00310-1005 BU 1158 BC
00h 31m 05.23s -10° 05' 01.9" P.A. 324.00 sep 0.5 mag 9.69,9.09 Sp G1V dist. 80 pc (260.96 l.y.)
| Coord 2000 |
00310-1005 |
|
Discov num |
BU 1158 |
|
Comp |
BC |
|
Coord arcsec 2000 |
00 31 05.23 -10 05 01.9 |
|
| Date first |
1890 |
|
Date last |
2017 |
|
Obs |
36 |
|
| Pa first |
138 |
|
Pa last |
323.6 |
|
P.A. Now (θ) |
323.6° |
|
| Sep first |
0.3 |
|
Sep last |
0.465 |
|
Sep. Now (ρ) |
0.465" |
|
| Mag pri |
9.69 |
|
Mag sec |
9.09 |
|
delta mag (ΔM) |
0.6 |
|
Spectral class |
G1V (yellow) |
|
| Pri motion ra |
-025 |
|
Sec motion ra |
|
|
| Pri motion dec |
-037 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
00310-1005 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 2760 |
147317 |
00 30 60 -10 05 05 |
HJ 1981 A,BC |
2015 |
27 |
89 |
78.4 |
6.91 |
8.43 |
1.52 |
|
|
| Show |
|
147318 |
00 31 05 -10 05 02 |
BU 1158 BC |
2017 |
36 |
324 |
0.5 |
9.69 |
9.09 |
0.60 |
Y |
<=== |
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cetus |
|
SAO |
147318 |
|
HIP |
2444 |
|
Tycho2 |
5269-02011-1 |
|
| Gaia DR2 |
2426456862096115584 |
|
HD |
2761 |
|
GC |
610 |
|
ADS |
426 |
|
| BD |
BD-10 90 |
|
Distance |
80 |
|
Distance ly |
260.96 |
|
ORBITAL ELEMENTS
| Period (P) | 423.4y | |
Periastron (T) | 1939.8y | |
Semi-major axis (a) | 0.897a | |
| Eccentricity (e) | 0.359 | |
Inclination (i) | 74.5° | |
Longitude of periastron (ω) | 10.2° | |
| Node (Ω) | 169.8° | |
Notes | | |
Reference | Doc2019a | |
| Equinox | 2000 | |
Last observation | 2017 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
298.1 |
0.263 |
| 2001 |
300.5 |
0.273 |
| 2002 |
302.7 |
0.283 |
| 2003 |
304.8 |
0.294 |
| 2004 |
306.7 |
0.305 |
| 2005 |
308.4 |
0.316 |
| 2006 |
310.1 |
0.327 |
| 2007 |
311.6 |
0.338 |
| 2008 |
313.1 |
0.350 |
| 2009 |
314.4 |
0.361 |
| 2010 |
315.7 |
0.373 |
| 2011 |
316.9 |
0.385 |
| 2012 |
318.0 |
0.396 |
| 2013 |
319.1 |
0.408 |
| 2014 |
320.1 |
0.420 |
| 2015 |
321.0 |
0.432 |
| 2016 |
321.9 |
0.444 |
| 2017 |
322.7 |
0.456 |
| 2018 |
323.5 |
0.468 |
| 2019 |
324.3 |
0.479 |
| 2020 |
325.0 |
0.491 |
| 2021 |
325.7 |
0.503 |
| 2022 |
326.4 |
0.515 |
| 2023 |
327.0 |
0.526 |
| 2024 |
327.6 |
0.538 |
| 2025 |
328.2 |
0.550 |
| 2026 |
328.7 |
0.561 |
| 2027 |
329.3 |
0.573 |
| 2028 |
329.8 |
0.584 |
| 2029 |
330.3 |
0.595 |
| 2030 |
330.7 |
0.606 |
|
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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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