How the 2013 Falcon 9 Launch Sparked UFO Reports

Introduction

The most widely documented UFO report associated with Mauritius occurred on the evening of 29 September 2013, when residents of Mauritius observed a bright, expanding object in the sky that appeared unlike any familiar aircraft, star, or meteor. Similar reports emerged almost simultaneously from neighbouring Réunion and from multiple locations across southern Africa. For a brief period, the phenomenon was widely discussed as a possible UFO because of its unusual appearance: a glowing orb surrounded by a diffuse cloud that seemed to grow in size and drift across the sky. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013

Unlike many UFO cases, however, this event was investigated rapidly and linked to a known aerospace activity. The object was ultimately identified as venting from the upper stage of a SpaceX Falcon 9 rocket launched earlier that day on the CASSIOPE mission. The Mauritius sighting has since become an instructive example of how rare spaceflight phenomena can generate convincing UFO reports when viewed from great distances under unusual lighting conditions. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013 [SpaceX]spacex.comSpaceXCassiope MissionOn Sunday, September 29 at 9:00 a.m. PT, Falcon 9 launched the Cassiope mission to low-Earth orbit from Space Launc…

Witness Accounts

Reports from Mauritius described a luminous object appearing against the night sky, often characterised as a glowing sphere or bright cloud with a concentrated central light. Videos recorded on the island showed an object that did not resemble a conventional aircraft and appeared far larger than a typical satellite. Similar descriptions were reported from Réunion and parts of southern Africa, suggesting a phenomenon visible across a vast geographic area rather than a localised event. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013 Facebook Several features contributed to the UFO interpretation: [facebook.com]facebook.comSpaceX's Falcon 9 lit up the evening sky Sept. 28, when…A video taken in Mauritius shows a spooky looking glowing orb shining in the s…

• The object appeared suddenly without an obvious source.
• It expanded over time, creating the impression of a structured craft or energy field.
• It moved slowly relative to the stars.
• Its diffuse glow was unlike the point-like appearance of planets or satellites.
• Many observers had never previously seen a rocket plume at high altitude. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013 [Cloudy Nights]cloudynights.com436734 spacex falcon 9 fuel vent as seen from s africaThe Flare. Shortly after sunset on 29 Sept 2013 I was setting up my equipment for a night of visual…Read more…

The sighting’s credibility was strengthened by the large number of independent witnesses. Unlike many UFO reports that rely on a single observer, the 2013 event was documented from multiple countries and by numerous individuals who had no connection to one another. This broad witness base established that something unusual was genuinely visible; the question was what that object actually was. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013

Rocket Trajectory and Plume

The key to understanding the event lies in the Falcon 9 launch timeline. SpaceX launched the CASSIOPE mission from Vandenberg Air Force Base in California at 16:00 UTC on 29 September 2013. The mission was notable because it was the maiden flight of the upgraded Falcon 9 v1.1 and SpaceX’s first launch from Vandenberg. [SpaceX]spacex.comSpaceXCassiope MissionOn Sunday, September 29 at 9:00 a.m. PT, Falcon 9 launched the Cassiope mission to low-Earth orbit from Space Launc… [Spaceflight Now]spaceflightnow.comPayload: Cassiope Launch date: September 29, 2013. Launch time: 1600 GMT (12 p.m. EDT; 9 a.m. PDT) Launch window: 3 hours. Site: SLC-4E…Published: September 29, 2013

After delivering its payload toward orbit, the rocket’s second stage continued travelling thousands of kilometres above Earth. During post-mission operations, the stage vented residual propellants. At orbital altitudes, released gases rapidly expand into enormous clouds that can stretch for hundreds of kilometres. Because these clouds form in near-vacuum conditions, they behave very differently from exhaust plumes seen at lower altitudes. [Cloudy Nights]cloudynights.com436734 spacex falcon 9 fuel vent as seen from s africaThe Flare. Shortly after sunset on 29 Sept 2013 I was setting up my equipment for a night of visual…Read more…

For observers in Mauritius, the timing was ideal for producing a dramatic visual effect. The rocket stage remained illuminated by sunlight even though observers on the ground were already in darkness. This created what is often called a “twilight phenomenon”, where high-altitude exhaust or vented gases reflect sunlight and appear as a glowing, expanding structure suspended in the night sky. [Cloudy Nights]cloudynights.com436734 spacex falcon 9 fuel vent as seen from s africaThe Flare. Shortly after sunset on 29 Sept 2013 I was setting up my equipment for a night of visual…Read more… Instagram The resulting appearance matched many witness descriptions: [instagram.com]instagram.comr atmosphere at sunset. #spacex #falcon9 #space. more…

