05474+2939 BU 560 (HD 38491)
05h 47m 24.87s +29° 39' 26.9" P.A. 124.00 sep 1.7 mag 7.77,8.24 Sp F8 dist. 79.55 pc (259.49 l.y.)
| Coord 2000 |
05474+2939 |
|
Discov num |
BU 560 |
|
Comp |
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|
Coord arcsec 2000 |
05 47 24.87 +29 39 26.9 |
|
| Date first |
1877 |
|
Date last |
2019 |
|
Obs |
148 |
|
| Pa first |
208 |
|
Pa last |
123.9 |
|
P.A. Now (θ) |
123.9° |
|
| Sep first |
0.9 |
|
Sep last |
1.702 |
|
Sep. Now (ρ) |
1.702" |
|
| Mag pri |
7.77 |
|
Mag sec |
8.24 |
|
delta mag (ΔM) |
0.47 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
-015 |
|
Sec motion ra |
-015 |
|
| Pri motion dec |
-122 |
|
Sec motion dec |
-122 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 38491 |
|
Constellation |
Auriga |
|
SAO |
77555 |
|
HIP |
27336 |
|
| Tycho2 |
1874-00654-1 |
|
Gaia DR2 |
3443553118345445504 |
|
HD |
38491 |
|
GC |
7232 |
|
| ADS |
4371 |
|
BD |
BD+29 997 |
|
Distance |
79.55 |
|
Distance ly |
259.49 |
|
ORBITAL ELEMENTS
| Period (P) | 814.9628y | ± 355.3968 |
Periastron (T) | 1873.7525y | ± 7.8193 |
Semi-major axis (a) | 1.85671a | ± 0.7165 |
| Eccentricity (e) | 0.8365 | ± 0.11023 |
Inclination (i) | 130.257° | ± 13.128 |
Longitude of periastron (ω) | 268.709° | ± 12.085 |
| Node (Ω) | 177.675° | ± 30.168 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
127.4 |
1.624 |
| 2001 |
127.2 |
1.629 |
| 2002 |
127.0 |
1.634 |
| 2003 |
126.8 |
1.639 |
| 2004 |
126.6 |
1.644 |
| 2005 |
126.4 |
1.649 |
| 2006 |
126.2 |
1.654 |
| 2007 |
126.0 |
1.659 |
| 2008 |
125.8 |
1.664 |
| 2009 |
125.6 |
1.669 |
| 2010 |
125.4 |
1.673 |
| 2011 |
125.2 |
1.678 |
| 2012 |
125.0 |
1.683 |
| 2013 |
124.8 |
1.688 |
| 2014 |
124.6 |
1.692 |
| 2015 |
124.4 |
1.697 |
| 2016 |
124.2 |
1.702 |
| 2017 |
124.1 |
1.706 |
| 2018 |
123.9 |
1.711 |
| 2019 |
123.7 |
1.715 |
| 2020 |
123.5 |
1.720 |
| 2021 |
123.3 |
1.724 |
| 2022 |
123.1 |
1.728 |
| 2023 |
123.0 |
1.733 |
| 2024 |
122.8 |
1.737 |
| 2025 |
122.6 |
1.742 |
| 2026 |
122.4 |
1.746 |
| 2027 |
122.2 |
1.750 |
| 2028 |
122.1 |
1.754 |
| 2029 |
121.9 |
1.759 |
| 2030 |
121.7 |
1.763 |
|
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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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