scholarly journals The large crater on the small Asteroid (2867) Steins

Icarus ◽  
2010 ◽  
Vol 210 (2) ◽  
pp. 707-712 ◽  
Author(s):  
M.J. Burchell ◽  
J. Leliwa-Kopystynski
Keyword(s):  
1998 ◽  
Author(s):  
Jun'ichiro Kawaguchi ◽  
Shoji Yoshikawa
Keyword(s):  

2017 ◽  
Vol 105 ◽  
pp. 81-90 ◽  
Author(s):  
Jason Laura ◽  
James A. Skinner ◽  
Marc A. Hunter
Keyword(s):  

Science ◽  
1987 ◽  
Vol 237 (4816) ◽  
pp. 738-743 ◽  
Author(s):  
A. M. VICKERY ◽  
H. J. MELOSH
Keyword(s):  

Science ◽  
2020 ◽  
Vol 368 (6486) ◽  
pp. 67-71 ◽  
Author(s):  
M. Arakawa ◽  
T. Saiki ◽  
K. Wada ◽  
K. Ogawa ◽  
T. Kadono ◽  
...  

The Hayabusa2 spacecraft investigated the small asteroid Ryugu, which has a rubble-pile structure. We describe an impact experiment on Ryugu using Hayabusa2’s Small Carry-on Impactor. The impact produced an artificial crater with a diameter >10 meters, which has a semicircular shape, an elevated rim, and a central pit. Images of the impact and resulting ejecta were recorded by the Deployable CAMera 3 for >8 minutes, showing the growth of an ejecta curtain (the outer edge of the ejecta) and deposition of ejecta onto the surface. The ejecta curtain was asymmetric and heterogeneous and it never fully detached from the surface. The crater formed in the gravity-dominated regime; in other words, crater growth was limited by gravity not surface strength. We discuss implications for Ryugu’s surface age.


2005 ◽  
Vol 13 ◽  
pp. 738-742 ◽  
Author(s):  
M. Antonietta Barucci ◽  
Paolo D’Arrigo ◽  
P. Ball ◽  
Alain Doressoundiram ◽  
Elisabetta Dotto ◽  
...  

AbstractISHTAR (Internal Structure High-resolution Tomography by Asteroid Rendezvous) is a mission developed through ESA General Studies programme. The study, led by Astrium in cooperation with several scientific institutes throughout Europe, has produced a spacecraft design capable of performing multiple asteroid rendezvous and to characterize them with a focussed set of instruments. The ISHTAR concept is centred around a Radar Tomography paylod able to probe the internal structure of a small asteroid to depths of few hundred meters, combined with a small camera for investigation of the surface properties and a radio science experiment for gravity field measurement. This combination will allow the first detailed characterization of a NEO and will give valuable insights into the origin and evolution processes that govern the NEO population. In particular, ISHTAR will be able to visit at least 2 NEOs belonging to two different spectral classes, thereby allowing us to probe the diversity of the NEO population.


1928 ◽  
Vol 48 (1) ◽  
pp. 7-8
Author(s):  
W. R. Lethaby

In the Third Graeco-Roman Room is a long relief, numbered 2154 and entitled a Votive Relief. It is described in the catalogue (1904) as ‘Relief, perhaps votive, with Dionysos receiving a libation. The central group consists of Dionysos and a Maenad…. Behind the Maenad a large crater stands on the ground…. A moulding appears to have been tooled away above…. May be as early as the end of the fourth century. Athens: Elgin Collection. Height 2 feet 7 inches; length 5 feet 8 inches. Found among the ruins of the theatre of Herodes Atticus. Formerly in the possession of N. Logotheti. Stuart, ii, pp. 23, 45.…’Close to the ‘crater’ a hole about an inch in diameter has been carefully bored through the marble—so carefully that the presumption is that it is part of the original work, although it is suppressed in the old illustrations and is not mentioned in the descriptions. On looking behind the relief it at once appears that material at the two ends and the bottom has been cut away. The remnants of the parts which have been cut off suggest the two ends and bottom of a water trough or cistern. The hole mentioned above is situated an inch or so above what remains of the bottom, and thus conforms to the general tradition of stone water troughs such as several of granite which I have recently seen in Dartmoor farm-yards. From these evidences and the appropriate size it may not be doubted that the relief is the front of a water cistern.


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