03160-0555 BU 84 (NSV1090)
03h 16m 00.86s -05° 55' 07.3" P.A. 7.00 sep 1.0 mag 6.38,7.93 Sp B9V dist. 201.61 pc (657.65 l.y.)
Coord 2000 |
03160-0555 |
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Discov num |
BU 84 |
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Comp |
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Coord arcsec 2000 |
03 16 00.86 -05 55 07.3 |
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Date first |
1872 |
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Date last |
2012 |
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Obs |
60 |
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Pa first |
20 |
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Pa last |
7.1 |
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P.A. Now (θ) |
7.1° |
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Sep first |
0.5 |
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Sep last |
0.956 |
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Sep. Now (ρ) |
0.956" |
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Mag pri |
6.38 |
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Mag sec |
7.93 |
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delta mag (ΔM) |
1.55 |
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Spectral class |
B9V (blue-white) |
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Pri motion ra |
+008 |
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Sec motion ra |
+008 |
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Pri motion dec |
-008 |
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Sec motion dec |
-008 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Var name |
NSV1090 |
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Constellation |
Eridanus |
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SAO |
130388 |
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HIP |
15203 |
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Tycho2 |
4714-01219-1 |
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Gaia DR2 |
5181583893199538048 |
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HD |
20319 |
|
HR |
983 |
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GC |
3907 |
|
ADS |
2440 |
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BD |
BD-06 636 |
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Distance |
201.61 |
|
Distance ly |
657.65 |
|
ORBITAL ELEMENTS
Period (P) | 1129.394y | ± 544.4601 |
Periastron (T) | 2086.0595y | ± 42.4277 |
Semi-major axis (a) | 2.20836a | ± 1.30436 |
Eccentricity (e) | 0.76942 | ± 0.21029 |
Inclination (i) | 97.332° | ± 6.969 |
Longitude of periastron (ω) | 252.208° | ± 22.395 |
Node (Ω) | 179.628° | ± 4.846 |
Notes | | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
8.9 |
0.991 |
2001 |
8.7 |
0.991 |
2002 |
8.6 |
0.992 |
2003 |
8.5 |
0.992 |
2004 |
8.3 |
0.993 |
2005 |
8.2 |
0.993 |
2006 |
8.1 |
0.993 |
2007 |
8.0 |
0.994 |
2008 |
7.8 |
0.994 |
2009 |
7.7 |
0.994 |
2010 |
7.6 |
0.993 |
2011 |
7.4 |
0.993 |
2012 |
7.3 |
0.993 |
2013 |
7.2 |
0.992 |
2014 |
7.1 |
0.992 |
2015 |
6.9 |
0.991 |
2016 |
6.8 |
0.990 |
2017 |
6.7 |
0.989 |
2018 |
6.5 |
0.988 |
2019 |
6.4 |
0.987 |
2020 |
6.3 |
0.986 |
2021 |
6.2 |
0.984 |
2022 |
6.0 |
0.983 |
2023 |
5.9 |
0.981 |
2024 |
5.8 |
0.979 |
2025 |
5.6 |
0.977 |
2026 |
5.5 |
0.975 |
2027 |
5.4 |
0.972 |
2028 |
5.2 |
0.970 |
2029 |
5.1 |
0.967 |
2030 |
5.0 |
0.964 |
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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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