Innisfree (Canada) Meteorite - All in one

Spatial and Temporal Informations

Location of fall

Innisfree (Alberta, Canada)

Coordinates

53°24'53" N, -111°20'14" E

Date of fall

February 5, 1977 19h 17mn 38s LT
February 6, 1977 02h 17mn 38s UT

Fireball duration

4.09 s

Initial velocity

14.54 km/s

Start height of bolide

72 km

Terminal height of bolide

21 km

Fireball terminal velocity

4.70 km/s

Trajectory slope (// horizontal)

67.8 °

Photo

The fireball caught from Vegreville station

Credit: MORP

Meteorite Observation and Recording Program network

Zoom on first picture

Credit: MORP

Meteorite Observation and Recording Program network

the first fragment as it was found

Credit: MIAC

Physical and kinetics Informations

Maximum absolute magnitude

-12.1 ( 36 km of height )

Pre-atmospheric mass of the meteoroid

20 kg

Total known weight (TKW)

4.58 kg (until 1977 )
9 fragments:

February 17, 1977 : 2070 g
April 9, 1977 : 33 g
April 10, 1977 : 120 g et 345 g
April 11, 1977 : 894 g
April 21, 1977 : 330 g
May 1, 1977 : 22 g
May 3, 1977 : 387 g
May 8, 1977 : 375 g

Density

3.5 g cm-3

Classification

Ordinary chondrite LL5 (with Hypersthene)

Orbital

Semimajor axis (a)

1.872 UA

Inclination (i)

12.27 °

Eccentricity (e)

0.4732

Longitude of ascending nodet (W)

316.80 °

Argument of perihelion (w)

177.97 °

Perihelion distance (q)

0.986 UA

Aphelion distance (Q)

2.758 UA

Lien

Comité consultatif sur les météorites et les impacts (CCMI)

Meteorite Observation and Recovery Project (MORP)
Meteorite Observation and Recording Program (MORP)

Meteoritical Bulletin Database
Data on meteorite in the Meteoritical Society Database

Planetarium de Montréal

Reference

The innisfree meteorite fall: a photographic analysis of fragmantation, dynamics and luminosity

I. Halliday, A. Griffin, A. Blackwell

Meteoritics and Planetary Science. Supplement 16 [2] (1981), pp. 153-170

The Innisfree meteorite and the canadian camera network

I. halliday, A. Blackwell, A. Griffin

Journal Royal Astronomical Society of Canada 12 [1] (1978), pp. 15-39

Meteorite Action!

1977-02-05 : Innisfree (Canada)