Petit-Prince (moon)
Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = Petit-Prince | image = {{#invoke:InfoboxImage|InfoboxImage|image=|upright={{#if:||1.1}}|alt=}} | caption = CFHT time-lapse image of Eugenia and Petit-Prince, showing five stages in the moon's orbit. The 'flare' around them is an imaging artifact. | headerstyle = {{#if:#A0FFA0|background-color:#A0FFA0|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y
| header1 = Discovery<ref name="IAUC7129">IAUC 7129, announcing the discovery</ref>
| label2 = Discovered by
| data2 = W. J. Merline, L. M. Close,
C. Dumas, C. R. Chapman,
F. Roddier, F. Menard,
D. C. Slater, G. Duvert,
J. C. Shelton, T. Morgan
| label3 = Discovery site
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| label4 = Discovery date
| data4 = 1 November 1998
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| header10 = {{#if:|Designations|Designations}}
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| data11 = (45) Eugenia I
| label12 = Pronunciation
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{{#invoke:IPA|main}}
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| data13 = Napoléon, Prince Imperial and The Little Prince
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| data15 = Main belt
| label16 = Adjectives
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| label17 = Symbol
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| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name="Marchis">synthesis of several observations Template:Webarchive, F. Marchis.</ref>
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| data22 = {{#if: |Epoch {{{epoch}}}}}
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| label24 = Observation arc
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| label25 = Earliest precovery date
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| label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}}
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| label27 = Peri{{#if:|{{{apsis}}}|helion}}
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| label28 = Peri{{#if:|{{{apsis}}}|apsis}}
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| label29 = {{#switch:{{{apsis}}} |helion|astron=Ap{{{apsis}}} |Apo{{#if:|{{{apsis}}}|apsis}}}}
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| label30 = Periastron
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| label31 = Apoastron
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| data32 = 1184 ± 12 km
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| label34 = Eccentricity
| data34 = 0.0100 ± 0.0002
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| data35 = 4.766 ± 0.001 d
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| data37 = 18.1 m/s
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| label40 = Inclination
| data40 = 7.0 ± 0.1°
(with respect to Eugenia equator)
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| label46 = Template:Nowrap
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| label47 = Satellite of
| data47 = 45 Eugenia
| label48 = Group
| data48 =
| label49 = {{#switch: |yes|true=Satellites |Known satellites}}
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| label50 = Star
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| label51 = Earth MOID
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| label52 = Mercury MOID
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| label53 = Venus MOID
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| label54 = Mars MOID
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| label55 = Jupiter MOID
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| label56 = Saturn MOID
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| label57 = Uranus MOID
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| label58 = Neptune MOID
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| label59 = TJupiter
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| header60 = Proper orbital elements
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| data61 = {{#if: |{{{p_semimajor}}} AU}}
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| data64 = {{#if: |{{{p_mean_motion}}} degTemplate:\yr}}
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| data65 = {{#if:|{{#expr:360/1 round 5}} yr
({{#expr:365.25*360/1 round 3}} d) }}
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| data66 = {{#if:|{{{perihelion_rate}}} arcsecTemplate:\yr }}
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| data67 = {{#if:|{{{node_rate}}} arcsecTemplate:\yr}}
| header70 = Template:Anchor{{#if:yes| Physical characteristics|Physical characteristics}}
