0347 – Remembering Moreiros.

Moreiros 2
is a set of ditched and probably palisade enclosures dating from the 4th
millennium BC (but possibly also from the 3rd). Basically is still to
be excavated. Only some sections of ditches were cleaned (where they were
affected by a query) when the site was discovered by Rui Boaventura, and were
dated from the Late Neolithic in the context of my project on ditched
enclosures. The collected material was recently studied in a master thesis,
hopefully to be published in the coming times. But the geophysics done in 2011 provided the main information about the site, showing its complex temporalities
and plans (see here).

Today I
remembered those days, when a small and happy team was measuring Moreiros,
escorted by the local cows.

Becker and the cows.

 

The team: Rui Boaventura, Helmut Becker, António Valera. Nelson Cabaço.

Source portuguese enclosures

Comets & Asteroids – Summary for May 2016

During the month of May 2016,  3 new comets were discovered and cometary activity was detected for 1 previously discovered object (earlier designated as an asteroid).
NASA’s Hubble Space Telescope imaged comet 252P/LINEAR just after it swept by Earth on March 21, 2016 while the Subaru Telescope serendipitously captured high-resolution images of comet 67P/Churyumov-Gerasimenko. Moreover a non-gravitational acceleration has been detected influencing the motion of minor planet (85990) (see below for more about these news). “Current comet magnitudes” & “Daily updated asteroid flybys” pages are available at the top of this blog (or just click on the underline text here).
The dates below refer to the date of issuance of CBET (Central Bureau Electronic Telegram)  which reported the official news & designations.
– Comet Discoveries
May 09  Discovery of P/2016 J1 (PANSTARRS)*
May 09  Discovery of C/2016 J2 (DENNEAU)
May 31  Discovery of P/2016 J3 (STEREO)
* According to the discovery CBET,  follow-up images obtained at the 3.6-m Canada-France-Hawaii Telescope atop Mauna Kea on May 6.43 showed a second comet in the field. “The two components are moving at nearly identical rates in nearly identical directions (both about 0″.6/minute in p.a. about 314 deg). The brighter component (designated component A) displays a clear and quite thin tail about 10″ long in p.a. 250 deg in the May 6.43 images.  The fainter object (designated component B) also displays a clear but broader tail of similar length, oriented toward p.a. about 210 deg”. The available astrometry for both components and ephemerides appear on MPEC 2016-J90
– Cometary activity detected
May 29  Cometary activity detected in 2016 KA = C/2016 KA (CATALINA)

 

Credit: P. Birtwhistle

– Other news

May 12  Astronomers using NASA’s Hubble Space Telescope captured images of comet 252P/LINEAR just after it swept by Earth on March 21.
Credit: NASA, ESA, and J.-Y. Li (Planetary Science Institute)
May 12 Hyper Suprime-Cam on the Subaru Telescope serendipitously captured high-resolution images of comet 67P/Churyumov-Gerasimenko during the inaugural queue-mode observations last March. The camera was scheduled to observe a distant compact galaxy when the chance came up to capture a view of the comet, and the images reveal fine details in the comet’s coma and tails.
Credit: Subaru Telescope, NAOJ

May 25 Animation of the yearly discovery rate of #NEOs by size (H). Data from @MinorPlanetCtr via @JLGalache

 

May 27 CBET 4279 reports that a non-gravitational acceleration has been detected influencing the motion of minor planet (85990)
And finally a cartoon by the illustrator and cartoonist Tom Gauld + a Chelyabinsk event mention in “Zero K”, the new novel by Don DeLillo (h/t to Paolo Simonetti)
Credit: Tom Gauld

 

Credit: Don DeLillo
Credit: Don DeLillo

by Ernesto Guido

Source Remanzacco Observatory