Apollo 13

Apollo 13 (1995)

76 corrected entries

(9 votes)

Corrected entry: In the television interview, when the expert is describing the tolerance requirements for re-entry angle, he asks the reader to imagine that the earth is a basketball and the moon is a softball, and that the two balls are 14 feet apart, which is about 16.8 times the diameter of a basketball. The distance from the earth to the moon is about 30.14 times the diameter of the earth. This means that the 14 feet should really have been about 25 feet. Finally, the expert says that the re-entry angle has to be accurate to within 2.5 degrees, which he says is like aiming for a target the thickness of a sheet of paper. 2.5 degrees at 30 feet is actually about 13.14 inches thick (even at 14 feet, 2.5 degrees is about 7.34 inches).


Correction: Re-entry angle refers to the angle at which the spacecraft will re-enter the atmosphere, presumably with respect to the earth's surface. That angle would have to be correct within 2.5°. This post seems to refer to an angle of trajectory between the moon and earth, which would not have been the concern in preparing for re-entry.

Correction: I noted the same thing and it bothered me. It doesn't matter if the angle is with respect to to the moon or the earth. The expert's opinion was 2.5° based on 14 feet. That is 7." A far cry from the thickness of paper. Either the writers took extreme literary license for drama or the 'expert', (if actual testimony), was incorrect. It's simple math, not rocket science.

Corrected entry: When the crew are on their way back to Earth, Fido states "Flight. We're still shallowing up a bit in the re-entry corridor. It's almost like they're under weight." After some discussion in Mission Control, the crew is advised "We gotta get the weight right. We were expecting you to be toting a couple of hundred pounds of moonrocks." The amount of propellant in the LEM (since they didn't land, or return to lunar orbit) plus the fact that the LEM still had the descent stage attached, which, if they had landed would have been left on the moon would have more than made up for the weight of the rocks they were supposed to be carrying. But far, far worse than that is the fact that how much they weigh makes no difference at all, as Commander David Scott proved on Apollo 15 when he showed that a hammer and a feather dropped at the same time on the moon land at the same exact instant proving Galileo's law of gravity, that all objects fall at the same speed regardless of mass. (01:53:30)

Correction: That refers solely to things falling by means of gravity without air resistance. An object with a larger mass will require more force to move. Under the principle of F=M*A, it is also true that A=F/M.


Corrected entry: Right before the command module begins reentry to Earth, a hurricane is on Earth. When the Apollo mission took place (April 11-17, 1970) there were no hurricanes, cyclones, or typhoons.

Correction: To quote Wikipedia: "On April 17, 1970, Apollo 13 was making its final descent over the splashdown zone when they spotted Cyclone Helen as they were re-entering the earths atmosphere. Mission control had been tracking the storm to make sure it did not interfere with the missions re-entry."


Correction: Jim Lovell says on the DVD commentary the typhoon warning really happened and was not added by the filmmakers.

Corrected entry: When the astronauts are too shallow for re-entry because they are too light, it is mentioned they should have been carrying 200lbs of moon rock. Yet the lander portion of the lunar module, which is supposed to be left on the moon, is still attached to the ship all the way to jettison before re-entry, weighing far more than 200lb.

Correction: Mission control likely took what would have been the normal reentry weight and added in the weight of the lander and things inside it. But they forgot to subtract the weight of the moon rocks.

Greg Dwyer

Correction: The weight of the LEM (Lunar Excursion Module) would never play a part in NASA's calculations of reentry weight. NASA was only concerned with the exact weight of the Command Module as it entered Earth's upper atmosphere. The LEM was jettisoned long before the Command Module approached the reentry window and was never a weight consideration (they were only using the LEM and its oxygen supply as a "lifeboat"). And, besides, in micro-gravity the LEM and Command Modules were essentially weightless. As the Command Module reentered Earth's atmosphere, it was 200 lbs too light because it wasn't carrying the expected Moon rock samples. This lack of mass threatened to bounce the Command Module off the Earth's upper atmosphere, which would have been disastrous for the crew. If they had thought about it in advance, the crew should have cannibalized 200 lbs of equipment from the LEM before they jettisoned it, adding the necessary weight to the Command Module for reentry.

