Comets


Comet 2

New comet discovered: C/2013 G3 (PANSTARRS)

Cbet nr. 3472, issued on 2013, April 04, announces the discovery of a new comet (discovery magnitude ~20.7) by PANSTARRS survey on CCD images obtained with the 1.8-m Pan-STARRS1 telescope on Haleakala on April 10.4. The new comet has been designated C/2013 G3 (PANSTARRS).

We performed follow-up measurements of this object, while it was still on the neocp. Stacking of 11 R-filtered exposures, 50-sec each, obtained remotely on 2013, April 11.4 from E10 Faulkes Telescope South through a 2.0-m f/10.0 Ritchey-Chretien + CCD, shows that this object is slightly diffused.The FWHM of this object was measured about 20% wider than that of nearby field stars of similar brightness. Below you can see our image.
C/2013 G3
© Remanzacco Observatory

Comet 2

New Comet: C/2013 G2 (McNaught)

Discovery Date: April 8, 2013

Magnitude: 17.0 mag

Discoverer: Robert H. McNaught (Siding Spring)

C/2013 G2
© AerithNetMagnitudes graph.
The orbital elements are published on M.P.E.C. 2013-G39.

Gem

Stupid science: In wake of imminent threat from cometary bombardment, NASA proposes "tugging" a small, random asteroid into Moon's orbit, then sampling its composition... sometime next decade

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Most people, normal people, saw this event and thought "ok, what's going on here? This is clearly unusual!" NASA apparently saw it and thought "Hmm, maybe this is an opportunity for us to get our budget increased? Quick, someone draft a BS proposal and send it to the White House! Tell them it's in the interest of protecting the planet or something like that."
The proposed $17.7 billion NASA budget unveils plans to develop technologies partly intended to ultimately protect the Earth from potentially dangerous collisions with asteroids.


Comment: Note the carefully chosen words - "partly intended to ultimately protect"... in other words, lip-service to protecting Americans from the real threat out there.


The National Aeronautics and Space Administration envisions launching robotic missions to a small asteroid before the end of the decade, later tugging it into an orbit near the moon and eventually sending astronauts to bring home samples after 2025.


Comment: So, the best idea for planetary defense NASA can come up with, at this eleventh hour, is to launch rockets towards an asteroid sometime before 2020, "tug" it into an orbit near the moon (good luck with that!) and then send astronauts to said small asteroid (presumably by landing on it?) to "bring home samples."

City-destroying fragments will have been and gone long before any of these 'plans' get off the ground.


The agency's overall spending proposal, basically flat from previously enacted spending levels, identifies such asteroid exploration as the capstone for years of heavy NASA spending on a powerful new rocket and manned capsule championed by congressional leaders.

Comet

New Comet: C/2013 F2 (Catalina)

Discovery Date: March 24, 2013

Magnitude: 18.1 mag

Discoverer: A. Boattini (Catalina Sky Survey)
C/2013 F2
© Aerith NetMagnitude graph
The orbital elements are published on M.P.E.C. 2013-F58.

Comet 2

New Comet: C/2013 F1 (Boattini)

Discovery Date: March 23, 2013

Magnitude: 17.9 mag

Discoverer: A. Boattini (Catalina Sky Survey)
C/2013 F1
© Aerith NetMagnitude graph
The orbital elements are published on M.P.E.C. 2013-F46.

Comet

New Comet: C/2013 G1 (KOWALSKI)

Cbet nr. 3454, issued on 2013, April 04, announces the discovery of a new comet (discovery magnitude ~18.5) by R. A. Kowalski on CCD images obtained with the Mount Lemmon 1.5-m reflector on April 02.4. The new comet has been designated C/2013 G1 (KOWALSKI).

We performed follow-up measurements of this object, while it was still on the neocp. Stacking of 12 R-filtered exposures, 120-sec each, obtained remotely from Haleakala-Faulkes Telescope North on 2013, April 4.5, through a 2.0-m f/10.0 Ritchey-Chretien + CCD, shows that this object is a comet with a tail nearly 12" long in PA 285 and a coma about 5" in diameter.

