Re: [Fwd: [AR] First Torrino Scale 2 object...]

Sean R. Lynch wrote:

> Sean R. Lynch wrote:
>
>> Donald Qualls wrote:
>>
>>> David Weinshenker wrote:
>>>
>>>>> From arocket... -dw
>>>>
>>>>
>>>>
>>>>
>>>> Paul Breed wrote:
>>>>
>>>>> http://neo.jpl.nasa.gov/risk/
>>>>>
>>>
>>> That's a very low velocity object with a small estimated diameter -- 
>>> I wonder if it isn't another "lost" upper stage that's been in an 
>>> almost-congruent orbit for a long time and just now getting 
>>> synchronized again enough to come close.  The white paint on those 
>>> rocket stages makes them look much, much larger than they are if you 
>>> have an assumption they're almost black like a chondrite asteroid.
>>>
>> I've started running the orbit backwards. I've found a close 
>> encounter on April 15, 1998 so far. I'll keep going.
>
>
> I should have mentioned that the 1998-04-15 encounter was 0.11 AU, not 
> all that close. Here are the other close encounters I've found:
>
> 0.11 AU (42.8 Rmoon) 1998-04-15 (Lunar Prospector 1998-01-07)
> 0.0585 AU (22.8 Rmoon) 1985-12-22  (Giotto 1985-07-02)
> 0.116 AU (45.1 Rmoon) 1975-04-15
> 0.185 AU (72.0 Rmoon) 1973-12-22 (Mariner 10 1973-10-03)
> 0.0731 AU (28.4 Rmoon) 1967-03-31 (Venera 4? When was that launched?)
> 0.113 AU (44.0 Rmoon) 1959-01-26 (Luna-1 1959-01-02)
>
Hmmm, it's not Venera 4. That was launched 1967-06-12.

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