Corrected entry: The film features a portable cassette player. The first commercial portable cassette player (The Sony Walkman TPS-L2) wasn't released until July 1, 1979, 9 years after the Apollo 13 mission. (01:36:20)

Correction: It is not the Sony Walkman TPS-L2 of 1979 that we see in the film. It's the Sony model TC-50 that was used on NASA space missions. See here: http://www.walkmancentral.com/products/tc-50 (at this website we can also find the TPS-L2).

Super Grover Premium member

Corrected entry: When Marilyn has the nightmare about Jim's mission meeting disaster, the Capcom says, "We show S4B shutdown," and then a few seconds later says, "when you get in the LEM." This makes no sense, because S4B (Saturn 4B Booster) shutdown happens before the LEM is even docked (and days before anybody would actually get in the LEM). Granted, it's a dream, but Marilyn Lovell was actually fairly knowledgeable about the way lunar missions worked, and you'd think that if she could dream everything else correctly (the layout of the capsule, for instance), she (or the filmmakers) would get that detail correct.

Correction: It's a dream. These are not required to make factual sense, even if the dreamer in question is well acquainted with the subject matter. I'm pretty knowledgeable about cats, and am therefore reasonably sure that they can't fly, yet have, on occasion, had a dream that involved cats doing precisely that. Factually incorrect, but that's dreams for you.

Tailkinker Premium member

Corrected entry: During liftoff, one of the five second stage engines fails. This is indicated by a shot of the control panel, and one of the five indicator lights is flashing with a buzzer going off loudly in time with the flashing light. In fact engine failures were indicated by having a light simply go out, and there was no buzzer. Director Ron Howard originally shot the scene accurately, having a light just turn off was visually uninteresting and did not convey the drama of an engine failure. After getting the OK from Astronaut and technical advisor Dave Scott, the more dramatic indication was used.

Correction: Artistic decision to convey the drama and assist the audience, not really a movie mistake. A typical embellishment which is quite permissible in movie world.


Correction: Actually the indicator lit up if an engine was generating less than optimal thrust (ie a shutdown) While you are correct it did not flash or set off a caution/warning tone, all lights would have been extinguished and 5 would be lit with a solid light.

Corrected entry: As the spacecraft nears Earth the men in Mission Control remark that its angle of approach continues to wander away from plan. They figure out that it's due to the absence of the originally planned mass of moon rocks. This is wrong in several ways. First, it could not wander off course while coasting due only to the vehicle mass. From the time of Galileo it's been known that objects fall with equal acceleration (at a given distance) regardless of mass. Indeed, if that were the reason then the mass difference would not just be a lack of moon rocks, but also the extra unplanned mass of the entire lunar module. The actual reason was simply the slow leaking of gases from the damaged vehicle, acting as a low thrust rocket motor pushing it sideways. (01:53:20)

Correction: As the men at mission control assumed it was due to moon rocks at the time, the film was just repeating what they said on the transcripts. So it is not a factual error.

Correction: Actually it wasn't a leak due to damage, but due to the LM's steam sublimator (cooling system) giving a tiny thrust.

Corrected entry: In the scenes at the Lovell's home, as the crew nears re-entry, the priest, (who is wearing Catholic priest clothes), is wearing a wedding ring. (02:07:01)

Correction: Catholic priests do, in fact, wear wedding rings. They are 'married' to the Church. Nuns wear them as well - they are 'brides of Christ.' It serves the same purpose as someone who is married to another human wearing a wedding ring - it shows their commitment.


Correction: The real life priest was Episcopalian, Father Donald Raish, and the actual pictures from the time show him wearing similar clothes. Episcopalian priests appear to be allowed to marry.

Corrected entry: When Engine 5 of the S-II booster fails, as Lovell is waiting for word from Houston, he stares at the abort handle. However, at that point, the escape tower had already been jettisoned, so turning the abort handle would not have done anything.

