2022-05-09, 05:47 PM
Hi MP Hunters,
I just noticed the 'Rarity' column on the JPL's CNEOS website here:
NEO Earth Close Approaches (nasa.gov)
Here's the description of 'Rarity':
Rarity
A measure of how infrequent the Earth close approach is for asteroids of the same size and larger: 0 means an average frequency of 100 per year, i.e., roughly every few days or less, 1 corresponds to roughly once a month, 2 to roughly once a year, 3 to roughly once a decade, etc. 'n/a' means that a frequency estimate is not available. See note for details.
This is the link from the Note:
https://iopscience.iop.org/article/10.38...c3519/meta
It seems like we're fortunate to have several '1's & '2's in May & June.
This is a neat concept. The article describing the method lists the pass of Apophis as a 6.
Phil S.
I just noticed the 'Rarity' column on the JPL's CNEOS website here:
NEO Earth Close Approaches (nasa.gov)
Here's the description of 'Rarity':
Rarity
A measure of how infrequent the Earth close approach is for asteroids of the same size and larger: 0 means an average frequency of 100 per year, i.e., roughly every few days or less, 1 corresponds to roughly once a month, 2 to roughly once a year, 3 to roughly once a decade, etc. 'n/a' means that a frequency estimate is not available. See note for details.
This is the link from the Note:
https://iopscience.iop.org/article/10.38...c3519/meta
It seems like we're fortunate to have several '1's & '2's in May & June.
This is a neat concept. The article describing the method lists the pass of Apophis as a 6.
Phil S.