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9984 Gregbryant

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Also known as Gregbryant

asteroid

Picture of the Day · NASA

Pathfinder on Mars

Pathfinder on Mars

2026-07-04

On July 4th, 1997, using its own array of fireworks, a parachute, and a cocoon of airbags, the Mars Pathfinder spacecraft bounced like a giant beach ball at least 15 times before it came to rest on the surface of Mars at 10:07 AM Pacific Daylight Time. After its then novel airbag-assisted landing sequence was completed, Pathfinder transmitted this color mosaic to mission operators on Earth. In the scene from another world, the Mars Sojourner robot rover is visible in the foreground, crouched on top of the unfolded Pathfinder. About the size of a large house cat, the six-wheeled, solar-powered Sojourner became the first successful Martian rover. Surrounding Pathfinder are deflated airbags and the rock-strewn terrain of the Ares Vallis floodplain. In the distance Martian hills appear against a dusty brownish sky. The Pathfinder lander was subsequently renamed the Carl Sagan Memorial Station.

via NASA APOD

Wikidata facts

Instance of
asteroid
Followed by
9985 Akiko
Parent body
Sun
Minor-planet group
asteroid belt
Diameter
10.742
Orbital period
1434.38031400614
Image
AnimatedOrbitOf9984GregBryant.gif
Show 16 more facts
discoverer or inventor
Robert H. McNaught
provisional designation
1996 HT
time of discovery or invention
1996-04-18
orbital inclination
3.814854042492002
orbital eccentricity
0.04493359831648223
absolute magnitude
13.54
mean anomaly
193.0367576896405
longitude of ascending node
287.969466800037
argument of periapsis
290.1920211837291
periapsis
2.377264436697519
apoapsis
2.600953690350108
semi-major axis of an orbit
2.489109063523813
site of astronomical discovery
Macquarie
albedo
0.08
time of periapsis
2461665.746633146
Sources (2)

via Wikidata · CC0