| label71 = Dimensions | data71 = ~ 13 km (estimate) <ref name="size">Assuming the same albedo as Eugenia, then using the difference in absolute magnitude</ref> | 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 = ~ 1.2Template:E kg (estimate) <ref name="mass">Assuming same density and albedo as Eugenia</ref> | label81 = Template:Longitem | data81 = | label82 = Template:Longitem | data82 = | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = ~ 5 m/s (estimate) | 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 = | label94 = Temperature | data94 =
| data100 = {{#if:|
{{#if:|}}{{#if:|}}{{#if:|}}{{#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 = | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = | label106 = Template:Longitem | data106 = 13.6 <ref name="Merline99">Template:Cite journal</ref> | label107 = Template:Longitem | data107 =
| header110 = Atmosphere
| label111 = Template:Longitem | data111 = | label112 = Template:Longitem | data112 = | label113 = Composition by volume | data113 =
| below = {{#if:||Template:Reflist }}
}}{{#invoke:Check for unknown parameters|check|unknown=Template:Main other|preview=Page using Template:Infobox planet with unknown parameter "_VALUE_"|ignoreblank=y| abs_magnitude | adjective | adjectives | albedo | allsatellites | alt_names | angular_dist | angular_size | aphelion | apoapsis | apsis | apoastron | arg_peri | asc_node | atmosphere | atmosphere_composition | atmosphere_ref | avg_speed | axial_tilt | background | barycentric | bgcolour | caption | circumference | declination | density | dimensions | discovered | discoverer | discovery_method | discovery_ref | discovery_site | earliest_precovery_date | eccentricity | epoch | equatorial_radius | escape_velocity | exosolar planets | extrasolarplanet | family | flattening | group | image | image_alt | image_scale | inclination | jupiter_moid | label_width | long_periastron | magnitude | mars_moid | mass | max_temp_1 | max_temp_2 | max_temp_3 | max_temp_4 | mean_anomaly | mean_diameter | mean_motion | mean_orbit_radius | mean_radius | mean_temp_1 | mean_temp_2 | mean_temp_3 | mean_temp_4 | mercury_moid | min_temp_1 | min_temp_2 | min_temp_3 | min_temp_4 | minorplanet | moid | moment_of_inertia_factor | mp_category | mp_name | mpc_name | name | named_after | neptune_moid | node_rate | note | observation_arc | orbit_diagram | orbit_ref | p_eccentricity | p_inclination | p_mean_motion | p_orbit_ref | p_semimajor | periapsis | periastron | perihelion | perihelion_rate | period | physical_ref | polar_radius | pole_ecliptic_lat | pole_ecliptic_lon | pronounce | pronounced | right_asc_north_pole | rot_velocity | rotation | satellite_of | satellites | saturn_moid | scale_height | semi-amplitude | semimajor | sidereal_day | single_temperature | spectral_type | star | surface_area | surface_grav | surface_pressure | surface_absorbed_dose_rate | surface_equivalent_dose_rate | symbol | synodic_period | temp_name1 | temp_name2 | temp_name3 | temp_name4 | time_periastron | tisserand | uncertainty | uranus_moid | venus_moid | volume }} Petit-Prince, formal designation (45) Eugenia I, is the larger, outer moon of asteroid 45 Eugenia. It was discovered in 1998 by astronomers at the Canada-France-Hawaii Telescope on Mauna Kea, Hawaii. Initially, it received the provisional designation S/1998 (45) 1. Petit-Prince was the first asteroid moon to be discovered with a ground-based telescope. Previously, the only known moon of an asteroid was Dactyl, discovered by the Galileo space probe, around 243 Ida.
Characteristics
Petit-Prince is 13 km in diameter, compared to 45 Eugenia's 214 km. It takes five days to complete an orbit around Eugenia.
Name
The discoverers chose the name in honour of Empress Eugénie's son, the Prince Imperial.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> However, they also intended an allusion to the children's book The Little Prince by Antoine de Saint-Exupéry, which is about a prince who lives on an asteroid.<ref name="William">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
In their submission of the name to the IAU, the discovers justified the double meaning by arguing for similarities between the Prince Imperial and the Little Prince:
- "Both princes were young and adventurous, and had little fear of danger. Both were of rather small stature. They both left the confines of their cozy little worlds (asteroid B612 for the Little Prince and Chislehurst for the Prince Imperial). They both then undertook long journeys to end up in Africa, whereupon they both meet rather violent deaths ... And in both cases, they lay alone for one night each after "death" and then "returned" back home..."<ref name="William" />
See also
- 2578 Saint-Exupéry
- 46610 Bésixdouze, named B-six-twelve in French (and whose number equals the hexadecimal number B612)
References
External links
- Data sheet compiled by W. Robert Johnston
- IAUC 7503 Template:Webarchive, announcing Petit-Prince's naming
- orbit details compiled by F. Marchis, includes diagrams
{{#invoke:Navbox|navbox}} Template:Antoine de Saint-Exupéry