04269-2405 BU 311 (HD 28312)
04h 26m 56.93s -24° 04' 52.8" P.A. 168.00 sep 0.4 mag 6.67,7.09 Sp A3V dist. 97.66 pc (318.57 l.y.)
| Coord 2000 |
04269-2405 |
|
Discov num |
BU 311 |
|
Comp |
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Coord arcsec 2000 |
04 26 56.93 -24 04 52.8 |
|
| Date first |
1874 |
|
Date last |
2021 |
|
Obs |
86 |
|
| Pa first |
340 |
|
Pa last |
167.9 |
|
P.A. Now (θ) |
167.9° |
|
| Sep first |
1.0 |
|
Sep last |
0.391 |
|
Sep. Now (ρ) |
0.391" |
|
| Mag pri |
6.67 |
|
Mag sec |
7.09 |
|
delta mag (ΔM) |
0.42 |
|
Spectral class |
A3V (white) |
|
| Pri motion ra |
-009 |
|
Sec motion ra |
-009 |
|
| Pri motion dec |
-019 |
|
Sec motion dec |
-019 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 28312 |
|
Constellation |
Eridanus |
|
SAO |
169455 |
|
HIP |
20765 |
|
| Tycho2 |
6457-03274-1 |
|
HD |
28312 |
|
HR |
1410 |
|
GC |
5409 |
|
| ADS |
3230 |
|
CD |
CD-24 2343 |
|
CP |
CP-24 613 |
|
Distance |
97.66 |
|
| Distance ly |
318.57 |
|
ORBITAL ELEMENTS
| Period (P) | 596.45y | |
Periastron (T) | 1980.98y | |
Semi-major axis (a) | 1.029a | |
| Eccentricity (e) | 0.532 | |
Inclination (i) | 62° | |
Longitude of periastron (ω) | 345° | |
| Node (Ω) | 124.3° | |
Notes | | |
Reference | Sca2003b | |
| Equinox | 2000 | |
Last observation | 1999 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
137.6 |
0.485 |
| 2001 |
138.7 |
0.483 |
| 2002 |
139.8 |
0.480 |
| 2003 |
140.9 |
0.478 |
| 2004 |
142.0 |
0.475 |
| 2005 |
143.1 |
0.473 |
| 2006 |
144.3 |
0.470 |
| 2007 |
145.4 |
0.466 |
| 2008 |
146.6 |
0.463 |
| 2009 |
147.8 |
0.460 |
| 2010 |
149.0 |
0.457 |
| 2011 |
150.2 |
0.453 |
| 2012 |
151.5 |
0.449 |
| 2013 |
152.7 |
0.446 |
| 2014 |
154.0 |
0.442 |
| 2015 |
155.3 |
0.439 |
| 2016 |
156.7 |
0.435 |
| 2017 |
158.0 |
0.431 |
| 2018 |
159.4 |
0.428 |
| 2019 |
160.8 |
0.424 |
| 2020 |
162.2 |
0.421 |
| 2021 |
163.7 |
0.417 |
| 2022 |
165.1 |
0.414 |
| 2023 |
166.6 |
0.411 |
| 2024 |
168.1 |
0.408 |
| 2025 |
169.7 |
0.405 |
| 2026 |
171.3 |
0.402 |
| 2027 |
172.8 |
0.399 |
| 2028 |
174.4 |
0.397 |
| 2029 |
176.1 |
0.394 |
| 2030 |
177.7 |
0.392 |
|
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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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