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The article needs to more prominently cover (e.g. in the intro paragraph) the "limits to inhibit" call during ascent, as this incident makes the mission unique and is extremely notable. There's some source material in "Story: The Way of Water" by Anne E. Lenehan. http://books.google.com/books?id=kFuf9pSnbSYC starting at about page 198. Undoubtedly there's coverage elsewhere too! (sdsds - talk) 17:21, 7 August 2010 (UTC)[reply]
It is also note-worthy that this was the first targeted proximity operations mission. Targeting algorithms onboard the Shuttle included Rendezvous (RNDZ) code for coarse orbit adjustment, as well as fine. Coarse adjustments used targeting algorithms that employ Lambert equations. The fine, close-in, adjustments were made with newly tested (at the time) code using Clohessy-Wilshire equations, and using all available sensors in the aft cockpit. These were extensively tested in both 3-DOF and 6-DOF simulators before proximity targeted maneuvers were approved by NASA.
Due to the ATO, the entire mission ops for Days 2 and 3 were replanned real-time. RNDZ orbit designers worked 24 hours straight to replan the targeted proximity operations. This allowed the plasma physics phase of the mission to proceed as planned. — Preceding unsigned comment added by Nataliesees (talk • contribs) 14:59, 14 May 2015 (UTC)[reply]
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Clarifying this for future readers, I believe this user confused the [STS-51-F] and [STS-26] missions, both of which used the number '26' as identifiers for their respective missions in official documentation, but they were distinctive missions with different crews, payloads, shuttles, and objectives.
For reference, here are two YouTube videos of the launches and landings of these different missions - shown as external links:
[STS-51-F]
[STS-26R]
SpacePod9 (talk) 01:40, 28 January 2022 (UTC)[reply]
In the infobox it is shown Perigee altitude 312 km (194 mi)
Apogee altitude 320 km (200 mi). In the "Launch" section, it is stated The plan had been for a 385 km (239 mi) by 382 km (237 mi) orbit,[8] but the mission was carried out at 265 km (165 mi) by 262 km (163 mi).[9]. Doesn't this mean the Perigee/Apogee was 265/262 km, not 312/320 km? Or are they different stats?
Sijambo (talk) 16:19, 27 November 2023 (UTC)[reply]
I've reviewed the Space Shuttle Mission Report for 51F and found some discrepancies in the orbit data as compared to other sources. Currently, the only accessible version of this report I could find is here, though I am searching for a more reliable host. The report states: "..burn placed the Shuttle in a 143.1 nautical miles (265.0 km; 164.7 mi) by 108.0 nautical miles (200.0 km; 124.3 mi) orbit with an inclination of 49.57 degrees ... three additional OMS burns were required to raise the orbit to 170.7 nautical miles (316.1 km; 196.4 mi) by 169.8 nautical miles (314.5 km; 195.4 mi)."
The press kit found here, cited in the article for the planned orbit, indicates a different final orbit than currently stated in the article:『Insert into 186 nautical miles (344 km; 214 mi) by 106 nautical miles (196 km; 122 mi) (direct insertion orbit, then maneuver to approximately 207 nautical miles (383 km; 238 mi) circular with 7 OMS maneuvers...』Weirdly off by only one mile in either direction, but this is the source it was supposedly quoted from.
Additionally, the more recently dated Space Shuttle Missions Summary presents another set of figures for the insertion orbit: 142.9 nautical miles (264.7 km; 164.4 mi) by 108.7 nautical miles (201.3 km; 125.1 mi) with an inclination of 49.491 degrees, and an orbit of 174 nautical miles (322 km; 200 mi) by 164 nautical miles (304 km; 189 mi) at the time of deorbit.
Given the discrepancies and my inability to personally verify the sources of the Missions Report (all the links are dead now), I propose we determine which source we find most credible and update the article accordingly. askeuhd (talk) 10:49, 30 November 2023 (UTC)[reply]
