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2020 XR, the Glossary

2020 XR is an Apollo near-Earth object and potentially hazardous asteroid roughly in diameter.^[1]

21 relations: Apollo asteroid, Apsis, Degree (angle), Elongation (astronomy), Epoch (astronomy), Haleakalā Observatory, Impact event, Jet Propulsion Laboratory, Julian day, Julian year (astronomy), Near-Earth object, NEODyS, Observation arc, Orbital period, Palermo Technical Impact Hazard Scale, Pan-STARRS, Perturbation (astronomy), Potentially hazardous object, Precovery, Sentry (monitoring system), 1,000,000,000.
Astronomical objects discovered in 2020
Near-Earth objects in 2021

Apollo asteroid

The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s. 2020 XR and Apollo asteroid are Apollo asteroids.

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Apsis

An apsis is the farthest or nearest point in the orbit of a planetary body about its primary body.

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Degree (angle)

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle in which one full rotation is 360 degrees.

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Elongation (astronomy)

In astronomy, a planet's elongation is the angular separation between the Sun and the planet, with Earth as the reference point.

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Epoch (astronomy)

In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity.

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Haleakalā Observatory

The Haleakalā Observatory, also known as the Haleakalā High Altitude Observatory Site, is Hawaii's first astronomical research observatory.

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Impact event

An impact event is a collision between astronomical objects causing measurable effects.

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Jet Propulsion Laboratory

Jet Propulsion Laboratory (JPL) is a Federally Funded Research and Development Center (FFRDC) in La Cañada Flintridge, California, Crescenta Valley, United States.

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The Julian day is the continuous count of days since the beginning of the Julian period, and is used primarily by astronomers, and in software for easily calculating elapsed days between two events (e.g. food production date and sell by date).

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Julian year (astronomy)

In astronomy, a Julian year (symbol: a or aj) is a unit of measurement of time defined as exactly 365.25 days of SI seconds each.

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Near-Earth object

A near-Earth object (NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun (perihelion) is less than 1.3 times the Earth–Sun distance (astronomical unit, AU).

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NEODyS

NEODyS (Near Earth Objects Dynamic Site) is an Italian service that provides information on near-Earth objects with a Web-based interface.

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Observation arc

In observational astronomy, the observation arc (or arc length) of a Solar System body is the time period between its earliest and latest observations, used for tracing the body's path.

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Orbital period

The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object.

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Palermo Technical Impact Hazard Scale

The Palermo Technical Impact Hazard Scale is a logarithmic scale used by astronomers to rate the potential hazard of impact of a near-Earth object (NEO).

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Pan-STARRS

The Panoramic Survey Telescope and Rapid Response System (Pan-STARRS1; obs. code: F51 and Pan-STARRS2 obs. code: F52) located at Haleakala Observatory, Hawaii, US, consists of astronomical cameras, telescopes and a computing facility that is surveying the sky for moving or variable objects on a continual basis, and also producing accurate astrometry and photometry of already-detected objects. 2020 XR and Pan-STARRS are Discoveries by Pan-STARRS.

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Perturbation (astronomy)

In astronomy, perturbation is the complex motion of a massive body subjected to forces other than the gravitational attraction of a single other massive body.

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Potentially hazardous object

A potentially hazardous object (PHO) is a near-Earth object – either an asteroid or a comet – with an orbit that can make close approaches to the Earth and which is large enough to cause significant regional damage in the event of impact. 2020 XR and potentially hazardous object are potentially hazardous asteroids.

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References

[1] https://en.wikipedia.org/wiki/2020_XR