(11503) Isobeken Main-belt Asteroid
Discovered on 21 January 1990 by Mizuno, Y., Furuta, T. at Kani.
Ken Isobe (b. 1955) is a Japanese amateur astronomer living in Shijonawate City, Osaka Prefecture. He is a developer of remote observatories and also a member of the Hoshinohiroba astronomy club.Naming citation (WGSBN Bull. 6, #15, 6), IAU / Minor Planet Center, via NASA/JPL
Where Isobeken is today
Seen from above the solar system on 2026-10-14: Isobeken is 2.39 au from the Sun and 3.30 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11503 |
| Provisional designation | 1990 BF |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.10 km (#10,426 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.247 |
| Rotation period | 5.19 hours |
| Absolute magnitude (H) | 13.81 |
| Orbital period | 3.57 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 2.10 – 2.58 au |
| Eccentricity | 0.103 |
| Inclination | 4.46° |
| Closest distance between its orbit and Earth's (MOID) | 1.11 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Ken
- (5348) Kennoguchi
- (8258) McCracken
- (9175) Graun
- (13991) Kenphillips
- (15364) Kenglover
- (21149) Kenmitchell
- (27749) Tsukadaken
- (31469) Aizawa
- (47627) Kendomanik
- (55276) Kenlarner
- (99862) Kenlevin
- (121133) Kenflurchick
All asteroids named after someone called Ken
Also discovered on 21 January 1990
- (4458) Oizumi
- (4951) Iwamoto
- (5330) Senrikyu
- (5435) Kameoka
- (5825) Rakuyou
- (6389) Ogawa
- (6391) Africano
- (6517) Buzzi
- (8492) Kikuoka
- (11284) Belenus
- (11504) Kazo
- (35076) Yataro
More named asteroids discovered by Mizuno, Y., Furuta, T.
- (4265) Kani
- (4351) Nobuhisa
- (4353) Onizaki
- (4614) Masamura
- (4717) Kaneko
- (4799) Hirasawa
- (4903) Ichikawa
- (4904) Makio
- (4951) Iwamoto
- (5236) Yoko
- (5287) Heishu
- (5288) Nankichi
← (11501) Ushimaru · (11504) Kazo →