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Tri-Atlas Errata

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#1 KidOrion

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Posted 08 November 2018 - 11:42 AM

I wonder if we could get this thread pinned, perhaps, given the number of people who use the TriAtlas.

 

This was inspired by a thread in the General Astronomy forum (https://www.cloudyni...-open-clusters/). As we work through the TriAtlas charts/app, let's put any and all errata we find into this thread.

 

1. Tonantzintla 2 (globular cluster in Scorpius) is plotted about a half degree south of its actual position (C457).

 

2. The three galaxies that comprise Wild's Triplet (PGC 36723, PGC 36733, PGC 36742) are plotted individually in the right position, but there's a collective symbol and label for Wild's Triplet in the wrong position (C287).

 

3. A similar problem exists for Zwicky's Triplet; the galaxies (MCG+8-31-3, MCG+8-31-3A, PGC 59062) are plotted correctly but the collective symbol/label are plotted too far west (C99, C100).


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#2 havasman

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Posted 08 November 2018 - 01:43 PM

Very nice. Thanks.



#3 KidOrion

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Posted 11 November 2018 - 12:46 PM

Planetary nebula Sh 2-71 is plotted about 15 arcminutes west of its actual position (C 273). It's also plotted as an emission nebula 5 minutes of right ascension to the east.

 

Sky Safari also plots the planetary at the incorrect TriAtlas position. (A database error, then.)



#4 Mark Moyer

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Posted 20 August 2020 - 08:43 AM

Open Cluster NGC 6605 (C 321) is actually located about 20 arcminutes to the west and slightly south of the plotted position.

Open Cluster NGC 6197 (C 139) is actually located about 10 arcminutes to the east and slightly south of the plotted position.


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#5 Mark Moyer

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Posted 15 September 2020 - 08:11 AM

According to Simbad, the center of Open Cluster NGC 6991 (C 93) is actually located about 7 arcminutes to the west-southwest of the plotted position. Based on images, this only makes sense to me if the cluster is about 10' in diameter, which is much larger than the chart would indicate.


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#6 grzesznypl

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Posted 16 September 2020 - 08:45 AM

I wonder if we could get this thread pinned, perhaps, given the number of people who use the TriAtlas.

Pinned??? Good luck with that. Almost all pinned topics are completely outdated most of links inside them do not work anymore yet interesting and useful info is not being pinned like the guide I did some time ago (Free digital Sky Atlases and other valuable free guides) or this thread among others. 



#7 Cathal

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Posted 16 September 2020 - 10:44 AM

At least we have a location here that is searchable where known errata is collated, if there's going to be an update to the Atlas.




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