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Wed, 19 Feb 2020
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Comets

Comet 2

New Comet C/2018 V1 (Machholz-Fujikawa-Iwamoto)

3Day Orbit
© NASA
CBET 4569 (issued on 2018, November 08) and MPEC 2018-V151 (2018, November 11), announce the discovery of a 10th-magnitude comet by Donald E. Machholz (Colfax, CA, U.S.A) and independently by Shigehisa Fujikawa (Kan'onji, Kagawa, Japan) and Masayuki Iwamoto(Awa, Tokushima, Japan).

The new comet has been designated C/2018 V1 (Machholz-Fujikawa-Iwamoto).

- D. Machholz reported his VISUAL DISCOVERY on Nov. 7.531 UT with a 0.47-m reflector (113x). He also observed the comet with similar appearance on Nov. 8.533

- Shigehisa Fujikawa found the object (with no description provided) on Nov. 7.82 UT on a CCD image obtained with a 120-mm-f.l. f/3.5 lens. His discovery was reported to the Central Bureau's TOCP webpage, which produced the provisional designation TCP J12192806-0211143.

- Masayuki Iwamoto discovered the new object on images obtained on Nov. 7.841 with a 10-cm f/4.0 Pentax SDUF II telephoto lens and a Canon EOS 6D camera; Iwamoto called it a possible comet of mag 10 with approximate position R.A. = 12h19m30s, Decl. = -2d11' (equinox 2000.0) and his observations was reported on TCP J12192806-0211143 TOCP webpage. He added that he also observed it one minute later and detected no movement.

Prompted by the Iwamoto's remark in the TOCP webpage about the possible cometary nature of this transient I decided to perform follow-up measurements of this object. The telescope I chose was T14 astrograph in New Mexico due to its wide field FOV (155.8 x 233.7 arc-mins). In fact as only 1 astrometric position was available at that time and my observation was scheduled 16 hours after it was taken, in case of a comet it was important to have as much field as possible around that only reported astrometry point.

As it happens, it was a comet and I found it about 51 arcmin from the reported astrometry available (60 arcmin is 1 degree). Single unfiltered 60 second exposure, obtained remotely on 2018, November 08.5 from H06 (iTelescope network) through a 0.10-m f/5 reflector + CCD, shows that this object is a comet with a diffuse coma about 2 arcmin in diameter.

Comet 2

Czech Mate - Confirmation of the Younger Dryas impact event

Gunther Kleteschka
© The Cosmic Tusk
See another blockbuster confirmation of the Younger Dryas cosmic impact below. I keep a pretty close eye on our subject but had no idea such intricate, original and thorough work was underway in the Czech Republic. Gunther Kleteschka has appeared on several YDB papers, but has clearly been busy in his own laboratory collecting entirely new, informative and well dated expressions of the YDB boundary in lake sediments. His work and that of his local colleagues is clearly exciting and in keeping with the predictions made by the Younger Dryas Impact Hypothesis.

Cosmic-Impact Event in Lake Sediments from Central Europe Postdates the Laacher See Eruption and Marks Onset of the Younger Dryas

Gunther Kletetschka,1,2,3,* Daniel Vondrák,4 Jolana Hruba,2 Vaclav Prochazka,2 Ladislav Nabelek,1,2 Helena Svitavská-Svobodová,5 Premysl Bobek,5 Zuzana Horicka,6,7 Jaroslav Kadlec,8 Marian Takac,2 and Evzen Stuchlik7

Institute of Geology, Czech Academy of Sciences, CZ-252 43 Průhonice 770, Czech Republic; 2. Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Charles University, Albertov 6, CZ-128 43 Prague 2, Czech Republic; 3. Geophysical Institute, University of Alaska Fairbanks, 903 North Koyukuk Drive, Fairbanks, Alaska 99775-7320, USA; 4. Institute for Environmental Studies, Charles University, Benátská 2, CZ-128 01 Prague 2, Czech Republic; 5. Institute of Botany, Czech Academy of Sciences, Zámek 1, CZ-252 43 Průhonice, Czech Republic; 6. Branch of Applied Ecology, T. G. Masaryk Water Research Institute, Podbabská 30, CZ-160 00 Prague 6, Czech Republic; 7. Institute of Hydrobiology, Biology Centre, Czech Academy of Sciences, Na Sádkách 7, CZ-370 05 České Budějovice, Czech Republic; 8. Institute of Geophysics, Czech Academy of Sciences, Boční II 1401, CZ-141 31 Prague 4, Czech Republic

Comment: Of Flash Frozen Mammoths and Cosmic Catastrophes


Comet 2

Asteroid Phaethon acts like a comet, contributes to a meteor shower, and it's blue

asteroid
Having studies countless asteroids in near-Earth space, astronomers have come to understand that the majority of these rocks fall into one of two categories: S-type (grey) and C-type (red). These are defined by the types of materials on their surfaces, with S-type asteroids being primarily composed of silicate rock and C-type asteroids being made up of carbon materials.

