719 Albert

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| 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 = 105.57 yr (38,560 days) | label25 = Earliest precovery date | data25 = | label26 = {{#switch:{{{apsis}}} |apsis|gee|barion|center|centre|(apsis)=Apo{{{apsis}}} |Ap{{#if:|{{{apsis}}}|helion}}}} | data26 = 4.0830 AU | label27 = Peri{{#if:|{{{apsis}}}|helion}} | data27 = 1.1964 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 = 2.6397 AU | label33 = Template:Longitem | data33 = | label34 = Eccentricity | data34 = 0.5468 | label35 = Template:Longitem | data35 = 4.29 yr (1,567 days) | label36 = Template:Longitem | data36 = | label37 = Template:Longitem | data37 = | label38 = Template:Longitem | data38 = 270.46° | label39 = Template:Longitem | data39 = Template:Deg2DMS / day | label40 = Inclination | data40 = 11.574° | label41 = Template:Longitem | data41 = | label42 = Template:Longitem | data42 = 183.92° | label43 = Template:Longitem | data43 = | label44 = Template:Longitem | data44 = | label45 = Template:Longitem | data45 = 156.12° | 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 = 0.2030 AUTemplate:·79.1 LD | 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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0.15 Template:Small<ref name="NEO-properties"/>
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| header110 = Atmosphere

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719 Albert, provisional designation Template:Mp, is a stony asteroid, approximately 2.5 kilometers in diameter, classified as a near-Earth object of the Amor group of asteroids. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 3 October 1911,<ref name="MPC-object"/> and subsequently a lost minor planet for 89 years. The asteroid was named in memory of Albert Salomon Anselm von Rothschild, an Austrian philanthropist and banker.<ref name="springer"/> Albert was the second Amor asteroid discovered, the first being 433 Eros.

Orbit and classification

Albert orbits the Sun at a distance of 1.2–4.1 AU once every 4 years and 3 months (1,567 days). Its orbit has an eccentricity of 0.55 and an inclination of 12° with respect to the ecliptic.<ref name="jpldata"/> The asteroid's first observation is a precovery taken in September 1911 at Heidelberg Observatory, two weeks prior to its discovery at Vienna. The body's observation arc begins the night following its official discovery observation.<ref name="MPC-object"/> Albert is also a Mars-crossing asteroid.

Close approaches

The asteroid has a minimum orbital intersection distance with Earth of Template:Convert, which translates into 79.1 lunar distances.<ref name="jpldata"/> On 8 September 1911, shortly before its discovery, it made its closest approach at Template:Convert. After another close encounter in 1941, Albert will not approach Earth to a similar distance until 2078.<ref name="jpldata"/>

Discovery

Discovered in 1911 by Johann Palisa, Albert was named after one of the Imperial Observatory in Vienna's major benefactors, Albert Salomon von Rothschild, who had died some months before.<ref name=science-news/> Due to inaccuracies in the asteroid's computed orbit it was subsequently lost and not recovered until 2000 by Jeffrey Larsen using data from the Spacewatch asteroid survey project.<ref name=science-news/> Prior to being recovered in 2000, Albert was the last "lost asteroid" among those assigned numbers (69230 Hermes was not numbered until 2003). The second-last "lost" numbered asteroid, 878 Mildred, had been recovered in 1991.<ref name=science-news/>

When it was rediscovered, Albert was mistakenly thought to be a new asteroid and was designated Template:Mp.<ref>Template:Cite report</ref> Upon further investigation, however, it was noticed that its orbital plane matched up nicely with the last remaining "lost" asteroid and it was properly identified. Using the new observational data, the period was determined to be about 4.28 years instead of the 4.1 years calculated in 1911; this discrepancy was the primary reason the asteroid was lost.<ref name=science-news/>

...asteroids were sometimes assigned numbers before accurate orbital elements had been determined, and so some numbered asteroids could not later be located. These objects were referred to as "lost" asteroids. The final lost numbered asteroid, (719) Albert, was recovered in 2000 after a lapse of 89 years. Many newly discovered asteroids still become "lost" ...{{#if:|

|}}{{#if: Encyclopædia Britannica<ref>{{#invoke:citation/CS1|citation

|CitationClass=web }}</ref>|

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Physical properties

In the SMASS classification, Albert is a common stony S-type asteroid.<ref name="jpldata"/> Others also characterized it as a stony asteroid,<ref name="Binzel-2004"/><ref name="Dandy-2003"/> while a study using Sloan photometry considers it to be an X-type asteroid.<ref name="Carry-2016"/>

Most of what is known about 719 Albert comes from observations taken after its rediscovery. In 2001 it passed near the Earth, allowing for a series of observations at differing phase angles. During this pass its rotational period was calculated at 5.802 hours and a measured absolute magnitude of 15.43 together with an assumed albedo of 0.12 gave a diameter of 2.8 km.<ref name="Krugly-2002b"/> Another group led by R. P. Binzel measured an absolute magnitude of 15.8; they, however, used an assumed albedo of 0.15 leading to a calculated diameter of 2.4 km.<ref name="NEO-properties"/>

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 2.36 kilometers based on an absolute magnitude of 15.5.<ref name="lcdb"/>

Notes

Template:Notelist

References

Template:Reflist

External links

Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
(719) Albert at EARN data base
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:ESA-SSA
Template:JPL small body

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

719 Albert

Contents

Orbit and classification

Close approaches

Discovery

Physical properties

Notes

References

External links

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719 Albert

Orbit and classification

Close approaches

Discovery

Physical properties

Notes

References

External links

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