US19720810 (Daylight Earth grazer)



 
 
CHARACTERISTICS
BEST ORBIT (J1950.0)
Before encounter

Semimajor axis: 1.661 +- 0.004 AU
Eccentricity: 0.3904 +- 0.0016
Inclination: 15.22 +- 0.03 deg.
Longitude of the ascending node: 317.956 deg.
Argument of perihelion: 355.57 +- 0.08 deg.
Apparition time: 1972 08 10 20:29 UT

Image of the orbit

After encounter

Semimajor axis: 1.4715 +- 0.0009 AU
Eccentricity: 0.3633 +- 0.0004
Inclination: 6.928 +- 0.012 deg.
Longitude of the ascending node: 317.949 deg.
Argument of perihelion: 315.76 +- 0.02 deg.
Apparition time: 1972 08 10 20:29 UT

Image of the orbit


 
BEST TRAJECTORY IN THE ATMOSPHERE
Before encounter

Latitude of perigee point: 44.386 deg. N
Longitude of perigee point: 247.007 deg. E
Height of perigee point: 57.85 km

Geocentric Radiant:

  • Right Ascension: 159.00 +- 0.02 deg.
  • Declination: -67.48 +- 0.08 deg.

    Speed: 15.083 +- 0.019 km/s
    Released energy:  kton
    Absolute Visual magnitude: -15 to -19

  • After encounter

    Geocentric Radiant:

  • Right Ascension: 155.538 +- 0.007 deg.
  • Declination: -19.05 +- 0.03 deg.

    Speed: 14.208 +- 0.005 km/s
    Released energy:  kton
    Absolute Visual magnitude: -15 to -19

  • PHYSICAL PARAMETERS
    Mass: 1E+5 to 1E+6 kg 
    Size: 5 to 10 m
    Classification: II (most probable)

    REFERENCES
  • Ceplecha Z.: Earth-grazing daylight fireball og August 10, 1972. Astronomy and Astrophysics 283, (1994), 287-288.
  • Ceplecha Z.: Impacts of meteoroids larger than 1 m into Earth's atmosphere. Astronomy and Astrophysics 286, (1994), 967-970.
  • Last update: 13/10/2000