9400 (1994 TW1)

Key Facts

• Categorized as a Amor-class Asteroid
• Comparable in size to the island of Manhattan (3.70 km diameter)
• Classified as a Near Earth Asteroid (NEA)
• Not a Potentially Hazardous Object
• See orbit simulation

Overview

9400 (1994 TW1) is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 1994 TW1 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.

1994 TW1 orbits the sun every 1,520 days (4.16 years), coming as close as 1.08 AU and reaching as far as 4.09 AU from the sun. 1994 TW1 is about 3.7 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the island of Manhattan.

The rotation of 1994 TW1 has been observed. It completes a rotation on its axis every 97.10 hours.

1994 TW1's spectral type None (Tholen) / Sr (SMASSII) indicates that it is likely to contain and .

No Close Approaches

1994 TW1's orbit is 0.28 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

1994 TW1's orbit is determined by observations dating back to March 18, 1991. It was last officially observed on June 12, 2020. The IAU Minor Planet Center records 1,868 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 1994 TW1:

• 14 Irene (A851 KA)
• 32 Pomona (A854 UA)
• 56 Melete (A857 RB)

References

• JPL Small Body Database
• Mission Design
• Sky Finder Chart

Orbit Simulation

Sky Map

The position of 9400 (1994 TW1) 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 above comparison is an artistic rendering that uses available data on the diameter of 1994 TW1 to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.