The uncertainty parameter U is introduced by the Minor Planet Center (MPC) to quantify the uncertainty of a perturbed orbital solution for a minor planet...

One way to categorize the sources of uncertainty is to consider: Parameter This comes from the model parameters that are inputs to the computer model...

universe is not an exactly known parameter at all times. When events transpire at very short time intervals, there is uncertainty in the energy of these events...

agreement, this uncertainty has a probabilistic basis and reflects incomplete knowledge of the quantity value. It is a non-negative parameter. The measurement...

of uncertainty (or propagation of error) is the effect of variables' uncertainties (or errors, more specifically random errors) on the uncertainty of...

Observational info 224 Oceana at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters v t e...

gravitational parameter μ of a celestial body is the product of the gravitational constant G and the mass M of that body. For two bodies, the parameter may be...

timestamps have a lesser effect. A very short arc leaves a high uncertainty parameter. The object might be in one of many different orbits, at many distances...

model inputs are subject to sources of uncertainty, including errors of measurement, errors in input data, parameter estimation and approximation procedure...

A parameter (from Ancient Greek παρά (pará) 'beside, subsidiary' and μέτρον (métron) 'measure'), generally, is any characteristic that can help in defining...

In economics, Knightian uncertainty is a lack of any quantifiable knowledge about some possible occurrence, as opposed to the presence of quantifiable...

info 162 Laurentia at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters v t e...

Observational info 435 Ella at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters v t e...

March 2025 indicate that it has a diameter of 60 m (200 ft), with an uncertainty of 7 m (23 ft). This makes 2024 YR4 around the same size as the asteroid...

"uncertainty" value, separated by a semicolon, representing the uncertainty of the location in meters, and is described using the "u" URI parameter. A...

for various sources of uncertainty in model input and design. A related field is sensitivity analysis. A calibrated parameter does not necessarily represent...

properties · Summary 4769 Castalia at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters...

to 2017 OF201. 2017 OF201 at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters...

Observational info 207 Hedda at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters v t e...

Apophis has no chance of impacting Earth in the next 100 years. The uncertainty in the 2029 approach distance has been reduced from hundreds of kilometres...

Observational info 3412 Kafka at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters...

info 454 Mathesis at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters v t e...

designation 2017 BX232 was assigned to the object. After its orbital uncertainty parameter dropped to 0, the asteroid was numbered (697402). Discovery credit...

have come within 0.0825 AU (12.3 million km) of Earth, but with an uncertainty parameter of 9, the orbit is poorly determined. Another, larger near-Earth...

optimization problems that involve uncertainty. A stochastic program is an optimization problem in which some or all problem parameters are uncertain, but follow...

info 296 Phaëtusa at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters v t e...

Observational info 6159 Andréseloy at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters...

info 303 Josephina at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters v t e...

Summary (444004) 2004 AS1 at the JPL Small-Body Database Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters...

the measurements of angular positions; a 74-year observation arc; an uncertainty region controlled by resonance. Main-belt asteroid 78 Diana (~125 km...