tom Dec 13, 2012
On 12/13/2012 1:48 PM, P. Clay Sherrod wrote:
> Yes...that is the actual sky direction of motion as measured from NORTH toward
> EAST, north being "0" and due east being "90" degrees, etc. West is 270 degrees
> and south is 180......
> So this means that in the case of 4179 Toutatis, for example, the PA (position
> angle) is moving in a direction of 63 degrees, or a little ENE relative to the
> background stars.
>
> Dr. Clay
> _____
> Arkansas Sky Observatories
> MPC H45 - Petit Jean Mountain South
> MPC H41 - Petit Jean Mountain
> MPC H43 - Conway West
> http://www.arksky.org/
>
> ----- Original Message -----
> From: "tom" <loeblt@...>
> To: <guide-user@yahoogroups.com>
> Sent: Thursday, December 13, 2012 11:31 AM
> Subject: Re: [guide-user] Position Angle
>
>
>> I am seeing it when I right-click on an asteroid and choose more
>> info....just after the apparent speed of the object.
>>
>> Tom
>>
>> On 12/13/2012 12:27 PM, P. Clay Sherrod wrote:
>>> Where are you seeing Position Angle noted for the asteroids?
>>> It can apply to direction of motion, or its position relative to another
>>> nearby
>>> object, OR the suspected position of a secondary "moon" object locked
>>> gravitationally to the main minor planet.
>>> For comets, it typically is in reference to the angle of the tail as measured
>>> from the center of the coma.
>>>
>>> Dr. Clay
>>> _____
>>> Arkansas Sky Observatories
>>> MPC H45 - Petit Jean Mountain South
>>> MPC H41 - Petit Jean Mountain
>>> MPC H43 - Conway West
>>> http://www.arksky.org/
>>>
>>> ----- Original Message -----
>>> From: "tom" <loeblt@...>
>>> To: <guide-user@yahoogroups.com>
>>> Sent: Thursday, December 13, 2012 11:21 AM
>>> Subject: [guide-user] Position Angle
>>>
>>>
>>>> Could someone explain the meaning of position angle as it relates to
>>>> asteroids in Guide 9?
>>>>
>>>> Thanks,
>>>>
>>>> Tom
>>>>
>>>>
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>>>
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>>
>>
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