RMAN: information about catalog database in target database

hello,

we use the rman catalog function and in the rman catalog dict table rc_database the registered databases are stored.

in the target database many Views exist about the backup:

 select name
 from  v$fixed_table
 where name like 'V$%'
  and   name like '%BACKUP%'
 order by 1

also in the target database many Views exist about the rman: 

select name
 from  v$fixed_table
 where name like 'V$%'
  and   name like '%RMAN%'
 order by 1

but can i get the information about the rman catalog database ?

in never found any informations and in V$DATABASE isn't anything about it.