02543+5246 LAB 1 Aa,Ab
02h 54m 15.46s +52° 45' 45.0" P.A. 277.00 sep 0.1 mag 4.20,5.90 Sp G8III+A7V dist. 77.94 pc (254.24 l.y.)
Coord 2000 |
02543+5246 |
|
Discov num |
LAB 1 |
|
Comp |
Aa,Ab |
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Coord arcsec 2000 |
02 54 15.46 +52 45 45.0 |
|
Date first |
1973 |
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Date last |
2010 |
|
Obs |
13 |
|
Pa first |
274 |
|
Pa last |
277.3 |
|
P.A. Now (θ) |
278.7° |
|
Sep first |
0.1 |
|
Sep last |
0.058 |
|
Sep. Now (ρ) |
0.063" |
|
Mag pri |
4.20 |
|
Mag sec |
5.90 |
|
delta mag (ΔM) |
1.7 |
|
Spectral class |
G8III+A7V (yellow/white) |
|
Pri motion ra |
-003 |
|
Sec motion ra |
|
|
Pri motion dec |
-005 |
|
Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
02543+5246 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
23685 |
02 54 15 +52 45 45 |
LAB 1 Aa,Ab |
2010 |
13 |
277 |
0.1 |
4.20 |
5.90 |
1.70 |
Y |
<=== |
Show |
Tau Per |
23685 |
02 54 15 +52 45 45 |
EDG 1 AB |
2015 |
9 |
107 |
51.0 |
3.95 |
12.28 |
8.33 |
|
|
Show |
|
23685 |
02 54 15 +52 45 45 |
BU 1376 AC |
2014 |
5 |
107 |
50.9 |
3.95 |
12.70 |
8.75 |
|
|
Show |
|
23685 |
02 54 15 +52 45 45 |
BU 1376 AD |
2015 |
4 |
338 |
41.9 |
3.95 |
11.50 |
7.55 |
|
|
Show |
|
|
02 54 21 +52 45 30 |
BU 1376 BC |
2009 |
7 |
86 |
4.2 |
12.28 |
12.70 |
0.42 |
|
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Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Perseus |
|
SAO |
23685 |
|
HIP |
13531 |
|
Tycho2 |
3701-01394-1 |
|
Gaia DR2 |
441161693272720640 |
|
HD |
17879 |
|
HR |
854 |
|
GC |
3462 |
|
ADS |
2202 |
|
BD |
BD+52 641 |
|
Bayer |
Tau Persei |
|
Bayer name |
Tau Per |
|
Flamsteed |
18 Persei |
|
Flamsteed name |
18 Per |
|
FK5 |
103 |
|
Distance |
77.94 |
|
Distance ly |
254.24 |
|
Bayer greek |
τ Per |
|
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° | |
Notes | n | |
Reference | Doc2014f | |
Equinox | 2000 | |
Last observation | 1994 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
270.0 |
0.035 |
2001 |
116.6 |
0.013 |
2002 |
279.7 |
0.054 |
2003 |
276.3 |
0.066 |
2004 |
271.5 |
0.041 |
2005 |
140.0 |
0.007 |
2006 |
280.6 |
0.045 |
2007 |
276.8 |
0.067 |
2008 |
272.6 |
0.046 |
2009 |
211.9 |
0.005 |
2010 |
282.0 |
0.032 |
2011 |
277.3 |
0.068 |
2012 |
273.5 |
0.051 |
2013 |
249.7 |
0.011 |
2014 |
287.0 |
0.012 |
2015 |
277.7 |
0.068 |
2016 |
274.2 |
0.055 |
2017 |
260.8 |
0.018 |
2018 |
98.5 |
0.014 |
2019 |
278.2 |
0.066 |
2020 |
274.9 |
0.059 |
2021 |
265.7 |
0.024 |
2022 |
104.4 |
0.021 |
2023 |
278.7 |
0.063 |
2024 |
275.5 |
0.062 |
2025 |
268.6 |
0.031 |
2026 |
110.0 |
0.017 |
2027 |
279.3 |
0.059 |
2028 |
276.0 |
0.065 |
2029 |
270.4 |
0.037 |
2030 |
120.7 |
0.011 |
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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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