1989 Tatry, provisional designation , is a carbonaceous Vestian

asteroid An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). As ...

and tumbling slow rotator from the inner regions of the

asteroid belt The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids ...

, approximately 16 kilometers in diameter. It was discovered on 20 March 1955, by the Slovakian astronomers

Alois Paroubek This is a list of minor-planet discoverers credited by the Minor Planet Center with the discovery of one or several minor planets (such as near-Earth object, near-Earth and main-belt asteroids, Jupiter trojans and Distant minor planet, distant ob ...

and

Regina Podstanická Regina Podstanická (née Šáškyová; 25 March 1928 – 20 November 2000) was a Slovak astronomer. She co-discovered 1989 Tatry, the first minor planet discovered from Slovakia. Life Podstanická was born as Regina Šáškyová on 20 March 19 ...

at Skalnate Pleso Observatory, Slovakia, and named for the

High Tatra Mountains The High Tatras or High Tatra Mountains (; ; ,'' Vysoki Tatry''; ; ), are a mountain range along the border of northern Slovakia in the Prešov Region, and southern Poland in the Lesser Poland Voivodeship. They are a range of the Tatra Mountains ...

. It was their only minor planet discovery.

Orbit and classification

Based on its orbital elements, the asteroid is a member of the

Vesta family The Vesta family (adj. ''Vestian''; ) is a family of asteroids. The cratering family is located in the inner asteroid belt in the vicinity of its namesake and principal body, 4 Vesta. It is one of the largest asteroid families with more tha ...

and classified as a carbonaceous

C-type asteroid C-type (carbonaceous ) asteroids are the most common variety, forming around 75% of known asteroids. They are volatile-rich and distinguished by a very low albedo because their composition includes a large amount of carbon, in addition to rocks ...

in the SMASS taxonomy. It orbits the Sun in the inner main-belt at a distance of 2.2–2.5 AU once every 3 years and 7 months (1,317 days). Its orbit has an

eccentricity Eccentricity or eccentric may refer to: * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal" Mathematics, science and technology Mathematics * Off-Centre (geometry), center, in geometry * Eccentricity (g ...

of 0.08 and an

inclination Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a reference plane and the orbital plane or axis of direction of the orbiting object. For a satellite orbiting the Eart ...

of 8 ° with respect to the

ecliptic The ecliptic or ecliptic plane is the orbital plane of Earth's orbit, Earth around the Sun. It was a central concept in a number of ancient sciences, providing the framework for key measurements in astronomy, astrology and calendar-making. Fr ...

. It was first identified as at the South African

Union Observatory Union Observatory, also known as Transvaal Observatory, Republic Observatory and Johannesburg Observatory ( 078), is a defunct astronomical observatory in Johannesburg, South Africa that operated from 1903 to 1971. It is located on Observatory R ...

in 1935, extending the asteroid's

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. It is usually given in days or years. The term is mostly use ...

by 20 years prior to its official discovery.

Diameter and albedo

According to the surveys carried out by the Japanese

Akari AKARI (ASTRO-F) was an infrared astronomy satellite developed by Japan Aerospace Exploration Agency, in cooperation with institutes of Europe and Korea. It was launched on 21 February 2006, at 21:28 UTC (06:28, 22 February JST) by M-V rocket ...

satellite, and NASA's

Wide-field Infrared Survey Explorer Wide-field Infrared Survey Explorer (WISE, List of observatory codes, observatory code C51, Explorer 92 and MIDEX-6) was a NASA infrared astronomy Space observatory, space telescope in the Explorers Program launched in December 2009.. . WISE L ...

with its subsequent

NEOWISE Wide-field Infrared Survey Explorer (WISE, observatory code C51, Explorer 92 and MIDEX-6) was a NASA infrared astronomy space telescope in the Explorers Program launched in December 2009.. . WISE discovered thousands of minor planets and nu ...

mission, the asteroid measures between 8.99 and 9.87 kilometers in diameter and its surface has an

albedo Albedo ( ; ) is the fraction of sunlight that is Diffuse reflection, diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects ...

between 0.175 and 0.262. The ''Collaborative Asteroid Lightcurve Link'' assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a much larger diameter of 16.8 kilometers, as the lower the albedo (reflectivity), the higher the diameter at a constant absolute magnitude (brightness).

