According to the overall
spectral type for members of the Eunomia family,
Meta is an assumed
S-type asteroid.
Rotation period and poles In October 2006, a rotational
lightcurve of
Meta was obtained from photometric observations by French amateur astronomer
René Roy. Lightcurve analysis gave a well-defined
rotation period of 6.142 hours with a brightness amplitude of 0.46
magnitude, indicating that the asteroid has an elongated shape (). A modeled lightcurve using photometric data from the Lowell Photometric Database was published in 2016. It gave a concurring period of 6.14188 hours, as well as two
spin axes at (60.0°, −42.0°) and (198.0°, −79.0°) in
ecliptic coordinates (λ, β).
Diameter and albedo According to the surveys carried out by the Japanese
Akari satellite and the
NEOWISE mission of NASA's
Wide-field Infrared Survey Explorer,
Meta measures between 8.773 and 10.03 kilometers in diameter and its surface has an
albedo between 0.294 and 0.364. The
Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from
15 Eunomia, the namesake and
parent body of the Eunomia family – and calculates a diameter of 10.53 kilometers based on an
absolute magnitude of 12.2. == References ==