Asteroid 2018 RJ3 flew past Earth at 0.44 LD, 6th in 7 days
A newly discovered asteroid designated 2018 RJ3 flew past Earth at a distance of 0.44 LD / 0.00112 AU (167 549 km / 104 110 miles) on September 7, 2018. This is the 6th known asteroid to flyby Earth within 1 lunar distance since September 3, including 2018 RW on September 8 and 2018 RC on September 9.
2018 RJ3 was first observed at ATLAS-HKO, Haleakala on September 9, 2018, 2 days after it made the closest approach to our planet. It belongs to the Apollo group of asteroids and it flew past us at a speed (relative to the Earth) of 8.39 km/s at 21:42 UTC.
This object has an estimated diameter between 7.2 and 16 m (23.6 – 52.5 feet).
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
A total of 46 known asteroids flew past us within 1 lunar distance since the start of the year.
We had only two such flybys in August, two in July, two in June (+ one impact) and three in May.
Asteroid 2018 RJ3 at Minor Planet Center; at CNEOS
Featured image credit: CNEOS
If you value what we do here, create your ad-free account and support our journalism.
Your support makes a difference
Dear valued reader,
We hope that our website has been a valuable resource for you.
The reality is that it takes a lot of time, effort, and resources to maintain and grow this website. We rely on the support of readers like you to keep providing high-quality content.
If you have found our website to be helpful, please consider making a contribution to help us continue to bring you the information you need. Your support means the world to us and helps us to keep doing what we love.
Support us by choosing your support level – Silver, Gold or Platinum. Other support options include Patreon pledges and sending us a one-off payment using PayPal.
Thank you for your consideration. Your support is greatly appreciated.
Commenting rules and guidelines
We value the thoughts and opinions of our readers and welcome healthy discussions on our website. In order to maintain a respectful and positive community, we ask that all commenters follow these rules:
We reserve the right to remove any comments that violate these rules. By commenting on our website, you agree to abide by these guidelines. Thank you for helping to create a positive and welcoming environment for all.