Dictionary of Nomenclature of Celestial Objects
(Last update: 22-Mar-2024)

Result of query: info cati M51]$

Details on Acronym:   [M51]
  
[M51] (Mayall, 1951)= ([M51a]) = (My) (Not yet in Simbad)
Write:<<[M51] NNN>>
N: 139
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.
Ref:=1951BHarO.920...32M
byMAYALL M.W.
 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).