Correction: The abort handle would jettison the command and service modules. Look under Mode II here. https://en.wikipedia.org/wiki/Apollo_abort_modes.

David George

Perhaps, but jettisoning the command module wouldn't have been of any use in a launch emergency. The purpose of the abort handle was to get the spacecraft away from an out-of-control booster that might crash, explode, or break apart (which was the fear with the center engine malfunction), so simply separating the CM wouldn't do any good without the rockets in the escape tower (which had already been jettisoned by that point) to propel the CM a safe distance away from the booster. In practical terms, the abort handle was no longer any use to the astronauts after jettisoning the tower, so Lovell fixating on it when he does in the movie is still a mistake.

Corrected entry: In the shot of Fred and Mary Haise at the Apollo 11 lunar landing party Mary is obviously pregnant. Apollo 11 was nine months before Apollo 13 and Mary is supposedly 8 months pregnant at the launch of Apollo 13. She does not have a baby during Apollo 13 and even if she was pregnant during Apollo 11 it would not have showed yet.

Correction: I disagree rather strongly with the statement "Mary is obviously pregnant" during the Apollo 11 lunar landing party at the Lovell house. We see Mary Haise in a few shots wearing her high-waisted white dress, and she does not look pregnant.

Super Grover Premium member

Corrected entry: Mission Control in Houston calls up "B.P.C. Clear", meaning that the 'Boost Protective Cover' has been safely jettisoned during ascent. However, the call comes on screen before it is shown being jettisoned.

Correction: "BPC clear" does not mean that it (and the rest of the LES) has been jettisoned. It means that the LES is ready to be jettisoned.

Corrected entry: The astronauts are shown taking their suits off before docking, but in real life they were not allowed to do this, in case of sudden cabin depressurization.

Correction: Not true at all. There's plenty of docking video and astronauts are not wearing suits in many of them.

Corrected entry: Jim Lovell tells his son that it will take him and his crew 4 days to get to the moon, but when the crew is getting their pictures taken by the media the journalist says Apollo 13 is expected to enter the moon's gravity in April 13, only two days after liftoff on April 11. So where is Lovell getting this 4 days figure from?

Correction: The moon's (and Earth's) gravity field extends well beyond the physical object. The Apollo spacecraft entered the moon's sphere of gravitational influence around 60 hours after liftoff (2:13 pm local time). Therefore they would have reached the moon's gravity late on the 13th or very early on the 14th. It's likely the reporter was just being approximate with his estimate, not exact. It would have been about 4 days post-launch before Lovell and Haise landed on the moon (I doubt he would have told his young son that it takes about 3 days to get there, then they have to establish orbit, check instruments, get the LM ready, then land). Therefore, both are basically correct.

Corrected entry: When Lovell is imagining walking on the moon, he looks at the Earth, which is near the horizon. The Earth is far too large (or too close) in the shot, something he would have known as he had seen Earth from the moon on Apollo 8 while they orbited (and took that famous Earthrise photo).

Correction: A character imagining something larger than it should be is hardly a mistake.

Jason Hoffman

Corrected entry: When Jim Lovell is talking to his son about landing on the moon, he says his moon landing will be "Better than Neil Armstrong; way better than Pete Conrad." In fact, while Armstrong did make a less-than-stellar landing (hampered by low fuel and a problem with his targeting computer), Pete Conrad's Apollo 12 landing was nearly perfect.

Correction: So what? There's always a healthy level of rivalry among such people. If Lovell reckons that he can land better than his predecessors did, then it's not a mistake to say so; people are entitled to have opinions. Bear in mind that Lovell would consider Armstrong's landing, hampered by fuel and computer problems, to be a more impressive feat than Conrad's relatively mundane experience, so it's quite reasonable that he would rank them in that order.

