Re: [guide-user] 2012DA14 - visible or not?

Bill Gray Feb 9, 2013

Hi Lawrence,

On 02/07/2013 02:17 PM, Lawrence wrote:
> I have used the latest MPC elements in Guide and it shows this asteroid
> as only visible in the southern hemisphere. Information from the ESA
> website suggests that it will reach dec +81 at this time. Which is correct?

The MPC elements will lead you astray. To see how to get Guide to show
2012 DA14 correctly, look here :

Basically, the problem is that Guide uses a two-body solution, not a numerically
integrated one. It's not usually a problem, but it definitely becomes one for an
object passing this close to us.

The good news is that there's a file provided to switch over to elements that will
result in good positions within Guide. The results after applying the fix should match
Horizons and NEODyS within an arcminute or so.

-- Bill