| Discovery A | |
|---|---|
| Discoverer | A. Borrelly |
| Discovery date | March 31, 1891 |
| Alternate designations B |
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| Category | Main belt |
| Orbital elements C | |
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| Eccentricity (e) | 0. In Astrodynamics, under standard assumptions, any Orbit must be of Conic section shape 038 |
| Semi-major axis (a) | 411. In Geometry, the semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolae 542 Gm (2. For other meanings see Giga (disambiguation Giga- (symbol G is a prefix in the SI system of units denoting 109 The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International 751 AU) |
| Perihelion (q) | 395. The astronomical unit ( AU or au or au or sometimes ua) is a unit of Length based on the distance from the Earth to the In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 843 Gm (2. 646 AU) |
| Aphelion (Q) | 427. In Celestial mechanics, an apsis, plural apsides (ˈæpsɨdɪːz is the point of greatest or least distance of the Elliptical orbit of an object from 242 Gm (2. 856 AU) |
| Orbital period (P) | 1666. The orbital period is the time taken for a given object to make one complete Orbit about another object 571 d (4. A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the 56 a) |
| Mean orbital speed | 17. In Astronomy, a Julian year (symbol a) is a unit of measurement of Time defined The orbital speed of a body generally a Planet, a Natural satellite, an artificial satellite, or a Multiple star, is the speed at which it 96 km/s |
| Inclination (i) | 4. The second ( SI symbol s) sometimes abbreviated sec, is the name of a unit of Time, and is the International System of Units Inclination in general is the Angle between a Reference plane and another plane or axis of direction 364° |
| Longitude of the ascending node (Ω) |
181. This article describes the unit of angle For other meanings see Degree. The longitude of the ascending node (☊ or Ω is one of the Orbital elements used to specify the Orbit of an object in space 927° |
| Argument of perihelion (ω) |
109. The argument of periapsis (or argument of perifocus) ( ω) is the Orbital element describing the Angle of an Orbiting body's periapsis 987° |
| Mean anomaly (M) | 248. In the study of orbital dynamics the mean anomaly of an orbiting body is the Angle the body would have traveled about the center of the orbit's Auxiliary circle 11° |
| Physical characteristics D | |
| Dimensions | 141. For the majority of numbered Asteroids almost nothing is known apart from a few physical parameters 0 km |
| Mass | unknown |
| Density | unknown |
| Surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Spectral class | T |
| Absolute magnitude | 8. Mass is a fundamental concept in Physics, roughly corresponding to the Intuitive idea of how much Matter there is in an object The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different Gravitation is a natural Phenomenon by which objects with Mass attract one another In Physics, escape velocity is the speed where the Kinetic energy of an object is equal to the magnitude of its Gravitational potential energy The rotation period of an astronomical object is the time it takes to complete one revolution around its Axis of rotation relative to the background stars Asteroids are assigned a type based on spectral shape Color, and sometimes Albedo. T-type asteroids are rare inner-belt Asteroids of unknown composition with dark featureless and moderately Red spectra, and a moderate absorption feature In Astronomy, absolute magnitude (also known as absolute visual magnitude) is the Apparent magnitude an object would have if it were at a standard 17 |
| Albedo (geometric) | unknown |
| Mean surface temperature |
unknown |
308 Polyxo is a very large Main belt asteroid. The albedo of an object is the extent to which it diffusely reflects light from the sun The geometric albedo of an astronomical body is the ratio of its actual brightness at zero phase angle (i Temperature is a physical property of a system that underlies the common notions of hot and cold something that is hotter generally has the greater temperature The asteroid belt is the region of the Solar System located roughly between the orbits of the Planets Mars and Jupiter. Asteroids, sometimes called Minor planets or planetoids', are bodies—primarily of the inner Solar System —that are smaller than planets but It is classified as a rare T-type asteroid. T-type asteroids are rare inner-belt Asteroids of unknown composition with dark featureless and moderately Red spectra, and a moderate absorption feature
It was discovered by A. Borrelly on March 31, 1891 in Marseilles. Events 307 - After divorcing his wife Minervina, Constantine marries Fausta, the daughter of the retired Roman Emperor Year 1891 ( MDCCCXCI) was a Common year starting on Thursday (link will display the full calendar of the Gregorian calendar (or a Common Marseille, ( English alt Marseilles mɑrˈseɪ — French: maʁsɛj locally — Provençal Occitan: Marselha maʀˈsijɔ
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