02442+4914 STF 296 AB (The Per)
02h 44m 11.99s +49° 13' 42.4" P.A. 306.00 sep 21.2 mag 4.16,10.00 Sp F7V+M1.5 dist. 11.13 pc (36.31 l.y.)
Coord 2000 |
02442+4914 |
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Discov num |
STF 296 |
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Comp |
AB |
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Coord arcsec 2000 |
02 44 11.99 +49 13 42.4 |
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Date first |
1782 |
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Date last |
2020 |
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Obs |
85 |
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Pa first |
290 |
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Pa last |
306.1 |
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P.A. Now (θ) |
306.1° |
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Sep first |
13.5 |
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Sep last |
21.15 |
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Sep. Now (ρ) |
21.15" |
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Mag pri |
4.16 |
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Mag sec |
10.00 |
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delta mag (ΔM) |
5.84 |
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Spectral class |
F7V+M1.5 (yellow-white/red) |
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Pri motion ra |
+335 |
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Sec motion ra |
+336 |
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Pri motion dec |
-090 |
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Sec motion dec |
-084 |
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Notes |
N
O
V
(See Notes, Orbital solution, Proper motion indicates physical) |
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rPM=0.018 (< 0.3, Physical double)
This double is physical.
02442+4914 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
The Per |
38288 |
02 44 12 +49 13 42 |
STF 296 AB |
2020 |
85 |
306 |
21.2 |
4.16 |
10.00 |
5.84 |
Y |
<=== |
Show |
|
38288 |
02 44 12 +49 13 42 |
STF 296 AC |
2002 |
17 |
244 |
94.8 |
4.16 |
11.08 |
6.92 |
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Show |
|
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02 44 10 +49 13 54 |
STF 296 BC |
2007 |
13 |
232 |
88.2 |
10.00 |
11.08 |
1.08 |
|
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Show |
|
|
02 44 10 +49 13 54 |
TNN 4 BD |
2004 |
1 |
161 |
6.2 |
5.87 |
17.70 |
11.83 |
|
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Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
The Per |
|
Var name |
NSV902 Per |
|
Constellation |
Perseus |
|
SAO |
38288 |
|
HIP |
12777 |
|
Tycho2 |
3304-02737-1 |
|
HD |
16895 |
|
HR |
799 |
|
GC |
3277 |
|
ADS |
2081 |
|
GL |
Gl 107A |
|
BD |
BD+48 746 |
|
Bayer |
Theta Persei |
|
Bayer name |
The Per |
|
Flamsteed |
13 Persei |
|
Flamsteed name |
13 Per |
|
FK5 |
93 |
|
Distance |
11.13 |
|
Distance ly |
36.31 |
|
Bayer greek |
θ Per |
|
ORBITAL ELEMENTS
Period (P) | 2720y | |
Periastron (T) | 1613y | |
Semi-major axis (a) | 22.289a | |
Eccentricity (e) | 0.13 | |
Inclination (i) | 75.44° | |
Longitude of periastron (ω) | 100.64° | |
Node (Ω) | 128° | |
Notes | n | |
Reference | KSC2017 | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
304.1 |
20.042 |
2001 |
304.1 |
20.062 |
2002 |
304.1 |
20.081 |
2003 |
304.2 |
20.100 |
2004 |
304.2 |
20.119 |
2005 |
304.3 |
20.138 |
2006 |
304.3 |
20.157 |
2007 |
304.3 |
20.175 |
2008 |
304.4 |
20.194 |
2009 |
304.4 |
20.212 |
2010 |
304.5 |
20.230 |
2011 |
304.5 |
20.249 |
2012 |
304.5 |
20.267 |
2013 |
304.6 |
20.284 |
2014 |
304.6 |
20.302 |
2015 |
304.7 |
20.320 |
2016 |
304.7 |
20.337 |
2017 |
304.7 |
20.355 |
2018 |
304.8 |
20.372 |
2019 |
304.8 |
20.389 |
2020 |
304.9 |
20.406 |
2021 |
304.9 |
20.423 |
2022 |
304.9 |
20.440 |
2023 |
305.0 |
20.457 |
2024 |
305.0 |
20.473 |
2025 |
305.1 |
20.490 |
2026 |
305.1 |
20.506 |
2027 |
305.1 |
20.522 |
2028 |
305.2 |
20.538 |
2029 |
305.2 |
20.554 |
2030 |
305.3 |
20.570 |
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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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