(5622) Percyjulian Main-belt Asteroid
Discovered on 14 October 1990 by E. F. Helin at Palomar.
Percy Lavon Julian (1899–1975) was an African American chemist. His groundbreaking work into synthesizing medical drugs from plants paved the way for medications that hundreds of millions of people use today. In his lifetime he received over one hundred medical patents.Naming citation (WGSBN Bull. 5, #7, 4), IAU / Minor Planet Center, via NASA/JPL
Where Percyjulian is today
Seen from above the solar system on 2026-10-14: Percyjulian is 2.82 au from the Sun and 3.72 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5622 |
| Provisional designation | 1990 TL4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.67 km (#5,298 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.328 |
| Rotation period | 3.68 hours |
| Spectral type | Sq |
| Absolute magnitude (H) | 12.31 |
| Orbital period | 4.69 years |
| Semi-major axis | 2.80 au |
| Perihelion – aphelion | 2.32 – 3.28 au |
| Eccentricity | 0.173 |
| Inclination | 8.11° |
| Closest distance between its orbit and Earth's (MOID) | 1.32 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 14 October 1990
- (5647) Sarojininaidu
- (6447) Terrycole
- (6718) Beiglbock
- (7701) Zrzavy
- (7820) Ianlyon
- (8019) Karachkina
- (8020) Erzgebirge
- (8502) Bauhaus
- (8661) Ratzinger
- (10320) Reiland
- (11887) Echemmon
- (13055) Kreppein
More named asteroids discovered by E. F. Helin
- (1982) Cline
- (2048) Dwornik
- (2050) Francis
- (2062) Aten
- (2074) Shoemaker
- (2083) Smither
- (2099) Opik
- (2100) Ra-Shalom
- (2128) Wetherill
- (2143) Jimarnold
- (2220) Hicks
- (2335) James
← (5621) Erb · (5623) Iwamori →