Key Facts


523618 (2007 RT15) is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2007 RT15 as potentially hazardous because its orbit does not bring it close to Earth.

2007 RT15 orbits the sun every 90,800 days (248.60 years), coming as close as 30.32 AU and reaching as far as 48.74 AU from the sun. Based on its brightness and the way it reflects light, 2007 RT15 is probably between 116.026 to 259.442 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. state of New Jersey.

No Close Approaches

2007 RT15's orbit is 29.30 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

2007 RT15's orbit is determined by observations dating back to Sept. 26, 2000. It was last officially observed on July 31, 2020. The IAU Minor Planet Center records 161 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2007 RT15:



   or view a random object

Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 39.53 AU
  • Eccentricity: 0.2329
  • Inclination: 12.94°
  • Longitude of Ascending Node: 82.2°
  • Argument of Periapsis: 275.51°
  • Mean Anomaly: 35.39°

Physical Characteristics

  • Diameter: ~149.789 km
  • Magnitude: 6.8

Derived Characteristics

  • Orbit Period: 90,800 days (248.60 years)
  • Avg. Orbit Speed: 4.74 km/s
  • Aphelion Distance: 48.74 AU
  • Perihelion Distance: 30.32 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 523618 (2007 RT15) is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.