Coord 2000 | 10200+1950 | Discov num | BAG 32 | Comp | Ca,Cb | Coord arcsec 2000 | 10 19 36.27 +19 52 12.0 | ||||
Date first | 1981 | Date last | 2012 | Obs | 4 | ||||||
Pa first | 39 | Pa last | 23.8 | P.A. Now (θ) | 23.8° | ||||||
Sep first | 0.1 | Sep last | 0.195 | Sep. Now (ρ) | 0.195" | ||||||
Mag pri | 9.30 | Mag sec | 11.30 | delta mag (ΔM) | 2 | Spectral class | M4.5Ve (red) | ||||
Pri motion ra | -499 | Sec motion ra | |||||||||
Pri motion dec | -043 | Sec motion dec | |||||||||
Notes | N O R (See Notes, Orbital solution, Red magnitudes) |
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 |
Constellation | Leo | Tycho2 | 1423-00174-1 | ADS | 7724 |
Period (P) | 26.5y | Periastron (T) | 1915y | Semi-major axis (a) | 0.1109a | |||
Eccentricity (e) | 0.6 | Inclination (i) | 91.1° | Longitude of periastron (ω) | 277.3° | |||
Node (Ω) | 126.3° | Notes | n | Reference | Reu1943 | |||
Equinox | Last observation | 1942 | Grade | 9 | (1=Definitive, 9=Indet.) |
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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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discov_num | notes | refcode |
STF1424 | A: gam Leo = 41 Leo = Algieba | |
Star C is flare star AD Leo = BD +20 2465, 5' distant, and not | Bag1984b | |
related to the pair AB. This companion has been detected only at | ||
7500 Angstroms, and is expected to have a very low mass. | ||
See Baize & Petit (1989) catalog of doubles with variable component. | Baz1989d | |
D is BD+20@2464. | ||
AC: Optical pair, based on study of relative motion of the components | ||
using the method of apparent motion parameters. | Kiy2008 | |
BAG 32 | Ca,Cb. 1981.2446: Flare star (M4.5Ve) known as having an unseen | |
companion of P ~ 27 yr (Reuyl 1943). Companion has been detected only | Reu1943 | |
at 750 nm. The companion is expected to have a very low mass. | Bag1984b | |
STF1424 | AB: H 1 28. | MEv2010 |
refcode | metd | author | reference |
Bag1984b | S j | Balega, Y.Y., Bonneau, D., & Foy, R | 1984A&AS...57...31B |
Bag1984b | A&AS 57, 31, 1984 | ||
Baz1989d | - | Baize, P. & Petit, M. | 1989A&AS...77..497B |
Baz1989d | A&AS 77, 497, 1989 | ||
Kiy2008 | - | Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. | 2008SvAL...32..405K |
Kiy2008 | SvAL 34, 405, 2008 | ||
MEv2010 | - | MacEvoy, B. | ................... |
MEv2010 | private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) | ||
Reu1943 | orb - | Reuyl, D. | 1943ApJ....97..186R |
Reu1943 | ApJ 97, 186, 1943 |
idgroup | discov | author |
1 | FYM | Fay, M. |
28 | STF | Struve, F.G.W. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
10200+1950 | BAG 32 | Ca,Cb | 1983 | 3 | 337 | 0.1 | 9.64 | N | 101936.26+195211.9 | ||
10200+1950 | BAG 32 | Ca,Cb | 2012 | 4 | 24 | 0.2 | 9.64 | M4.5Ve | NO | 101936.27+195212.0 |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
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A | B | C | Cb | D | E | |
B | pa=125.3° sep=4.67" | |||||
C | pa=288.2° sep=327.97" | pa=288.5° sep=332.44" | ||||
Cb | pa=288.3° sep=327.96" | pa=288.5° sep=332.42" | pa=22.5° sep=0.19" | |||
D | pa=303.8° sep=355.60" | pa=303.8° sep=360.27" | pa=9.5° sep=96.59" | pa=9.5° sep=96.40" | ||
E | pa=313.1° sep=262.86" | pa=312.9° sep=267.49" | pa=57.2° sep=142.14" | pa=57.3° sep=141.99" | pa=100.0° sep=105.10" | |
F | pa=281.8° sep=361.71" | pa=282.1° sep=365.99" | pa=236.2° sep=51.15" | pa=236.1° sep=51.32" | pa=205.3° sep=136.85" | pa=236.9° sep=193.29" |
Common name | Algieba | Meaning | From Arabic: ?????? al-jabha ('the forehead' [of the lion]). | Other names | Algeiba | Coord arcsec 2000 | 101958.35+195029.4 | ||||
