Dictionary of Nomenclature of Celestial Objects (Last update: 23-Oct-2020)
Result of query: info cati M51]$
Details on Acronym: [M51] [M51] (Mayall, 1951)= ([M51a]) = (My) (Not yet in Simbad)Write:<<[M51] NNN>>
Object:? (SIMBAD class: Unknown = Object of unknown nature)
Note:Observations with the 10-inch Metclaf telescope in South Africa of pecliar spectra objects. Among then 6 are PN My.
Harvard Bull., 920, 32-37 (1951)
New peculiar spectra.
oTable I: <[M51] NNN> (Nos 1-139) = <PN My NN> for (Nos 45, 47, 48, 56, 59, 60).