Now we are coming really close to home.
The next main list in this Folder (on which all the info and graphs are based here) gives us fascinating data that can't be found anywhere else: see list "10"below. You can order each column in that list from A -Z or from Z - A. In that way you can discover a lot of interesting stuff, like for example: The first ever discovered Near Earth Object that made a close approach to earth nearer than the moon was discovered in 1991! All close approach dates before that point are theoretical back calculations! In other words: The first ever Near Earth Object that came closer than the moon was discovered in 1991! The total number of those objects is 690 by now (zero in 1990!). In the column "Days Notice" (Column D) you can see at a glance if the object was discovered too late, or before it made the close approach to earth. And much, much more.
All Data and Graphs (Moons, NEOs, NEAs, NECs, PHAs, Fireballs etc)
C = Close Calls nearer than Moon: NEOs approaching Earth less than 1.01 LD (Lunar Distances) = Past, Present, Future
List "10 = ALL Neo Objects closer than Moon":
Short Snapshot of the list, ordered by Date of Discovery:
How to read the above snapshot of list "10" on the example NEO Object "1991 BA"
(Column A):
Notice that you can see at one glance to the right on what Date the object was discovered
(Column B), on what date the close approach to earth happened or will happen
(Column C), at what time that close approach happened or will happen
(Column D), that it was discovered on the same day as it was approaching nearest to earth
(Column E) [marked in orange: see below], how far away it was at its close approach
(Column F) [in this case about 0.44 Lunar distances; or less than half the distance between earth and moon], how big it was in the lowest estimate
(Column G) and how big it was in the highest estimate
(Column H).
Notice also that everything that is marked in orange in Column E means that all those objects in that column were discovered on the same day as the close approach, or any given number of days after the close approach already happened. So the number 0 in that column means the same day for example and is thus marked orange (0 days warning). Same applies for "-4" (days) for example and every other minus number = it is marked in orange. Conversely, everything not marked orange in that column was discovered before the object made the close approach. So every positive number from "1" (day) upwards is unmarked.
Column A: Every Object that is marked green in this column has a double (or multiple entries) for close approaches: See Object "2003 SW130" in the above screenshot as an example.
Column C: Everything marked with the color green in this Column is a close approach that will happen in the future. Conversely, everything unmarked in that column happened in the past.
Column F has a colour scale = the color deep red marks the closest approaches to earth on one end of the scale while the color white (or rather not marked) is the "farthest away" but still closer than the moon (as everything is in this table and folder).
Column G and H also have a colour scale = the color deep red marks the biggest objects on one end of the scale while the color white (or rather not marked) marks the smallest objects.
Next, another Snapshot of the list, this time ordered by close approach date, so we can take a peek at the future!
Notice the huge chunks coming dangerously close 2028 and 2029. And most important: Notice that we pretty much established by that list now that there is a very good likelihood that a huge amount of big and small objects will slip by earth in the near future that are not on this list yet. Even massive ones. Also notice how many of those objects have come dangerously close to earth out of the blue (no forewarning or very little at the most)
especially in 2020. At some future point I'll dive into the data that can be gathered out of this list in more detail. It is all pretty interesting.
Next the graphs based on this list "10".
List/Graph "11 = All NEOs Closer than the Moon:...":
As you can see above, 2020 is another all-time record year with a big spike from last years all-time record! Never have there been so much close approaches. Also notice when it started to increase and compare it with the other data...
2020 is also another all-time record year in terms of newly discovered objects of that kind! See here:
Next: More fun with the data in list "10", and a similar picture!
2020 is another all-time record year also in this department: It sort of represents the total mass of stuff coming each year close to earth, closer than the moon (the overwhelming majority of it out of the blue)! See here:
