RE: [guide-user] Lynd Dark Nebula used in GUIDE 9.0

Pierre Laporte Oct 8 12:42 PM

I also just installed Fv program and try the,  I am able to read it ant export it into a txt file.  At first glance, it appear ok but wit a lot of separator fields included.  I am using Window 7.


Give me some time to clean up the file and check it accuracy.


I will report later what I found.




Pierre Laporte


Centre d'Observation Astronomique des Monts Notre-Dame

Québec, CANADA


De : [mailto: ]
Envoyé : 8 octobre 2014 15:01
À :
Objet : RE: [guide-user] Lynd Dark Nebula used in GUIDE 9.0



I’ve just installed the newest version of Fv, but it sure doesn’t like to play well with Windows!  It deleted my copy of (twice), made a duplicate copy of my ‘Program Files (x86)’ folder with the parentheses changed to underscores, and (mostly) refuses to open the file.  I did get it open and saw the data stream 1 time out of 6.  I was going to check the individual entries and make a corrected file for folks here that were interested, but perhaps this would be better suited to being done by someone with a Linux machine.




From: [mailto: ]
Sent: Tuesday, October 07, 2014 7:43 PM
Subject: Re: [guide-user] Lynd Dark Nebula used in GUIDE 9.0



On 08/10/2014 2:23 AM, 'Anthony J. Kroes' akroes@... [guide-user] wrote:


I can verify that problem, Pierre.  The original Lynd’s Catalog from 1962 shows LDN 2 at coordinates RA 18 4 Dec -31 30 which, once converted to epoch 2000 coordinates, gives RA 18h 07m 14.6s, Dec -31° 29m 35s, almost exactly what you got when plate-solving your image. 


This is indeed where Guide shows LDN 4, which has the size of LDN 2 (1.24 sq. deg) listed for it as well.  Guide shows nothing at all in the spot where LDN 4 should be according to the epoch-corrected coordinates from the Lynd catalog (RA 17h 2m 30.1s Dec -22° 12m 15.2s)


I searched through the Guide folders and subfolders doing various text searches and cannot find where the LDN data is either.

There are lbn and ldn folders under nebulae. Guide uses these catalogs in FITS format which aren't human readable. If you have a copy of "fv" you can read them.

There's no point in being grown up if you can't be childish sometimes.
-- Dr. Who