(546842) Ruanjiangao Main-belt Asteroid
Discovered on 21 December 2011 by Xu, Z., Gao, X. at Xingming.
Ruan Jiangao (b. 1986) is a Chinese amateur astronomer in Fangchenggang, Guangxi, who has many astronomical discoveries, including novae in M31 and M33, supernovae, asteroids, more than 80 SOHO comets and comet C/2009 G1(STEREO).Naming citation (WGSBN Bull. 1, #1, 32), IAU / Minor Planet Center, via NASA/JPL
Where Ruanjiangao is today
Seen from above the solar system on 2026-10-14: Ruanjiangao is 2.75 au from the Sun and 3.16 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 546842 |
| Provisional designation | 2011 YD3 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 17.39 |
| Orbital period | 4.81 years |
| Semi-major axis | 2.85 au |
| Perihelion – aphelion | 2.32 – 3.38 au |
| Eccentricity | 0.186 |
| Inclination | 6.54° |
| Closest distance between its orbit and Earth's (MOID) | 1.33 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.