26858 Misterrogers

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Template:Short description Template:Use dmy dates {{#invoke:infobox|infoboxTemplate | class = vcard | titleclass = fn org | title = 26858 Misterrogers | image = {{#invoke:InfoboxImage|InfoboxImage|image=|upright={{#if:||1.1}}|alt=}} | caption = | headerstyle = {{#if:#FA8072|background-color:#FA8072|background-color:#E0CCFF}}; color:inherit; | labelstyle = max-width:{{#if:||11em}}; | autoheaders = y

| header1 = Discovery<ref name="MPC-object" /><ref name="Ferret" />

| label2 = Discovered by | data2 = E. F. Helin | label3 = Discovery site | data3 = Palomar Obs. | label4 = Discovery date | data4 = March 21, 1993 | label5 = Template:Longitem | data5 =

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

| label11 = Template:Longitem | data11 = (26858) Misterrogers | label12 = Pronunciation | data12 = Template:IPAc-en | label13 = Template:Longitem | data13 = Fred Rogers<ref name="MPC-object" />
Template:Nowrap | label14 = Template:Longitem | data14 = 1993 FRTemplate:·1952 SU
Template:Mp | label15 = Template:Longitem | data15 = Mars crosser<ref name="MPC-object" /><ref name="jpldata" /><ref name="lcdb" /> | label16 = Adjectives | data16 = | label17 = Symbol | data17 =

| header20 = Orbital characteristics{{#ifeq:|yes| (barycentric)}}<ref name="jpldata" />

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| header60 = Proper orbital elements

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

| label71 = Dimensions | data71 = | label72 = Template:Longitem | data72 = Template:Val<ref name="Nugent-2015" /><ref name="Mainzer-2016" />
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Template:Val<ref name="AKARI" />
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| header110 = Atmosphere

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26858 Misterrogers (Template:IPAc-en), provisional designation Template:Mp, is a stony asteroid and sizable Mars-crosser on an eccentric orbit from the asteroid belt, approximately Template:Convert in diameter. It was discovered on March 21, 1993, by American astronomer Eleanor Helin at the Palomar Observatory in California.<ref name="MPC-object" /> The likely S-type asteroid has a rotation period of 8.0 hours.<ref name="lcdb" /> It was named after children's television host Fred Rogers.<ref name="MPC-object" />

Orbit and classification

Misterrogers is a member of the Mars-crossing asteroids, a dynamically unstable group between the main belt and the near-Earth populations, crossing the orbit of Mars at 1.66 AU.<ref name="MPC-object" /> It orbits the Sun at a distance of 1.5–3.1 AU once every 3 years and 7 months (1,311 days; semi-major axis of 2.34 AU). Its orbit has an eccentricity of 0.34 and an inclination of 22° with respect to the ecliptic.<ref name="jpldata" />

The asteroid was first observed as Template:Mp at the Goethe Link Observatory in September 1952. The body's observation arc begins with a precovery published by the Digitized Sky Survey, taken at Palomar in May 1990, almost 3 years prior to its official discovery observation.<ref name="MPC-object" />

Naming

This minor planet was named after Fred McFeely Rogers (1928–2003), who was the host of the children's television program Mister Rogers' Neighborhood for more than 30 years.<ref name="MPC-object" /> The naming was proposed, and citation prepared, by Dr. John G. Radzilowicz, Director of the Henry Buhl, Jr. Planetarium & Observatory at the Kamin Science Center in Pittsburgh, Pennsylvania.<ref name="Eonline" /> The official Template:MoMP was published by the Minor Planet Center on May 1, 2003 (Template:Small).<ref name="MPC-Circulars-Archive" />

Rogers had a lifelong fascination with the sky and astronomy, obtained a pilot's license while still in high school<ref name="Rogers-Wonder" /> and also produced with the Kamin Science Center a planetarium show called The Sky above Mister Rogers' Neighborhood,<ref name="Planetarium" /> which is still shown at many planetaria across the United States.<ref name="Carnegie-shows" />

Physical characteristics

Misterrogers is an assumed, stony S-type asteroid. In line with the body's determined albedo (see below).<ref name="lcdb" />

Rotation period

In April 2011, a rotational lightcurve of Misterrogers was obtained from photometric observations by Brian A. Skiff at Anderson Mesa Station. Lightcurve analysis gave a well-defined rotation period of Template:Val hours with a brightness variation of 0.13 magnitude (Template:Small).Template:Efn A low brightness amplitude is indicative for a spherical rather than elongated shape.

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Misterrogers measures 6.33 kilometers in diameter and its surface has an albedo of 0.28.<ref name="Nugent-2015" /><ref name="Mainzer-2016" /> However, a WISE-study dedicated to Mars-crossing asteroids in 2017 determined a larger diameter of 8.19 kilometers with an albedo of 0.20.<ref name="Ali-Lagoa-2017" /> The Japanese Akari satellite found a diameter of 8.07 km and an albedo of 0.208,<ref name="AKARI" /> while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 7.82 kilometers based on an absolute magnitude of 12.9.<ref name="lcdb" />

Sizable Mars-crosser

With a diameter of 8.2 kilometers, Misterrogers is a sizable Mars-crosser of which two dozens or so are known (5–15 km). These include 3581 Alvarez (13.7 km) 1065 Amundsenia (9.8 km), 1139 Atami (9.4 km), 3737 Beckman (14.4 km), 1474 Beira (15.5 km), 5682 Beresford (7.3 km), 7505 Furusho (10.0 km) 7369 Gavrilin (5.5 km), 1011 Laodamia (7.4 km), 6170 Levasseur (5.7 km), 1727 Mette (5.4 km), 1131 Porzia (7.1 km), 985 Rosina (8.2 km), 1235 Schorria (5.6 km), 1310 Villigera (15.2 km), and 1468 Zomba (7 km), which are themselves smaller than the largest members of this dynamical group, namely, 132 Aethra, 323 Brucia (former Mars-crosser), 1508 Kemi, 2204 Lyyli and 512 Taurinensis, all larger than 20 kilometers.

Notes

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References

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Template:Minor planets navigator {{#invoke:Navbox|navbox}} Template:Mister Rogers' Neighborhood Template:Authority control

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