NEO Earth Close Approaches Asteroids Coming Near Earth

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April 12, 2020

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The next table shows close approaches to the Earth by near-Earth objects (NEOs) limited as selected within the “Table Settings” below. Data are not available earlier to 1900 A.D nor after 2200 A.D. Data are further limited to encounters in the company of .

Object	Close-Approach (CA) Date	CA Distance Nominal (LD | au)	CA Distance Minimum (LD | au)	V relative (km/s)	V infinity (km/s)	H (mag)	Estimated Diameter

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Object

Object primary designation

Close-Approach (CA) Date

Date and time (TDB) on closest Earth approach. "Nominal Date" is specified to appropriate precision. The 3-sigma uncertainty within the time is specified within the +/- column within days_hours:minutes format (for example, "2_15:23" is 2 days, 15 hours, 23 minutes; "< 00:01" is less than 1 minute).

CA Distance Nominal (LD | au)

The most likely (Nominal) close-approach distance (Earth center to NEO center), within LD (Lunar Distance) and .

CA Distance Minimum (LD | au)

The lowest viable close-approach distance (Earth center to NEO center), within LD (Lunar Distance) and . The lowest viable distance is based on the 3-sigma Earth target-plane error ellipse.

V relation (km/s)

Object pace relation to Earth at close-approach.

V infinity (km/s)

Object pace relation to a massless Earth at close-approach.

H (mag)

Asteroid absolute magnitude (in general, smaller H implies larger asteroid diameter). Undefined intended comets.

Estimated Diameter

Diameter range (min - max) estimated from the asteroid's absolute magnitude (H) and limiting albedos on 0.25 and 0.05.

au

One Astronomical Unit (au) is approximately 150 million kilometers (see intended definition).

LD

One Lunar Distance (LD) is approximately 384,000 kilometers (see intended definition).