CCD photometry of asteroids (4197) 1982 TA and 1997 LY4

Details CCD photometry of asteroids (4197) 1982 TA and 1997 LY4 CCD photometry of asteroids (4197) 1982 TA and 1997 LY4

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000p%26ss...48...59p&link_type=abstract

Planetary and Space Science, Volume 48, Issue 1, p. 59-65 (2000).

Physics

Scientific paper

We present results of our photometric observations of the Apollo asteroid (4197) 1982 TA and the Mars-crosser 1997 LY4. Their synodic rotation periods (3.53802+/-0.00005) and (46.07+/-0.02) h, respectively, have been derived. The fast rotation of (4197) suggests a lower limit of the bulk density of 1.1 g/cm3. The mean diameter of (4197) is likely in the range 3-6 km. The present knowledge does not support a possibility that (4197) is an extinct cometary nucleus as suggested from its orbit. The smaller (1.4-3 km), slowly-rotating asteroid 1997 LY4 is an elongated object with the equatorial axis ratio >= 1.8.

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