Fai Login o Registrati per scaricare i media e creare liste
Suggerisci modifica o segnala un errore

Largest Asteroid May Be 'mini Planet' With Water Ice



*Description*: NASA's Hubble Space Telescope took these images of Ceres during its 9-hour rotation. The colors represent the differences between relatively red and blue regions. These differences may simply be due to variation on the surface among different types of material. Astronomers enhanced the sharpness in these images to bring out features on Ceres' surface, including brighter and darker regions that could be asteroid impact features. The observations were made in visible and ultraviolet light between December 2003 and January 2004. Technical facts about this news release: About the Object Object Name: Ceres, 1 Ceres Object Description: Minor Body in the Main Asteroid Belt Distance: The semi-major axis of Ceres' orbit about the Sun is 2.77 Astronomical Units (A.U.) or roughly 257 million miles (414 million kilometers). At the time of the Hubble observations, Ceres was roughly 1.63 A.U. from Earth. Dimensions: Ceres is has a mean diameter of approximately 590 miles (950 kilometers). The object has a 974.6 km diameter at the equator and a slightly smaller diameter (909.4 km) pole-to-pole. About the Data Data Description: This image was created from data from the HST proposal 9748: J. Parker (Southwest Research Institute), L. McFadden (University of Maryland), C. Russell (University of California, Los Angeles), A. Stern (Southwest Research Institute), M. Sykes (University of Arizona), P. Thomas (Cornell University) and E. Young (Southwest Research Institute). Instrument: ACS/HRC Exposure Date(s): December 2003 - January 2004 Filters: F330W ("U") and F555W ("V") About the Image Image Credit: NASA, ESA, J. Parker (Southwest Research Institute), P. Thomas (Cornell University), L. McFadden (University of Maryland, College Park), and M. Mutchler and Z. Levay (STScI) Release Date: September 7, 2005 Color: This image is a composite of many separate exposures made by the ACS HRC instrument on the Hubble Space Telescope using several different filters. Two filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are: F330W ("U") blue F555W ("V") red/orange Orientation/Scale: Color View of Ceres [ http://imgsrc.hubblesite.org/hu/db/2005/27/images/d/formats/compass_large_web.jpg ] *News Release Number:*: STScI-2005-27e


LICENZA : Pubblico dominio
ARGOMENTI : # in Matematica e scienze / Astronomia
TAG : tag: Ceres , 1 Ceres , Hubble Space Telescope (HST) , Sun , Earth , Maryland , California , Los Angeles , Arizona
FONTE : Hubble Space Telescope Collection