"OG"  wrote in message news:674favF2mm357U1@mid.individual.net...
>
> "Robert"  wrote in message
> news:480cfe9e$0$15161$607ed4bc@cv.net...
>> This one involving magnitude:
>>
>> If a star has a parallax of 0.1 seconds of arc, and an apparent magnitude
>> of 3, what is its absolute magnitude?  Apparently the answer is 3, but I
>> have no idea why.  Can anyone show the simple work?
>>
>
> The absolute magnitude is defined to be . . .
>
> actually, you could look it up yourself.

I'm trying to help someone else, poor sucker.  They think I remember all
this stuff.

"Robert"  wrote in message 
news:480d1dc2$0$25033$607ed4bc@cv.net...
> "OG"  wrote in message news:674favF2mm357U1@mid.individual.net...
>>
>> "Robert"  wrote in message
>> news:480cfe9e$0$15161$607ed4bc@cv.net...
>>> This one involving magnitude:
>>>
>>> If a star has a parallax of 0.1 seconds of arc, and an apparent 
>>> magnitude
>>> of 3, what is its absolute magnitude?  Apparently the answer is 3, but I
>>> have no idea why.  Can anyone show the simple work?
>>>
>>
>> The absolute magnitude is defined to be . . .
>>
>> actually, you could look it up yourself.
>
> I'm trying to help someone else, poor sucker.  They think I remember all
> this stuff.

So what does it say when you look it up?

"OG" wrote in message news:674md1F2m31d8U1@mid.individual.net...
> So what does it say when you look it up?

I see - at 0.1 arcseconds the distance is 10 parsecs. And at 10 parsecs the 
Absolute Magnitude equals the Apparent Magnitude.

"OG"  wrote in message 
news:674md1F2m31d8U1@mid.individual.net...

>
> So what does it say when you look it up?


Does being this obnoxious make you feel good, or does it give you some 
perverted pleasure?

Someone's asking a genuine question in a newsgroup which has a current 
thread bemoaning the apparent demise of amatuer astronomy. and you delight 
in posting these spiteful replies.

I think we've got the answer to the thread about At what point do the 
amateur astronomers here give up?

"Manky Badger" <you.must@be.joking> wrote in message 
news:o9CdnW58vftPgpPVnZ2dnUVZ_tGonZ2d@giganews.com...
>
> "OG"  wrote in message 
> news:674md1F2m31d8U1@mid.individual.net...
>
>>
>> So what does it say when you look it up?
>
>
> Does being this obnoxious make you feel good, or does it give you some 
> perverted pleasure?
>
> Someone's asking a genuine question in a newsgroup which has a current 
> thread bemoaning the apparent demise of amatuer astronomy. and you delight 
> in posting these spiteful replies.
>
> I think we've got the answer to the thread about At what point do the 
> amateur astronomers here give up?

I'm sorry you feel that way. Not knowing what level of information the OP 
needs can make it tricky to know where to ptch an answer and sometimes it 
really is more useful to suggest the user do their own research . In his 
other question thread I posted a link that seems to have been of use; and he 
does seem to have found the information he needs in this thread - and 
hopefully much more.

"OG"  wrote in message 
news:676o2sF2njs3rU1@mid.individual.net...
>
> "Manky Badger" <you.must@be.joking> wrote in message 
> news:o9CdnW58vftPgpPVnZ2dnUVZ_tGonZ2d@giganews.com...
>>
>> "OG"  wrote in message 
>> news:674md1F2m31d8U1@mid.individual.net...
>>
>>>
>>> So what does it say when you look it up?
>>
>>
>> Does being this obnoxious make you feel good, or does it give you some 
>> perverted pleasure?
>>
>> Someone's asking a genuine question in a newsgroup which has a current 
>> thread bemoaning the apparent demise of amatuer astronomy. and you 
>> delight in posting these spiteful replies.
>>
>> I think we've got the answer to the thread about At what point do the 
>> amateur astronomers here give up?
>
> I'm sorry you feel that way. Not knowing what level of information the OP 
> needs can make it tricky to know where to ptch an answer and sometimes it 
> really is more useful to suggest the user do their own research . In his 
> other question thread I posted a link that seems to have been of use; and 
> he does seem to have found the information he needs in this thread - and 
> hopefully much more.

I'm sorry I need to make the point.

For the same amount of effort you took to make your rather nasty posting you 
could have asked what level of knowledge the chap wanted.
It's a safe bet that people have done their research before trying UseNet 
because of the humiliating replies they so often get.

"Manky Badger" <you.must@be.joking> wrote in message 
news:7sadneD_As0GZI3VnZ2dnUVZ_sKqnZ2d@giganews.com...
>
> "OG"  wrote in message 
> news:676o2sF2njs3rU1@mid.individual.net...
>>
>> "Manky Badger" <you.must@be.joking> wrote in message 
>> news:o9CdnW58vftPgpPVnZ2dnUVZ_tGonZ2d@giganews.com...
>>>
>>> "OG"  wrote in message 
>>> news:674md1F2m31d8U1@mid.individual.net...
>>>
>>>>
>>>> So what does it say when you look it up?
>>>
>>>
>>> Does being this obnoxious make you feel good, or does it give you some 
>>> perverted pleasure?
>>>
>>> Someone's asking a genuine question in a newsgroup which has a current 
>>> thread bemoaning the apparent demise of amatuer astronomy. and you 
>>> delight in posting these spiteful replies.
>>>
>>> I think we've got the answer to the thread about At what point do the 
>>> amateur astronomers here give up?
>>
>> I'm sorry you feel that way. Not knowing what level of information the OP 
>> needs can make it tricky to know where to ptch an answer and sometimes it 
>> really is more useful to suggest the user do their own research . In his 
>> other question thread I posted a link that seems to have been of use; and 
>> he does seem to have found the information he needs in this thread - and 
>> hopefully much more.
>
> I'm sorry I need to make the point.

No need