Asteroids Near Earth

Asteroid 2017 SA21

2017 SA21 asteroid magnitude is 28.3 H and asteroid diameter is between 6 and 13 meters. Asteroid 2017 SA21 closest near miss earth distance is 441,263 kilometers on 26 September 2017.

Magnitude28.33 H
Diameter min.5.74 meters
Diameter max.12.84 meters
EquinoxJ2000
Orbit Uncertainty7 U
Orbital Period1261.82 days
Min. Orbit Intersection.00269624
Mean Anomaly359.381483
Mean Motion0.285302
Semi-major Axis2.285246 au
Eccentricity0.577674
Is Hazardous?No
Jupiter Tisserand invariant3.356
Inclination4.125092 deg
Ascending Node Longitude185.502571 deg
Perihelion Distance0.96512 au
Perihelion Argument151.650146 deg
Perihelion Time2458002.66794 JED
Aphelion Distance3.605373 au
Orbit Determination Date17 October 2017
Epoch Osculation Date2458000.5

List of Asteroid 2017 SA21 Close Approaches to Earth

List of approaches near Earth of asteroid 2017 SA21 with distance and velocity information.

27 September 2017

Distance570,835 km
Distance (miles)354,701 mi
Lunar Distance1.484346 LD
Astronomical Distance0.003816 AU
Velocity (km per hour)36,227 km/h
Velocity (meters per second)10,063 m/s
Orbiting BodyEarth

26 September 2017

Distance441,263 km
Distance (miles)274,188 mi
Lunar Distance1.147418 LD
Astronomical Distance0.00295 AU
Velocity (km per hour)34,496 km/h
Velocity (meters per second)9,582 m/s
Orbiting BodyMoon

Asteroid 2017 SA21 Velocity Distance Comparison

Asteroid Pass DateVelocityDistance
27 September 201736,227 km/h570,835 km
26 September 201734,496 km/h441,263 km