Observed featureRocket-plume explanationBright central objectSunlit upper-stage vehicleExpanding haloVented gases spreading in near-vacuumSlow movementOrbital motion viewed from extreme distanceUnusual glowSunlight reflecting from frozen particles and gasLarge apparent sizeRapid expansion of the plume cloud

This explanation accounts not only for the appearance but also for the broad geographic visibility. An object hundreds of kilometres above Earth can be seen simultaneously from regions separated by thousands of kilometres, exactly as occurred on 29 September 2013. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013 [Cloudy Nights]cloudynights.com436734 spacex falcon 9 fuel vent as seen from s africaThe Flare. Shortly after sunset on 29 Sept 2013 I was setting up my equipment for a night of visual…Read more…

Why the Sighting Looked So Unusual

The Mauritius case is particularly valuable because it demonstrates how an authentic and dramatic observation can still have a conventional explanation.

Most people are familiar with aircraft lights, meteors, and astronomical objects. Few have experience observing orbital-stage venting. The phenomenon combines several visual characteristics that naturally encourage UFO interpretations:

Rocket venting events are especially deceptive because they do not resemble a rocket launch seen near the launch site. Instead, observers may see only the illuminated cloud while the vehicle itself is nearly invisible. Without knowledge of a recent launch, the sight can appear completely inexplicable.

Astronomers and satellite observers in southern Africa later documented the same phenomenon and identified it as a Falcon 9 upper-stage venting event. Detailed observational analyses showed that the timing and appearance were consistent with the spacecraft’s orbital passage after launch. [Cloudy Nights]cloudynights.com436734 spacex falcon 9 fuel vent as seen from s africaThe Flare. Shortly after sunset on 29 Sept 2013 I was setting up my equipment for a night of visual…Read more…

Media Coverage and the Shift from UFO to Identification

News coverage initially reflected public uncertainty. Reports highlighted witness descriptions and the unusual appearance of the object, often using the term “UFO” in its literal sense: an unidentified flying object. The sighting attracted attention because it was visible across a large section of the Indian Ocean region and southern Africa. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013

The explanation emerged quickly once aerospace observers connected the timing with the Falcon 9 launch. Space.com reported that the object seen from Mauritius was linked to fuel or propellant released from the rocket’s upper stage. This identification aligned with launch records, orbital trajectories, and the visual characteristics recorded by witnesses. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013 [Facebook Importantly]facebook.comSpaceX's Falcon 9 lit up the evening sky Sept. 28, when…A video taken in Mauritius shows a spooky looking glowing orb shining in the s…, no competing explanation gained comparable evidential support. There were no radar reports suggesting an unknown craft, no corroborated indications of unconventional manoeuvres, and no physical evidence inconsistent with a rocket-plume origin. The available evidence converged on a single explanation supported by independent technical data. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013 [SpaceX]spacex.comSpaceXCassiope MissionOn Sunday, September 29 at 9:00 a.m. PT, Falcon 9 launched the Cassiope mission to low-Earth orbit from Space Launc…

What the Case Reveals About UFO Investigation in Mauritius

The 29 September 2013 sighting remains the strongest-known Mauritius UFO case precisely because it was so well documented. Numerous witnesses observed the event, videos were recorded, and the timing could be compared against known aerospace activity. Those same strengths also made a solution possible. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013

From an evidential standpoint, the case is best classified as an identified phenomenon rather than an unresolved UFO. The explanation is supported by:

• A documented Falcon 9 launch on the same day.
• Consistent timing between launch operations and sightings.
• Independent observations across multiple countries.
• Known physics of high-altitude propellant venting.
• Similar appearances documented in later Falcon 9 plume events worldwide. Instagram [SpaceX]spacex.comSpaceXCassiope MissionOn Sunday, September 29 at 9:00 a.m. PT, Falcon 9 launched the Cassiope mission to low-Earth orbit from Space Launc… [Spaceflight Now]spaceflightnow.comPayload: Cassiope Launch date: September 29, 2013. Launch time: 1600 GMT (12 p.m. EDT; 9 a.m. PDT) Launch window: 3 hours. Site: SLC-4E…Published: September 29, 2013

For the broader Mauritius UFO record, the incident serves as a benchmark. It demonstrates how extraordinary-looking aerial events can arise from uncommon but entirely understood spaceflight activities. Rather than weakening the value of eyewitness testimony, the case shows the importance of combining witness reports with launch records, orbital data, and atmospheric conditions before treating a sighting as genuinely unexplained.