However, there is also what are known as blue asteroids, which make up only a fraction of all known Near-Earth Objects (NEO). But when an international team astronomers observed the blue asteroid (3200) Phaeton during a flyby of Earth, they spotted behavior that was more consistent with a blue comet. If true, then Phaeton is of a class of objects that are so rare, they are almost unheard of.

The team's findings were presented at the 50th annual meeting of the American Astronomical Society's Division for Planetary Science, which is taking place this week (Oct. 21st to Oct. 26th) in Knoxville, Tennessee. The presentation, titled "Physical Characterization of (3200) Phaethon: Target of the DESTINY+ Mission", was led by Theodore Kareta of the Lunar and Planetary Laboratory (LPL).

Comment: See also:


Comet 2

"Comet of the year" 46P/Wirtanen making close approach, may become visible in December

Comet 46P/Wirtanen
© Yasushi Aoshima
Comet 46P/Wirtanen
Taken by Yasushi Aoshima on October 7, 2018 @ Ishikawa, JAPAN
Astronomers are calling Comet 46P/Wirtanen the "comet of the year." Two months from now, on Dec. 16th, the kilometer-wide ball of dirty ice will come within 11.5 million km of Earth--making it one of the 10 closest-approaching comets of the Space Age. Comet 46P/Wirtanen will probably become a naked eye object for several weeks during the holidays. Here's what it looks like now:

Yasushi Aoshima of Ishikawa, Japan, took the picture using a 12-inch telescope. It shows the comet's green atmosphere which is, impressively, almost twice as wide as the planet Jupiter. The green color comes from diatomic carbon (C2)--a gaseous substance common in comet atmospheres that glows green in the near-vacuum of space.

At the moment, the integrated brightness of the comet is similar to a 10th magnitude star--that is, dim. However, forecasters expect it to brighten more than 200-fold by December. If current trends hold, 46P could ultimately reach magnitude +3, making it not a Great Comet but a very good one, visible to the unaided eye and an easy target for binoculars or small telescopes.

Comment: Close calls are becoming increasingly common, and, while they may be a awesome sight, historically they portend disaster: Also check out SOTT radio's: Behind the Headlines: Who was Jesus? Examining the evidence that Christ may in fact have been Caesar!


Comet 2

5 meteor showers that will light up the night sky this fall

Meteor showers
Autumn is meteor shower season across the Northern Hemisphere with the season's longer nights benefiting those trying to spot a few shooting stars.

The upcoming months feature many minor to moderate meteor showers, but concludes with the Geminids, which features hundreds of multi-colored meteors every night.

Meteor showers occur when the Earth passes through a trail of debris left behind by a comet. The debris is largely just grains of dust that burn brightly when entering the planet's atmosphere.

People 2

Portraits of alleged migrant attacks' victims displayed at German immigration protests

illegal immigration protest

Protestors in Germany carry portraits of those allegedly killed by illegal immigrants
The unrest in the Saxon city was prompted by the death of Daniel Hillig, a German national, allegedly killed by two migrants on August 26. The incident led to ongoing mass demonstrations and clashes between different groups of protesters and police.

At least 4,500 participants took part in an anti-immigrant demonstration on Saturday in Chemnitz, the local police stated, adding that A total of 18 people including three police officers were injured during the day.

Comment: Deutsche Welle reports:
Chemnitz police order far-right protesters to go home

Two competing demonstrations in Chemnitz were very much a clash of two Germanys. No police presence could obscure the fundamental conflict, indeed naked hatred, between these two sets of people.

Police in the Chemnitz said Saturday they had ordered the organizers of an anti-migrant protest to call off their march.

The rally, which drew about 4,500 participants, surpassed its authorized time limit, leading to concerns about public safety, officials said. They added that some 3,500 counterdemonstrators had attempted to interfere with the march by blocking its planned route.

As night fell, protesters from both sides were refusing to leave the area, prompting police to bring in water cannons, the DPA news agency reported.

"Our units were at times forced to use direct force," police said on Twitter. "We repeat our call, continue to refrain from violence."

More than 1,200 police officers were deployed to Chemnitz ahead of Saturday's protests, which came one week after a 35-year-old German man was fatally stabbed in the city. Two men from Syria and Iraq have been arrested over the death.

The incident sparked attacks on foreigners and violent clashes that shocked the rest of the country.

Saturday's right-wing rally was led by the anti-immigrant Alternative for Germany (AfD) party and the populist PEGIDA movement. Organizers called it a "mourning march," with many participants holding German flags and pictures of alleged victims of migrant violence.

