Results

Provisional Designation: object’s provisional designation (when available) as assigned from its discovery date.

Number: object’s number as designated by Minor Planets Center.

Name: object’s name as designated by the International Astronomical Union.

Date: date of the event in the format year-month-day.

Local: countries acronyms from where the event was detected.

Chords: number of positive detections. This represents the number of detections, or telescopes, that provided light curves. If they were at the same site, or over the same line on the shadow path, they might not improve the knowledge of the object profile, but they are counted here anyway.

Radius (equatorial) (km): equatorial radius in kilometre of the object as derived from the observed event, or as given in the respective reference. If it is a single chord event, this represents the half-length of the observed chord.

Error Radius (equatorial): error, in kilometre, of the equatorial radius. If it is a single chord event, it represents the lower limit of the equatorial radius, and is represented by the ’>’ symbol.

Equivalent Radius (km): this is only available when a shape could be obtained from the occultation, that is, when three or more chords where detected, or two chords when a spherical shape can be assumed. If the object is oblate, this represents the same surface that a disk with this radius would have. For an oblate or Maclaurin object it can be calculated from \(R_{eqv} = { \sqrt{R_{equa} . R_{pol}}} = R_{equa} { \sqrt{1-e}}\) where \(R_{pol}\) is the polar semi-major axis and e is the oblateness. If the object has a tri-axial shape or a Jacobi shape then \(R_{eqv} = (a.b.c)^{1/3}\), were a, b and c are the three axis of rotation symmetry. Here we use the values derived from the occultation if the equivalent radius is not given in the corresponding reference.

Error Equivalent Radius: error, in kilometers, of the equivalent radius.

Oblatness: object’s oblateness. Can be obtained from \(e = (a - c) / a\), where a is the equatorial radius and c is the polar radius (or semi-minor axis). The value can be apparent, as measured from the occultation, or real according to the respective reference.

Error oblateness: oblateness error.

b/a: assuming \(a>b>c\), the three axis of rotation symmetry for a tri-axial body, the ratio b/a is a relation of the two equatorial radius. It is equal to unity for a Maclaurin equilibrium shape.

c/a: following the same definitions as above, it is a relation between the biggest equatorial radius and polar radius.

Albedo (V): visual albedo of the object, as derived from the surface area obtained from the detected stellar occultation and given in the respective reference.

Error Albedo: error of the derived albedo.

Density (\(g/cm³\)): object’s density, as given in the respective reference, considering the derived or assumed volume from the occultation result. The density can be derived from the knowledge of its mass. Alternatively, it can also be obtained under the assumption of hydrostatic equilibrium, using the body oblateness associated with its rotation period can be used to derive its density.

Error Density: density error in \(g/cm³\) unities.

Atmosphere (nbar): derived atmosphere surface pressure, or at a given distance, in nanobars. When the number is preceded by the symbol ’<’, it represents an upper limit to the presence of a putative atmosphere.

Atm gas: atmospheric gases used to study the atmosphere and derive the given pressure.

Detected feature: if any feature was detected, like rings, chasm, atmosphere, dust, jets, satellite, if the object is double or a binary, if an unknown secondary star was occulted, or any other physical property measured thanks to the stellar occultation.

Shape: derived or assumed shape as obtained from the particular event, or as given on the respective reference. It can be equilibrium figures like Maclaurin, Jacobi or simply spherical, oblate, tri-axial, irregular, binary or undetermined shape. Single or double chord detections will most probably lead to an undetermined shape.

Kind: what was detected, the main body, or only a satellite, only the ring(s), only the atmosphere, only jets/dust. Alternatively, it can indicate that the event was double, i.e. the occultation has probed two components of the system.

DynClass: object’s dynamical class. Trojans are small bodies orbiting the Lagrangian points of a major body. Planet satellites are small bodies orbiting a planet. There is no consensus or formal definition on the dynamical classes of Centaur and Trans-Neptunian Objects (TNOs), so we decided to base our classification on the Deep Ecliptic Survey [18]. Centaurs are small solar system objects that have unstable orbits with perihelia greater than 5.2 astronomical unity (au) and orbital semi-major axis smaller than that of Neptune (a < 30.1 au). TNOs are objects with an orbital semi-major axis (a) greater than that of Neptune (a > 30.1 au); they are divided into different classes according to their orbital properties. In this work, these classes are defined as follows. The Kuiper Belt is a region extending from 30 to 50 au and is divided into three sub-classes, the Cold-classical and Hot-classical populations (also known as Cubewanos) [19], and the Resonant objects that are locked by Neptune in integer orbital period ratio with it. Among the resonant, we can find the Plutinos, which are in 2:3 resonance, such as Pluto. The Cold-classical objects have orbital eccentricity smaller than 0.2 and inclination smaller than 12 degrees; in contrast, the Hot-classical members have higher eccentricity and inclination values. The Scattered population objects are those highly perturbed by Neptune, as they have perihelia between 30.1 and 40 au with high eccentricity. The Detached objects are well beyond Neptune’s orbit, away from any perturbation from it, with perihelia greater than 40 au.

Delta (au): distance of the object centre to the geocentre, in astronomical units, at the event date.

Star G mag.: magnitude of the occulted star in the ’G’ wavelengths, as given by Gaia DR2.

Object G mag.: magnitude of the occulting object in the ’G’ wavelengths.

Position date: date and time in UTC of the object’s astrometric position as derived from the stellar occultation.

Semi-major axis (au): Object’s orbital semi-major axis in astronomical units.

Eccentricity: object’s orbital eccentricity.

Inclination: object’s orbital inclination with respect to the ecliptic plane.

Lucky Star project: if the event was predicted, observed and/or analyzed by a Lucky Star project collaborator.

Reference: reference to the publication from which the information was obtained. The references are active links to the journal or any other kind of publication. When only a preliminary result was obtained, the event is indicated as preliminary and should be used with caution.

DOI: Digital Object Identifier (DOI) number of the reference.