02374-5233 TOK 186 Aa,Ab
02h 37m 24.26s -52° 32' 35.1" P.A. 69.00 sep 0.1 mag 5.50,6.50 Sp A6V dist. 45.56 pc (148.62 l.y.)
Coord 2000 |
02374-5233 |
|
Discov num |
TOK 186 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
02 37 24.26 -52 32 35.1 |
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Date first |
2011 |
|
Date last |
2021 |
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Obs |
26 |
|
Pa first |
60 |
|
Pa last |
69 |
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P.A. Now (θ) |
351.5° |
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Sep first |
0.1 |
|
Sep last |
0.069 |
|
Sep. Now (ρ) |
0.041" |
|
Mag pri |
5.50 |
|
Mag sec |
6.50 |
|
delta mag (ΔM) |
1 |
|
Spectral class |
A6V (white) |
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Pri motion ra |
+111 |
|
Sec motion ra |
|
|
Pri motion dec |
+001 |
|
Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
02374-5233 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
232835 |
02 37 24 -52 32 35 |
TOK 186 Aa,Ab |
2021 |
26 |
69 |
0.1 |
5.50 |
6.50 |
1.00 |
Y |
<=== |
Show |
Eta Hor |
232835 |
02 37 24 -52 32 35 |
EHR 2 AB |
2008 |
3 |
232 |
4.9 |
4.50 |
14.00 |
9.50 |
|
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Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Horologium |
|
SAO |
232835 |
|
HIP |
12225 |
|
Tycho2 |
8484-01504-1 |
|
Gaia DR2 |
4745123853382686336 |
|
HD |
16555 |
|
HR |
778 |
|
GC |
3166 |
|
CP |
CP-53 457 |
|
Bayer |
Eta Horologii |
|
Bayer name |
Eta Hor |
|
FK5 |
2182 |
|
Distance |
45.56 |
|
Distance ly |
148.62 |
|
Bayer greek |
η Hor |
|
ORBITAL ELEMENTS
Period (P) | 3.171y | |
Periastron (T) | 2011.523y | |
Semi-major axis (a) | 0.079a | |
Eccentricity (e) | 0.065 | |
Inclination (i) | 116.5° | |
Longitude of periastron (ω) | 38° | |
Node (Ω) | 232.6° | |
Notes | n | |
Reference | Tok2017c | |
Equinox | 2000 | |
Last observation | 2017 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
54.8 |
0.082 |
2001 |
307.6 |
0.037 |
2002 |
214.2 |
0.062 |
2003 |
63.3 |
0.076 |
2004 |
346.4 |
0.040 |
2005 |
226.0 |
0.072 |
2006 |
74.2 |
0.064 |
2007 |
13.3 |
0.052 |
2008 |
235.8 |
0.075 |
2009 |
91.6 |
0.048 |
2010 |
29.1 |
0.066 |
2011 |
246.0 |
0.070 |
2012 |
124.1 |
0.035 |
2013 |
39.7 |
0.077 |
2014 |
259.1 |
0.058 |
2015 |
169.4 |
0.037 |
2016 |
48.1 |
0.082 |
2017 |
279.7 |
0.045 |
2018 |
199.6 |
0.050 |
2019 |
56.0 |
0.082 |
2020 |
313.6 |
0.037 |
2021 |
216.2 |
0.064 |
2022 |
64.7 |
0.075 |
2023 |
351.5 |
0.041 |
2024 |
227.5 |
0.073 |
2025 |
76.3 |
0.062 |
2026 |
16.2 |
0.054 |
2027 |
237.2 |
0.074 |
2028 |
95.3 |
0.046 |
2029 |
31.0 |
0.068 |
2030 |
247.7 |
0.068 |
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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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