10200+1950 STF 1424 AB (Algieba)
10h 19m 58.35s +19° 50' 29.4" P.A. 127.00 sep 4.7 mag 2.37,3.64 Sp K1III+gG7 dist. 39.89 pc (130.12 l.y.)
| Coord 2000 |
10200+1950 |
|
Discov num |
STF1424 |
|
Comp |
AB |
|
Coord arcsec 2000 |
10 19 58.35 +19 50 29.4 |
|
| Date first |
1820 |
|
Date last |
2020 |
|
Obs |
863 |
|
| Pa first |
99 |
|
Pa last |
126.6 |
|
P.A. Now (θ) |
126.6° |
|
| Sep first |
3.7 |
|
Sep last |
4.74 |
|
Sep. Now (ρ) |
4.74" |
|
| Mag pri |
2.37 |
|
Mag sec |
3.64 |
|
delta mag (ΔM) |
1.27 |
|
Spectral class |
K1III+gG7 (yellow-orange) |
|
| Pri motion ra |
+311 |
|
Sec motion ra |
+306 |
|
| Pri motion dec |
-153 |
|
Sec motion dec |
-161 |
|
| Notes |
N
O
V
(See Notes, Orbital solution, Proper motion indicates physical) |
|
rPM=0.027 (< 0.3, Physical double)
This double is physical.
10200+1950 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Algieba |
81298 |
10 19 58 +19 50 29 |
STF 1424 AB |
2020 |
863 |
127 |
4.7 |
2.37 |
3.64 |
1.27 |
Y |
<=== |
| Show |
|
81298 |
10 19 58 +19 50 29 |
STF 1424 AC |
2016 |
31 |
288 |
341.2 |
2.37 |
9.64 |
7.27 |
|
|
| Show |
|
81298 |
10 19 58 +19 50 29 |
STF 1424 AD |
2016 |
15 |
302 |
371.3 |
2.37 |
10.62 |
8.25 |
|
|
| Show |
|
|
10 19 59 +19 50 27 |
STF 1424 BC |
1998 |
9 |
288 |
327.4 |
3.64 |
9.64 |
6.00 |
|
|
| Show |
|
|
10 19 36 +19 52 12 |
BAG 32 Ca,Cb |
2012 |
4 |
24 |
0.2 |
9.30 |
11.30 |
2.00 |
Y |
|
| Show |
|
|
10 19 36 +19 52 12 |
STF 1424 CD |
2016 |
30 |
6 |
90.7 |
9.64 |
10.62 |
0.98 |
|
|
| Show |
|
|
10 19 36 +19 52 12 |
FYM 38 CE |
2012 |
3 |
59 |
148.6 |
9.64 |
12.95 |
3.31 |
|
|
| Show |
|
|
10 19 36 +19 52 12 |
FYM 38 CF |
2012 |
3 |
238 |
53.4 |
9.64 |
14.10 |
4.46 |
|
|
Septuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Algieba |
|
Var name |
NSV4823 Leo |
|
Constellation |
Leo |
|
SAO |
81298 |
|
| HIP |
50583 |
|
Tycho2 |
1423-01349-1 |
|
HD |
89484 |
|
HR |
4057 |
|
| GC |
14177 |
|
ADS |
7724 |
|
BD |
BD+20 2467 |
|
Bayer |
Gamma 1 Leonis |
|
| Bayer name |
Gam1 Leo |
|
Flamsteed |
41 Leonis |
|
Flamsteed name |
41 Leo |
|
Distance |
39.89 |
|
| Distance ly |
130.12 |
|
Bayer greek |
γ1 Leo |
|
| Meaning |
From Arabic: ?????? al-jabha ('the forehead' [of the lion]). |
|
ORBITAL ELEMENTS SOLUTION #1
| Period (P) | 554y | ± 27 |
Periastron (T) | 1769y | ± 13 |
Semi-major axis (a) | 3.1a | ± 0.1 |
| Eccentricity (e) | 0.93 | ± 0.02 |
Inclination (i) | 41° | ± 5 |
Longitude of periastron (ω) | 114° | ± 10 |
| Node (Ω) | 188° | ± 14 |
Notes | n | |
Reference | PkO2014c | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
125.0 |
4.646 |
| 2001 |
125.1 |
4.651 |
| 2002 |
125.1 |
4.656 |
| 2003 |
125.2 |
4.660 |
| 2004 |
125.3 |
4.665 |
| 2005 |
125.4 |
4.670 |
| 2006 |
125.5 |
4.674 |
| 2007 |
125.5 |
4.678 |
| 2008 |
125.6 |
4.683 |
| 2009 |
125.7 |
4.687 |
| 2010 |
125.8 |
4.691 |
| 2011 |
125.9 |
4.695 |
| 2012 |
125.9 |
4.699 |
| 2013 |
126.0 |
4.703 |
| 2014 |
126.1 |
4.707 |
| 2015 |
126.2 |
4.711 |
| 2016 |
126.2 |
4.714 |
| 2017 |
126.3 |
4.718 |
| 2018 |
126.4 |
4.722 |
| 2019 |
126.5 |
4.725 |
| 2020 |
126.6 |
4.728 |
| 2021 |
126.6 |
4.732 |
| 2022 |
126.7 |
4.735 |
| 2023 |
126.8 |
4.738 |
| 2024 |
126.9 |
4.741 |
| 2025 |
126.9 |
4.744 |
| 2026 |
127.0 |
4.747 |
| 2027 |
127.1 |
4.750 |
| 2028 |
127.2 |
4.753 |
| 2029 |
127.2 |
4.755 |
| 2030 |
127.3 |
4.758 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
ORBITAL ELEMENTS SOLUTION #2
| Period (P) | 554y | ± 27 |
Periastron (T) | 1750y | ± 16 |
Semi-major axis (a) | 3.1a | ± 0.1 |
| Eccentricity (e) | 0.9 | ± 0.03 |
Inclination (i) | 49° | ± 6 |
Longitude of periastron (ω) | 309° | ± 6 |
| Node (Ω) | 347° | ± 9 |
Notes | n | |
Reference | PkO2014c | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
125.8 |
4.666 |
| 2001 |
125.9 |
4.671 |
| 2002 |
126.0 |
4.676 |
| 2003 |
126.1 |
4.681 |
| 2004 |
126.2 |
4.686 |
| 2005 |
126.2 |
4.690 |
| 2006 |
126.3 |
4.695 |
| 2007 |
126.4 |
4.699 |
| 2008 |
126.5 |
4.703 |
| 2009 |
126.6 |
4.708 |
| 2010 |
126.6 |
4.712 |
| 2011 |
126.7 |
4.716 |
| 2012 |
126.8 |
4.720 |
| 2013 |
126.9 |
4.724 |
| 2014 |
127.0 |
4.728 |
| 2015 |
127.0 |
4.731 |
| 2016 |
127.1 |
4.735 |
| 2017 |
127.2 |
4.739 |
| 2018 |
127.3 |
4.742 |
| 2019 |
127.4 |
4.746 |
| 2020 |
127.4 |
4.749 |
| 2021 |
127.5 |
4.752 |
| 2022 |
127.6 |
4.756 |
| 2023 |
127.7 |
4.759 |
| 2024 |
127.8 |
4.762 |
| 2025 |
127.8 |
4.765 |
| 2026 |
127.9 |
4.768 |
| 2027 |
128.0 |
4.771 |
| 2028 |
128.1 |
4.773 |
| 2029 |
128.1 |
4.776 |
| 2030 |
128.2 |
4.778 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
