(10509) Heinrichkayser Main-belt Asteroid
Discovered on 3 April 1989 by E. W. Elst at La Silla.
Heinrich Gustav Johannes Kayser (1853-1940) was a German physicist who demonstrated the presence of helium in the earth's atmosphere. Using the spectra of a large number of elements, he discovered closely grouped spectral lines, the spacing and intensity of which vary in a regular manner.Naming citation (20000320/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Heinrichkayser is today
Seen from above the solar system on 2026-10-14: Heinrichkayser is 3.22 au from the Sun and 4.21 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10509 |
| Provisional designation | 1989 GD4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.4 km (#3,292 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0450 |
| Rotation period | 6.56 hours |
| Absolute magnitude (H) | 12.93 |
| Orbital period | 5.34 years |
| Semi-major axis | 3.05 au |
| Perihelion – aphelion | 2.46 – 3.65 au |
| Eccentricity | 0.195 |
| Inclination | 4.91° |
| Closest distance between its orbit and Earth's (MOID) | 1.48 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Heinrich
- (3635) Kreutz
- (4297) Eichhorn
- (5762) Wanke
- (7873) Boll
- (8053) Kleist
- (8811) Waltherschmadel
- (9133) d'Arrest
- (15273) Ruhmkorff
- (15724) Zille
- (16761) Hertz
- (31032) Scheidemann
- (215868) Rohrer
All asteroids named after someone called Heinrich
Also discovered on 3 April 1989
- (5350) Epetersen
- (6006) Anaximandros
- (6152) Empedocles
- (6710) Apostel
- (7014) Nietzsche
- (7933) Magritte
- (8010) Bohnhardt
- (8353) Megryan
- (9325) Stonehenge
- (9578) Klyazma
- (9579) Passchendaele
- (9749) Van den Eijnde