This Year's Largest And Fastest Asteroid Is About To Zoom Past Earth


Word Count

394 words

Reading Level

Listen to Article

An artist's illustration of an asteroid flyby (Credit: NASA)

On March 21, 2021, Earth will have its closest encounter with 2001 FO32 — the largest and fastest-known asteroid scheduled to fly past our planet this year. The space rock, estimated to be between 2,526 feet ( 0.47 miles) and 5,577 feet (1.05 miles) in diameter, will zip past Earth at a staggering speed of 76,980 miles per hour (123,887 km/h). To put it in perspective, that is about 100 times faster than the speed of sound!

FO32 is among the thousands of "near-Earth objects," or NEOs, that orbit the sun in our cosmic neighborhood. It was first spotted by the Lincoln Near-Earth Asteroid Research (LINEAR) program telescopes in New Mexico on March 23, 2001. The space rock's highly elliptical orbit around the Sun — which takes 810 days, or just over two years — brings it close to Earth every thirty to fifty years. While FO32 will revisit our planet on March 22, 2052, the 2021 flyby will be its closest one in the next 200 years!

The asteroid and Earth are seen on the left of this orbital map on the 'blue' Earth orbit line - the orbit of the asteroid is visible through the tall white lines (Credit: NASA)

NASA researchers have tagged the asteroid as a "potentially hazardous object." The classification refers to all space rocks that can make close approaches to Earth and are large enough — over 450 feet (140 meters) in diameter — to cause significant damage in the event of impact. Fortunately, FO32, which will be 1.3 million miles away — or about five times the distance between the Earth and the Moon — at its closest approach at 11:03 a.m. EST (1603 GMT) on March 21, 2021, poses no such risk during this, or any future, encounters.

Stargazers hoping to catch a glimpse of flyby asteroids usually have to wait patiently for at least 5 to 10 minutes until their backyard telescopes can detect the space rocks which appear like slow-moving “stars.” However, since FO32 is moving at such rapid speeds, observers with an 8 inch or larger telescope will be able to watch the space rock soar by in real-time during its closest approach. While FO32 will be visible worldwide, due to its position in the southern sky, the best views will be reserved for Southern Hemisphere residents. Also, since the asteroid's closest approach will occur during daylight hours in the US, residents hoping to catch a glimpse will have to seek out space rock a little earlier, at about at 4:45 a.m. EST when the skies are still dark,



Get the Workbook for this article!

Workbook contains: Article, Reading Comprehension, Critical Thinking Questions, Vocabulary in Context (+ answers), Multiple Choice Quiz (+ answers), Parts of Speech Quiz (+ answers), Vocabulary Game (+ answers)
Cite Article
Learn Keywords in this Article
  • hxney_secret
    hxney_secret10 months
    I have heard of this and seen a video but, I really never wanted to learn about it! Now that I know about it, I think it's cool :O
    • dreamgirl22
      dreamgirl2211 months
      Did any won see it go by us😃
      • adroit_avimimus
        Oh I remember this! I watched it fly over on a live video!
        • therobo
          theroboover 1 year
          if it crashed earth would go boom boom.
          • ocean_25
            ocean_25over 1 year
            ya that is crazy
            • wertqaz
              wertqazalmost 2 years
              the speed of sound is not as fast as the speed of light but 100 TIMES FASTER and its not big but if it did crash into the earth going that fast thats dangerous luckly it didn't crash
              • optimus_fan
                optimus_fanalmost 2 years
                Good it didn't land ON earth or else: ☄️+🌎=💥
              • nightwaves
                nightwavesalmost 2 years
                Also, didn't some teenagers spot a huge astroid or whatever that they reported. And then the officals said it would crash into earth in like 5 billion years?
                • nightwaves
                  nightwavesalmost 2 years
                  100times faster than sound. You will deffinetly be very lucky to see it.
                  • nasapadowire
                    nasapadowirealmost 2 years
                    Your luck if you got to see it this time