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1991 BA

Index 1991 BA

1991 BA is a sub-kilometer asteroid, classified as near-Earth object of the Apollo group that was first observed by Spacewatch on 18 January 1991, and passed within 160,000 km (100,000 mi) of Earth. [1]

Table of Contents

  1. 32 relations: Apollo asteroid, Asteroid, Astronomical unit, Beta Taurids, Central Bureau for Astronomical Telegrams, Curve fitting, Earth, Fat Man, Impact event, Jet Propulsion Laboratory, JPL Horizons On-Line Ephemeris System, Julian day, Julian year (astronomy), Kitt Peak National Observatory, Lost minor planet, Lunar distance, Metre, Minor Planet Center, Moon, NASA, Near-Earth object, NEODyS, Nuclear weapon yield, Observation arc, Peter Jenniskens, Sentry (monitoring system), Spacewatch, Strewn field, Sudan, Sun, Uncertainty parameter, 68–95–99.7 rule.

  2. Astronomical objects discovered in 1991
  3. Lost minor planets
  4. Near-Earth objects in 1991
  5. Potential impact events caused by near-Earth objects

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. 1991 BA and Apollo asteroid are Apollo asteroids.

See 1991 BA and Apollo asteroid

Asteroid

An asteroid is a minor planet—an object that is neither a true planet nor an identified comet— that orbits within the inner Solar System.

See 1991 BA and Asteroid

Astronomical unit

The astronomical unit (symbol: au, or AU) is a unit of length defined to be exactly equal to.

See 1991 BA and Astronomical unit

Beta Taurids

The Beta Taurids (β–Taurids) are an annual meteor shower belonging to a class of "daytime showers" that peak after sunrise.

See 1991 BA and Beta Taurids

Central Bureau for Astronomical Telegrams

The Central Bureau for Astronomical Telegrams (CBAT) is the official international clearing house for information relating to transient astronomical events.

See 1991 BA and Central Bureau for Astronomical Telegrams

Curve fitting

Curve fitting is the process of constructing a curve, or mathematical function, that has the best fit to a series of data points, possibly subject to constraints.

See 1991 BA and Curve fitting

Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

See 1991 BA and Earth

Fat Man

"Fat Man" (also known as Mark III) was the codename for the type of nuclear weapon the United States detonated over the Japanese city of Nagasaki on 9 August 1945.

See 1991 BA and Fat Man

Impact event

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

See 1991 BA and Impact event

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.

See 1991 BA and Jet Propulsion Laboratory

JPL Horizons On-Line Ephemeris System

JPL Horizons On-Line Ephemeris System provides access to key Solar System data and flexible production of highly accurate ephemerides for Solar System objects.

See 1991 BA and JPL Horizons On-Line Ephemeris System

Julian day

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).

See 1991 BA and Julian day

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.

See 1991 BA and Julian year (astronomy)

Kitt Peak National Observatory

The Kitt Peak National Observatory (KPNO) is a United States astronomical observatory located on Kitt Peak of the Quinlan Mountains in the Arizona-Sonoran Desert on the Tohono Oʼodham Nation, west-southwest of Tucson, Arizona.

See 1991 BA and Kitt Peak National Observatory

Lost minor planet

A minor planet is "lost" when today's observers cannot find it, because its location is too uncertain to target observations. 1991 BA and Lost minor planet are Lost minor planets.

See 1991 BA and Lost minor planet

Lunar distance

The instantaneous Earth–Moon distance, or distance to the Moon, is the distance from the center of Earth to the center of the Moon.

See 1991 BA and Lunar distance

Metre

The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI).

See 1991 BA and Metre

Minor Planet Center

The Minor Planet Center (MPC) is the official body for observing and reporting on minor planets under the auspices of the International Astronomical Union (IAU).

See 1991 BA and Minor Planet Center

Moon

The Moon is Earth's only natural satellite.

See 1991 BA and Moon

NASA

The National Aeronautics and Space Administration (NASA) is an independent agency of the U.S. federal government responsible for the civil space program, aeronautics research, and space research.

See 1991 BA and NASA

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).

See 1991 BA and Near-Earth object

NEODyS

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

See 1991 BA and NEODyS

Nuclear weapon yield

The explosive yield of a nuclear weapon is the amount of energy released such as blast, thermal, and nuclear radiation, when that particular nuclear weapon is detonated, usually expressed as a TNT equivalent (the standardized equivalent mass of trinitrotoluene which, if detonated, would produce the same energy discharge), either in kilotonnes (kt—thousands of tonnes of TNT), in megatonnes (Mt—millions of tonnes of TNT), or sometimes in terajoules (TJ).

See 1991 BA and Nuclear weapon yield

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.

See 1991 BA and Observation arc

Peter Jenniskens

Petrus Matheus Marie (Peter) Jenniskens (born 1962 in Meterik) is a Dutch-American astronomer and a senior research scientist at the Carl Sagan Center of the SETI Institute and at NASA Ames Research Center.

See 1991 BA and Peter Jenniskens

Sentry (monitoring system)

Sentry is a highly automated impact prediction system operated by the JPL Center for NEO Studies (CNEOS) since 2002.

See 1991 BA and Sentry (monitoring system)

Spacewatch

The Spacewatch Project is an astronomical survey that specializes in the study of minor planets, including various types of asteroids and comets at University of Arizona telescopes on Kitt Peak near Tucson, Arizona.

See 1991 BA and Spacewatch

Strewn field

A strewn field is the area where meteorites from a single fall are dispersed.

See 1991 BA and Strewn field

Sudan

Sudan, officially the Republic of the Sudan, is a country in Northeast Africa.

See 1991 BA and Sudan

Sun

The Sun is the star at the center of the Solar System.

See 1991 BA and Sun

Uncertainty parameter

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.

See 1991 BA and Uncertainty parameter

68–95–99.7 rule

In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

See 1991 BA and 68–95–99.7 rule

See also

Astronomical objects discovered in 1991

Lost minor planets

Near-Earth objects in 1991

Potential impact events caused by near-Earth objects

References

[1] https://en.wikipedia.org/wiki/1991_BA

Also known as 1991BA, 1991BA asteroid, Asteroid 1991BA.