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Fireballs

Fireball 4

Meteor fireball turns night into day in Mallorca, Spain

Fireball image taken from Benicàssim, Castellón.
© @vicent_ibanyez
Fireball image taken from Benicàssim, Castellón.
At around 21:30 on Tuesday a "fireball" crossed the skies of Mallorca and witnesses who saw it the middle of the Serra de Tramuntana mountains, Deya and Soller, said it was on a north or west to south trajectory.

Francesc Xavier Salas from Deya described it as "an impressive fireball that showed very powerful sky blue light inside and an outer layer and tail with a greenish hue.

Thousands of meteors enter the earth's atmosphere every day but most of them are not seen by the public because they fall over the ocean or in remote areas.


Comment: Eh, but those aren't fireballs, which are much larger bolides than the ones they're talking about.


A fireball is a very bright meteor which ranges in colour from red to blue and its composition determines its colour; sodium produces a bright yellow light, nickel is green and magnesium is blue-white.

"This is the second one I've seen in my life, the last time was 43 years ago," said one witness.


Fireball 2

Bright meteor fireball lights up night sky over Alberta, Canada

Alberta meteor fireball
© Lea Storry/Twitter
Lea Storry was in her home office in downtown Edmonton when she saw the flash of light streak across the sky Monday morning.
A fireball buzzed over the Prairies on Monday, temporarily piercing the dark of the early morning sky with a flash of blinding blue light.

The meteor darted across the sky around 6:30 a.m. MT, startling early risers who were lucky to catch a glimpse of the sudden glow.

The light was captured by security cameras across Edmonton, and social media soon lit up with reports from observers who caught a glimpse of it.

The spectacle was seen in at least two provinces, with scattered reports from Jasper to Saskatoon.

As of 8:30 a.m., there were 42 unverified reports of fireball sightings on the American Meteor Society (AMS) website.


Fireball 2

Residents throughout UK observe bright meteor fireball

AMS event 907-2021 observers map
© AMS (screen capture)
AMS event 907-2021 observers map
The American Meteor Society (AMS) received 112 reports (event 907-2021) about a meteor fireball seen over England, Groningen, Northern Ireland and Scotland on Thursday, February 18th 2021 around 21:20 UT.

For this event, AMS received one video. Credit: Andrew Simpson.


Fireball 4

Meteor fireball over the south of Spain (Feb. 16)

fireball
On 16 February 2021, at about 6:00 local time (equivalent to 5:00 universal time), a fast fireball was spotted over the south of Spain. This bolide was generated by a rock from a comet that hit the atmosphere at about 213,000 km/h. The fireball began at an altitude of about 117 km over the province of Badajoz, and ended at a height of around 82 km.

This meteor was recorded in the framework of the SMART project, operated by the Southwestern Europe Meteor Network (SWEMN) from the meteor-observing stations located at Sevilla, La Hita (Toledo), Sierra Nevada, La Sagra (Granada), and Calar Alto (Almería). The event has been analyzed by the principal investigator of the SMART project: Dr. Jose M. Madiedo, from the Institute of Astrophysics of Andalusia (IAA-CSIC).


Comet 2

Long-period comet breakup is the origin of the dinosaur extinction says study

A new study blames a comet fragment for the death of the dinosaurs 66 million years ago. But most experts maintain that an asteroid caused this cataclysmic event.
Impact Event
© Roger Harris/Science Source
An artist’s rendering of the impact event 66 million years ago that ended the reign of dinosaurs.
In one searing apocalyptic moment 66 million years ago, Earth was transformed from a lush haven into a nightmare world with a fiery wound that bled soot into the skies. The extraterrestrial object that slammed into our planet spelled doom for dinosaurs and countless other species, even as its fallout opened new niches to our mammal ancestors.

For decades, scientists have debated the identity of the impactor that struck our planet that fateful day, leaving a 90-mile scar called the Chicxulub crater under what is now the Yucatán Peninsula in Mexico.

Although an asteroid remains the leading candidate, a team based at the Center for Astrophysics, in Cambridge, Mass., has proposed that the culprit may have been an icy comet that flew too close to the sun.

