Ring shaped galaxy in Volans (-Das Rheingold-).

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What is the catalog number of the ring shaped galaxy in Volans which is nicknamed Das Rheingold (aka Nibelungen Ring and Graham's Object) in Hugh C. Maddocks's handy booklet DEEP-SKY NAME INDEX 2000.0 ? (this object is also briefly mentioned in SKY CATALOGUE 2000.0, Volume 2: Double Stars, Variable Stars and Nonstellar Objects). The coordinates of this object are: R.A. 6h 41.4m / Decl. -74° 19' (2000.0). What is known about this ring shaped galaxy? I try to find online info, but... nothing. DannyCaes (talk) 13:07, 11 April 2021 (UTC)Reply

Starting with 644? Ayaena Aya helps you 22:41, 14 July 2022 (UTC)Reply