(7611) Hashitatsu Main-belt Asteroid
Discovered on 23 January 1996 by T. Kobayashi at Oizumi.
Tatsuo Hashimoto (b. 1912) has been a member of the Oriental Astronomical Association since the 1930s and an advisor to the Oita Astronomical Society since its founding in 1979. In 1944 he won a patent for his invention of a new type of protractor in which a right angle has 60 degrees.Naming citation (20050125/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hashitatsu is today
Seen from above the solar system on 2026-10-14: Hashitatsu is 3.37 au from the Sun and 3.79 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7611 |
| Provisional designation | 1996 BW1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 23.7 km (#1,798 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0480 |
| Rotation period | 9.81 hours |
| Absolute magnitude (H) | 12.29 |
| Orbital period | 5.17 years |
| Semi-major axis | 2.99 au |
| Perihelion – aphelion | 2.54 – 3.44 au |
| Eccentricity | 0.150 |
| Inclination | 8.49° |
| Closest distance between its orbit and Earth's (MOID) | 1.53 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Tatsuo
All asteroids named after someone called Tatsuo