15038+4739 STF 1909 (44 Boo)
15h 03m 47.30s +47° 39' 14.6" P.A. 138.00 sep 0.2 mag 5.20,6.10 Sp F7V+K4V dist. 12.51 pc (40.81 l.y.)
| Coord 2000 |
15038+4739 |
|
Discov num |
STF1909 |
|
Comp |
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Coord arcsec 2000 |
15 03 47.30 +47 39 14.6 |
|
| Date first |
1819 |
|
Date last |
2020 |
|
Obs |
864 |
|
| Pa first |
228 |
|
Pa last |
138 |
|
P.A. Now (θ) |
200° |
|
| Sep first |
1.5 |
|
Sep last |
0.22 |
|
Sep. Now (ρ) |
0.391" |
|
| Mag pri |
5.20 |
|
Mag sec |
6.10 |
|
delta mag (ΔM) |
0.9 |
|
Spectral class |
F7V+K4V (yellow-white/yellow-orange) |
|
| Pri motion ra |
-444 |
|
Sec motion ra |
-374 |
|
| Pri motion dec |
+010 |
|
Sec motion dec |
+039 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.171 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
44 Boo |
|
Var name |
i Boo |
|
Constellation |
Bootes |
|
SAO |
45357 |
|
| HIP |
73695 |
|
Tycho2 |
3484-01580-1 |
|
HD |
133640 |
|
HR |
5618 |
|
| GC |
20281 |
|
ADS |
9494 |
|
GL |
Gl 575A |
|
BD |
BD+48 2259 |
|
| Flamsteed |
44 Bootis |
|
Flamsteed name |
44 Boo |
|
Distance |
12.51 |
|
Distance ly |
40.81 |
|
ORBITAL ELEMENTS
| Period (P) | 214.7628y | ± 2.2807 |
Periastron (T) | 2011.9704y | ± 0.1892 |
Semi-major axis (a) | 3.70131a | ± 0.02931 |
| Eccentricity (e) | 0.5145 | ± 0.00455 |
Inclination (i) | 83.708° | ± 0.093 |
Longitude of periastron (ω) | 39.146° | ± 0.813 |
| Node (Ω) | 56.678° | ± 0.13 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
53.9 |
2.020 |
| 2001 |
54.4 |
2.025 |
| 2002 |
54.9 |
2.022 |
| 2003 |
55.5 |
2.009 |
| 2004 |
56.0 |
1.986 |
| 2005 |
56.6 |
1.953 |
| 2006 |
57.1 |
1.909 |
| 2007 |
57.8 |
1.853 |
| 2008 |
58.4 |
1.785 |
| 2009 |
59.1 |
1.705 |
| 2010 |
59.9 |
1.613 |
| 2011 |
60.8 |
1.510 |
| 2012 |
61.8 |
1.396 |
| 2013 |
63.0 |
1.272 |
| 2014 |
64.5 |
1.139 |
| 2015 |
66.4 |
0.999 |
| 2016 |
68.9 |
0.854 |
| 2017 |
72.5 |
0.704 |
| 2018 |
78.0 |
0.555 |
| 2019 |
87.5 |
0.411 |
| 2020 |
106.1 |
0.287 |
| 2021 |
141.7 |
0.225 |
| 2022 |
179.4 |
0.273 |
| 2023 |
200.0 |
0.391 |
| 2024 |
210.4 |
0.534 |
| 2025 |
216.3 |
0.685 |
| 2026 |
220.1 |
0.838 |
| 2027 |
222.7 |
0.991 |
| 2028 |
224.6 |
1.142 |
| 2029 |
226.0 |
1.291 |
| 2030 |
227.2 |
1.437 |
|
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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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