In the process of our planned survey of the sky of Sept 10, 2010, we discovered a bright (brighter than mag. 18) and moderately fast-moving (1.9″/min.), unidentified object. Its speed was nearly three times greater than the average speed of the asteroids in the group, but the NEO rating was small – a mere 21. At my request, observations of this object were carried out by Timur Kryachko at the Astrotel-Caucasus Observatory. The object’s rating didn’t increase, but the object was clearly unusual. Followup observations were made two days later – Sept 12. The rating increased by one…Calculating preliminary orbital elements with the help of the program FindOrb, I made the decision to personally write to the dirrector of the Minor Planet Center, Timothy Spahr. Having sent him all the measurements of the object in question, I received a reply.?

GO ahead and send your other night(s) for this object
as soon as you can.  I suspect it is a new NEO.


After this letter, the object was placed on the confirmation page of Near-Earth and generally unusual new Solar System objects. After that, supplementary observations of the object iJQJ230 were obtained at the Tzec Maun and RAS Observatories (Moorook, Australia).
After several hour the long awaited circular came out. iJQJ230 turned out to be an near-Earth asteroid of the Amor family. It was assigned the designation 2010 RN80. The asteroid will pass at its minimum distance from the Earth, 0.112 a.u., on Oct. 18, 2010 at 10:11 U.T. Its diameter is estimated at 360 meters.

Orbit Viewer

The object is fairly large, and in the first half of October it will reach mag. 17.7. It will be visible in moderate-sized telescopes until the beginning of 2011. Thus, in the course of observations over many months, it will be possible to acquire a sufficiently precise orbit to try to find 2010 RN10 in the archives.
With regard to measurements, the object has a rather large eccentricity – 0.52 which is rather rare for an object with similar orbital elements. Below you can see the distribution of known objects.

The first discovery of a near-earth asteroid was a the result of a long journey and a huge amount of work at our remote observatory. I hope that future interesting discoveries don’t require such a long wait.
Numerous congratulations have come to us from our friends in various parts of the world…

Timothy Spahr, USA:

Congratulations to you and your team!  This
is a fine discovery.  Good work looking
where you did, and paying attention, and getting
follow-up.  Keep up the excellent work!


Sergio Foglia, Italy:

Hi Leonid

congratulations for your discovery



Paulo Holvorcem, Brazil:

Hey Leonid,

Congratulations on the bright NEO, 2010 RN80!
Just saw the MPEC.


Tomas Vorobjov, Netherlands


congratulations Leonid!


And here are some of them. An excellent stimulus to continue our work!

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