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Tue, 07 Dec 2021
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Fireballs

Fireball 2

Meteor fireball over Alabama and Tennessee on November 30

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We received 2 reports about a fireball seen over AL and TN on Tuesday, November 30th 2021 around 15:18 UT.

For this event, we received one video.


Fireball

Meteor fireball seen over Tennessee and other states on December 1

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© Ed A.
We received 52 reports about a fireball seen over AL, FL, GA, IN, KY, MS, NC, OH, SC, TN and VA on Wednesday, December 1st 2021 around 03:14 UT.

For this event, we received 2 videos and one photo.


Comet 2

New study shows the largest comet ever observed was active at near-record distance

UMD astronomers discovered that comet Bernardinelli-Bernstein is among the most distant active comets from the sun, providing key information about its composition.
comet Bernardinelli-Bernstein
© NOIRLab/NSF/AURA/J. da Silva/Spaceengine
The Comet Bernardinelli-Bernstein (BB), represented in this artist rendition as it might look in the outer Solar System, is estimated to be about 1000 times more massive than a typical comet. The largest comet discovered in modern times, it is among the most distant comets to be discovered with a coma, which means ice within the comet is vaporizing and forming an envelope of dust and vapor around the comet’s core.
A new study by University of Maryland astronomers shows that comet Bernardinelli-Bernstein (BB), the largest comet ever discovered, was active long before previously thought, meaning the ice within it is vaporizing and forming an envelope of dust and vapor known as a coma. Only one active comet has been observed farther from the sun, and it was much smaller than comet BB.

The finding will help astronomers determine what BB is made of and provide insight into conditions during the formation of our solar system. The finding was published in The Planetary Science Journal on November 29, 2021.

"These observations are pushing the distances for active comets dramatically farther than we have previously known," said Tony Farnham, a research scientist in the UMD Department of Astronomy and the lead author of the study.

Knowing when a comet becomes active is key to understanding what it's made of. Often called "dirty snowballs" or "icy dirtballs," comets are conglomerations of dust and ice left over from the formation of the solar system. As an orbiting comet approaches its closest point to the sun, it warms, and the ices begin to vaporize. How warm it must be to start vaporizing depends on what kind of ice it contains (e.g., water, carbon dioxide, carbon monoxide or some other frozen compound).

Fireball 3

Bright meteor fireball over Henan, China on November 29

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In the early morning of November 29, an unknown object with bright light appeared in the sky in many parts of Henan.


Fireball

Meteor fireball over Seville, Spain on Nov. 28

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The bolide shown on this video was recorded from Spain on 28 Nov. 2021 at 1:24 local time (0:24 universal time). It was produced by a fragment (a meteoroid) from an asteroid that hit the atmosphere at about 57,000 km/h. The fireball overflew the province of Sevilla (Andalusia). It began at an altitude of about 81 km over the north of the province of Sevilla, near from the zenith of the town of Constantina. From that location it moved southwest, and ended at a height of around 37 km near from the zenith of the town of Villanueva del Río y Minas (Sevilla).

The event was recorded in the framework of the SMART project, operated by the Southwestern Europe Meteor Network (SWEMN). 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).


Fireball 2

Meteor fireball over Nevada on November 29

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We received one report about a fireball seen over NV on Monday, November 29th 2021 around 10:03 UT.

For this event, we received one video.


Fireball 4

Meteor fireball over Italy, Switzerland and France on November 29

FIREBALL
We received 24 reports about a fireball seen over Auvergne-Rhône-Alpes, Bourgogne-Franche-Comté, Genève, Liguria, Lombardia, Piemonte, Tessin, Toscana, Vaud and Veneto on Monday, November 29th 2021 around 22:36 UT.

For this event, we received one video and 2 photos.


Fireball 2

Stunning meteor fireball over the Atlantic Ocean (Nov.28)

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This stunning bright fireball was recorded from Spain on 28 Nov. 2021 at 23:39 local time (22:39 universal time). It was produced by a fragment from a comet that hit the atmosphere at about 72,000 km/h. The event overflew the Atlantic Ocean, between the coasts of Spain and Morocco. It began at an altitude of about 90 km over the ocean, and ended at a height of around 46 km over the sea.

The event was recorded in the framework of the SMART project, operated by the Southwestern Europe Meteor Network (SWEMN). 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).


Fireball 2

Meteor fireball over Alabama and other states on November 28

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We received 34 reports about a fireball seen over AL, AR, GA, MS and TN on Sunday, November 28th 2021 around 23:50 UT.

For this event, we received one video.


Fireball 2

Meteor fireball over the south of Spain (Nov. 26)

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This stunning fireball was spotted over Spain on 26 Nov. 2021 at 21:26 local time ( 20:26universal time). It was produced by a rock (a meteoroid) from a comet that hit the atmosphere at about 101,000 km / h. The event overflew the province of Albacete (region of Castilla-La Mancha).

It began at an altitude of about 107 km over the southeast of Albacete, moved west, and ended at a height of around 59 km over the southwest of the same province. The event was recorded in the framework of the SMART project, operated by the Southwestern Europe Meteor Network (SWEMN). 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).