Video Experimental Relacionado
Updated: Jun 19, 2026
06:48
Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
Published on: May 10, 2020
La forma y variación de la superficie de 2 Pallas desde el Telescopio Espacial Hubble
B E Schmidt1, P C Thomas, J M Bauer
1Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095, USA. britneys@ucla.edu
Science (New York, N.Y.)
|October 10, 2009
Resumen
Las imágenes del Hubble revelan que 2 Pallas tiene distintas variaciones de superficie y una característica de impacto. Su densidad sugiere la formación de material rico en agua, lo que indica que es un protoplaneta intacto.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Investigación de asteroides Investigación de asteroides.
- La astronomía observacional es la astronomía de las observaciones.
Sus antecedentes:
- 2 Pallas es un gran asteroide, el segundo cuerpo más masivo en el cinturón de asteroides.
- Estudios anteriores sugirieron que las pallas pueden ser diferenciadas y poseer un contenido de agua significativo.
Objetivo del estudio:
- Para analizar las características de la superficie y las propiedades físicas del asteroide 2 Pallas.
- Para investigar el origen y la evolución de 2 Pallas.
Principales métodos:
- Adquisición y análisis de imágenes de alta resolución del Telescopio Espacial Hubble.
- Análisis fotométrico y espectrofotométrico de las características superficiales.
- Modelado de la forma y cálculos de densidad basados en las dimensiones observadas.
Principales resultados:
- Se observaron distintas variaciones de color y albedo a través de la superficie de 2 Pallas.
- Forma elíptica determinada con radios de 291, 278 y 250 km.
- Densidad calculada de 2400 kg/m3, consistente con el material rico en agua.
- Identificación de una gran característica de impacto (240 km de diámetro) dentro de un terreno oscuro y ultravioleta.
Conclusiones:
- 2 Pallas es un protoplaneta intacto, no totalmente diferenciado.
- El asteroide ha experimentado una importante excavación por impacto y alteración interna.
- Su composición sugiere la formación en una región rica en hielo de agua.
Videos de Conceptos Relacionados
01:30Geometry of Hyperbolas
A hyperbola consists of all points where the absolute difference of distances to two fixed points, called foci, remains constant. The standard equation isEach branch extends infinitely and approaches two asymptotes, which guide the curve’s behavior. The parameters a and b define key features: a measures the distance from the center to each vertex along the transverse axis, while b influences the slopes of the asymptotes. The asymptotes have equationsA rectangle centered at the origin with...
01:24Theorem of Pappus
The Theorem of Pappus, also known as the Pappus–Guldinus Theorem, provides a geometric method for determining the volume and surface area of solids generated by the revolution of a plane region or a plane curve about an external axis. The theorem consists of two related statements. The first addresses the volume of solids formed by rotating plane areas, while the second addresses the surface area generated by rotating plane curves. Both results depend on the location of the centroid, which...
01:12Theorems of Pappus and Guldinus: Problem Solving
Pappus and Guldinus's theorems are powerful mathematical principles that are used for finding the surface area and volume of composite shapes. For example, consider a cylindrical storage tank with a conical top. Finding the surface area or volume can be challenging for such complex shapes. These theorems are particularly useful in calculating the volume and surface area of such systems. Here, the cylindrical storage tank with a conical top can be broken down into two simple shapes: a cylinder...
01:30Hyperbolas
A hyperbola is a conic section produced when a double-napped cone is intersected by a plane at an angle steeper than the slope of the cone, such that it cuts through both nappes. This intersection yields two separate, mirror-image curves known as branches, which open away from each other along the transverse axis. The nearest points on each branch to the hyperbola’s center are termed vertices, and the distance from the center to a vertex is denoted by a. Perpendicular to the transverse axis is...
01:27Gauss's Law: Planar Symmetry
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
01:28Cylinders in Three-Dimensional Space
A cylindrical surface is generated when a two-dimensional profile curve is translated along a straight line in three-dimensional space. The translated copies of the curve form a surface composed of parallel rulings, each oriented in the same fixed direction. This construction allows many three-dimensional forms to be described using relatively simple planar equations.In Cartesian coordinates, a cylindrical surface is often recognized by an equation that omits one of the three variables. For...