04153-0739 STF 518 BC
04h 15m 21.79s -07° 39' 29.1" P.A. 327.00 sep 7.7 mag 9.53,11.17 Sp DA2.9+M5V
| Coord 2000 |
04153-0739 |
|
Discov num |
STF 518 |
|
Comp |
BC |
|
Coord arcsec 2000 |
04 15 21.79 -07 39 29.1 |
|
| Date first |
1851 |
|
Date last |
2024 |
|
Obs |
192 |
|
| Pa first |
160 |
|
Pa last |
326.8 |
|
P.A. Now (θ) |
328.6° |
|
| Sep first |
3.0 |
|
Sep last |
7.72 |
|
Sep. Now (ρ) |
7.776" |
|
| Mag pri |
9.53 |
|
Mag sec |
11.17 |
|
delta mag (ΔM) |
1.64 |
|
Spectral class |
DA2.9+M5V (white dwarf/red) |
|
| Pri motion ra |
-224 |
|
Sec motion ra |
-225 |
|
| Pri motion dec |
-334 |
|
Sec motion dec |
-341 |
|
| Notes |
N
O
P
(See Notes, Orbital solution, 100-year proper motion) |
|
rPM=0.017 (< 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 |
2024 |
108 |
102 |
83.2 |
4.43 |
9.31 |
4.88 |
|
|
| Show |
|
131063 |
04 15 16 -07 39 10 |
STF 518 AC |
2024 |
9 |
98 |
77.9 |
4.43 |
11.17 |
6.74 |
|
|
| Show |
|
131063 |
04 15 16 -07 39 10 |
STF 518 AD |
2016 |
18 |
37 |
551.0 |
4.43 |
12.62 |
8.19 |
|
|
| Show |
|
131063 |
04 15 16 -07 39 10 |
STF 518 AE |
1998 |
12 |
25 |
639.0 |
4.43 |
12.99 |
8.56 |
|
|
| Show |
|
|
04 15 22 -07 39 29 |
STF 518 BC |
2024 |
192 |
327 |
7.7 |
9.53 |
11.17 |
1.64 |
Y |
<=== |
| Show |
|
|
04 15 22 -07 39 29 |
STF 518 BD |
2016 |
6 |
29 |
521.0 |
9.53 |
12.62 |
3.09 |
|
|
| Show |
|
|
04 15 22 -07 39 29 |
STF 518 BE |
2016 |
6 |
18 |
625.4 |
9.53 |
12.99 |
3.46 |
|
|
Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Eridanus |
|
SAO |
131065 |
|
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 |
| 2031 |
326.4 |
7.205 |
| 2032 |
326.0 |
7.097 |
| 2033 |
325.6 |
6.985 |
| 2034 |
325.2 |
6.870 |
| 2035 |
324.7 |
6.750 |
| 2036 |
324.3 |
6.627 |
| 2037 |
323.8 |
6.500 |
| 2038 |
323.3 |
6.369 |
| 2039 |
322.8 |
6.233 |
| 2040 |
322.2 |
6.094 |
| 2041 |
321.7 |
5.951 |
| 2042 |
321.1 |
5.804 |
| 2043 |
320.4 |
5.653 |
| 2044 |
319.8 |
5.498 |
| 2045 |
319.1 |
5.338 |
| 2046 |
318.3 |
5.175 |
| 2047 |
317.5 |
5.008 |
| 2048 |
316.7 |
4.838 |
| 2049 |
315.8 |
4.663 |
| 2050 |
314.8 |
4.485 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
