Dictionary of Nomenclature of Celestial Objects
(Last update: 02-Nov-2023)

Result of query: info cati PACH$

Details on Acronym:   PaCh
  
PaCh   (Parsamian+Chavira)= (PC) = (T) 
 Write:<<PaCh  NNN>>
 N:  534
Object:Em*  (SIMBAD class: EmLine* = Emission-line Star)
  Stat:is completely incorporated in Simbad
  Note:Table 1:    col(1): (Nos 1-534), Tonant. serial No., 'PaCh NNN'
    col(2): No. or letter in the Orion Constellation
    col(4): Tonant. numbering from 1953ApJ...117...73H:    Haro 4- (Nos 256-495) are new here
    Identif. charts
 in source:NAME Orion Nebula
   Ref:=1982BITon...3...69P
     byPARSAMIAN E.S.
, CHAVIRA E.
 Bol. Inst. Tonantzintla, 3, 69-96 (1982)

    Catalog of H-α emission stars in the region of the Orion nebula.

oTable 1, col(1): <PaCh NNN> (Nos 1-534). Table 1, col(4): <Haro 4-NNN>    (Nos 256-495)
=E=Catalogue in electronic form as <II/309/>

Details on Acronym:   PC
  
PC     (Parsamian+Chavira)
  ***** Avoid the usage of PC,  prefer PaCh
 Originof the Acronym: L = Found in the literature

Details on Acronym:   T
  
T      (Tonantzitla obs.)
  ***** Avoid the usage of T,  prefer PaCh
 Originof the Acronym: L (2003AJ....126.1916P)