Mag | 2.37 | Spectral class | K1III (yellow-orange) | PmRA | 311.00 | PmDE | -153.0 | ||||
SAO | 81298 | HIP | 50583 | Tycho2 | 1423-01349-1 | HD | 89484 | ||||
HR | 4057 | GC | 14177 | BD | BD+20 2467 | Bayer | Gamma Leonis | ||||
Bayer name | Gam Leo | Flamsteed | 41 Leonis | Flamsteed name | 41 Leo |
SAO | 81298 | DelFlag | RA1950 | PmRA1950 | 0.0218 | ||||||
DE1950 | PmDE1950 | -0.151 | Vmag | 2.6 | SpType | K0 | |||||
Double code | Source | 70 | CatNum | 14177 | DM | BD+20 2467 | |||||
DMcomp | A | BDsup | HD | 89484 | M HD | 0 | |||||
GC | 14177 | RA1950rad | 2.69312452 | DE1950rad | 0.35072808 | PmRA2000 | 0.0217 | ||||
PmDE2000 | -0.147 |
Catalog | H | HIP | 50583 | Proxy | H | RAhms | 10 19 58.16 | ||||
DEdms | +19 50 30.7 | Vmag | 2.01 | VarFlag | 1 | R Vmag | G | ||||
RAdeg | 154.992 | DEdeg | 19.8419 | AstroRef | A | Plx | 25.96 | ||||
CCDM | 10199+1951 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 124 | Rho | 4.581 | HD | 89484 | BD | BD+20 2467 | ||||
CD | CP | Dm number | +20 2467 | VIred | 1.17 | ||||||
SpType | K0III | R SpType | Coord arcsec 2000 | 101958.16+195030.7 |
HIP | 50583 | Sn | 17 | So | 3 | Nc | 2 | ||||
RArad | 2.7051266664 | DErad | 0.3463057904 | Plx | 25.07 | PmRA | 304.3 | ||||
PmDE | -154.28 | E RArad | 0.58 | E DErad | 0.32 | E Plx | 0.52 | ||||
E pmRA | 0.71 | E pmDE | 0.36 | Hpmag | 2.1684 | E Hpmag | 0.0011 | ||||
SHp | 0.006 | VA | 2 | BV | 1.128 | E BV | 0.029 | ||||
VI | 1.17 |
Coord arcsec 2000 | 101958.62+195026.7 | Coord calc | 101958.62+195026.7 | Mag | 3.64 | Spectral class | G5III (yellow) | ||||
PmRA | 306.00 | PmDE | -161.0 | Calc delta mag | 1.27 |
Var name | AD Leo | Coord arcsec 2000 | 101936.27+195212.0 | Coord calc | 101936.27+195212.0 | Mag | 9.64 | ||||
Spectral class | M4.5V (red) | PmRA | -499.00 | PmDE | -40.0 | Tycho2 | 1423-00174-1 | ||||
Calc delta mag | 7.27 |
Tycho2 | 1423-00174-1 | Pflag | RAmdeg | 154.90113196 | DEmdeg | 19.87002421 | |||||
PmRA | -501.8 | PmDE | -42.8 | E RAmdeg | 41 | E DEmdeg | 55 | ||||
E pmRA | 1.4 | E pmDE | 1.5 | EpRAm | 1971.49 | EpDEm | 1959.71 | ||||
Num | 10 | Q RAmdeg | 1.2 | Q DEmdeg | 0.9 | Q pmRA | 1.2 | ||||
Q pmDE | 0.9 | BTmag | 11.426 | E BTmag | 0.085 | VTmag | 9.640 | ||||
E VTmag | 0.031 | Prox | 898 | TYC | T | HIP | |||||
CCDM | RAdeg | 154.90238722 | DEdeg | 19.87011444 | EpRA 1990 | 1.67 | |||||
EpDE 1990 | 1.16 | E RAdeg | 111.9 | E DEdeg | 163.0 | Posflg | |||||
Corr | -0.1 |
Coord arcsec 2000 | 101936.28+195212.2 | Mag | 11.3 | Calc delta mag | 8.93 | Calc coord | yes |
Coord arcsec 2000 | 101937.40+195347.3 | Mag | 10.62 | Spectral class | G5V (yellow) | PmRA | -8.00 | ||||
PmDE | -25.0 | Tycho2 | 1423-00165-1 | Calc delta mag | 8.25 | Calc coord | yes |
Tycho2 | 1423-00165-1 | Pflag | RAmdeg | 154.90138127 | DEmdeg | 19.89499863 | |||||
PmRA | -10.9 | PmDE | -24.5 | E RAmdeg | 79 | E DEmdeg | 86 | ||||
E pmRA | 1.9 | E pmDE | 2.2 | EpRAm | 1947.54 | EpDEm | 1936.91 | ||||
Num | 5 | Q RAmdeg | 0.5 | Q DEmdeg | 0.6 | Q pmRA | 0.5 | ||||
Q pmDE | 0.6 | BTmag | 12.008 | E BTmag | 0.141 | VTmag | 10.617 | ||||
E VTmag | 0.065 | Prox | 898 | TYC | T | HIP | |||||
CCDM | RAdeg | 154.90141667 | DEdeg | 19.89505083 | EpRA 1990 | 1.66 | |||||
EpDE 1990 | 1.25 | E RAdeg | 125.9 | E DEdeg | 177.4 | Posflg | |||||
Corr | 0.0 |
Coord arcsec 2000 | 101944.74+195329.0 | Mag | 12.95 | PmRA | -8.00 | PmDE | -3.0 | ||||
Calc delta mag | 10.58 | Calc coord | yes |
Coord arcsec 2000 | 101933.26+195143.5 | Mag | 14.1 | PmRA | -35.00 | PmDE | 8.0 | ||||
Calc delta mag | 11.73 | Calc coord | yes |