02543+5246 LAB   1Aa,Ab

 
 
02H 54M 15.46S +52 45' 45.0" P.A. 260.8 SEP 0.02 MAG 4.20,5.90 SP G4III+A4V DIST. 77.94 PC (254.24 L.Y.)
 
 
Coord 2000
02543+5246
Discov num
LAB   1
Comp
Aa,Ab
Coord arcsec 2000
02 54 15.46 +52 45 45.0
Date first
1973
Date last
1994
Obs
12
Pa first
274
Pa last
276
P.A. Now (θ)
260.8°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.02"
Mag pri
4.20
Mag sec
5.90
delta mag (ΔM)
1.7
Spectral class
G4III+A4V (yellow/white)
Pri motion ra
-003
Sec motion ra
Pri motion dec
-005
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
02543+5246 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 23685 02543+5246 LAB 1 Aa,Ab 1973 1994 12 261 0.0 4.20 5.90 1.70 Y <===
Show Tau Per 23685 02543+5246 EDG 1 AB 1878 2009 8 107 51.6 3.95 12.28 8.33
Show 23685 02543+5246 BU 1376 AC 1878 2014 5 107 50.9 3.95 12.70 8.75
Show 23685 02543+5246 BU 1376 AD 1900 2002 3 338 42.9 3.95 11.50 7.55
Show 02543+5246 BU 1376 BC 1878 2009 7 86 4.2 12.28 12.70 0.42
Quintuple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Perseus
SAO
23685
HIP
13531
HD
17878
HR
854
GC
3462
ADS
2202
BD
BD+52 641
Bayer
Tau Persei
Bayer name
Tau Per
Flamsteed
18 Persei
Flamsteed name
18 Per
Distance
77.94
Distance ly
254.24
last precise pa
276
last precise sep
0.067
 
 
ORBITAL ELEMENTS
 
 
Period (P)4.149y Periastron (T)2013.888y Semi-major axis (a)0.055a
Eccentricity (e)0.728 Inclination (i)94.5° Longitude of periastron (ω)54.1°
Node (Ω)100.6° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1994
label rho theta
2000 0.035 270.0
2001 0.013 116.6
2002 0.054 279.7
2003 0.066 276.3
2004 0.041 271.5
2005 0.007 140.0
2006 0.045 280.6
2007 0.067 276.8
2008 0.046 272.6
2009 0.005 211.9
2010 0.032 282.0
2011 0.068 277.3
2012 0.051 273.5
2013 0.011 249.7
2014 0.012 287.0
2015 0.068 277.7
2016 0.055 274.2
2017 0.018 260.8
2018 0.014 98.5
2019 0.066 278.2
2020 0.059 274.9
2021 0.024 265.7
2022 0.021 104.4
2023 0.063 278.7
2024 0.062 275.5
2025 0.031 268.6
2026 0.017 110.0
2027 0.059 279.3
2028 0.065 276.0
2029 0.037 270.4
2030 0.011 120.7

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