by APOD Robot » Sun May 28, 2023 4:07 am
Ida and Dactyl: Asteroid and Moon
Explanation: This asteroid has a moon. The
robot spacecraft Galileo on route to
Jupiter in 1993 encountered and photographed two
asteroids during its long interplanetary voyage. The second minor planet it photographed,
243 Ida, was
unexpectedly discovered to have a moon. The tiny moon,
Dactyl, is only about 1.6 kilometers across and seen as a small dot on the right of the sharpened
featured image. In contrast, the
potato-shaped Ida is much larger, measuring about 60 kilometers long and 25 km wide.
Dactyl is the first moon of an asteroid ever discovered -- now many asteroids are
known to have moons. The names Ida and Dactyl are from
Greek mythology.
[url=https://apod.nasa.gov/apod/ap230528.html] [img]https://apod.nasa.gov/apod/calendar/S_230528.jpg[/img] [size=150]Ida and Dactyl: Asteroid and Moon[/size][/url]
[b] Explanation: [/b] [url=https://photojournal.jpl.nasa.gov/catalog/PIA00333]This asteroid[/url] has a moon. The [url=https://solarsystem.nasa.gov/missions/galileo/overview/#otp_quick_facts]robot spacecraft Galileo[/url] on route to [url=https://solarsystem.nasa.gov/planets/jupiter/in-depth/]Jupiter[/url] in 1993 encountered and photographed two [url=https://solarsystem.nasa.gov/asteroids-comets-and-meteors/overview/]asteroids[/url] during its long interplanetary voyage. The second minor planet it photographed, [url=https://solarsystem.nasa.gov/asteroids-comets-and-meteors/asteroids/243-ida/in-depth/]243 Ida[/url], was [url=https://i.imgflip.com/eyvnj.jpg]unexpectedly[/url] discovered to have a moon. The tiny moon, [url=https://en.wikipedia.org/wiki/Dactyl_(moon)]Dactyl[/url], is only about 1.6 kilometers across and seen as a small dot on the right of the sharpened [url=https://photojournal.jpl.nasa.gov/catalog/PIA00069]featured image[/url]. In contrast, the [url=https://apod.nasa.gov/apod/ap200401.html]potato-shaped[/url] Ida is much larger, measuring about 60 kilometers long and 25 km wide. [url=https://en.wikipedia.org/wiki/Dactyl_(moon)]Dactyl[/url] is the first moon of an asteroid ever discovered -- now many asteroids are [url=https://apod.nasa.gov/apod/ap220927.html]known to have moons[/url]. The names Ida and Dactyl are from [url=https://en.wikipedia.org/wiki/Greek_mythology]Greek mythology[/url].
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