02537+3820 BU 524 AB
02h 53m 42.58s +38° 20' 15.6" P.A. 319.00 sep 0.2 mag 5.79,6.80 Sp F4IV dist. 70.67 pc (230.53 l.y.)
Coord 2000 |
02537+3820 |
|
Discov num |
BU 524 |
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Comp |
AB |
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Coord arcsec 2000 |
02 53 42.58 +38 20 15.6 |
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Date first |
1878 |
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Date last |
2009 |
|
Obs |
223 |
|
Pa first |
6 |
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Pa last |
318.8 |
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P.A. Now (θ) |
248° |
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Sep first |
0.3 |
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Sep last |
0.225 |
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Sep. Now (ρ) |
0.169" |
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Mag pri |
5.79 |
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Mag sec |
6.80 |
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delta mag (ΔM) |
1.01 |
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Spectral class |
F4IV (yellow-white) |
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Pri motion ra |
+050 |
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Sec motion ra |
|
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Pri motion dec |
-078 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
02537+3820 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
55975 |
02 53 43 +38 20 16 |
BU 524 AB |
2009 |
223 |
319 |
0.2 |
5.79 |
6.80 |
1.01 |
Y |
<=== |
Show |
20 Per |
55975 |
02 53 43 +38 20 16 |
STF 318 AB,C |
2016 |
43 |
237 |
13.9 |
5.39 |
9.68 |
4.29 |
|
|
Show |
|
55975 |
02 53 43 +38 20 16 |
STF 318 AB,D |
2002 |
6 |
40 |
58.1 |
5.39 |
12.60 |
7.21 |
|
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Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Var name |
NSV977 Per |
|
Constellation |
Perseus |
|
SAO |
55975 |
|
HIP |
13490 |
|
Tycho2 |
2846-01428-1 |
|
Gaia DR2 |
143119137916819456 |
|
HD |
17904 |
|
HR |
855 |
|
GC |
3459 |
|
ADS |
2200 |
|
BD |
BD+37 655 |
|
Flamsteed |
20 Persei |
|
Flamsteed name |
20 Per |
|
Distance |
70.67 |
|
Distance ly |
230.53 |
|
ORBITAL ELEMENTS
Period (P) | 11553.9d (31.63y) | ± 8.7 |
Periastron (T) | 50255m (1996.471y) | ± 12 |
Semi-major axis (a) | 0.2224a | ± 0.0011 |
Eccentricity (e) | 0.756 | ± 0.0023 |
Inclination (i) | 120.48° | ± 0.2 |
Longitude of periastron (ω) | 265.54° | ± 0.11 |
Node (Ω) | 26.62° | ± 0.24 |
Notes | n | |
Reference | Mut2010b | |
Equinox | 2000 | |
Last observation | 2008 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
3.6 |
0.169 |
2001 |
357.5 |
0.182 |
2002 |
352.2 |
0.191 |
2003 |
347.3 |
0.198 |
2004 |
342.6 |
0.202 |
2005 |
338.0 |
0.204 |
2006 |
333.6 |
0.206 |
2007 |
329.2 |
0.206 |
2008 |
324.8 |
0.206 |
2009 |
320.3 |
0.205 |
2010 |
315.9 |
0.204 |
2011 |
311.3 |
0.202 |
2012 |
306.7 |
0.200 |
2013 |
302.0 |
0.198 |
2014 |
297.2 |
0.196 |
2015 |
292.3 |
0.194 |
2016 |
287.3 |
0.192 |
2017 |
282.2 |
0.190 |
2018 |
277.0 |
0.188 |
2019 |
271.6 |
0.185 |
2020 |
266.1 |
0.182 |
2021 |
260.4 |
0.179 |
2022 |
254.4 |
0.174 |
2023 |
248.0 |
0.169 |
2024 |
241.1 |
0.160 |
2025 |
233.3 |
0.148 |
2026 |
223.7 |
0.129 |
2027 |
209.0 |
0.095 |
2028 |
148.4 |
0.031 |
2029 |
33.7 |
0.083 |
2030 |
17.1 |
0.130 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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