03184-2231 SEE 23 (15 Eri)
03h 18m 22.10s -22° 30' 40.1" P.A. 127.00 sep 0.1 mag 6.57,5.32 Sp G8IV dist. 78.31 pc (255.45 l.y.)
| Coord 2000 |
03184-2231 |
|
Discov num |
SEE 23 |
|
Comp |
|
|
Coord arcsec 2000 |
03 18 22.10 -22 30 40.1 |
|
| Date first |
1897 |
|
Date last |
2021 |
|
Obs |
64 |
|
| Pa first |
110 |
|
Pa last |
126.6 |
|
P.A. Now (θ) |
306.7° |
|
| Sep first |
0.3 |
|
Sep last |
0.149 |
|
Sep. Now (ρ) |
0.205" |
|
| Mag pri |
6.57 |
|
Mag sec |
5.32 |
|
delta mag (ΔM) |
1.25 |
|
Spectral class |
G8IV (yellow) |
|
| Pri motion ra |
+013 |
|
Sec motion ra |
|
|
| Pri motion dec |
+019 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
15 Eri |
|
Constellation |
Eridanus |
|
SAO |
168452 |
|
HIP |
15382 |
|
| Tycho2 |
6439-01171-1 |
|
Gaia DR2 |
5099265828450228864 |
|
HD |
20610 |
|
HR |
994 |
|
| GC |
3955 |
|
ADS |
2463 |
|
CD |
CD-22 1146 |
|
CP |
CP-22 349 |
|
| Flamsteed |
15 Eridani |
|
Flamsteed name |
15 Eri |
|
Distance |
78.31 |
|
Distance ly |
255.45 |
|
ORBITAL ELEMENTS
| Period (P) | 118.16y | |
Periastron (T) | 1934.24y | |
Semi-major axis (a) | 0.34a | |
| Eccentricity (e) | 0.03 | |
Inclination (i) | 66.6° | |
Longitude of periastron (ω) | 333.5° | |
| Node (Ω) | 91.6° | |
Notes | n | |
Reference | Msn2017a | |
| Equinox | 2000 | |
Last observation | 2016 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
268.7 |
0.347 |
| 2001 |
269.8 |
0.349 |
| 2002 |
271.0 |
0.349 |
| 2003 |
272.1 |
0.349 |
| 2004 |
273.3 |
0.348 |
| 2005 |
274.4 |
0.346 |
| 2006 |
275.6 |
0.344 |
| 2007 |
276.8 |
0.340 |
| 2008 |
278.0 |
0.336 |
| 2009 |
279.3 |
0.332 |
| 2010 |
280.6 |
0.326 |
| 2011 |
281.9 |
0.320 |
| 2012 |
283.3 |
0.313 |
| 2013 |
284.8 |
0.305 |
| 2014 |
286.3 |
0.297 |
| 2015 |
288.0 |
0.289 |
| 2016 |
289.7 |
0.279 |
| 2017 |
291.5 |
0.270 |
| 2018 |
293.5 |
0.260 |
| 2019 |
295.7 |
0.249 |
| 2020 |
298.1 |
0.238 |
| 2021 |
300.6 |
0.227 |
| 2022 |
303.5 |
0.216 |
| 2023 |
306.7 |
0.205 |
| 2024 |
310.2 |
0.194 |
| 2025 |
314.1 |
0.183 |
| 2026 |
318.6 |
0.172 |
| 2027 |
323.6 |
0.163 |
| 2028 |
329.1 |
0.154 |
| 2029 |
335.3 |
0.146 |
| 2030 |
342.2 |
0.140 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
