Image: 1999 KW4 animated

Description: Movie of a near-Earth binary asteroid built from the estimations from radar observations. This movie has been cropped and gif-ed from the QuickTime file released on the source page. The GIF animation cycles for one orbit, since revolutions and librations of the bodies have different periods, a jerk appears at each cycle. For a better rendering, or for other views, follow the link to the source.
Title: 1999 KW4 animated
Credit: https://web.archive.org/web/20030219082308/https://echo.jpl.nasa.gov/~ostro/kw4/ Archived from original
Author: Dr. Steven Ostro et al.
Permission: Public domainPublic domainfalsefalse This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also and Template:Cc-Hubble. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
Usage Terms: Public domain
License: Public domain
Attribution Required?: No