S

#### silylene

##### Guest

**2009 FD has a 1 in 400 chance of impact, with the most likely potential impacts in 2185 and 2190.**

current arc = 626 days, 175 observations

JPL Sentry cumulative risk PS = -1.66, NEODyS cumulative risk PS = -1.67

Toriano Scale not listed, since potential impact would be > 100 yrs into the future.

diameter = 0.13 km

Vimpact = 19.4 km/sec

Impact energy = 120 MT (seems low to me)

The are high PS numbers for an event so far in the future. This is a risky asteroid, and bears close watch to see if a diversion will be required. 2009 FD is now risky asteroid #2 on the JPL Sentry list. Let's see what more observations show.

[The #1 risk spot is the larger asteroid 1999 RQ36, with a cumulative PS = -1.12, 1 in1410 cumulative impact probability, with 8 possible impacts between 2169 and 2199]

Clearly, so far it appears that the late 22'cnd century is going to be a risky time for asteroid impacts!