| Abbreviation | ALPO |
|---|---|
| Formation | 1947 |
| Legal status | Non-profit organization |
| Purpose | Solar System astronomy |
| Location |
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Region served | Global |
Executive Director | Julius L. Benton Jr. |
| Website | ALPO |
| Remarks | Walter H. Haas (Founder & Director Emeritus) |
TheAssociation of Lunar and Planetary Observers (ALPO orA.L.P.O.) is an international scientific and educational organization established in March 1947 in the United States byWalter H. Haas, and later incorporated in 1990. ALPO is an organization for advancing and conducting astronomical work by both professional andamateur astronomers who share an interest inSolar System observations.[1] It is currently headquartered inSpringfield, Illinois.
ALPO studies Solar System objects such as theSun, the Earth'sMoon,planets,asteroids,meteors, andcomets. ALPO stimulates, coordinates, and generally promotes the study of these bodies using methods and instruments available within the communities of both amateur and professional astronomers. The organization holds a conference each summer, usually in conjunction with other astronomical groups.
ALPO had no initial formal structure but later found it necessary to specialize as its membership chose to narrow their studies to certain favored observed celestial objects. ALPO adopted a similar structure with sections like that of theBritish Astronomical Association (BAA) in order to properly study the objects observed. ALPO established interest sections as needed, such as the Saturn Section. Each section would be directed by an individual known as a "recorder", which later became known as "coordinator" (a term still used today). Julius L. Benton still serves to the present day as the first coordinator of the ALPO Saturn Section since its founding in 1971.[2] One of its most active sections over the decades has been its Lunar Section which would record, extensively draw, and record features on the Earth's Moon, includingtransient lunar phenomenon (TLP) [also known as lunar transient phenomenon (LTP)].[3] ALPO's "Lunar Recorder" for 1957-1961 was Alika K. Herring, an individual whose drawings oflunar craters would appear several times in the astronomical magazineSky & Telescope.[4] Herring would help determineastronomical seeing conditions inHawaii in conjunction with observations taken byFranklin E. Roach (not ALPO affiliated) that would eventually determine the establishments of various telescope facilities.
The 19 various sections fall into two main categories: observing, and special. Many of these sections participate with onlinediscussion boards subgroups contained inYahoo! Groups on theinternet.
Fourteen sections specialize as "Observing Sections". Moving outward from the Sun, they are by object (12): Solar,Mercury,Venus,Meteorite, Meteors, Lunar,Mars,Minor Planets,Jupiter, Saturn, Remote Planets, and Comets. By additional phenomena (2) they are:Eclipse, andTransit.
Five sections serve functionally as "Special Sections", fulfillinghistorical andadministrative purposes. They are, alphabetically: Computing, Historical,Publications,Training Program, andYouth Programs.
ALPO publishes a quarterly periodical,The Strolling Astronomer - The Journal of the Association of Lunar and Planetary Observers (ISSN 0039-2502,OCLC 1766616) since 1947, referred to by abbreviation as both StAst and JALPO. It has published other material on specialized subjects likeSaturn,[5] sometimes later becoming a major publication of note through a major publisher.[6] ALPO also occasionally issues small works on either astronomical topics or their conference proceedings in itsALPO Monographs series.
In context, the journal StAst-JALPO was started by its founder Haas in order to provide an archive and formal scholarly study of objects where no existing journal would adequately address publication needs or access. The journal establishment was similar to the starting ofThe Astrophysical Journal andThe Astronomical Journal byGeorge Ellery Hale. ALPO's journal filled a void in planetary science for over a decade prior to the founding of the journalIcarus byCarl Sagan in 1962.
The Minor Planets section of ALPO publishesThe Minor Planet Bulletin.
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