astro.wikisort.org - Asteroid

45300 Thewrewk, provisional designation 2000 AF₄₅, is a dark background asteroid from the outer regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 1 January 2000, by astronomers Krisztián Sárneczky and László Kiss at the Piszkéstető Station of the Konkoly Observatory in Hungary.[6] The asteroid was named after Hungarian astronomer Aurél Ponori Thewrewk.[2]

45300 Thewrewk

Thewrewk imaged by Krisztián Sárneczky in January 2000
Discovery [1]
Discovered by	K. Sárneczky L. Kiss
Discovery site	Piszkéstető Stn.
Discovery date	1 January 2000
Designations
MPC designation	(45300) Thewrewk
Named after	Aurél Ponori Thewrewk [2] (Hungarian astronomer)
Alternative designations	2000 AF45 · 1998 XX37
Minor planet category	main-belt [1] · (outer) background [3] · Eos [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	18.48 yr (6,748 days)
Aphelion	3.3504 AU
Perihelion	2.8562 AU
Semi-major axis	3.1033 AU
Eccentricity	0.0796
Orbital period (sidereal)	5.47 yr (1,997 days)
Mean anomaly	262.37°
Mean motion	0° 10m 49.08s / day
Inclination	10.238°
Longitude of ascending node	263.41°
Argument of perihelion	63.556°
Physical characteristics
Dimensions	13.230±0.164 km[5]
Geometric albedo	0.077±0.009[5]
Absolute magnitude (H)	13.1[1]

Orbit and classification

When applying the hierarchical clustering method to this asteroid's proper orbital elements, Thewrewk is both a non-family asteroid from the main belt's background population (according to Nesvorný) and a core member of the Eos family (according to Milani and Knežević).[3][4] It orbits the Sun in the outer asteroid belt at a distance of 2.9–3.4 AU once every 5 years and 6 months (1,997 days; semi-major axis of 3.10 AU). Its orbit has an eccentricity of 0.08 and an inclination of 10° with respect to the ecliptic.[1] The body's observation arc begins in December 1998, with its first observations as 1998 XX₃₇ at Lincoln Laboratory's Experimental Test Site, New Mexico.[6]

Physical characteristics

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Thewrewk measures 13.230 kilometers in diameter and its surface has an albedo of 0.077.[5]

Rotation period

As of 2017, no rotational lightcurve of Thewrewk has been obtained from photometric observations. The body's rotation period, shape and poles remain unknown.[1][7]

Naming

This minor planet was named after Hungarian astronomer Aurél Ponori Thewrewk (1921–2014), who was an expert on the history of astronomy, director of Urania Public Observatory and the Budapest Planetarium, as well honorary president of the Hungarian Astronomical Association (HAA).[2]

The official naming citation was published by the Minor Planet Center on 25 January 2005 (M.P.C. 53471).[8]

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 (45001)-(50000) – Minor Planet Center
• 45300 Thewrewk at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 45300 Thewrewk at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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