The night Iberia turned blue-green

A brief flash crossed Spain and Portugal. Meteor observers turned recordings from several towns into a measured flight path, then tested it against space-sensor data. Watch the actual camera passage before following how the interpretation was built.

World: Earth
Location: Portugal / Spain
Case date or period: 18 May 2024 UTC

One night, two calendar dates

The camera recording belongs to 18 May 2024 in UTC. At about 22:46 UTC it was 23:46 on the same date in Portugal, while Spain’s summer-time clock had already reached 00:46 on 19 May. Those labels describe the same passage. ESA published the recording two days later; its upload date is not another sighting. The visible trail and flash are real camera imagery, rather than a reconstructed flight. The SPMN register labels this event 22:46:49 UTC; the paper separately gives a luminous start at 22:46:41. A catalogue time and the first measured frame are different records.

The people watching before anything happened

The Spanish Meteor Network is a collaboration between professional researchers and amateur sky observers. Its event register names camera operators at several sites and separately lists visual reports. ICE-CSIC’s account says twelve network stations recorded the event; the published analysis selected three SPMN recordings and one ESA/AllSky7 recording. Four analysed views therefore do not mean only four people saw it. Nor does an entry in the wider register establish that every listed camera supplied the same quality of measurement.

Turning a streak into a flight path

Peña-Asensio and colleagues calibrated the Navianos de Valverde, Estepa, Sanlúcar de Barrameda and Casas de Millán cameras against the sky, correcting lens distortion and atmospheric refraction. Their triangulation placed the luminous interval at 22:46:41–22:46:55 UTC, with an initial speed of about 40.4 kilometres per second. This is a reconstruction from multiple directions, not a speed read from the size of a streak in one video. The Atlas marker identifies the published recording-station coordinates, not the meteor’s location.

An independent comparison with a shared ingredient

The ground-derived direction and velocity agreed closely with CNEOS space-sensor data, but the peak-brightness positions differed by about 60 kilometres. Saturated camera frames complicate that comparison. Independence also has limits: the investigators estimated mass using the satellite-reported impact energy. Similar masses therefore do not constitute two wholly independent measurements. The underlying camera and sensor data have not been reprocessed here.

A possible cometary origin, without a recovered sample

ICE-CSIC’s August account describes an orbit most likely linked to the Jupiter-family comet region and a fragile carbonaceous body. It also records the authors’ alternative: a C-type asteroid altered by repeated close approaches to the Sun was not ruled out. These are interpretations of the reconstructed orbit and atmospheric behaviour. No recovered specimen in this case supplies a laboratory identification. The interesting question is how a roughly metre-sized object survived its near-Sun history long enough to produce the observed passage.

A satellite view is a different kind of image

Meteosat’s Lightning Imager detected the same event from geostationary orbit. ESA’s separate animation accumulates light flashes over six seconds; it is a processed instrument presentation, not another ordinary camera movie. Here, the playable evidence is the ground recording. Its roughly sixteen-second camera segment is followed by ESA branding and an end screen in the thirty-five-second publisher upload. Those graphics are not observations of the meteor.