Below you can see our image.
C/2013 G1
© Remanzacco Observatory
M.P.E.C. 2013-G13 assigns the following preliminary parabolic orbital elements to comet C/2013 G1: T 2014 Jan. 19.01; e= 1.0; Peri. = 86.85; q = 2.18; Incl.= 6.22

Comet 2

New Comet: C/2013 F3 (McNAUGHT)

Cbet nr. 3450, issued on 2013, April 01, announces the discovery of a new comet (discovery magnitude ~17) by R. H. McNaught on CCD images obtained with the 0.5-m Uppsala Schmidt telescope at Siding Spring on March 29.7. The new comet has been designated C/2013 F3 (McNAUGHT).

We performed follow-up measurements of this object remotely, from the iTelescope network (New Mexico - MPC code H06) on 2013, April 01.4, through a 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer.

Below you can see our image, stack of 15x50-second exposures.
C/2013 F3
© Remanzacco Observatory
M.P.E.C. 2013-G02 assigns the following preliminary parabolic orbital elements to comet C/2013 F3: T 2013 May 21.47; e= 1.0; Peri. = 17.09; q = 2.27; Incl.= 85.02.

Comet 2

Dinosaur-killing space rock 'was a comet'

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The space rock that hit Earth 65 million years ago and is widely implicated in the end of the dinosaurs was likely a speeding comet. That is the conclusion of research which suggests the 180km-wide Chicxulub crater in Mexico was carved out by a smaller object than previously thought. Many scientists consider a large and relatively slow moving asteroid to have been the likely culprit.


Comment: The latest research indicates that it's not the multi-million-year larger space rocks that we need to be concerned about, but the swarms of smaller objects that wreak havoc on human civilizations far more often than people realise... Celestial Intentions: Comets and the Horns of Moses


Details were outlined at the 44th Lunar and Planetary Science Conference. But other researchers were more cautious about the results. "The overall aim of our project is to better characterise the impactor that produced the crater in the Yucatan peninsula [in Mexico]," Jason Moore, from Dartmouth College in New Hampshire, told BBC News.

The space rock gave rise to a global layer of sediments enriched in the chemical element iridium, in concentrations much higher than naturally occurs; it must have come from outer space.

Comet

Comet Pan-STARSS survives solar encounter, emerges brighter than ever

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Image Credit: Damian Cieślik - Bełchatów, Poland
A comet making its first visit to the inner solar system has survived a journey that brought it close to the sun, and has emerged as one of the brightest comets in years, NASA astronomers confirmed on Friday.

Comet Pan-STARRS, which according to the Daily Mail has been visible for several weeks in the Southern Hemisphere, could be viewed for the first time by stargazers in the northern parts of the world last week after dipping within the orbit of Mercury.

According to NASA, at its closest approach, Pan-STARRS was only 28 million miles away from the sun. Experts were unsure whether or not it would be able to survive such near proximity, with heat levels exceeding 10 times that felt here on Earth. The strong solar heat could have caused long-frozen gases in the comet's nucleus to vaporize, causing the comet itself to break up or be completely destroyed.

Not only did Comet Pan-STARRS survive, but it has emerged as "a gorgeous comet - one of the brightest in years," Matthew Knight, an astronomer with the Lowell Observatory in Flagstaff, Arizona, said in a statement. NASA reported on Friday the solar heating from its approach has caused the comet to glow brighter than a first magnitude star, making it easily visible using binoculars and small telescopes during the first hour or two after sunset.

Comet 2

Is Comet Pan-Starrs fragmenting?

Veteran astrophotographer Peter Rosen has been monitoring Comet Pan-STARRS, and his latest images obtained on March 15th seem to show a fragment emerging from the nucleus. It is the speck just below and to the right of the comet's head:
Comet Pan-Starrs
© Peter Rosen
"It is visible also in two or three other image stacks," says Rosen. He notes how the stars in the image are trailed, but the apparent fragment is not. "It seems to follow the comet, not the stars. A plane passed through the field of view during the exposure, making a red streak through the comet's tail."