19 Fortuna

Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 19 Fortuna | image = {{#invoke:InfoboxImage|InfoboxImage|image=19 Fortuna VLT (2021), deconvolved.pdf|upright={{#if:||1.1}}|alt=}} | caption = | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

| header1 = Discovery

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

| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name=jpldata>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

| data21 = | data22 = {{#if:17.0 October 2024 (JD 2460600.5) |Epoch 17.0 October 2024 (JD 2460600.5)}} | data23 = {{#if: | Uncertainty parameter {{{uncertainty}}}}} | label24 = Observation arc | data24 = | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 2.831 AU (423.443 Gm) | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 2.052 AU (307.028 Gm) | 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 = 2.441 AU (365.235 Gm) | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.159 | label35 = Template:Longitem | data35 = 3.81 a (1393.378 d) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = 18.94 km/s | label38 = Template:Longitem | data38 = 268.398° | label39 = Template:Longitem | data39 = | label40 = Inclination | data40 = 1.573° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 211.379° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 182.091° | 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 = 1.06316 AU | label52 = Mercury MOID | data52 = | label53 = Venus MOID | data53 = | label54 = Mars MOID | data54 = | label55 = Jupiter MOID | data55 = 2.60305 AU | label56 = Saturn MOID | data56 = | label57 = Uranus MOID | data57 = | label58 = Neptune MOID | data58 = | label59 = T_Jupiter | data59 = 3.483

| header60 = Proper orbital elements

| label61 = Template:Longitem | data61 = {{#if: |{{{p_semimajor}}} AU}} | label62 = Template:Longitem | data62 = | label63 = Template:Longitem | data63 = | label64 = Template:Longitem | data64 = {{#if: |{{{p_mean_motion}}} deg Template:\yr}} | label65 = Template:Longitem | data65 = {{#if:|{{#expr:360/1 round 5}} yr
({{#expr:365.25*360/1 round 3}} d) }} | label66 = Template:Longitem | data66 = {{#if:|{{{perihelion_rate}}} arcsec Template:\yr }} | label67 = Template:Longitem | data67 = {{#if:|{{{node_rate}}} arcsec Template:\yr}}

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

| label71 = Dimensions | data71 = (225 × 205 × 195) ± 12 km<ref name=Baer/>
(242 × 203 × 192) ± 10 km<ref name=VLT/> | label72 = Template:Longitem | data72 = Template:Val<ref name=VLT>P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56</ref>
225 km<ref name=Hubble1998>Template:Cite journal</ref><ref name="Baer2007"/> | label73 = Template:Longitem | data73 = | label74 = Template:Longitem | data74 = | label75 = Template:Longitem | data75 = | label76 = Flattening | data76 = 0.21Template:Efn | label77 = Circumference | data77 = | label78 = Template:Longitem | data78 = | label79 = Volume | data79 = | label80 = Mass | data80 = Template:Val<ref name=VLT/>
12.7Template:E kg<ref name=Baer>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> | label81 = Template:Longitem | data81 = Template:Val<ref name=VLT/>
Template:Val<ref name=Baer/> | label82 = Template:Longitem | data82 = ~0.0629 m/s² | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = ~0.1190 km/s | label85 = Template:Longitem | data85 = 7.4432 h (0.3101 d)<ref name=jpldata/>
Template:Val<ref name=VLT/> | label86 = Template:Longitem | data86 = | label87 = Template:Longitem | data87 = | label88 = Template:Longitem | data88 = 29°<ref name=VLT/> | label89 = Template:Longitem | data89 = | label90 = Template:Longitem | data90 = | label91 = Template:Longitem | data91 = Template:Val<ref name=VLT/> | label92 = Template:Longitem | data92 = Template:Val<ref name=VLT/> | label93 = {{#if:yes |Template:Longitem |Albedo}} | data93 = 0.056<ref name=VLT/>
0.037<ref name=jpldata/> | label94 = Temperature | data94 = ~180 K

| data100 = {{#if:|

Surface temp.	min	mean	max
{{{temp_name1}}}
{{{temp_name2}}}
{{{temp_name3}}}
{{{temp_name4}}}

}}

| label101 = Surface absorbed dose rate | data101 = | label102 = Surface equivalent dose rate | data102 = | label103 = Template:Longitem | data103 = G<ref name=jpldata/> | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = 8.88<ref name=AstDys-Fortuna>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> to 12.95 | label106 = Template:Longitem | data106 = 7.49<ref name=jpldata/>
7.13<ref name=VLT/> | label107 = Template:Longitem | data107 = 0.25" to 0.072"

| header110 = Atmosphere

| below = {{#if:||Template:Reflist }}

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19 Fortuna is one of the largest main-belt asteroids. It has a composition similar to 1 Ceres: a darkly colored surface that is heavily space-weathered with the composition of primitive organic compounds, including tholins.

Fortuna is 225 km in diameter and has one of the darkest known geometric albedos for an asteroid over 150 km in diameter. Its albedo has been measured at 0.028 and 0.037.<ref name=Hubble2005>Template:Cite journal</ref> The spectra of the asteroid displays evidence of aqueous alteration.<ref name=Fornasier1999>Template:Citation</ref>

Discovery and naming

It was discovered by J. R. Hind on 22 August 1852, and named after Fortuna, the Roman goddess of luck. Its historical symbol was a star over Fortune's wheel; it was encoded in Unicode 17.0 as U+1CECC 𜻌 (File:Fortuna symbol (fixed width).svg).<ref name=astunicode>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name="Unicode-1CEC0">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Physical characteristics

The Hubble Space Telescope observed Fortuna in 1993. It was resolved with an apparent diameter of 0.20 arcseconds (4.5 pixels in the Planetary Camera) and its shape was found to be nearly spherical. Satellites were searched for but none were detected.

Stellar occultations by Fortuna have been observed several times. Fortuna has been studied by radar.<ref name="detected">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Fortuna has been perturbed by the 80 km 135 Hertha and was initially estimated by Baer to have a mass of 1.08Template:E kg.<ref name="Baer2007">Template:Cite journal</ref> A more recent estimate by Baer suggests it has a mass of 1.27Template:E kg.<ref name=Baer/>

On 21 December 2012, Fortuna (~200 km) harmlessly passed within 6.5 Gm of asteroid 687 Tinette.<ref>Generated with Solex 10 Template:Webarchive by Aldo Vitagliano</ref>

Notes

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19 Fortuna

Contents

Discovery and naming

Physical characteristics

Notes

References

External links

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19 Fortuna

Discovery and naming

Physical characteristics

Notes

References

External links

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