Key Facts


85770 (1998 UP1) is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 1998 UP1 as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.

1998 UP1 orbits the sun every 364 days (1.00 years), coming as close as 0.65 AU and reaching as far as 1.34 AU from the sun. Based on its brightness and the way it reflects light, 1998 UP1 is probably between 0.192 to 0.429 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

No Close Approaches

1998 UP1's orbit is 0.08 AU from Earth's orbit at its closest point. This means that there is a 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

1998 UP1's orbit is determined by observations dating back to Oct. 12, 1990. It was last officially observed on Nov. 26, 2021. The IAU Minor Planet Center records 460 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 1998 UP1:



   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 0.9978 AU
  • Eccentricity: 0.3451
  • Inclination: 33.18°
  • Longitude of Ascending Node: 18.33°
  • Argument of Periapsis: 234.24°
  • Mean Anomaly: 81.47°

Physical Characteristics

  • Diameter: ~0.247 km
  • Magnitude: 20.71

Derived Characteristics

  • Orbit Period: 364 days (1.00 years)
  • Avg. Orbit Speed: 29.82 km/s
  • Aphelion Distance: 1.34 AU
  • Perihelion Distance: 0.65 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 85770 (1998 UP1) 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.

Size Rendering

The below comparison is an artistic rendering that uses available data on the diameter of 1998 UP1 to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.