74503 Madola
| Discovery | |
|---|---|
| Discovered by | Denis Bergeron |
| Discovery site | Val-des-Bois (Quebec) |
| Discovery date | 23 February 1999 |
| Designations | |
| MPC designation | 74503 |
| 1999 DN4 | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 7693 days (21.06 yr) |
| Aphelion | 3.5689053 AU (533.90063 Gm) |
| Perihelion | 2.4583088 AU (367.75776 Gm) |
| 3.0136070 AU (450.82919 Gm) | |
| Eccentricity | 0.1842637 |
| 5.23 yr (1910.9 d) | |
| 50.835764° | |
| 0.18839707°/day | |
| Inclination | 17.178978° |
| 357.00607° | |
| 200.78997° | |
| Earth MOID | 1.46517 AU (219.186 Gm) |
| Jupiter MOID | 1.43584 AU (214.799 Gm) |
| Physical characteristics | |
| 15.3 | |
|
| |
74503 Madola (1999 DN4) is a main-belt asteroid discovered on February 23, 1999, by Denis Bergeron at Val-des-Bois(Quebec).
In mid-2009, it was officially named Madola by the International Astronomical Union, in honor of Christian Marois (b. 1974), René Doyon (b. 1963) and David Lafrenière (b. 1978), who developed instruments and techniques that allowed the first direct photograph of an extrasolar planetary system, consisting of three planets orbiting the star HR 8799 in Pegasus.
Doyon was director of the Mont-Mégantic Observatory in Quebec; Marois and Lafrenière were postdoctoral fellows at the Herzberg Institute of Astrophysics and the University of Toronto.
References
- ↑ "JPL Small-Body Database Browser: 74503 Madola (1999 DN4)". Jet Propulsion Laboratory. Retrieved 25 March 2016.
External links
- http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=madola;orb=0;cov=0;log=0;cad=0
- http://www.astrosurf.com/d_bergeron/astronomie/Bibliotheque/Decouvertes_asteroides/decouvertes_asteroides.htm (in French)
- 74503 Madola at the JPL Small-Body Database
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