Tailkinker Premium member

Corrected entry: When the astronauts are preparing to dock with the Lunar Module, one of the people in Mission Control says, "If Swigert can't dock this thing, we don't have a mission." In fact, all three crew members were trained to peform the LEM docking, and had Swigert run into any trouble, Lovell or Haise could easily have done the procedure instead. This is confirmed in the DVD commentary.

Correction: Presumably Swigert is the best trained since this is his primary task, it's a reasonable, if not necessarily correct, remark to assume that if he can't do it then nobody can.


Someone in mission control says it in a voiceover that seems like it was added for exposition to build tension for the audience related to the "Jack is new to the mission" subplot. The idea that someone in mission control would be unaware of the cross-training of the astronauts to handle each others' tasks in an emergency is a dubious claim at best. And Lovell had served as the CMP on Apollo 8 (which admittedly didn't have a LM to dock with, but he was certainly familiar with how to fly and dock the craft).


Corrected entry: The scene showing the astronauts thrust towards the forward panels, and then violently back into their 'couches' is meant to show the massive thrust from the ascent and second stage engines. In fact, this sequence is inaccurate: The earlier Mercury and Gemini rockets did indeed create this massive 10 to 15-G load momentarily upon the astronauts, but the Saturn V did no such thing. The Saturn V never exceeded more than 2 Gs during any portion of lift off or ascent, and was in fact referred to as the "old man's rocket" by astronauts in reference to its relatively mild G-loads during flight.

Correction: This actually happened with the Apollo 13 mission. It wasn't supposed to, hence Swigert's sarcastic comment about "some little jolt", but a slight mistiming in the engine firing caused it.

Tailkinker Premium member

I think the point of the entry is that Lovell tells them to expect the jolt, implying that it was a feature of a Saturn V launch and that Lovell would be aware of it since he had experienced a Saturn V launch before, with Apollo 8. The scene as written is meant, then, to demonstrate Lovell's experience in spaceflight, even though the jolt would have been a surprise to him too.


Corrected entry: Many times in the movie, the Capcom refers to the CM and LM by their individual call signs, "Odyssey" and "Aquarius." In real life, those call signs would only be used when the LM had separated from the CM for a lunar landing. While the two ships were docked, as they were in this case for the entire mission, the single call sign "Apollo 13" would be used instead.

Correction: While this is true for a "routine" mission, Apollo 13 was not a mission anymore once it became "an emergency" situation. Remember that Lovell and his team had to use the Lunar Module as a "lifeboat" to survive the trip home. They don't refer to the Odyssey and the Aquarius separately until after the explosion. On a normal mission, the lunar module would not be attached to the SM or the CSM for the return trip. Using the call signs as opposed to similar sounding terms LM, SM, and CSM was also done to avoid confusion for the astronauts, as everything they had to do to get home was an unorthodox method that had never been attempted before, and the cold and lack of sleep was making it harder for them to concentrate.


Corrected entry: In the scene where Tom Hanks' wife is in the shower and drops her wedding ring down the drain, when she bends down to try and catch it, you can see the stick-on bra and light green underwear she is wearing for modesty purposes. Hard to catch it in full speed, but try frame by frame. Guess she (or director Ron Howard) didn't want to take any chances of nudity getting into the film.

Correction: As is stated in the rules of this site, if a mistake requires frame-by-frame to spot, it's not considered to be valid.

Tailkinker Premium member

Factual error: When Lovell's daughter is complaining that the Beatles have broken up, she slams the album Let It Be into her rack. The scene takes place on the day of the initial explosion aboard Apollo 13, April 13 1970 - immediately prior to the Lovell family attending the screening of a television broadcast from the spacecraft. Let It Be was not released as an album until May 9th, 1970. In April Ringo was still recording drum tracks, not even possible for an advance copy to get out.

More mistakes in Apollo 13

Gene Kranz: I don't care about what anything was *designed* to do. I care about what it *can* do.

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Apollo 13 mistake picture

Trivia: The Captain of the Iwo-Jima who Tom Hanks talks to at the end of the movie is the real Apollo 13 astronaut Jim Lovell.

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