4923 Clarke

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Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 4923 Clarke | image = {{#invoke:InfoboxImage|InfoboxImage|image=4923 Clarke (orbit).gif|upright={{#if:||1.1}}|alt=}} | caption = Orbital diagram of Clarke | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

| header1 = Discovery<ref name="MPC-object" />

| label2 = Discovered by | data2 = S. J. Bus | label3 = Discovery site | data3 = Siding Spring Obs. | label4 = Discovery date | data4 = 2 March 1981 | label5 = Template:Longitem | data5 =

| header10 = {{#if:|Designations|Designations}}

| label11 = Template:Longitem | data11 = (4923) Clarke | label12 = Pronunciation | data12 = | label13 = Template:Longitem | data13 = Arthur C. Clarke<ref name="MPC-object" />
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| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name="jpldata" />

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| header60 = Proper orbital elements

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| header70 = Template:Anchor{{#if:yes| Physical characteristics|Physical characteristics}}

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4923 Clarke, provisional designation Template:Mp, is a stony background asteroid from the inner regions of the asteroid belt, approximately Template:Convert in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia.<ref name="MPC-object" /> The spheroidal S-type asteroid has a rotation period of 3.14 hours.<ref name="lcdb" /> It was named after British science fiction writer Arthur C. Clarke.<ref name="MPC-object" /> On the same night, Schelte Bus also discovered 5020 Asimov.

Orbit and classification

Clarke is a non-family asteroid from the main belt's background population.<ref name="AstDys-object" /> It orbits the Sun in the inner main-belt at a distance of 1.7–2.6 AU once every 3 years and 2 months (1,147 days; semi-major axis of 2.14 AU). Its orbit has an eccentricity of 0.20 and an inclination of 7° with respect to the ecliptic.<ref name="jpldata" />

The asteroid was first observed as Template:Mp at Crimea–Nauchnij in July 1972. The body's observation arc begins at the Siding Spring Observatory two weeks prior to its official discovery observation on 12 February 1981.<ref name="MPC-object" />

Physical characteristics

In the SMASS classification, Clarke is a common, stony S-type asteroid.<ref name="jpldata" /><ref name="lcdb" />

Rotation period

Three rotational lightcurves of Clarke have been obtained from photometric observations by the APT Observatory Group in Spain, by astronomers at the Palomar Transient Factory in California, and by Czech astronomer Petr Pravec at Ondřejov Observatory (Template:Small).<ref name="Aznar-2017b" /><ref name="Waszczak-2015" />Template:Efn Analysis of the best-rated lightcurve gave a rotation period of 3.143 hours with a consolidated brightness amplitude between 0.03 and 0.14 magnitude, which indicates that the body has a nearly spheroidal, non-elongated shape (Template:Small).<ref name="lcdb" /><ref name="Aznar-2017b" />

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Clarke measures between 3.367 and 3.532 kilometers in diameter and its surface has an albedo between 0.3259 and 0.366.<ref name="Masiero-2014" /><ref name="WISE" /> The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and calculates a diameter of 4.10 kilometers based on an absolute magnitude of 14.3.<ref name="lcdb" />

Naming

This minor planet was named after the science fiction writer Arthur C. Clarke (1917–2008), author of 2001: A Space Odyssey.<ref name="MPC-object" /> The official naming citation was prepared with assistance from Richard Binzel and published by the Minor Planet Center on 3 May 1996 (Template:Small). The asteroid's name independently suggested by Duncan Steel (Template:Small).<ref name="MPC-Circulars-Archive" />

In the postscript to his novel 3001: The Final Odyssey, Clarke jokingly expresses disappointment that he did not receive asteroid 2001 as his namesake; instead, it was named for Albert Einstein.Template:Citation needed

Notes

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References

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Template:Minor planets navigator {{#invoke:Navbox|navbox}} Template:Arthur C. Clarke Template:Authority control

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