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Mars Craters - Frequency Distribution , Latitude, Size
The Python Code below gives the Frequency distribution of Craters on Mars Surface at various Latitudes. Also, it includes the Distribution of Crater size.
The Result of the above program is below;
The Result clarifies the following;
The major portion of the craters are concentrated near the Equatorial region.
More than 90% of the craters have diameters of about 5Kms.
Number of craters near the Polar region is the least.
Since there were no uncategorised craters in the Data set,Hence there is no missing data.
Mars Craters -Position, Crater Concentration Distributions
How is the concentration of craters and it’s position distributed on the surface of Mars?
The Mars Craters Study, presents a global database that includes over 300,000 Mars craters 1 km or larger that were created between 4.2 and 3.8 billion years ago during a period of heavy bombardment (i.e. impacts of asteroids, proto-planets, and comets). I was more interested in the position and the concentration of craters as well as Diameters of Craters.
From the analysis of data, It was found that the Concentration and Position of the craters varied between the North and South Pole of the Planet. The variations in the Concentration of craters with respect to position (Latitude) can be seen in the graph below;
The graph shows that the regions nearer to the equators were subjected to more bombardment than other regions. Furthermore, the Poles were the least prone to the bombardment.
SIze of the craters
Although the Size of the Craters varied a lot between the latitudes, the largest of average sizes were seen in the North Pole. But the largest Crater on Mars is between Latitudes of 40-30 °N. The low average size could be due to the fact that Larger Craters were close to the Equator, and most of the craters were of size less than 10 KM of Diameter. In fact, the Craters with Diameter greater than 50KM were less than 200 of all the 3,84,343 Craters analyzed.The graph below shows the Distribution of the Average_size with Latitude;
From the Data, It can be seen that more craters are on the Equatorial regions and the Size of Craters were on average less than 12KM of Diameter.
The Data used in this study, created by Stuart Robbins, presents a new global database for Mars that contains 378,540 craters statistically complete for diameters D ≥ 1 km.
More information is available at: http://about.sjrdesign.net/files/thesis/RobbinsThesis_LargeMB.pdf
Also Refer;
Robbins, S.J., and B.M. Hynek (2012). A New Global Database of Mars Impact Craters ≥1 km: 1. Database Creation, Properties, and Parameters. Journal of Geophysical Research – Planets, 117, E05004. doi: 10.1029/2011JE003966.
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