Re: [guide-user] Position Angle

P. Clay Sherrod Dec 13, 2012

Absolutely....so do I. I am assuming that the Add Trail tool is actually
generated from the position angle of motion of the elements loaded into Guide,
so it should be the same thing.

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 1:12 PM
Subject: Re: [guide-user] Position Angle


> Thanks for the clarification Dr. Clay...I usually turn on the Add Trail
> option for direction information...
>
> Tom
>
>
> 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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>>
>>
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>>
>>
>
>
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