[vsnet-chat 3539] GSC 6780-00497

[Sebasti若n Otero <varsao@fullzero.com.ar>]

Hi, John and vsnet friends:

                                              colleagues at the OCR (Observatorio Cristo Rey) in Rosario, Argentina, took CCD pictures of delta Scorpii field last night and they noticed that a catalogued "star" was missing.

 

The star is GSC 6780-00497

GSC= 16h 03m 53.17s -2256' 49.4"    9.55p, 1976.411

                                                                     9.62p, 1976.493

USNO= 16h 03m 53.23s -2256' 48.5"  9.4B, 8.8R , 1980.844  (V= 9.0)

 

This would imply a B-V of 0.4 and a yellow star, but it's missing in the Tycho and Tycho 2 catalogues.

In this position we can find:

 

PGC 56899 - ESO 516-6, a galaxy (Sbc) with a 14.94 B magnitude.

position:   16h 03m 53.4s -2256' 48".

 

That's what is shown in all the images retrieved from DSS, ESO, etc. A galaxy. But there is a 5-6 magnitude discrepance. How could this be explained?

 

Best wishws,

Sebastian.

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