Castalia is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Castalia as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
Castalia orbits the sun every 400 days (1.10 years), coming as close as 0.55 AU and reaching as far as 1.58 AU from the sun. Castalia is about 1.4 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. Pentagon.
The rotation of Castalia has been observed. It completes a rotation on its axis every 4.10 hours.
Castalia's orbit is 0.02 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.
Castalia has 22 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|Aug. 22, 2023||16,459,931||18.197|
|April 4, 2027||19,272,376||13.757|
|Aug. 26, 2046||3,751,564||14.726|
|April 11, 2050||23,306,025||17.785|
|Aug. 19, 2057||24,670,301||19.837|
|April 1, 2061||21,645,686||12.733|
|Aug. 27, 2080||9,240,245||13.486|
|April 13, 2084||29,552,248||19.532|
|Aug. 23, 2091||13,372,964||17.572|
|April 6, 2095||18,289,884||15.044|
|March 28, 2106||29,713,981||10.551|
|Aug. 30, 2114||26,421,715||10.568|
|Aug. 28, 2125||4,276,717||14.616|
|April 13, 2129||26,292,393||18.645|
|Aug. 24, 2136||13,491,459||17.607|
|April 8, 2140||18,567,555||15.525|
|Aug. 20, 2147||29,770,962||20.846|
|April 2, 2151||23,056,480||12.275|
|Aug. 31, 2170||24,680,730||10.813|
|Aug. 29, 2181||7,904,068||13.788|
|Aug. 26, 2192||7,102,650||16.267|
|April 10, 2196||20,386,888||16.666|
Castalia's orbit is determined by observations dating back to Aug. 1, 1989. It was last officially observed on Aug. 8, 2023. The IAU Minor Planet Center records 415 observations used to determine its orbit.
The position of Castalia 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.
The above comparison is an artistic rendering that uses available data on the diameter of Castalia 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.