When long-period comets from the outer reaches of the solar system approach the sun, they can be torn asunder by the star's immense tidal forces. The resulting shards may have been catapulted across Earth's orbit, providing "a satisfactory explanation for the origin of the impactor" that killed the dinosaurs, according to a study published on Monday in Scientific Reports.

"To this day, the origin of the Chicxulub impactor remains an open question," said Amir Siraj, an undergraduate studying astrophysics at Harvard who led the research. His model, he said, examines "this special population of comets" that could have produced enough shards — of the right size, at the right rate and on the right trajectories — to threaten Earth "in a way that's consistent with current observational constraints."

Fireball

Meteor fireball over Andalusia, Spain (Feb. 13)

fireball
The fireball shown on this video was recorded over the south of Spain on 2021 February 13, at 19:30 local time (equivalent to 18:30 universal time). It was generated by a rock from an asteroid that hit the atmosphere at about 72,000 km/h.

It began over the north of the province of Granada at an altitude of about 95 km, and ended at a height of around 55 km. The event was recorded in the framework of the SMART project from the meteor-observing stations located at La Hita (Toledo), Calar Alto (Almeria), La Sagra (Granada), Sierra Nevada (Granada) and Sevilla.


Fireball 4

Bright meteor fireball streaks over Melbourne, Australia

Melbourne meteor fireball
© YouTube/Save Earth (screen capture)
Residents of Victoria, Australia, reported seeing a "massive fireball" streak across the night sky on February 14.

Dashcam footage posted to Facebook by Leesa Vaughan, and recorded from the Monash Freeway in Melbourne, shows the object flash in the night sky.

"That was a massive fireball," Vaughan can be heard saying in the video.

"This is likely a sporadic meteor, probably not much larger than a marble, entering the earth's atmosphere and burning up," the Astronomical Society of Victoria wrote in a Facebook post about the event. Credit: Leesa Vaughan via Storyful.


Fireball 5

Large meteor fireball reported over UK and Western Europe

AMS event 809-2021 observers map
© AMS (screen capture)
AMS event 809-2021 observers map
The American Meteor Society (AMS) received 82 reports (event 809-2021) about a meteor fireball seen over Île-de-France, Drenthe, England, Friesland, Gelderland, Grand Est, Groningen, Hauts-de-France, Hessen, Limburg, Niedersachsen, Noord-Brabant, Nordrhein-Westfalen, Normandie, Overijssel, Scotland, Vlaanderen, Wales, Wallonie, Zeeland and Zuid-Holland on Friday, February 12th 2021 around 05:10 UT.

Three videos were uploaded to the AMS website.

This one is credited to Glen Wilkinson.


Fireball 5

Meteor fireball streaks over California

California meteor fireball
© AMS/Mike L.
The American Meteor Society (AMS) received 24 reports (event 778-2021) about a meteor fireball seen over CA, NV and UT on Thursday, February 11th 2021 around 05:21 UT.

A video was uploaded to the AMS website. Credit: PxT.


Comet 2

New Comet C/2021 B3 (NEOWISE)

CBET 4929 & MPEC 2021-C16, issued on 2021, February 04, announce the discovery of a comet (magnitude ~19) in infrared images obtained during Jan. 22 UT with the Near-Earth Object Wide-field Infrared Survey Explorer (or NEOWISE; formerly the WISE earth-orbiting satellite). The new comet has been designated C/2021 B3 (NEOWISE).

We performed follow-up measurements of this object while it was still on the PCCP webpage.

Stacking of 50 unfiltered exposures, 30 seconds each, obtained remotely on 2021, January 27.1 from X02 (Telescope Live, Chile) through a 0.6-m f/6.5 astrograph + CCD, shows that this object is a comet with a compact coma about 10" arcsecond in diameter. (Observers E. Guido, M. Rocchetto, E. Bryssinck, M. Fulle, G. Milani, C. Nassef, G. Savini, A. Valvasori).

Our confirmation image (click on it for a bigger version; made with TYCHO software by D. Parrott):
Comet C/2021 B3 NEOWISE
© Remanzacco Blogspot