Dictionary of Nomenclature of Celestial Objects (Last update: 18-Oct-2019)
Result of query: info cati PN YM$
Details on Acronym: YM YM (Yerkes McDonald obs.)
Write:<<PN YM NN>>
Object:PN (SIMBAD class: PN = Planetary Nebula)
Note:See also [J55] and [J56]Ref:=1955ApJ...121..604J
Astrophys. J., 121, 604-610 (1955)
Symmetric galactic nebulae.
oTable 1: <[J55] NNN> (Nos 1-152), among which 36 are cross-id. with <PN YM NN> (Nos 1-36)
Astrophys. J., 124, 90-92 (1956)
Symmetric galactic nebulae. II.
oTable 1: <[J56] NN> (Nos 1-32), among which 11 are cross-id. with <PN YM NN> (Nos 37-47)
Originof the Acronym: A = Assigned by the author(s)