1516 Henry

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| 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 = 79.00 yr (28,854 days) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 3.1087 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 2.1368 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 = 2.6227 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.1853 | label35 = Template:Longitem | data35 = 4.25 yr (1,551 days) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 216.91° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 8.7440° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 125.84° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 94.457° | 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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({{#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 = Template:Val km<ref name="Nugent-2016" />
Template:Val km<ref name="SIMPS" />
19.98 km Template:Small<ref name="lcdb" />
Template:Val km<ref name="Masiero-2011" />
Template:Val km<ref name="WISE" />
Template:Val km<ref name="Nugent-2015" />
Template:Val km<ref name="AKARI" /> | 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="Polishook-2012b" />
Template:Val h<ref name="geneva-obs" /> | 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" />
Template:Val<ref name="Nugent-2015" />
Template:Val<ref name="AKARI" />
Template:Val<ref name="SIMPS" />
0.0701 Template:Small<ref name="lcdb" />
Template:Val<ref name="Nugent-2016" /> | label94 = Temperature | data94 =

| data100 = {{#if:|

Surface temp.	min	mean	max
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| header110 = Atmosphere

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1516 Henry (provisional designation Template:Mp) is a stony asteroid from the middle region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 28 January 1938, by French astronomer André Patry at Nice Observatory in southeastern France.<ref name="MPC-Henry" /> It is named for French astronomers and opticians, Paul and Prosper Henry.<ref name="springer" />

Orbit and classification

The S-type asteroid orbits the Sun in the central main-belt at a distance of 2.1–3.1 AU once every 4 years and 3 months (1,551 days). Its orbit has an eccentricity of 0.19 and an inclination of 9° with respect to the ecliptic.<ref name="jpldata" /> No precoveries were taken, and no prior identifications were made. Henry's observation arc starts at Nice in August 1939, or 19 months after its official discovery observation.<ref name="MPC-Henry" />

Physical characteristics

In May 2005, a rotational lightcurve of Henry was obtained by French amateur astronomer Christophe Demeautis. It gave a rotation period of 17.370 hours with a brightness variation of 0.54 magnitude (Template:Small).<ref name="geneva-obs" /> In February 2010, photometric observations by David Polishook and others at the Californian Palomar Transient Factory gave a divergent period of 10 hours with an amplitude of only 0.04 (Template:Small).<ref name="Polishook-2012b" />

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Henry measures between 19.19 and 28.55 kilometers in diameter, and its surface has an albedo between 0.039 and 0.070.<ref name="Nugent-2016" /><ref name="SIMPS" /><ref name="Masiero-2011" /><ref name="WISE" /><ref name="Nugent-2015" /><ref name="AKARI" /> The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0701 and a diameter of 19.98 kilometers with an absolute magnitude of 12.0.<ref name="lcdb" />

Naming

This minor planet is named for the two brothers Paul Henry and Prosper Henry (1848–1905 and 1849–1903, respectively), who each discovered seven asteroids. As opticians, they constructed the 76-cm refracting telescope at Nice Observatory, among others. While mapping the ecliptic during their Carte du Ciel survey, they made all their fourteen, low-numbered asteroid discoveries, starting with 125 Liberatrix.

The Henry Brothers are also honored by the lunar crater Henry Frères. The Martian crater Henry was named in honour of Paul.<ref name="springer" /> The official Template:MoMP was published by the Minor Planet Center on 1 April 1978 (Template:Small).<ref name="DoMP-Circular-dates" />

References

Template:Reflist

External links

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

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

1516 Henry

Contents

Orbit and classification

Physical characteristics

Naming

References

External links

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1516 Henry

Orbit and classification

Physical characteristics

Naming

References

External links

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