Prospects for predicted returns are discouraging. Only one small near-Earth asteroid will have a return conducive to light curve work during the next 5 years. 1993 VD may brighten to in October of 2002 though its orbital uncertainty will necessitate that it be rediscovered by a wide-field survey. If the current rate of discovery continues, nearly a dozen or more objects will be well placed for study during the normal course of scheduled observing each year. Unlike much slower rotating objects, short period light curves can be well determined in only an hour or two making study of these objects a small drain on observing resources. The necessary condition is an ability to schedule and perform observations on a short notice, often within a few days after discovery.
The work at Ondrejov has been supported by the Grant Agency of the Academy of Sciences of the Czech Republic, Grant A3003708, and by the Grant Agency of the Czech Republic, Grant No. 205-99-0255.
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a used in binning and read out in a subarray, in order to get the faster readout times.
a See Table 1 for observer's names, telescopes and instrumentation.
b Errors are relative with respect to other points within the given night.
a Mean diameter estimated from the absolute magnitude; see referencesfor assumptions on geometric albedos.
b Period half of this value is not ruled out but not considered likely.
c Most likely solution.
(1) orbital data from MPC 36572/physical data from this paper,
(2) MPC 36570/this paper,
(3) MPC 33380/this paper,
(4) MPC 32089/Ostro et al. (1999),
(5) MPC 26191/Steel et al. (1997).
H, Vmax, V<18, V<18 Disc., and are the absolute magnitude, maximum V magnitude, days brighter than V=18, days brighter than V=18 since discovery and time interval between discovery and peak brightness (negative for peak before discovery), respectively.