Contains:  Solar system body or event
196 years later..., 



    
        

             Astroavani - Avani Soares

196 years later...

196 years later..., 



    
        

             Astroavani - Avani Soares

196 years later...

Technical card

Imaging telescopes or lenses: Celestron C14 EDGE HD

Imaging cameras: ZWO ASI 290MC

Mounts: CGE Pro

Software: Fire Capture  ·  AS!2  ·  Photofiltre - Irfan

Filters: Baader Planetariun IR Pass 685



Resolution: 3000x1585

Locations: Observatório Parsec, Canoas, Rio Grande do Sul, Brazil

Data source: Backyard

Description

Wilhelm Lohrmann 1824 Sinus Medii original chart and the February 1, 2020 register by the Brazilian selenographer Avaní Soares!
A nice comparison between early XIX century well drawn lunar features and details by Lohrmann and 200 years later, the expertise of Avaní and his incredible hi-res images!
This clearly shows the importance of lunar visual observation and sketching and high-resolution lunar photography!!!

An important point to observe on 1824 Lohrmann's charts are the gradual albedo markings, one of the interesting innovations at the time and certainly not an easy thing to accomplish, to properly measure and translate into a beautiful done engraving!

Some interesting features, in the 200 years old Lohrmann chart, are absent. For example, the Rimae Triesnecker structure on the left side of crater. Although some albedo difference was noted by Lohrmann that vaguely follow this rimae path. Certainly, other craters and details are missing. Why? Well, that is the fascinating aspect of comparing a 200-year-old chart with an actual hi-res photography! Perhaps the original Lohman’s telescope aperture was not enough to observe some details, perhaps he has not the visual acuity to observe them or the Sun inclination was not the best at the moment of the observations... Anyway, it’s amazing what a 200-year-old chart reveal!
Text and editing: Andrés de La Plaza

Comments

Histogram

196 years later..., 



    
        

             Astroavani - Avani Soares