Lightcurves

Photometric measurements of the asteroid made in January 2005, by astronomer

Brian D. Warner Brian Dale Warner (born 1952) is an American Amateur astronomy, amateur astronomer and computer programmer. In 2006 he was awarded the inaugural Chambliss Amateur Achievement Award by the American Astronomical Society. From the 1990s to 2011 W ...

at his ''Palmer Divide Observatory'', Colorado, gave a

lightcurve In astronomy, a light curve is a graph (discrete mathematics), graph of the Radiance, light intensity of a celestial object or region as a function of time, typically with the magnitude (astronomy), magnitude of light received on the ''y''-axis ...

with a

period Period may refer to: Common uses * Period (punctuation) * Era, a length or span of time *Menstruation, commonly referred to as a "period" Arts, entertainment, and media * Period (music), a concept in musical composition * Periodic sentence (o ...

of hours and a brightness variation of below in

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

. However, the data was incomplete, so the period is considered suspect (). Further measurements made in October 2007, by

Adrián Galád Adrián Galád (born 1970) is a Slovakia, Slovak astronomer and a discoverer of minor planets. He is credited by the Minor Planet Center with the discovery and co-discovery of 81 numbered minor planets between 1995 and 2009, most of them in coll ...

Leonard Kornoš Leonard Kornoš (born 1956) is a Slovakia, Slovak astronomer and a prolific discoverer of asteroids. Career He is a lecturer at Comenius University in Bratislava, Slovakia, and known for his astrometric and Photometry (astronomy), photometric ...

and

Štefan Gajdoš This is a list of minor-planet discoverers credited by the Minor Planet Center with the discovery of one or several minor planets (such as near-Earth and main-belt asteroids, Jupiter trojans and distant objects). , the discovery of 612,011 num ...

Modra Observatory The Astronomical Observatory of Modra (), also known as Modra Observatory or the Astronomical and Geophysical observatory in Modra, is an astronomical observatory located in Modra, Slovakia. It is owned and operated by the Comenius University in B ...

in Slovakia, showed a much longer period of hours with a brightness variation of 0.5 in magnitude (). In March 2009, a fragmentary lightcurve obtained by French amateur astronomer

Pierre Antonini Pierre Antonini is a retired French mathematics professor and amateur astronomer who has discovered several minor planets and two supernovae at his private Observatoire de Bédoin (Bedoin Observatory; observatory code: 132) located at Bédoin ...

gave a period of 24 hours ().

Tumbler

The observers also detected a non-principal axis rotation seen in distinct rotational cycles in successive order. This is commonly known as tumbling. ''Tatry'' is one of a group of less than 200 bodies known to be is such a state ''(also see List of tumblers).''

Naming

This

minor planet According to the International Astronomical Union (IAU), a minor planet is an astronomical object in direct orbit around the Sun that is exclusively classified as neither a planet nor a comet. Before 2006, the IAU officially used the term ''minor ...

is named after the location of the discovering observatory,

High Tatras The High Tatras or High Tatra Mountains (; ; ,'' Vysoki Tatry''; ; ), are a mountain range along the border of northern Slovakia in the Prešov Region, and southern Poland in the Lesser Poland Voivodeship. They are a range of the Tatra Mountains ...

(), the highest mountain range in northern Slovakia. The approved naming citation was published by the

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). Founded in 1947, it operates at the Smithsonian Astrophysical Observatory. Funct ...

on 1 February 1980 ().

References

External links

Lightcurve plot of 1989 Tatry
Palmer Divide Observatory, B. D. Warner (2005)
Asteroid Lightcurve Database (LCDB)
query form

)
Dictionary of Minor Planet Names
Google books

– Observatoire de Genève, Raoul Behrend

– Minor Planet Center * * {{DEFAULTSORT:Tatry 001989 Named minor planets 001989 001989 19550320