(26998) Iriso Outer Main-belt Asteroid
Discovered on 25 December 1997 by N. Sato at Chichibu.
Iriso is the name of an area in Sayama-city, Saitama, Japan. Nanamagari no I, a well in Iriso, was designated as a cultural asset in 1949.Naming citation (MPC batch dated 2013-04-25), IAU / Minor Planet Center, via NASA/JPL
Where Iriso is today
Seen from above the solar system on 2026-10-14: Iriso is 2.92 au from the Sun and 3.15 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 26998 |
| Provisional designation | 1997 YX6 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 8.99 km (#5,771 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.219 |
| Rotation period | 3.33 hours |
| Absolute magnitude (H) | 12.95 |
| Orbital period | 5.74 years |
| Semi-major axis | 3.21 au |
| Perihelion – aphelion | 2.60 – 3.81 au |
| Eccentricity | 0.189 |
| Inclination | 14.6° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 25 December 1997
- (8430) Florey
- (11152) Oomine
- (16857) Goodall
- (19370) Yukyung
- (29514) Karatsu
- (58671) Diplodocus
- (100691) Hasetoshitsuka