Category talk:Titan IV 4B-33

Categorization with of Category:Titan IV 4B-33 and Category:Cassini-Huygens

Is it OK, that this category has itself as a subcategory through Category:Cassini-Huygens recursively? —⁠andrybak (talk) 05:11, 16 September 2016 (UTC)

Fixed the categories: the "Titan IV 4B-33" rocket was part of the mission "Cassini-Huygens", therefore, Category:Titan IV 4B-33 is in Category:Cassini-Huygens and not the other way around. —⁠andrybak (talk) 16:08, 23 August 2018 (UTC)

Andrybak, negative. We're not categorising as a mission, but as specific objects. The Cassini-Huygens joint spacecraft was a payload aboard the Titan IV; we use this categorisation method to accommodate cases where multiple payloads are launched on a single rocket, and it is better to standardise these cases rather than make the system a hodge-podge. I'm slowly going through the various launch vehicle categories to clean everything up. — Huntster (t @ c) 16:32, 23 August 2018 (UTC)

Huntster, thanks for explanation. Is this info recorded in some documentation/help pages? —⁠andrybak (talk) 16:34, 23 August 2018 (UTC)

Andrybak, there's no documentation, just like most methods on Commons. It is simply a practice that has developed over time and through consensus of editing. The vast majority of spaceflight categories are specifically about the physical object, rather than being generically about the mission. Even those mission categories usually have a subcategory specifically about the spacecraft. I would additionally argue that the launch vehicle is merely a delivery system for the mission, rather than being an irreplaceable part of the mission itself. — Huntster (t @ c) 17:07, 23 August 2018 (UTC)