Barwellian wrote:Great if it is a Howardite fall...only 16 ever recorded.
Yes, interesting. I see
Howardites are:
From the Meteoritical Society web site, the recommended classification Howardite means:
"An achondrite from the howardite group."
The highlighted words are defined as follows:
achondrite: A stony meteorite that lacks chondrules and originated on a differentiated parent body.
howardite: Howardites are an abundant group of polymict-breccia achondrites that appear to represent mixtures of eucrites + diogenites (these three linked groups are collectively known as HED meteorites and may come from asteroid 4 Vesta). The main minerals in howardites are pyroxene (largely orthopyroxene) and Na-poor plagioclase. A minority of howardites are rich in solar-wind noble gases and thus inferred to be regolith breccias.
The associated Near Earth Object bolide and fireball database report is
here.
Date/Time - Peak Brightness (UT) 2015-09-02 20:10:30
Latitude (Deg) 39.1N
Longitude (Deg) 40.2E
Altitude (km) 39.8
Velocity (km/s) (calculated) 24.06 km/s
Velocity Components (km/s)
Total Radiated Energy (J) 3.7E+10
Calculated Total Impact Energy (kt) 0.13
In comparison the Chelyabinsk bolide was recorded as:
Total Radiated Energy (J) 3.75E+14
Calculated Total Impact Energy (kt) 440