astro.wikisort.org - Asteroid

1134 Kepler, provisional designation 1929 SA, is a stony asteroid and eccentric Mars-crosser from the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 25 September 1929, by German astronomer Max Wolf at Heidelberg Observatory in southwest Germany.[3] It is named after Johannes Kepler.[2]

(1134) Kepler

Discovery[1]
Discovered by	M. F. Wolf
Discovery site	Heidelberg Obs.
Discovery date	25 September 1929
Designations
MPC designation	(1134) Kepler
Named after	Johannes Kepler (astronomer)[2]
Alternative designations	1929 SA · 1951 SA
Minor planet category	Mars-crosser[1][3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc	86.62 yr (31,638 days)
Aphelion	3.9338 AU
Perihelion	1.4219 AU
Semi-major axis	2.6779 AU
Eccentricity	0.4690
Orbital period (sidereal)	4.38 yr (1,601 days)
Mean anomaly	320.25°
Mean motion	0° 13m 29.64s / day
Inclination	15.312°
Longitude of ascending node	5.7988°
Argument of perihelion	332.89°
Earth MOID	0.4329 AU
Physical characteristics
Dimensions	4±1 km (generic)[4]
Synodic rotation period	0.1148 day[5]
Spectral type	SMASS = S[1]
Absolute magnitude (H)	14.2[1]

Orbit and classification

Kepler orbits the Sun at a distance of 1.4–3.9 AU once every 4 years and 5 months (1,601 days). Its orbit has an eccentricity of 0.47 and an inclination of 15° with respect to the ecliptic.[1] The body's observation arc begins at Heidelberg, the night after its official discovery observation.[3]

Physical characteristics

In the SMASS taxonomy, Kepler is a stony S-type asteroid.[1]

Diameter and albedo

Its diameter has not been estimated by any of the prominent space-based surveys such as the Infrared Astronomical Satellite IRAS (1982), the Japanese Akari satellite (2006), NASA's Wide-field Infrared Survey Explorer (2009) or its subsequent NEOWISE mission (2013).[1] Based on a generic magnitude-to-diameter conversion, Kepler's diameter is between 3 and 8 kilometer for an absolute magnitude of 14.2 and an assumed albedo in the range of 0.25 to 0.05.[4] Since its spectral type falls into the class of stony asteroids, which have an averaged standard albedo around 0.20, Kepler's generic diameter is close to 4 kilometers, as the higher a body's albedo (reflectivity), the shorter its diameter at a fixed absolute magnitude (brightness).[4]

Kepler's rotation period is 0.1148 day,[5] a pretty common value for asteroids of this size.[6][7]

Naming

This minor planet was named on the commemoration of the 300th death anniversary of astronomer Johannes Kepler (1571–1630), best known for his laws of planetary motion. Kepler is also honored by a lunar and Martian crater, by Kepler Dorsum – a mountain ridge on the Martian moon Phobos, and by Kepler's Supernova.[2]

Naming citation was first published in 1930, in the astronomy journal Astronomical Notes (AN 240, 135).[2] The space observatory Kepler and its many discovered exoplanets also bear his name (see also Kepler (disambiguation)).

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1134 Kepler at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1134 Kepler at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (1134) Kepler

(1134) Kepler ist ein Asteroid des Hauptgürtels, der am 25. September 1929 vom deutschen Astronomen Max Wolf in Heidelberg entdeckt wurde.

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- [en] 1134 Kepler

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[ru] (1134) Кеплер

(1134) Кеплер (нем. Kepler) — астероид, относящийся к группе астероидов пересекающих орбиту Марса и принадлежащий к спектральному классу S. Он был открыт 25 сентября 1929 года немецким астрономом Максом Вольфом в обсерватории Хайдельберг в Германии и назван в честь немецкого астронома и математика, автора трёх законов движения планет Иоганна Кеплера[1].

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