(7131) Longtom Main-belt Asteroid
Discovered on 23 December 1992 by Natori, A., Urata, T. at Yakiimo.
Longtom, the nine-pound cannon in Treasure Island, is the nickname of the Nikon 10-cm refractor used regularly by Hoei Nojiri (1885-1977), who ordered the telescope and translated Stevenson's novel into Japanese in 1928. The telescope was at one time also used by Tokyo astronomer Koichiro Tomita.Naming citation (19991123/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Longtom is today
Seen from above the solar system on 2026-10-14: Longtom is 2.97 au from the Sun and 2.69 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7131 |
| Provisional designation | 1992 YL |
| Orbit class | Main-belt Asteroid |
| Diameter | 29.9 km (#1,365 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0510 |
| Absolute magnitude (H) | 11.9 |
| Orbital period | 5.66 years |
| Semi-major axis | 3.18 au |
| Perihelion – aphelion | 2.64 – 3.71 au |
| Eccentricity | 0.168 |
| Inclination | 16.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.70 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 23 December 1992
More named asteroids discovered by Natori, A., Urata, T.
- (4806) Miho
- (4959) Niinoama
- (5565) Ukyounodaibu
- (5650) Mochihito-o
- (5744) Yorimasa
- (5784) Yoron
- (5855) Yukitsuna
- (6042) Cheshirecat
- (6136) Gryphon
- (6137) Johnfletcher
- (6527) Takashiito
- (6610) Burwitz
← (7130) Klepper · (7132) Casulli →