02537+3820 BU  524AB (20 Per)

 
 
02H 53M 42.58S +38 20' 15.6" P.A. 282.2 SEP 0.19 MAG 5.79,6.80 SP F4IV DIST. 70.67 PC (230.53 L.Y.)
 
 
Coord 2000
02537+3820
Discov num
BU  524
Comp
AB
Coord arcsec 2000
02 53 42.58 +38 20 15.6
Date first
1878
Date last
2008
Obs
222
Pa first
6
Pa last
321
P.A. Now (θ)
282.2°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.19"
Mag pri
5.79
Mag sec
6.80
delta mag (ΔM)
1.01
Spectral class
F4IV (yellow-white)
Pri motion ra
+050
Sec motion ra
Pri motion dec
-078
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
02537+3820 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20 Per 55975 02537+3820 BU 524 AB 1878 2008 222 282 0.2 5.79 6.80 1.01 Y <===
Show 55975 02537+3820 STF 318 AB,C 1782 2014 42 237 14.0 5.39 9.68 4.29
Show 55975 02537+3820 STF 318 AB,D 1913 2002 6 40 58.1 5.39 12.60 7.21
Quadruple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
20 Per
Constellation
Perseus
SAO
55975
HIP
13490
Tycho2
2846-01428-1
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
last precise pa
320.7
last precise sep
0.205
 
 
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 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.169 3.6
2001 0.182 357.5
2002 0.191 352.2
2003 0.198 347.3
2004 0.202 342.6
2005 0.204 338.0
2006 0.206 333.6
2007 0.206 329.2
2008 0.206 324.8
2009 0.205 320.3
2010 0.204 315.9
2011 0.202 311.3
2012 0.200 306.7
2013 0.198 302.0
2014 0.196 297.2
2015 0.194 292.3
2016 0.192 287.3
2017 0.190 282.2
2018 0.188 277.0
2019 0.185 271.6
2020 0.182 266.1
2021 0.179 260.4
2022 0.174 254.4
2023 0.169 248.0
2024 0.160 241.1
2025 0.148 233.3
2026 0.129 223.7
2027 0.095 209.0
2028 0.031 148.4
2029 0.083 33.7
2030 0.130 17.1

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic