
File:000943-asteroid_shape_model_(943)_Begonia.png · Wikimedia Commons · See Wikimedia Commons
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
Key facts
- Discovered by
- K. Reinmuth
- Discovery site
- Heidelberg Obs.
- Discovery date
- 20 October 1920
- Pronunciation
- / b ɪ ˈ ɡ oʊ n i ə /
- Named after
- Begonia , (genus of flowers)
- Alternative designations
- A920 UA · 1944 DM, 1947 RC · 1977 FU, 1920 HX
- Minor planet category
- main-belt · ( outer ) , background
- Observation arc
- 99.21 yr (36,237 d)
- Aphelion
- 3.7814 AU
- Perihelion
- 2.4517 AU
- Semi major axis
- 3.1166 AU
- Orbital period sidereal
- 5.50 yr (2,010 d)
- Mean anomaly
- 310.58 °
- Mean motion
- 0° 10 44.76 / day
- Inclination
- 12.108°
- Longitude of ascending node
- 113.77°
- Argument of perihelion
- 4.1314°
- Mean diameter
- 69.21 ± 3.0 km 69.30 ± 1.23 km 70.572 ± 2.446 km
via Wikipedia infobox
Wikidata facts
- Instance of
- asteroid
- Followed by
- 944 Hidalgo
- Follows
- 942 Romilda
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- 70.572
- Orbital period
- 2006.70055468657
- Image
- 000943-asteroid shape model (943) Begonia.png
Show 19 more facts
- discoverer or inventor
- Karl Wilhelm Reinmuth
- site of astronomical discovery
- Heidelberg-Königstuhl State Observatory
- provisional designation
- A920 UA
- time of discovery or invention
- 1920-10-20
- orbital inclination
- 12.11356673836368
- Commons category
- 943 Begonia
- albedo
- 0.044
- rotation period
- 15.66
- asteroid spectral type
- S-type asteroid
- absolute magnitude
- 9.75
- orbital eccentricity
- 0.2147185183464791
- semi-major axis of an orbit
- 3.113551803199001
- periapsis
- 2.445014573221103
- apoapsis
- 3.782089033176899
- longitude of ascending node
- 113.7505307741341
- argument of periapsis
- 3.918312546540732
- mean anomaly
- 309.2474533885029
- time of periapsis
- 2461283.40323177
- epoch
- November 21, 2025
Sources (2)
via Wikidata · CC0
~5 min read
Encyclopedic overview
943 Begonia /bɪˈɡoʊniə/ is a large, carbonaceous background asteroid, approximately 70 kilometers (43 miles) in diameter, from the outer region of the asteroid belt. It was discovered by German astronomer Karl Reinmuth at the Heidelberg Observatory on 20 October 1920 and given the provisional designations A920 UA and 1920 HX. The dark C-type asteroid (Ch) has a rotation period of 15.7 hours. It was named after the genus of popular houseplants, Begonia.
Orbit and classification
Excerpted from Wikipedia’s “943 Begonia” article, available under the CC BY-SA 4.0 licence.