1
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what are we have here is another PHA

2
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take a look at the Palermo hmm my guess

3
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is that this body is an ottoman do we

4
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have a size got to be in the 300 meter

5
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range let's get on this you can think of

6
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the near-earth object program office is

7
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sort of a CSI unit we discover these

8
00:00:28,910 --> 00:00:27,510
objects we try and determine what

9
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they're made of where they're going and

10
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just how dangerous they might be in

11
00:00:39,020 --> 00:00:35,730
December of four one of the new

12
00:00:41,690 --> 00:00:39,030
discoveries was an asteroid that later

13
00:00:44,150 --> 00:00:41,700
became known as Apophis it's an object

14
00:00:45,889 --> 00:00:44,160
about 270 meters long that's going to

15
00:00:49,389 --> 00:00:45,899
make an extremely close approach to the

16
00:00:52,610 --> 00:00:49,399
earth on April 13th Friday at the 13th

17
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2029 this object isn't a source for

18
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concern now but back then it had us

19
00:00:58,549 --> 00:00:55,859
worried

20
00:01:01,369 --> 00:00:58,559
so this is a representation of the earth

21
00:01:04,939 --> 00:01:01,379
and the orbit of the moon and the

22
00:01:07,940 --> 00:01:04,949
uncertainty region of Apophis all of the

23
00:01:10,280 --> 00:01:07,950
points on this line are possible

24
00:01:12,350 --> 00:01:10,290
locations for Apophis and any one of

25
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these dots could be the actual asteroid

26
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all of the numbers that we were seeing

27
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were well beyond what we had seen before

28
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and the threat level as a result was

29
00:01:25,340 --> 00:01:22,590
elevated the impact probability for a

30
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collision with the earth in 2029 reached

31
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the three percent level three chances

32
00:01:33,499 --> 00:01:30,990
out of 100 that it would hit when we saw

33
00:01:37,249 --> 00:01:33,509
the impact probability rising we put out

34
00:01:39,230 --> 00:01:37,259
calls for others to look on their in

35
00:01:41,719 --> 00:01:39,240
their archives for images of this

36
00:01:44,300 --> 00:01:41,729
asteroid that previous dates when we got

37
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additional observations from the optical

38
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telescopes and when we got additional

39
00:01:52,969 --> 00:01:48,690
radar data the threat level went to zero

40
00:01:58,920 --> 00:01:52,979
in 2029 and only remove left a slight

41
00:02:03,950 --> 00:02:01,140
there is a possibility that after it

42
00:02:06,750 --> 00:02:03,960
goes by the earth it may pass in a small

43
00:02:09,719 --> 00:02:06,760
doorway or keyhole I call it and be

44
00:02:11,880 --> 00:02:09,729
deflected by the earth's gravity into an

45
00:02:14,280 --> 00:02:11,890
orbit that would be about seven sixths

46
00:02:17,550 --> 00:02:14,290
of a year the earth would go around the

47
00:02:19,260 --> 00:02:17,560
Sun seven times the asteroid would go

48
00:02:20,940 --> 00:02:19,270
around the Sun six times and they would

49
00:02:24,449 --> 00:02:20,950
meet up at the same place at the same

50
00:02:26,490 --> 00:02:24,459
time on April 13th 2036 it will be

51
00:02:28,980 --> 00:02:26,500
important to look at this asteroid in

52
00:02:32,550 --> 00:02:28,990
the year 2013 we hope to see it with

53
00:02:34,530 --> 00:02:32,560
radar and then hopefully we will confirm

54
00:02:36,750 --> 00:02:34,540
that the asteroid will not pass through

55
00:02:40,229 --> 00:02:36,760
that keyhole that should allow us enough

56
00:02:42,449 --> 00:02:40,239
time if we unfortunately see that it is

57
00:02:44,190 --> 00:02:42,459
going to the keyhole perhaps to mount

58
00:02:46,470 --> 00:02:44,200
some sort of mission to the asteroid to

59
00:02:49,449 --> 00:02:46,480
deflect it and all we have to do then is

60
00:02:52,369 --> 00:02:49,459
deflected away from that keyhole

61
00:02:54,710 --> 00:02:52,379
we don't let down our guard not even for

62
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a day it's our job to monitor the inner

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solar systems and make sure that none of