Bruce Berger's Astronomy Blog

Well, we saw it – or rather we saw it, then it winked out, and then it was there again. Magnitude 10.5 TYCO 0528-00946-1 star in Aquarius winked out for about 2 seconds while Gary Jacobson, Ken Cantrell, Marion Hochuli, Tom Calderwood and I watched.
This was an occultation by 694 Ekard, a 12.6 Mag asteroid [...]

INTRODUCTION
The scientific interest in asteroids is due largely to their status as the remnant debris from the inner solar system formation process. Because some of these objects can collide with the Earth, asteroids are also important for having significantly modified the Earth’s biosphere in the past. They will continue to do so in the future. [...]

Some Wikipedia info on 55636 (source link here)

(55636) 2002 TX300

Discovery

Discovered by
NEAT

Discovery date
October 15, 2002

Designations

MPC designation
(55636) 2002 TX300

Alternate name
none

Minor planet
category
Trans-Neptunian object (TNO)
cubewano

Orbital characteristics

Epoch December 31, 2006 (JD 2454100.5)

Aphelion
7252.615 Gm (48.481 AU)

Perihelion
5654.528 Gm (37.798 AU)

Semi-major axis
6453.572 (43.139 AU

Eccentricity
0.124

Orbital period
103492.895 d (283.35 a

Average orbital?speed
4.52 km/s

Mean anomaly
62.175?

Inclination
25.856?

Longitude?of ascending?node
324.575?

Argument of perihelion
338.907?

Physical characteristics

Dimensions
435??709 km

Mass
1.6?3.7??1020? kg

Mean density
2.0? g/cm?

Equatorial surface?gravity
0.15?0.20? m/s?

Escape velocity
0.28?0.37? [...]