04153-0739 STF 518 BC
04h 15m 21.79s -07° 39' 29.1" P.A. 330.00 sep 8.2 mag 9.53,11.17 Sp DA2.9+M5V
Coord 2000 |
04153-0739 |
|
Discov num |
STF 518 |
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Comp |
BC |
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Coord arcsec 2000 |
04 15 21.79 -07 39 29.1 |
|
Date first |
1851 |
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Date last |
2019 |
|
Obs |
184 |
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Pa first |
160 |
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Pa last |
330.4 |
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P.A. Now (θ) |
329.3° |
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Sep first |
3.0 |
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Sep last |
8.172 |
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Sep. Now (ρ) |
7.938" |
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Mag pri |
9.53 |
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Mag sec |
11.17 |
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delta mag (ΔM) |
1.64 |
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Spectral class |
DA2.9+M5V (white dwarf/red) |
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Pri motion ra |
-223 |
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Sec motion ra |
-225 |
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Pri motion dec |
-338 |
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Sec motion dec |
-341 |
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Notes |
N
O
P
(See Notes, Orbital solution, 100-year proper motion) |
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rPM=0.009 (< 0.3, Physical double)
This double is physical.
04153-0739 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
Keid |
131063 |
04 15 16 -07 39 10 |
STF 518 A,BC |
2019 |
107 |
102 |
82.7 |
4.43 |
9.31 |
4.88 |
|
|
Show |
|
131063 |
04 15 16 -07 39 10 |
STF 518 AC |
2019 |
8 |
97 |
77.5 |
4.43 |
11.17 |
6.74 |
|
|
Show |
|
131063 |
04 15 16 -07 39 10 |
STF 518 AD |
1998 |
17 |
38 |
481.4 |
4.43 |
12.62 |
8.19 |
|
|
Show |
|
131063 |
04 15 16 -07 39 10 |
STF 518 AE |
1998 |
11 |
24 |
569.9 |
4.43 |
12.99 |
8.56 |
|
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Show |
|
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04 15 22 -07 39 29 |
STF 518 BC |
2019 |
184 |
330 |
8.2 |
9.53 |
11.17 |
1.64 |
Y |
<=== |
Show |
|
|
04 15 22 -07 39 29 |
STF 518 BD |
2014 |
4 |
28 |
456.3 |
9.53 |
12.62 |
3.09 |
|
|
Show |
|
|
04 15 22 -07 39 29 |
STF 518 BE |
2014 |
4 |
16 |
563.4 |
9.53 |
12.99 |
3.46 |
|
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Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Eridanus |
|
Tycho2 |
5313-00183-1 |
|
HD |
26976 |
|
GC |
5140 |
|
ADS |
3093 |
|
Bayer |
Omicron 2 Eridani |
|
Bayer name |
Omi2 Eri |
|
Flamsteed |
40 Eridani |
|
Flamsteed name |
40 Eri |
|
Bayer greek |
ο2 Eri |
|
ORBITAL ELEMENTS
Period (P) | 233.2y | ± 0.65 |
Periastron (T) | 1848.78888y | ± 1.28888 |
Semi-major axis (a) | 6.88788a | ± 0.03488 |
Eccentricity (e) | 0.4141 | ± 0.0072 |
Inclination (i) | 107.98° | ± 0.36 |
Longitude of periastron (ω) | 321.2° | ± 1.3 |
Node (Ω) | 151.58° | ± 0.2 |
Notes | n | |
Reference | WSI2021 | |
Equinox | | |
Last observation | 2019 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
335.8 |
8.893 |
2001 |
335.5 |
8.883 |
2002 |
335.3 |
8.870 |
2003 |
335.0 |
8.855 |
2004 |
334.7 |
8.837 |
2005 |
334.5 |
8.816 |
2006 |
334.2 |
8.793 |
2007 |
333.9 |
8.766 |
2008 |
333.7 |
8.737 |
2009 |
333.4 |
8.705 |
2010 |
333.1 |
8.670 |
2011 |
332.8 |
8.633 |
2012 |
332.6 |
8.592 |
2013 |
332.3 |
8.548 |
2014 |
332.0 |
8.502 |
2015 |
331.7 |
8.452 |
2016 |
331.4 |
8.399 |
2017 |
331.1 |
8.343 |
2018 |
330.8 |
8.283 |
2019 |
330.5 |
8.221 |
2020 |
330.2 |
8.155 |
2021 |
329.9 |
8.086 |
2022 |
329.6 |
8.014 |
2023 |
329.3 |
7.938 |
2024 |
328.9 |
7.859 |
2025 |
328.6 |
7.776 |
2026 |
328.3 |
7.690 |
2027 |
327.9 |
7.600 |
2028 |
327.6 |
7.507 |
2029 |
327.2 |
7.410 |
2030 |
326.8 |
7.310 |
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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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