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Bright Sungrazing Comet
Australian amateur astronomer Alan Watson discovered on December 30, 2009 images a bright sungrazing comet in the images taken by STEREO-A spacecraft.
Dynamical Constraints on the Origin of Main Belt Comets
In an effort to understand the origin of the Main Belt Comets (MBCs) 7968 Elst-Pizzaro, 118401, and P/2005 U1, the dynamics of these three icy asteroids and a large number of hypothetical MBCs were studied. Results of extensive numerical integrations of these objects suggest that these MBCs were formed in-place through the collisional break up of a larger precursor body.
Comet Lulin (2007 N3): a Detailed Look at a Corkscrew Morphology & the Fascinating 3-D Problem of Lulin’s Rotation by Lowell Observatory
During a presentation on Tuesday at the American Astronomical Society’s Division of Planetary Sciences meeting in Puerto Rico, Knight and colleague, David Schleicher, Lowell Observatory astronomer, described their research, Narrowband Observations of Comet Lulin (2007 N3).
Comet 10P/Tempel 2’s Nucleus Rotation Determined to Within 10 Seconds
Lowell astronomer David Schleicher led a team that made the best measurement of the comet’s rotation period, showing that the rotation period of Tempel 2’s nucleus has lengthened, or the comet has slowed down, by about 10 seconds every five years.
Comets & Neo: New Comet Discovery: P/2009 QG31
IAU circular No. 9078, issued on 2009, Sept. 29, announces that an asteroidal object, discovered with a 0.45-m f/2.8 reflector + CCD by the "La Sagra Sky Survey" (Spain), has been reported to show cometary features by several observers, involved in its astrometric follow-up.
What (Maybe) Didn't Kill the Dinosaurs: Comets
A new model for comet production revises the theory of their origins
Spitzer observations of the asteroid-comet transition object and potential spacecraft target 107P (4015) Wilson-Harrington
Near-Earth asteroid-comet transition object 107P/ (4015) Wilson-Harrington is a possible target of the joint European Space Agency (ESA) and Japanese Aerospace Exploration Agency (JAXA) Marco Polo sample return mission. Physical studies of this object are relevant to this mission, and also to understanding its asteroidal or cometary nature.
New Comet Discovery: P/2009 S2 (McNAUGHT)
IAUC nr. 9075, issued on 2009 Sept. 24th, announces the discovery of another comet by Robert McNaught, named P/2009 S2.
Comet Holmes produced mini-comets
The outburst of Comet 17P/Holmes was so violent that it blew huge chunks of the comet’s surface clean off, according to a new analysis of images taken in November 2007.
Jupiter captured comet for 12 years in mid-20th Century
Comet 147P/Kushida-Muramatsu was captured as a temporary moon of Jupiter in the mid-20th century and remained trapped in an irregular orbit for about twelve years.
Giant planet holds comets hostage
Jupiter has been caught ‘kidnapping’ comets when they venture too close, forcing them to become temporary satellites of the great planet before they are slingshot away or spiral into Jupiter, according to new data presented at this week’s European Planetary Science Congress (EPSC) in Potsdam, Germany.
New Comet Discovery: C/2009 R1 (McNAUGHT)
IAU Circular nr.9071, issued on 2009, Sep. 10, announces the discovery of a new comet by R. H. McNaught, named C/2009 R1 (McNAUGHT). This comet may reach magnitude 5 at the end of June 2010, but the elongation will be very small (only 18 degree on June 27, 2010) and so the observing conditions.
McNaught Bags His 50th Comet
McNaught has just discovered his 50th comet. He spotted it, as he does most often these days, on images taken with the 20-inch (0.5-meter) Uppsala Schmidt telescope at Siding Spring Observatory in Australia.
Reassessing the Source of Long-Period Comets
We present numerical simulations to model the production of observable long-period comets (LPCs) from the Oort Cloud, a vast reservoir of icy bodies surrounding the Sun. We show that inner Oort Cloud objects can penetrate Jupiter’s orbit via a largely unexplored dynamical pathway, and they are an important, if not the dominant, source of known LPCs.
2009 Comet Awards Announced
The Central Bureau for Astronomical Telegrams (CBAT) -- operated by the Smithsonian Astrophysical Observatory (SAO) in Cambridge, Massachusetts, for the International Astronomical Union (IAU) -- has announced the recipients of the 2009 Edgar Wilson Award for the discovery of comets by amateurs during the calendar year ending June 11.
Five Amateurs Win Comet Prize
The 2009 Edgar Wilson Award honors amateur astronomers who discovered five different comets in the last 12 months, proving that backyard comet hunting still thrives in this age of automated professional sky patrols.
Arxiv - Continuous Monitoring of Comet Holmes from Before the 2007 Outburst
The outburst and subsequent brightness evolution of Comet 17P/Holmes has been observed using the MMT Observatory's All-Sky Camera (Pickering 2006) on Mt. Hopkins near Tucson, Arizona, USA.
Three new comets discovered
Three new comets have been discovered in the last few days.....
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