photographic |
|