03121-2859 HJ 3555 (Dalim)
03h 12m 04.53s -28° 59' 15.4" P.A. 301.00 sep 5.4 mag 3.98,7.19 Sp F8V dist. 14.24 pc (46.45 l.y.)
| Coord 2000 |
03121-2859 |
|
Discov num |
HJ 3555 |
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Comp |
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Coord arcsec 2000 |
03 12 04.53 -28 59 15.4 |
|
| Date first |
1835 |
|
Date last |
2017 |
|
Obs |
102 |
|
| Pa first |
306 |
|
Pa last |
301.1 |
|
P.A. Now (θ) |
301.1° |
|
| Sep first |
3.0 |
|
Sep last |
5.369 |
|
Sep. Now (ρ) |
5.369" |
|
| Mag pri |
3.98 |
|
Mag sec |
7.19 |
|
delta mag (ΔM) |
3.21 |
|
Spectral class |
F8V (yellow-white) |
|
| Pri motion ra |
+369 |
|
Sec motion ra |
+346 |
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| Pri motion dec |
+617 |
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Sec motion dec |
+648 |
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| Notes |
N
O
(See Notes, Orbital solution) |
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rPM=0.053 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Dalim |
|
Var name |
NSV1074 For |
|
Constellation |
Fornax |
|
SAO |
168373 |
|
| HIP |
14879 |
|
Tycho2 |
6445-00990-1 |
|
HD |
20010 |
|
HR |
963 |
|
| GC |
3831 |
|
ADS |
2402 |
|
GL |
Gl 127A |
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CD |
CD-29 1177 |
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| CP |
CP-29 362 |
|
Bayer |
Alpha Eridani |
|
Bayer name |
Alp Eri |
|
Flamsteed |
12 Eridani |
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| Flamsteed name |
12 Eri |
|
Distance |
14.24 |
|
Distance ly |
46.45 |
|
Bayer greek |
α Eri |
|
| Other names |
Fornacis, 12 Eridani, 12 Eri |
|
Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Eri vs For)
ORBITAL ELEMENTS
| Period (P) | 268.212y | ± 8.7169 |
Periastron (T) | 1947.4113y | ± 0.2932 |
Semi-major axis (a) | 3.96341a | ± 0.06153 |
| Eccentricity (e) | 0.73704 | ± 0.00824 |
Inclination (i) | 81.484° | ± 0.533 |
Longitude of periastron (ω) | 43.023° | ± 1.027 |
| Node (Ω) | 117.397° | ± 0.323 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2013 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
299.3 |
4.855 |
| 2001 |
299.4 |
4.893 |
| 2002 |
299.5 |
4.930 |
| 2003 |
299.6 |
4.966 |
| 2004 |
299.6 |
5.001 |
| 2005 |
299.7 |
5.035 |
| 2006 |
299.8 |
5.067 |
| 2007 |
299.9 |
5.098 |
| 2008 |
300.0 |
5.128 |
| 2009 |
300.1 |
5.157 |
| 2010 |
300.1 |
5.185 |
| 2011 |
300.2 |
5.211 |
| 2012 |
300.3 |
5.237 |
| 2013 |
300.4 |
5.262 |
| 2014 |
300.4 |
5.285 |
| 2015 |
300.5 |
5.308 |
| 2016 |
300.6 |
5.329 |
| 2017 |
300.7 |
5.350 |
| 2018 |
300.7 |
5.369 |
| 2019 |
300.8 |
5.388 |
| 2020 |
300.9 |
5.405 |
| 2021 |
301.0 |
5.422 |
| 2022 |
301.0 |
5.438 |
| 2023 |
301.1 |
5.453 |
| 2024 |
301.2 |
5.467 |
| 2025 |
301.2 |
5.480 |
| 2026 |
301.3 |
5.493 |
| 2027 |
301.4 |
5.504 |
| 2028 |
301.5 |
5.515 |
| 2029 |
301.5 |
5.525 |
| 2030 |
301.6 |
5.534 |
|
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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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