03321+4340 COU 1688 AB (HD 21727)
03h 32m 05.10s +43° 40' 11.5" P.A. 153.00 sep 0.4 mag 8.56,8.90 Sp G5 dist. 60.79 pc (198.3 l.y.)
Coord 2000 |
03321+4340 |
|
Discov num |
COU1688 |
|
Comp |
AB |
|
Coord arcsec 2000 |
03 32 05.10 +43 40 11.5 |
|
Date first |
1978 |
|
Date last |
2012 |
|
Obs |
6 |
|
Pa first |
29 |
|
Pa last |
152.9 |
|
P.A. Now (θ) |
152.9° |
|
Sep first |
0.1 |
|
Sep last |
0.435 |
|
Sep. Now (ρ) |
0.435" |
|
Mag pri |
8.56 |
|
Mag sec |
8.90 |
|
delta mag (ΔM) |
0.34 |
|
Spectral class |
G5 (yellow) |
|
Pri motion ra |
+298 |
|
Sec motion ra |
|
|
Pri motion dec |
-120 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
03321+4340 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 21727 |
38921 |
03 32 05 +43 40 12 |
COU 1688 AB |
2012 |
6 |
153 |
0.4 |
8.56 |
8.90 |
0.34 |
Y |
<=== |
Show |
|
38921 |
03 32 05 +43 40 12 |
LDS 9155 AC |
2016 |
11 |
137 |
14.7 |
8.56 |
13.09 |
4.53 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 21727 |
|
Constellation |
Perseus |
|
SAO |
38921 |
|
HIP |
16467 |
|
Tycho2 |
2874-00788-1 |
|
Gaia DR2 |
238521867779351296 |
|
HD |
21727 |
|
BD |
BD+43 744 |
|
Distance |
60.79 |
|
Distance ly |
198.3 |
|
ORBITAL ELEMENTS
Period (P) | 9.15y | |
Periastron (T) | 1987.02y | |
Semi-major axis (a) | 0.144a | |
Eccentricity (e) | 0.08 | |
Inclination (i) | 43.7° | |
Longitude of periastron (ω) | 303.9° | |
Node (Ω) | 26.5° | |
Notes | n | |
Reference | Baz1993d | |
Equinox | 2000 | |
Last observation | 1986 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
128.5 |
0.113 |
2001 |
168.2 |
0.134 |
2002 |
196.8 |
0.150 |
2003 |
224.0 |
0.140 |
2004 |
262.8 |
0.108 |
2005 |
322.1 |
0.101 |
2006 |
8.0 |
0.128 |
2007 |
40.2 |
0.137 |
2008 |
75.6 |
0.120 |
2009 |
121.4 |
0.111 |
2010 |
163.1 |
0.130 |
2011 |
192.9 |
0.149 |
2012 |
219.5 |
0.143 |
2013 |
255.5 |
0.112 |
2014 |
313.1 |
0.098 |
2015 |
2.5 |
0.124 |
2016 |
35.6 |
0.137 |
2017 |
69.6 |
0.123 |
2018 |
114.3 |
0.111 |
2019 |
157.8 |
0.126 |
2020 |
188.9 |
0.147 |
2021 |
215.3 |
0.146 |
2022 |
248.9 |
0.117 |
2023 |
303.9 |
0.097 |
2024 |
356.6 |
0.120 |
2025 |
30.9 |
0.138 |
2026 |
63.9 |
0.126 |
2027 |
107.1 |
0.111 |
2028 |
152.1 |
0.123 |
2029 |
184.8 |
0.145 |
2030 |
211.2 |
0.148 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|