Picture of the Day · NASA

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
Small body data
24604 Vasilermakov (1973 SP4)
- Orbit class
- Main-belt Asteroid
- Diameter
- 4.607 km
- Albedo
- 0.276
- Rotation period
- 13.246 h
- Absolute magnitude
- 13.710 H
- Earth MOID
- 1.030 AU
via NASA/JPL Small-Body Database
Wikidata facts
- Instance of
- asteroid
- Followed by
- 24605 Tsykalyuk
- Follows
- 24603 Mekistheus
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- 4.607
- Orbital period
- 1435.25148503747
Show 18 more facts
- time of discovery or invention
- 1973-09-27
- discoverer or inventor
- Lyudmila Chernykh
- site of astronomical discovery
- Crimean Astrophysical Observatory
- provisional designation
- 1999 DM4
- orbital eccentricity
- 0.1818581453262035
- orbital inclination
- 8.819950653539625
- periapsis
- 2.037268778712617
- apoapsis
- 2.942964825213933
- semi-major axis of an orbit
- 2.490116801963275
- mean anomaly
- 127.1375791503428
- longitude of ascending node
- 353.460947342721
- argument of periapsis
- 348.0396882978996
- absolute magnitude
- 13.7
- albedo
- 0.276
- rotation period
- 13.2463
- Commons category
- 24604 Vasilermakov
- time of periapsis
- 2460493.626668668
- epoch
- November 21, 2025
Sources (2)
via Wikidata · CC0