Author Topic: Strange astronomical things...  (Read 13051 times)

AlexandredOr

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Re: Strange astronomical things...
« Reply #15 on: April 09, 2011, 09:04:42 am »
DR7

DR8


I understand that in some images we see a dark screen/window because of a too bright object behind. But here ?? What can be the reason ??

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AlexandredOr

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Re: Strange astronomical things...
« Reply #16 on: April 09, 2011, 09:40:46 am »
http://skyserver.sdss3.org/dr8/en/tools/chart/chart.asp?ra=172.72241&dec=-4.35105&scale=0.3961&opt=&width=512&height=512


No primary nor secondary reference number in DR8... but exists in DR7 : 587748878767423749


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AlexandredOr

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Re: Strange astronomical things...
« Reply #17 on: April 09, 2011, 09:47:04 am »
1237671142550667293


Beautiful shell galaxy. Strange that it has "only" a MCG number : MCG -01-29-015
2 great overlaps too  :D

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AlexandredOr

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Re: Strange astronomical things...
« Reply #18 on: April 16, 2011, 12:47:40 pm »
DR7                                                                  DR8


Another strange black window...

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AlexandredOr

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Re: Strange astronomical things...
« Reply #19 on: April 25, 2011, 04:59:32 pm »
1237674896351299893


This black diamond has planty of reference numbers !! Stupidly I expected none...  ;D

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RandyC

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Re: Strange astronomical things...
« Reply #20 on: May 06, 2011, 05:04:30 pm »
Randy

AlexandredOr

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Re: Strange astronomical things...
« Reply #21 on: May 25, 2011, 08:49:30 am »
1237648722837307451


I find a bit strange that such a pretty galaxy cluster has no number in the ABELL catalogue....

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AlexandredOr

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Re: Strange astronomical things...
« Reply #22 on: July 11, 2011, 08:44:19 am »
1237658492807610446


This galaxy belongs twice in the NGC catalogue, under 2 different numbers : 3332 and 3342... Just see here ... Strange isn't it ??  ;D

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AlexandredOr

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Re: Strange astronomical things...
« Reply #23 on: July 15, 2011, 03:56:35 pm »
1237649743946777079


It's strictly the same area. I see planty of photometric objects corresponding to nothing................... :-\

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AlexandredOr

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Re: Strange astronomical things...
« Reply #24 on: January 02, 2012, 07:50:20 am »
Another strange thing... These two close galaxies are NGC 7332 and NGC 7339
http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=758877310910791718




.... but I don't see NGC 7333, 7334, 7335, 7336, 7337 and 7338... where are they ? ? ? ?
« Last Edit: January 02, 2012, 07:54:13 am by AlexandredOr »

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egalaxy

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Re: Strange astronomical things...
« Reply #25 on: January 06, 2012, 11:23:21 am »
Quote from: wikipedia
Objects in the sky of the southern hemisphere are catalogued somewhat less thoroughly, but many were observed by John Herschel or James Dunlop. The NGC had many errors, but a serious if not complete attempt to eliminate them has been initiated by The NGC/IC Project, after partial attempts with the Revised New General Catalog (RNGC) by Sulentic and Tifft in 1973, and NGC2000.0 by Sinnott in 1988.



AlexandredOr

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Re: Strange astronomical things...
« Reply #26 on: January 08, 2012, 08:36:16 pm »
It's obviously right. Here it is another example :
1237661082661158999


The elliptical at the target is included in the two catalogues NGC and IC under these numbers :
NGC 1177   
IC 0281
which is an illogical thing, IC catalogue staying the complement of the NGC catalogue..
(the larger galaxy in the lower right corner is NGC 1175)

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AlexandredOr

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Re: Strange astronomical things...
« Reply #27 on: January 15, 2012, 03:12:39 pm »
1237680123324203036


How can it be that this stunner has only a MCG reference ??

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egalaxy

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Re: Strange astronomical things...
« Reply #28 on: January 16, 2012, 10:01:43 pm »
SDSS J083837.86+195923.3
Type   RA,dec   ObjID
Decimal   Hexagesimal
GALAXY   129.65778305,19.98981771   08:38:37.86,+19:59:23.34   1237667108501979201

ritacecilia

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Re: Strange astronomical things...
« Reply #29 on: January 18, 2012, 02:25:03 am »
SDSS J083837.86+195923.3
Type   RA,dec   ObjID
Decimal   Hexagesimal
GALAXY   129.65778305,19.98981771   08:38:37.86,+19:59:23.34   1237667108501979201

So here we are. I also had some examples of this strange anomaly and kept asking questions in the forum - but no answer came and I gave up asking. Strange as it is  - and just as my galaxy-looking "stars" I discovered today.