NEO Earth Close Approaches Asteroid Nasa Warning

asteroid nasa warning asteroid nasa warning 2020 nasa asteroid warning 2019 nasa asteroid warning 2023 nasa asteroid warning 2029

cozy

April 12, 2020

0

asteroid nasa warning, asteroid nasa warning 2020, nasa asteroid warning 2019, nasa asteroid warning 2023, nasa asteroid warning 2029

The subsequent table shows close approaches to the Earth by near-Earth objects (NEOs) limited while selected in the “Table Settings” below. Data are not available prior to 1900 A.D nor after 2200 A.D. Data are more distant limited to encounters with .

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

Use the "Print" catch above to print data contained in this table. Use the "CSV" or "Excel" buttons to download the data for utilize in your spreadsheet program. Allow a few seconds for downloads of large datasets.

Machine-readable data are available. See the for details.

Object

Object primary designation

Close-Approach (CA) Date

Date and time (TDB) of closest Earth approach. "Nominal Date" is given to appropriate precision. The 3-sigma unpredictability in the time is given in the +/- column in 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 the majority likely (Nominal) close-approach space (Earth center to NEO center), in LD (Lunar Distance) and .

CA Distance Minimum (LD | au)

The smallest possible close-approach space (Earth center to NEO center), in LD (Lunar Distance) and . The smallest possible space 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 total magnitude (in general, smaller H implies larger asteroid diameter). Undefined for comets.

Estimated Diameter

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

au

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

LD

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