In the chronology of Mauritian UFO reports, the 29 September 2013 event stands as the clearest example of a widely witnessed mystery that moved from apparent anomaly to convincing identification through technical investigation. [Space]space.comX Rocket Launch Sparks 'UFO' Sightings: ReportsSpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports…September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa…Published: September 30, 2013 [SpaceX]spacex.comSpaceXCassiope MissionOn Sunday, September 29 at 9:00 a.m. PT, Falcon 9 launched the Cassiope mission to low-Earth orbit from Space Launc…

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Further Reading

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Endnotes

1. Source: space.com
   Title: X Rocket Launch Sparks ‘UFO’ Sightings: Reports
   Link: https://www.space.com/23013-spacex-falcon-9-rocket-ufo.html
   Source snippet

   SpaceSpaceX Rocket Launch Sparks 'UFO' Sightings: Reports...September 30, 2013 — 30 Sept 2013 — People on the ground in southern Africa...

   Published: September 30, 2013

2. Source: spacex.com
   Link: https://www.spacex.com/launches/cassiope
   Source snippet

   SpaceXCassiope MissionOn Sunday, September 29 at 9:00 a.m. PT, Falcon 9 launched the Cassiope mission to low-Earth orbit from Space Launc...

3. Source: facebook.com
   Link: https://www.facebook.com/spacecom/posts/spacexs-falcon-9-lit-up-the-evening-sky-sept-28-when-the-expanding-jellyfish-plu/1157135202943829/
   Source snippet

   SpaceX's Falcon 9 lit up the evening sky Sept. 28, when...A video taken in Mauritius shows a spooky looking glowing orb shining in the s...

4. Source: instagram.com
   Link: https://www.instagram.com/reel/DUlAu_MkT1J/?hl=en-gb
   Source snippet

   r atmosphere at sunset. #spacex #falcon9 #space. more...

5. Source: instagram.com
   Link: https://www.instagram.com/reel/DM-gGUfz_x0/?hl=en

6. Source: m.facebook.com
   Title: The Voice
   Link: https://m.facebook.com/TheVoiceBW/photos/a.383799759085/10151786091174086/?type=3
   Source snippet

   Voice - Reports about a fuzzy-looking...... South Africa. Mauritius' L'Express wondered whether it was a UFO, a satellite or a star clus...

7. Source: facebook.com
   Title: september 29th on this day in 2013 spacex launched the first ever falcon 9 to li
   Link: https://www.facebook.com/NASASpaceflight/posts/september-29th-on-this-day-in-2013-spacex-launched-the-first-ever-falcon-9-to-li/1110360021090034/
   Source snippet

   on this day in 2013, SpaceX launched the first ever Falcon...September 29th - on this day in 2013, SpaceX launched the first ever Falcon...

8. Source: facebook.com
   Link: https://www.facebook.com/groups/spaceintel101/posts/1907075509675260/

9. Source: facebook.com
   Link: https://www.facebook.com/13NewsNow/posts/early-risers-in-hampton-roads-spotted-a-glowing-plume-in-the-sky-as-sunlight-lit/1333198798854974/
   Source snippet

   the exhaust from a SpaceX Falcon 9 launch, creating a rare dawn...Read more...

10. Source: instagram.com
    Title: Breathtaking capture!Read more
    Link: https://www.instagram.com/p/DXvFopPDtfN/
    Source snippet

    SpaceX Falcon 9 launch across Earth's twilight horizon...Falcon 9 SpaceX launch across Earth's twilight horizon, seen from the ISS near...

11. Source: instagram.com
    Link: https://www.instagram.com/reel/DVeA57rCs0p/?hl=en
    Source snippet

    the exhaust from a SpaceX Falcon 9 launch, creating a rare dawn...Read more...

12. Source: instagram.com
    Link: https://www.instagram.com/reel/DXvzsDWNOrj/
    Source snippet

    Falcon 9 SpaceX launch across Earth's twilight horizon, seen...Falcon 9 SpaceX launch across Earth's twilight horizon, seen from the ISS...

13. Source: youtube.com
    Title: Next Gen Falcon 9 | Demonstration Flight
    Link: https://www.youtube.com/watch?v=PU7Li5rX_OQ
    Source snippet

    SpaceX Falcon 9 Cassiope Launch 29 Sep 2013...

14. Source: youtube.com
    Link: https://www.youtube.com/watch?v=WX0Gnid2E0E
    Source snippet

    EGM Heritage...

15. Source: spaceflightnow.com
    Link: https://www.spaceflightnow.com/falcon9/006/status.html
    Source snippet

    Payload: Cassiope Launch date: September 29, 2013. Launch time: 1600 GMT (12 p.m. EDT; 9 a.m. PDT) Launch window: 3 hours. Site: SLC-4E...

