(172191) Ralphmcnutt Main-belt Asteroid
Discovered on 10 August 2002 by M. W. Buie at Cerro Tololo.
Ralph McNutt (b. 1953) is a senior scientist at the Johns Hopkins University Applied Physics Laboratory. He served as a science team co-investigator and as the Principal Investigator of the PEPSSI instrument aboard the New Horizons Mission to Pluto.Naming citation (MPC batch dated 2018-05-29), IAU / Minor Planet Center, via NASA/JPL
Where Ralphmcnutt is today
Seen from above the solar system on 2026-10-14: Ralphmcnutt is 2.79 au from the Sun and 3.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 172191 |
| Provisional designation | 2002 PH152 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.03 |
| Orbital period | 4.28 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.48 – 2.79 au |
| Eccentricity | 0.0581 |
| Inclination | 11.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.51 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Ralph
- (9003) Ralphmilliken
- (9850) Ralphcopeland
- (9881) Sampson
- (9902) Kirkpatrick
- (10491) Chou
- (11377) Nye
- (12956) Ralphwijers
- (13852) Ford
- (33594) Ralphlawton
- (50427) Ralphmerrifield
All asteroids named after someone called Ralph
Also discovered on 10 August 2002
- (132792) Scottsmith
- (179647) Stuartrobbins
- (186411) Margaretsimon
- (201204) Stevewilliams
- (230434) Johnhanley
- (232259) Georgelawrence