Large crowds, including hundreds of rival demonstrators, also turned out for a rally opposing xenophobia and anti-migrant sentiment.

Many on the right are angry with Chancellor Angela Merkel's decision to welcome hundreds of thousands of mainly Middle Eastern asylum-seekers to Germany in 2015. The influx led to a backlash in some parts of the country that resulted in the AfD winning seats in parliament for the first time.



Comet 2

Comet: C/2018 N2 (ASASSN)

MPEC 2018-O01, issued on 2018, July 16, announces the discovery of a comet (magnitude ~16.1) in the course of the "All-Sky Automated Survey for Supernovae" (ASASSN) program, in images taken 2018 July 7-11 with the 14-cm "Cassius" survey telescope at Cerro Tololo. The new comet has been designated C/2018 N2 (ASASSN).

I performed follow-up measurements of this object, while it was still on the PCCP webpage. Stacking of 10 unfiltered exposures, 60 seconds each, obtained remotely on 2018, July 15.7 from Q62 (iTelescope network) through a 0.43-m f/6.8 astrograph + CCD, shows that this object is a comet with a diffuse coma about 15 arcsec in diameter.

My confirmation image (click on it for a bigger version)
Comnet C/2018 NZ
© Remanzacco Blogspot

Info

NASA may have recovered meteorite from the ocean

Underwater Meteorite
© Pixabay Composite
Just two days into their search for a giant meteorite that crashed off the coast of Washington State, Dr. Marc Fries and the crew of the Nautilus have accomplished their mission: they believe they have successfully recovered pieces of the two-ton meteorite that created a huge fireball the size of a minivan as it streaked into the Pacific. Further analysis is in the works but - if these fragments are genuine - they'll be the first-ever pieces of a meteorite recovered from the ocean.

Based on Fries' calculations of the meteorite's trajectory, the Nautilus narrowed its search to a 0.4 square-mile patch of the ocean. The area was first searched with sonar, then with two ROVs (remotely operated vehicles) named Argus and Hercules. The team then used "a suction hose sampler, magnetic plate, and sediment scoop" to pick up the most promising pieces of rock.

The two fragments found so far are thought to be the outer shell of the meteorite (called the fusion crust) which the Nautilus Live blog describes as "meteorite exterior that melted and flowed like glaze on pottery as it entered the atmosphere."

Comet 2

'Oumuamua reclassified from 'asteroid' to 'comet' (because they're essentially the same thing)

Researchers have found that 'Oumuamua - the first confirmed object to enter the solar system from interstellar space - was a comet, releasing just enough gas to subtly change its course.
'Oumuamua
© ESA / Hubble / NASA / ESO / M. Kornmesser
An artist's impression shows 'Oumuamua as a comet.
In October 2017 the robotic telescope Pan-STARRS in Hawai'i detected an unusual object entering the solar system from interstellar space. In the days after the discovery, every available telescope, including Hubble, was aimed at the interloper to collect as much information as possible before it left our system. Since then, astronomers worldwide have been reviewing the observations, trying to squeeze as much knowledge as possible about the unexpected visitor.

Named 'Oumuamua ("first scout" or "first visitor" in Hawaiian), this envoy from the stars appeared to have the form of an elongated cigar - or a flattened pancake, depending whom you ask - 800 meters (0.5 mile) long and 10 times thinner. It came tumbling into the solar system from above the plane of the planets, only to have its path changed by the by the Sun's gravitational pull before leaving out system again, never to return.

Comment: How these numpties still don't get it is beyond us.

Asteroids and comets ARE THE SAME THINGS. The former just 'become' the latter when they discharge electrically due to relative electric potential difference as they pass through space.


Meteor

US National Science and Technology Council calls for improved asteroid detection, tracking and deflection

NASA asteroid tracking deflection

On Wednesday, June 20, 2018, the U.S.'s National Science and Technology Council released a report calling for improved asteroid detection, tracking and deflection. NASA is taking part in the effort, along with federal emergency and White House officials.
The U.S. government is stepping up efforts to protect the planet from incoming asteroids that could wipe out entire regions or even continents.

The National Science and Technology Council released a report Wednesday calling for improved asteroid detection, tracking and deflection. NASA is participating, along with federal emergency, military, White House and other officials.

For now, scientists know of no asteroids or comets heading our way. But one could sneak up on us, and that's why the government wants a better plan.


Comment: And they are sneaking up on us with increasing frequency.


NASA's planetary defense officer, Lindley Johnson, said scientists have found 95 percent of all these near-Earth objects measuring one kilometer (two-thirds of a mile) or bigger. But the hunt is still on for the remaining 5 percent and smaller rocks that could still inflict big damage.

Comment: Looks like someone has been paying attention to the alarming number of space rocks in our skies recently: