(9954) Brachiosaurus Main-belt Asteroid
Discovered on 8 April 1991 by E. W. Elst at La Silla.
Brachiosaurus, the heaviest of all dinosaurs (about 70 tons) had a very long neck with a small head. Preferring swampy areas, where the water would have supported its weight, it lived during in Jurassic–Lower Cretaceous times.Naming citation (WGSBN Bull. 3, #15, 6), IAU / Minor Planet Center, via NASA/JPL
Where Brachiosaurus is today
Seen from above the solar system on 2026-10-14: Brachiosaurus is 2.59 au from the Sun and 2.95 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9954 |
| Provisional designation | 1991 GX7 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 8.79 hours |
| Absolute magnitude (H) | 13.6 |
| Orbital period | 4.58 years |
| Semi-major axis | 2.76 au |
| Perihelion – aphelion | 2.40 – 3.12 au |
| Eccentricity | 0.130 |
| Inclination | 9.08° |
| Closest distance between its orbit and Earth's (MOID) | 1.42 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 8 April 1991
- (6487) Tonyspear
- (6647) Josse
- (6912) Grimm
- (7126) Cureau
- (7179) Gassendi
- (8277) Machu-Picchu
- (8369) Miyata
- (8665) Daun-Eifel
- (8852) Buxus
- (9180) Samsagan
- (9339) Kimnovak
- (9592) Clairaut