Konstantin v. Poschinger Jan 5, 2015
> Am 05.01.2015 um 22:49 schrieb Bill Gray pluto@... [guide-user] <guide-user@yahoogroups.com>:
>
> Hi all,
>
> Truth to tell, I don't know why there wasn't a "Go to LDN" right from
> Guide 1.0...
>
> For the nonce, I've provided this :
>
> http://www.projectpluto.com/ldn.zip
>
> which contains the data file and .tdf required for display and "go to"
> capability. UnZIP this in your Guide folder, use Go To... Go To .TDF,
> select "Lynd's Dark Nebulae", and enter the LDN number.
>
> Now, there's a possible problem here, which is that "LDN number"
> appears to be ambiguous. There are _three_ possible numbers for an
> LDN object.
>
> There is a number assigned by the original author, Beverly Lynds,
> "when the updated catalogue was created. The significance of this number
> is unknown. Also, it is not a unique number throughout this version of
> the catalogue." Which suggests to me it's probably not the one to use.
>
> There is a "Running Number in this version of the Catalogue".
>
> And finally, there is a "Catalogue number from original published
> version (ApJS 7, 1)". That's the one with which I am currently going.
> I'm not sure which is really in use. If it turns out I picked the
> wrong one, we'll just change (in ldn.tdf) the line
>
> text 1 4
>
> to read
>
> text 51 4
>
> for the "Running Number in this version", or to
>
> text 56 4
>
> for the "Number that B. Lynds assigned when the updated catalogue
> was created".
>
> And I may puzzle this one out myself shortly. But I thought I'd
> best post what I had here, before any of you invested too much time
> on it.
>
> -- Bill
>
> On 01/05/2015 12:22 PM, 'Anthony J. Kroes' akroes@... [guide-user] wrote:
>> Konstantin and Pierre,
>>
>>
>>
>> Not natively there isn't that I am aware of, but you can create a 'user
>> dataset' for them if you don't mind doing a little work - the instructions
>> are on the Project Pluto website. I did this for all the globulars in M33
>> (over 200) and it worked great. Someone here may already have done that for
>> the LDN's and might be willing to share.
>>
>>
>>
>> Your only alternative is to look them up the old fashioned way, by RA/Dec,
>> or by alternate name if you know it (i.e. LDN 1531 is Barnard 18). That's
>> the way I did a bunch recently for a list of Dark Nebula I was working on
>> observing. Please let me know if you come up with a dataset!
>>
>>
>>
>> Tony.
>>
>>
>>
>> From: guide-user@yahoogroups.com [mailto:guide-user@yahoogroups.com]
>> Sent: Monday, January 05, 2015 5:17 AM
>> To: guide-user@yahoogroups.com
>> Subject: [guide-user] Find LDN Dark Nebulas
>>
>>
>>
>>
>>
>> Hi,
>> is there a possibility to find the LDN Nebulas if you know the number?
>>
>> Konstantin
>>
>> Konstantin v. Poschinger
>>
>> Hammerichstr. 5
>> 22605 Hamburg
>> 040/8805747
>> 0171 1983476
>>
>>
>>
>>
>
>
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