6223 Dahl

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Template:Short description Template:EngvarB Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 6223 Dahl | image = {{#invoke:InfoboxImage|InfoboxImage|image=NGC772 SN2003hl SN2003iq 6223 Dahl.jpg|upright={{#if:||1.1}}|alt=}} | caption = Template:Longitem | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

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

| label2 = Discovered by | data2 = A. Mrkos | label3 = Discovery site | data3 = Kleť Obs. | label4 = Discovery date | data4 = 3 September 1980 | label5 = Template:Longitem | data5 =

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

| label11 = Template:Longitem | data11 = (6223) Dahl | label12 = Pronunciation | data12 = | label13 = Template:Longitem | data13 = Roald Dahl
Template:Small<ref name="springer" /> | label14 = Template:Longitem | data14 = Template:MpTemplate:·1949 XC
1972 YSTemplate:·Template:Mp
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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 = 67.02 yr (24,479 days) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 3.0674 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 2.4039 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 = 2.7356 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.1213 | label35 = Template:Longitem | data35 = 4.52 yr (1,653 days) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 38.698° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 3.8564° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 294.31° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 76.334° | 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 = TJupiter | data59 =

| header60 = Proper orbital elements

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

| label71 = Dimensions | data71 = 16.81 km Template:Small<ref name="lcdb" />
Template:Nowrap | 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 = Template:Val h<ref name="Waller-2013" /> | 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" />
Template:Val<ref name="WISE" />
0.057 Template:Small<ref name="lcdb" /> | label94 = Temperature | data94 =

| data100 = {{#if:|

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| label101 = Surface absorbed dose rate | data101 = | label102 = Surface equivalent dose rate | data102 = | label103 = Template:Longitem | data103 = C<ref name="lcdb" /> | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = | label106 = Template:Longitem | data106 = 12.6<ref name="jpldata" /><ref name="lcdb" /><ref name="WISE" /> | label107 = Template:Longitem | data107 =

| header110 = Atmosphere

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6223 Dahl, provisional designation Template:Mp, is a carbonaceous asteroid from the central region of the asteroid belt, approximately 18 kilometres in diameter. It was discovered on 3 September 1980, by Czech astronomer Antonín Mrkos at Kleť Observatory near České Budějovice in the Czech Republic.<ref name="MPC-Dahl" /> The asteroid was named after author of children's books, Roald Dahl.<ref name="springer" />

Orbit and classification

Dahl orbits the Sun in the central main-belt at a distance of 2.4–3.1 AU once every 4 years and 6 months (1,653 days). Its orbit has an eccentricity of 0.12 and an inclination of 4° with respect to the ecliptic.<ref name="jpldata" /> The first precovery was taken at the US Goethe Link Observatory in 1949, extending the asteroid's observation arc by 31 years prior to its discovery.<ref name="MPC-Dahl" />

Physical characteristics

Dahl has been characterised as a dark, carbonaceous C-type asteroid.<ref name="lcdb" />

Lightcurves

In November 2011, a rotational lightcurve of Dahl was obtained by Brett Waller at the Cedar Green Observatory in Virginia in the United States. It gave a rotation period of Template:Val hours with a brightness variation of 0.43 in magnitude (Template:Small).<ref name="Waller-2013" />

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Dahl measures 19.6 kilometres in diameter and its surface has a low albedo of 0.034,<ref name="WISE" /> while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 16.8 kilometres, as the higher the albedo (reflectivity), the lower a body's diameter for certain absolute magnitude.<ref name="lcdb" />

Naming

This minor planet was named in memory of the Welsh author Roald Dahl (1916–1990), known for his classic children's books Willy Wonka and the Chocolate Factory and James and the Giant Peach.<ref name="springer" /> The approved naming citation was published by the Minor Planet Center on 28 August 1996 (Template:Small).<ref name="MPC-Circulars-Archive" />

References

Template:Reflist

Template:Minor planets navigator {{#invoke:Navbox|navbox}} Template:Authority control

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