25924 Douglasadams

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| header1 = Discovery<ref name="jpldata" />

| label2 = Discovered by | data2 = LINEAR | label3 = Discovery site | data3 = Lincoln Lab's ETS | label4 = Discovery date | data4 = 19 February 2001 | label5 = Template:Longitem | data5 =

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

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| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name="jpldata" />

| data21 = | data22 = {{#if:4 September 2017 (JD 2458000.5) |Epoch 4 September 2017 (JD 2458000.5)}} | data23 = {{#if:0 | Uncertainty parameter 0}} | label24 = Observation arc | data24 = 20.30 yr (7,415 days) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 2.8155 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 2.0147 AU | label28 = Peri{{#if:|{{{apsis}}}|apsis}} | data28 = | label29 = {{#switch:{{{apsis}}} |helion|astron=Ap{{{apsis}}} |Apo{{#if:|{{{apsis}}}|apsis}}}} | data29 = | label30 = Periastron | data30 = | label31 = Apoastron | data31 = | label32 = Template:Longitem | data32 = 2.4151 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.1658 | label35 = Template:Longitem | data35 = 3.75 yr (1,371 days) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 51.562° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 1.7272° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 307.27° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 313.38° | label46 = Template:Nowrap | data46 = | label47 = Satellite of | data47 = | label48 = Group | data48 = | label49 = {{#switch: |yes|true=Satellites |Known satellites}} | data49 = | label50 = Star | data50 = | label51 = Earth MOID | data51 = | label52 = Mercury MOID | data52 = | label53 = Venus MOID | data53 = | label54 = Mars MOID | data54 = | label55 = Jupiter MOID | data55 = | label56 = Saturn MOID | data56 = | label57 = Uranus MOID | data57 = | label58 = Neptune MOID | data58 = | label59 = T_Jupiter | data59 =

| header60 = Proper orbital elements

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

| label71 = Dimensions | data71 = Template:Val km<ref name="Masiero-2011" /> | label72 = Template:Longitem | data72 = | label73 = Template:Longitem | data73 = | label74 = Template:Longitem | data74 = | label75 = Template:Longitem | data75 = | label76 = Flattening | data76 = | label77 = Circumference | data77 = | label78 = Template:Longitem | data78 = | label79 = Volume | data79 = | label80 = Mass | data80 = | label81 = Template:Longitem | data81 = | label82 = Template:Longitem | data82 = | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = | label85 = Template:Longitem | data85 = | label86 = Template:Longitem | data86 = | label87 = Template:Longitem | data87 = | label88 = Template:Longitem | data88 = | label89 = Template:Longitem | data89 = | label90 = Template:Longitem | data90 = | label91 = Template:Longitem | data91 = | label92 = Template:Longitem | data92 = | label93 = {{#if:yes |Template:Longitem |Albedo}} | data93 = Template:Val<ref name="Masiero-2011" /> | label94 = Temperature | data94 =

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Surface temp.	min	mean	max
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| header110 = Atmosphere

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25924 Douglasadams (provisional designation Template:Mp) is a Nysian asteroid from the inner regions of the asteroid belt, approximately 2.4 kilometers in diameter. It was discovered on 19 February 2001, by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site in New Mexico, United States. The asteroid was named for novelist Douglas Adams.<ref name="MPC-object" />

Orbit and classification

Douglasadams is a member of the Nysa family (Template:Small),<ref name="Ferret" /> better described as the Nysa–Polana complex, as it contains at least three asteroid families with distinct spectral types (SFC).<ref name="Nesvorny-2014" />Template:Rp It orbits the Sun in the inner main-belt at a distance of 2.0–2.8 AU once every 3 years and 9 months (1,371 days). Its orbit has an eccentricity of 0.17 and an inclination of 2° with respect to the ecliptic.<ref name="jpldata" />

The body's observation arc begins with a precovery taken by Spacewatch at Kitt Peak Observatory in January 1997, more than four years prior to its official discovery observation at Lincoln Lab's ETS.<ref name="MPC-object" />

Physical characteristics

The spectral type of Douglasadams is unknown. Based on its albedo (see below) it is likely a common stony S-type asteroid.<ref name="jpldata" />

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Douglasadams measures 2.410 kilometers in diameter and its surface has an albedo of 0.210.<ref name="Masiero-2011" /> It has an absolute magnitude of 15.6.<ref name="jpldata" />

Rotation period

As of 2017, no rotational lightcurve of Douglasadams has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown.<ref name="lcdb" />

Naming

This minor planet was named in memory of English novelist Douglas Adams (1952–2001), because its provisional designation Template:Mp happened to contain the year of his death, his initials, and the Answer to the Ultimate Question of Life, the Universe, and Everything (42), as given in his novel serial The Hitchhiker's Guide to the Galaxy.<ref name="springer" /> The official naming citation was published by the Minor Planet Center on 25 January 2005 (Template:Small).<ref name="MPC-Circulars-Archive" />

The asteroid 18610 Arthurdent, discovered by Felix Hormuth in 1998, was named after the bewildered hero of Douglas Adams's The HitchhikerTemplate:'s Guide to the Galaxy.

External links

• Asteroid named after 'Hitchhiker' humorist: Late British sci-fi author honored after cosmic campaign by Alan Boyle, MSNBC, 2005
• Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (25001)-(30000) – Minor Planet Center
• Template:AstDys
• Template:JPL small body

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