    Published: September 29, 2013

16. Source: cloudynights.com
    Title: 436734 spacex falcon 9 fuel vent as seen from s africa
    Link: https://www.cloudynights.com/forums/topic/436734-spacex-falcon-9-fuel-vent-as-seen-from-s-africa/
    Source snippet

    The Flare. Shortly after sunset on 29 Sept 2013 I was setting up my equipment for a night of visual...Read more...

17. Source: Wikipedia
    Title: Falcon 9 v1.1
    Link: https://en.wikipedia.org/wiki/Falcon_9_v1.1

18. Source: Wikipedia
    Link: https://en.wikipedia.org/wiki/CASSIOPE
    Source snippet

    CASSIOPEIt was launched September 29, 2013, on the first flight of the SpaceX Falcon 9 v1.1 launch vehicle. CASSIOPE is the first Cana...

    Published: September 29, 2013

19. Source: americaspace.com
    Link: https://www.americaspace.com/2013/09/24/spacex-readies-uprated-falcon-9-v1-1-rocket-and-merlin-1d-engine-to-launch-canadas-cassiope-mission/
    Source snippet

    SpaceX Ready to Launch Uprated Falcon 9 v1.1 and...24 Sept 2013 — A second hot fire was successfully concluded on Thursday, 19 September...

20. Source: space.stackexchange.com
    Title: what is this additional plume on the falcon 9 and is it being ignited corrected
    Link: https://space.stackexchange.com/questions/13497/what-is-this-additional-plume-on-the-falcon-9-and-is-it-being-ignited-corrected
    Source snippet

    is this additional plume on the Falcon 9, and is it...13 Jan 2016 — I hadn't noticed it before, but after seeing yesterday's recap video...

Additional References

1. Source: youtube.com
   Link: https://www.youtube.com/watch?v=UmUruWZWy04
   Source snippet

   Incredible Glowing Plume Captured During SpaceX Falcon 9...What an absolutely breathtaking sight! I was out in Highland, California, whe...

2. Source: commons.wikimedia.org
   Title: File:SpaceX Falcon 9 Cassiope Launch 29 Sep 2013.webm
   Link: https://commons.wikimedia.org/wiki/File%3ASpaceX_Falcon_9_Cassiope_Launch_29_Sep_2013.webm
   Source snippet

   wikimedia.orgFile:SpaceX Falcon 9 Cassiope Launch 29 Sep 2013.webmOriginal file (WebM audio/video file, VP8/Vorbis, length 1 min 40 s, 64...

3. Source: satobs.org
   Link: https://satobs.org/seesat_ref/misc/180314-flcon9s2-indian-ocean.pdf
   Source snippet

   Satellites OverheadSep 29, 2013 Ground observations of Falcon-9 second...20 Mar 2018 — It is unclear at this stage whether this could be...

4. Source: rocketlaunch.live
   Title: CASSIOP E Mission (Falcon 9)
   Link: https://www.rocketlaunch.live/launch/cassiope
   Source snippet

   CASSIOPE Mission (Falcon 9) - RocketLaunch.LiveA SpaceX Falcon 9 rocket launched the CASSIOPE mission on Sunday, September 29, 2013 at 4...

   Published: September 29, 2013

5. Source: satobs.org
   Title: zuma vs falcon9 stage2 clouds plumes overview
   Link: https://satobs.org/seesat_ref/misc/zuma_vs_falcon9-stage2_clouds_plumes_overview.pdf
   Source snippet

   GROUND OBSERVATIONS OF FALCON-9 SECOND...6 Feb 2018 — The luminous body, seen clearly at around 3:15 am local time, was surrounded by a...

6. Source: mdpi.com
   Link: https://www.mdpi.com/2673-7159/5/2/16
   Source snippet

   Aliens Invasive Species Bull 2013, 33, 7–8. [Google Scholar]; Puttoo, M.; Archer...Read mor...

7. Source: youtube.com
   Title: Interview: Mick West, Identifying UFOs
   Link: https://www.youtube.com/watch?v=lsMomLDKIz4
   Source snippet

   My UFO Mistake...

8. Source: youtube.com
   Title: Pre Sputnik UFOs Crash and Burn (w @Mick West)
   Link: https://www.youtube.com/watch?v=PTwwokag5Zk

9. Source: youtube.com
   Title: My UFO Mistake
   Link: https://www.youtube.com/watch?v=_YIS16GfzfQ
   Source snippet

   Pre Sputnik UFOs Crash and Burn (w @MickWest)...