04215-2544 BU 744 AB
04h 21m 31.29s -25° 43' 42.4" P.A. 243.00 sep 0.5 mag 7.26,6.56 Sp F2V dist. 58.75 pc (191.64 l.y.)
| Coord 2000 |
04215-2544 |
|
Discov num |
BU 744 |
|
Comp |
AB |
|
Coord arcsec 2000 |
04 21 31.29 -25 43 42.4 |
|
| Date first |
1879 |
|
Date last |
2021 |
|
Obs |
106 |
|
| Pa first |
290 |
|
Pa last |
242.8 |
|
P.A. Now (θ) |
246.3° |
|
| Sep first |
0.6 |
|
Sep last |
0.479 |
|
Sep. Now (ρ) |
0.5" |
|
| Mag pri |
7.26 |
|
Mag sec |
6.56 |
|
delta mag (ΔM) |
0.7 |
|
Spectral class |
F2V (yellow-white) |
|
| Pri motion ra |
+048 |
|
Sec motion ra |
+048 |
|
| Pri motion dec |
-053 |
|
Sec motion dec |
-053 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
04215-2544 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
169368 |
04 21 31 -25 43 42 |
BU 744 AB |
2021 |
106 |
243 |
0.5 |
7.26 |
6.56 |
0.70 |
Y |
<=== |
| Show |
|
169368 |
04 21 31 -25 43 42 |
HJ 3644 AB,C |
2015 |
8 |
1 |
41.1 |
6.15 |
12.80 |
6.65 |
|
|
| Show |
NSV1574 |
169368 |
04 21 31 -25 43 42 |
HJ 3644 AB,D |
2020 |
22 |
41 |
43.7 |
6.15 |
8.23 |
2.08 |
|
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Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
NSV1574 |
|
Constellation |
Eridanus |
|
SAO |
169368 |
|
HIP |
20347 |
|
| Tycho2 |
6460-03129-1 |
|
HD |
27710 |
|
HR |
1374 |
|
GC |
5290 |
|
| ADS |
3159 |
|
CD |
CD-26 1642 |
|
CP |
CP-26 520 |
|
Distance |
58.75 |
|
| Distance ly |
191.64 |
|
ORBITAL ELEMENTS
| Period (P) | 81.025y | |
Periastron (T) | 1924.014y | |
Semi-major axis (a) | 0.48a | |
| Eccentricity (e) | 0.59 | |
Inclination (i) | 32.65° | |
Longitude of periastron (ω) | 110.93° | |
| Node (Ω) | 356.65° | |
Notes | n | |
Reference | Sca1991c | |
| Equinox | 2000 | |
Last observation | 1989 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
22.2 |
0.277 |
| 2001 |
32.4 |
0.245 |
| 2002 |
45.8 |
0.213 |
| 2003 |
63.4 |
0.186 |
| 2004 |
85.6 |
0.170 |
| 2005 |
110.1 |
0.170 |
| 2006 |
132.7 |
0.184 |
| 2007 |
151.0 |
0.207 |
| 2008 |
165.4 |
0.233 |
| 2009 |
177.0 |
0.259 |
| 2010 |
186.4 |
0.284 |
| 2011 |
194.4 |
0.307 |
| 2012 |
201.3 |
0.328 |
| 2013 |
207.4 |
0.348 |
| 2014 |
212.8 |
0.367 |
| 2015 |
217.8 |
0.385 |
| 2016 |
222.3 |
0.401 |
| 2017 |
226.4 |
0.417 |
| 2018 |
230.3 |
0.433 |
| 2019 |
233.9 |
0.447 |
| 2020 |
237.2 |
0.461 |
| 2021 |
240.4 |
0.475 |
| 2022 |
243.4 |
0.487 |
| 2023 |
246.3 |
0.500 |
| 2024 |
249.0 |
0.511 |
| 2025 |
251.6 |
0.523 |
| 2026 |
254.1 |
0.534 |
| 2027 |
256.5 |
0.544 |
| 2028 |
258.8 |
0.554 |
| 2029 |
261.0 |
0.564 |
| 2030 |
263.2 |
0.573 |
|
|
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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