66 Maja

Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 66 Maja | image = {{#invoke:InfoboxImage|InfoboxImage|image=A737.M1234.shape(1).png|upright={{#if:||1.1}}|alt=}} | caption = Lightcurve-based 3D-model of Maja | headerstyle = {{#if:#D6D6D6|background-color:#D6D6D6|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

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

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

| 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 = 156.54 yr (57,178 days) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 3.1021 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 2.1884 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 = 2.6453 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.1727 | label35 = Template:Longitem | data35 = 4.30 yr (1,571 days) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 241.56° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 3.0461° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 7.5071° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 44.071° | 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

| 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 = | label72 = Template:Longitem | data72 = Template:Val km<ref name="Nugent-2015" />
Template:Val km<ref name="Masiero-2017" />
Template:Val km<ref name="AKARI" />
Template:Val km<ref name="SIMPS" />
Template:Val km<ref name="Masiero-2012" />
Template:Val km<ref name="Nugent-2016" /> | 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 = ~Template:Val (calculated)<ref name="Nugent-2015" /> | label81 = Template:Longitem | data81 = Template:Val (assumed)<ref>Template:Cite journal</ref> | label82 = Template:Longitem | data82 = | label83 = Template:Longitem | data83 = | label84 = Template:Longitem | data84 = | label85 = Template:Longitem | data85 = Template:Val h<ref name="Di-Martino-1990" /><ref name="Barucci-1989" />
Template:Val h<ref name="geneva-obs" />
Template:Val h<ref name="Hanus-2016a" />
Template:Val h<ref name="Ditteon-2007" />
Template:Val h<ref name="geneva-obs" />
Template:Val h<ref name="Riccioli-2001" /> | 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="Nugent-2016" />
Template:Val<ref name="Masiero-2012" />
Template:Val<ref name="Nugent-2015" />
Template:Val<ref name="SIMPS" />
Template:Val<ref name="AKARI" />
Template:Val<ref name="Masiero-2017" /> | label94 = Temperature | data94 =

| data100 = {{#if:|

Surface temp.	min	mean	max
{{{temp_name1}}}
{{{temp_name2}}}
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| label101 = Surface absorbed dose rate | data101 = | label102 = Surface equivalent dose rate | data102 = | label103 = Template:Longitem | data103 = Tholen = C<ref name="jpldata" />Template:·C<ref name="lcdb" />
SMASS = Ch<ref name="jpldata" />
B–V = 0.697<ref name="jpldata" />
U–B = 0.360<ref name="jpldata" />
V–R = Template:Val<ref name="Warner-2007i" /> | label104 = Template:Longitem | data104 = | label105 = Template:Longitem | data105 = | label106 = Template:Longitem | data106 = 9.18<ref name="Masiero-2017" />Template:·Template:Val<ref name="Veres-2015" />Template:·9.36<ref name="jpldata" /><ref name="lcdb" /><ref name="Nugent-2015" /><ref name="AKARI" /><ref name="SIMPS" />Template:·Template:Val<ref name="Warner-2007i" />Template:·9.48<ref name="Nugent-2016" />Template:·9.84<ref name="Masiero-2012" /> | label107 = Template:Longitem | data107 =

| header110 = Atmosphere

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

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66 Maja (Template:IPAc-en) is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 71 kilometers in diameter. It was discovered on 9 April 1861, by American astronomer Horace Tuttle at the Harvard College Observatory in Cambridge, Massachusetts, United States.<ref name="MPC-object" /> The asteroid was named after Maia from Greek mythology.<ref name="springer" />

Orbit and classification

Maja is a non-family asteroid from the main belt's background population.<ref name="Ferret" /> It orbits the Sun in the central asteroid belt at a distance of 2.2–3.1 AU once every 4 years and 4 months (1,571 days; semi-major axis of 2.65 AU). Its orbit has an eccentricity of 0.17 and an inclination of 3° with respect to the ecliptic.<ref name="jpldata" /> The body's observation arc begins at the Harvard Observatory, one night after its official discovery observation.<ref name="MPC-object" />

Physical characteristics

In the Tholen classification, Maja is a carbonaceous C-type asteroid,<ref name="jpldata" /> while in the SMASS classification it is a "hydrated" carbonaceous subtype (Ch).<ref name="jpldata" />

Rotation period and spin axes

Several rotational lightcurves of Maja have been obtained from photometric observations since 1988.<ref name="Di-Martino-1990" /><ref name="Barucci-1989" /><ref name="geneva-obs" /><ref name="Ditteon-2007" /><ref name="Riccioli-2001" /> Analysis of the best-rated lightcurve by French amateur astronomers Maurice Audejean and Jérôme Caron from February 2011 gave a rotation period of 9.73509 hours with a brightness amplitude of 0.25 magnitude (Template:Small).<ref name="lcdb" /><ref name="geneva-obs" />

In 2016, a modeled lightcurve was derived from various photometric database sources, giving a concurring sidereal period of 9.73570 hours and two spin axes of (49.0°, −70.0°) and (225.0°, −68.0°) in ecliptic coordinates.<ref name="Hanus-2016a" />

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Maja measures between 62.87 and 82.28 kilometers in diameter and its surface has an albedo between 0.03 and 0.0759.<ref name="Nugent-2015" /><ref name="Masiero-2017" /><ref name="AKARI" /><ref name="SIMPS" /><ref name="Masiero-2012" /><ref name="Nugent-2016" />

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0618 and a diameter of 71.82 kilometers based on an absolute magnitude of 9.36.<ref name="lcdb" /><ref name="SIMPS" />

Naming

This minor planet was named by Harvard's former president, J. Quincy, after Maia, one of the Seven Sisters of the Pleiades in Greek mythology. She is the mother of Hermes (Mercury) and the daughter of Atlas and Pleione. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Template:Small).<ref name="springer" />

The asteroids Template:MoMP, Template:MoMP and Template:MoMP were also named after the mythological Seven Sisters. In 1861, the director of the discovering observatory, George Phillips Bond, raised a minor concern since these names had already been applied to some of the brightest stars of the Pleiades in the constellation of Taurus: Maia, Electra, Asterope and Merope.<ref name="springer" />

Spacecraft visits

At present, Maja has not been visited by any spacecraft. As of 1988, mission planning for the Cassini–Huygens spacecraft included a flyby of Maja while leaving the inner solar system in March 1997, however due to delays, the launch of Cassini-Huygens was moved from April 1996 to October 1997, thus negating the option to pass near Maja. Cassini-Huygens passed by asteroid 2685 Masursky on 23 January 2000 instead.<ref>Outward to the Beginning: the CRAF and Cassini Missions of the Mariner Mark 2 Program; NASA Contractor Report CR-183133, 1 June 1988</ref>

References

Template:Reflist

External links

Disc-Integrated Radar Properties of Main-Belt Asteroids, JPL, Magri (2004)
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 (1)-(5000) – Minor Planet Center
Template:AstDys
Template:JPL small body

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66 Maja

Contents

Orbit and classification

Physical characteristics

Rotation period and spin axes

Diameter and albedo

Naming

Spacecraft visits

References

External links

Navigation menu

66 Maja

Orbit and classification

Physical characteristics

Rotation period and spin axes

Diameter and albedo

Naming

Spacecraft visits

References

External links

Navigation menu

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