03177+3838 STT 53 AB (HD 20347)
03h 17m 44.01s +38° 38' 21.1" P.A. 232.00 sep 0.6 mag 7.73,8.50 Sp G0 dist. 60.1 pc (196.05 l.y.)
Coord 2000 |
03177+3838 |
|
Discov num |
STT 53 |
|
Comp |
AB |
|
Coord arcsec 2000 |
03 17 44.01 +38 38 21.1 |
|
Date first |
1843 |
|
Date last |
2018 |
|
Obs |
151 |
|
Pa first |
270 |
|
Pa last |
231.9 |
|
P.A. Now (θ) |
225° |
|
Sep first |
0.7 |
|
Sep last |
0.55 |
|
Sep. Now (ρ) |
0.518" |
|
Mag pri |
7.73 |
|
Mag sec |
8.50 |
|
delta mag (ΔM) |
0.77 |
|
Spectral class |
G0 (yellow) |
|
Pri motion ra |
+112 |
|
Sec motion ra |
+112 |
|
Pri motion dec |
-044 |
|
Sec motion dec |
-044 |
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
03177+3838 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 20347 |
56320 |
03 17 44 +38 38 21 |
STT 53 AB |
2018 |
151 |
232 |
0.6 |
7.73 |
8.50 |
0.77 |
Y |
<=== |
Show |
|
56320 |
03 17 44 +38 38 21 |
TOK 237 AC |
2002 |
6 |
180 |
106.6 |
7.73 |
13.34 |
5.61 |
|
|
Show |
|
|
03 17 44 +38 36 34 |
RAO 10 Ca,Cb |
2016 |
3 |
222 |
1.6 |
13.00 |
17.00 |
4.00 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 20347 |
|
Constellation |
Perseus |
|
SAO |
56320 |
|
HIP |
15329 |
|
Tycho2 |
2848-01379-1 |
|
Gaia DR2 |
235543604311944320 |
|
HD |
20347 |
|
GC |
3926 |
|
ADS |
2446 |
|
BD |
BD+38 689 |
|
Distance |
60.1 |
|
Distance ly |
196.05 |
|
ORBITAL ELEMENTS
Period (P) | 114.3y | ± 0.96 |
Periastron (T) | 1931.8y | ± 1 |
Semi-major axis (a) | 0.71a | ± 0.024 |
Eccentricity (e) | 0.86 | ± 0.01 |
Inclination (i) | 121.7° | ± 1.7 |
Longitude of periastron (ω) | 70.9° | ± 2.1 |
Node (Ω) | 135.1° | ± 3 |
Notes | n | |
Reference | Rbr2018 | |
Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
250.3 |
0.726 |
2001 |
249.5 |
0.719 |
2002 |
248.6 |
0.712 |
2003 |
247.8 |
0.705 |
2004 |
246.9 |
0.698 |
2005 |
246.0 |
0.690 |
2006 |
245.1 |
0.682 |
2007 |
244.2 |
0.674 |
2008 |
243.3 |
0.666 |
2009 |
242.3 |
0.657 |
2010 |
241.3 |
0.649 |
2011 |
240.3 |
0.640 |
2012 |
239.2 |
0.631 |
2013 |
238.1 |
0.621 |
2014 |
237.0 |
0.612 |
2015 |
235.8 |
0.602 |
2016 |
234.7 |
0.592 |
2017 |
233.4 |
0.582 |
2018 |
232.1 |
0.572 |
2019 |
230.8 |
0.561 |
2020 |
229.4 |
0.551 |
2021 |
228.0 |
0.540 |
2022 |
226.5 |
0.529 |
2023 |
225.0 |
0.518 |
2024 |
223.3 |
0.506 |
2025 |
221.6 |
0.494 |
2026 |
219.8 |
0.483 |
2027 |
218.0 |
0.471 |
2028 |
216.0 |
0.459 |
2029 |
213.9 |
0.446 |
2030 |
211.7 |
0.434 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|