15227-4441 COP 2 AB
15h 22m 40.89s -44° 41' 22.5" P.A. 24.00 sep 0.2 mag 3.56,5.04 Sp B2IV-V dist. 156.99 pc (512.1 l.y.)
Coord 2000 |
15227-4441 |
|
Discov num |
COP 2 |
|
Comp |
AB |
|
Coord arcsec 2000 |
15 22 40.89 -44 41 22.5 |
|
Date first |
1883 |
|
Date last |
2021 |
|
Obs |
47 |
|
Pa first |
285 |
|
Pa last |
23.9 |
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P.A. Now (θ) |
23.9° |
|
Sep first |
0.8 |
|
Sep last |
0.153 |
|
Sep. Now (ρ) |
0.153" |
|
Mag pri |
3.56 |
|
Mag sec |
5.04 |
|
delta mag (ΔM) |
1.48 |
|
Spectral class |
B2IV-V (blue-white) |
|
Pri motion ra |
-014 |
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Sec motion ra |
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Pri motion dec |
-018 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
15227-4441 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
225712 |
15 22 41 -44 41 22 |
RIZ 13 Aa,Ab |
2010 |
1 |
25 |
0.1 |
3.60 |
5.10 |
1.50 |
|
|
Show |
|
225712 |
15 22 41 -44 41 22 |
COP 2 AB |
2021 |
47 |
24 |
0.2 |
3.56 |
5.04 |
1.48 |
Y |
<=== |
Show |
Eps Lup |
225712 |
15 22 41 -44 41 22 |
DUN 182 AC |
2020 |
26 |
168 |
26.2 |
3.56 |
9.10 |
5.54 |
|
|
Show |
|
225712 |
15 22 41 -44 41 22 |
RIZ 13 AD |
2016 |
3 |
190 |
38.9 |
3.37 |
16.20 |
12.83 |
|
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Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Lupus |
|
SAO |
225712 |
|
HIP |
75264 |
|
Tycho2 |
7847-02505-1 |
|
Gaia DR2 |
6000130236633865856 |
|
HD |
136504 |
|
HR |
5708 |
|
GC |
20659 |
|
CD |
CD-4410066 |
|
CP |
CP-44 7342 |
|
Bayer |
Epsilon Lupi |
|
Bayer name |
Eps Lup |
|
Distance |
156.99 |
|
Distance ly |
512.1 |
|
Bayer greek |
ε Lup |
|
ORBITAL ELEMENTS
Period (P) | 736.69y | |
Periastron (T) | 2009.83y | |
Semi-major axis (a) | 1.409a | |
Eccentricity (e) | 0.808 | |
Inclination (i) | 117.6° | |
Longitude of periastron (ω) | 19.6° | |
Node (Ω) | 125.1° | |
Notes | n | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
148.7 |
0.284 |
2001 |
145.5 |
0.286 |
2002 |
142.3 |
0.287 |
2003 |
139.1 |
0.288 |
2004 |
135.9 |
0.288 |
2005 |
132.6 |
0.286 |
2006 |
129.4 |
0.283 |
2007 |
126.0 |
0.279 |
2008 |
122.6 |
0.273 |
2009 |
118.9 |
0.266 |
2010 |
115.1 |
0.257 |
2011 |
110.9 |
0.246 |
2012 |
106.3 |
0.235 |
2013 |
101.2 |
0.223 |
2014 |
95.6 |
0.210 |
2015 |
89.2 |
0.199 |
2016 |
82.1 |
0.188 |
2017 |
74.3 |
0.180 |
2018 |
65.8 |
0.174 |
2019 |
56.8 |
0.171 |
2020 |
47.7 |
0.171 |
2021 |
38.9 |
0.175 |
2022 |
30.6 |
0.183 |
2023 |
23.1 |
0.193 |
2024 |
16.4 |
0.206 |
2025 |
10.5 |
0.220 |
2026 |
5.4 |
0.236 |
2027 |
1.0 |
0.253 |
2028 |
357.1 |
0.271 |
2029 |
353.8 |
0.290 |
2030 |
350.8 |
0.309 |
|
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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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