ALPO Section Highlights

A Short Summary of CR 2227 March 2020 TLO available
Comet News for March, 2020 Meteor Outlook for week of 3/28/2020
Cassini Update November 2016 Observing Alert for the SEB
Favorable Mercury Apparition Mars 2020 Pre-Apparition report

ALPO Picture of the Month

Solar system images and drawings from ALPO members (Visit the Archive)

Even though we are in Solar minimum, our observers observe the Sun on a daily basis. Here a composite of images by Frank Melillo of some prominences around the Western limb of the Sun and a filament in the South. Congratulations Frank!
Visit the ALPO Solar Gallery for more images


February 23, 2020. New Addition to the ALPO Publications Section Monographs

Researchers who follow the Sun’s Carrington Rotations will be interested to know that a new monograph by ALPO Solar Section Assistant Coordinator Theo Ramakers has been uploaded to the online ALPO Monographs folder.

Titled Solar Activity from 2014 through 2016 with the subtitle An unorthodox analysis of solar activity during three years, on the way to solar minimum, this nine-page paper documents the research done to evaluate the relationship between the Wolf number indicator used to identify solar activity in many amateur solar reports and the size of the areas which Active Regions occupy during times of high solar energy.”

Quoting further from the paper’s Abstract: “The evaluation period covered only a portion of solar cycle 24 and coincided with the beginning of the down-trend of solar activity going from solar maximum to solar minimum (January 4, 2014 to January 4, 2017). Indicators for high solar activity used in the analysis were solar flares which would trigger an R2 alert from the Space Weather Prediction Center (SWPC) and which were equal to or exceeded the flux of an M5.0 flare, thus including the upper M-class and X-class flares. The analysis did focus on the rapid increase these measurements have during the time leading up to major solar flares. The analysis included the mapping of the data obtained for both indicators for the day of the flare, as well as the three days prior to the flare. The result indicated that Active Region Areas of active regions are much more inclined to a rapid increase than the Wolf number in days prior to the flare.”

To access these documents, go to, then click on the ALPO Section Galleries link near the top right corner of the screen. Next click on the Publications Section folder, then the ALPO Monographs folder. You’ll then have access to all of the monographs.

Ken Poshedly
Member of the Board, Assn of Lunar & Planetary Observers
Coordinator, ALPO Publications Section
Atlanta, Georgia USA

Minor Planet “31836 Poshedly”

Request for Eclipse observations and images

Eclipse observing reports are being accepted regarding the following:

Annular Solar Eclipse of December 26, 2019. Total annularity was visible in the Saudi Arabian Peninsula, southern India, Sumatra, Borneo, Philippines and Guam. A partial eclipse was visible in small parts of Eastern Europe, much of Asia, North/West Australia, East in Africa, Pacific and Indian Ocean.

Penumbral Lunar Eclipse of January 10, 2020 visible in Africa, Asia, Australia, Europe and Greenland.

Reports should include the following data:

We ask that all reports be sent as soon as possible and no later than February 1 to ALPO Eclipse Section Acting Coordinator Keith Spring at either and, or 2173 John Hart Circle, Orange Park, FL 32073.

All reports will be used as part of the next comprehensive eclipse report to be published in the ALPO quarterly journal in March of this year.

Keith Spring,
ALPO Eclipse Section Acting Coordinator

Notes About Lunar Domes Luther and Hall

Two lunar domes located near the craters Luther and Hall (which we termed Luth1 and Hall1), have been imaged and studied.

The morphometric characteristics of these domes have been examined by making use of a combined photoclinometry and shape from shading approach and Lunar Reconnaissance Orbiter (LRO) WAC images, including th LOLA DEM data set. A full spectral analysis based on Chandrayaan-1 Moon Mineralogy Mapper is in progress.

The ALPO Lunar Domes Studies Program encourages all to participate by submitting more high-resolution imagery of this wide lunar region so that we can have more data to identify further lunar domes not yet characterized in the morphometric and spectral properties.

The preliminary report can be found at

Raffaello Lena
Coordinator, ALPO Lunar Domes Studies Program

Expected Meteor Activity for November 30 – December 6, 2019

This post discusses the expected meteor activity and lunar conditions for the current week. It is focused on North American latitudes but may be used in all locations. Sky charts displaying current radiant positions are provided for early evening hours, midnight, and the hour prior to dawn. European readers may wish to use the charts in the same article at for better accuracy.

To access the meteor activity outlook click on: Meteor Activity Outlook for November 30- December 6, 2019

We welcome hourly reports on meteor activity at:

Reports of individual fireballs should be filled out at:

Meteor Activity Outlooks for observers in the southern hemisphere are available upon request at:

Clear Skies!
Robert Lunsford
Coordinator, ALPO Meteors Section

A Report on Carrington Rotations 2216 through 2220

ALPOSS Coordinator and Scientific Advisor Richard Hill continues his reports covering the analysis and the morphology of the activity of the Sun’s Carrington Rotations using the images and reports submitted to the Solar Section with a report on: CR2216 thru CR2222. This report covers the period from 2019-04-08 1911 UT, thru 2019-08-22 2136 UT, and is based on over 1332 image and observation submissions by numerous contributors The report was published in the 2020 Winter issue of the ALPO Journal, the Strolling Astronomer. Get an impression of this report by clicking the thumbnail below, and if you are interested, you can read the entire paper plus many more by becoming an ALPO member for the low price of $18.00 per year. Sign up. become a member, and support ALPO-Astronomy by clicking here.