Luyten 730-18

light-years

Catalog numbers:
     Luyten (L) 730-18, Luyten Two-Tenth (LTT) 1445
Arity: binary
Right Ascension and Declination: 2h59m32s, -16°47'0" (epoch 1950.0)
Distance from Sol: 25 light-years (7.6 parsecs)
Standard error in distance: 18.6335%
Source for distance: Gliese
Celestial (X,Y,Z) coordinates in ly: 17, 17, -7.2
Galactic (X,Y,Z) coordinates in ly: -12, -4.6, -21
Proper motion: 0.435 arcsec/yr (232.0° from north)
Source for proper motion: Gliese

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +11.13
Combined visual luminosity: 0.003 x Sol
Observed Separation: 34 A.U.s
As seen from A:
     B would appear as magnitude -11.51
As seen from B:
     A would appear as magnitude -12.35


Component A:
Catalog numbers:
     Luyten Palomar (LP) 771-95
Spectral class: M3
Luminosity Class: V-VI
Apparent visual magnitude: +10.96
Absolute visual magnitude: +11.55
Visual luminosity: 0.002 x Sol
Mass: 0.17 x Sol
Comfort Zone (visual): 0.05 A.U.s
Orbital period in CZ: 8.6768 days
Tidal index in CZ: 1771.99


Component B:
Catalog numbers:
     Luyten Palomar (LP) 771-96
Spectral class: M3
Luminosity Class: V-VI
Apparent visual magnitude: +11.80
Absolute visual magnitude: +12.39
Visual luminosity: 0.0010 x Sol
Mass: 0.14 x Sol
Comfort Zone (visual): 0.03 A.U.s
Orbital period in CZ: 5.35189 days
Tidal index in CZ: 4657.64

light-years
but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.