 Viking Orbiter 1 image with Mädler at bottom center. The outflow channel is clearly visible at the bottom (west). | |
| Planet | Mars |
|---|---|
| Region | Sinus Sabaeus quadrangle |
| Coordinates | 10°39′S2°46′E / 10.65°S 2.77°E /-10.65; 2.77 |
| Quadrangle | Sinus Sabaeus |
| Diameter | 124.16 km |
| Eponym | Johann Heinrich Mädler |
Mädler is acrater onMars. It was named in honor of the German astronomerJohann Heinrich Mädler by theIAU in 1973.[1]
Mädler and collaboratorWilhelm Beer produced the first reasonably good maps of Mars in the early 1830s. When doing so, they selected a particular feature for theprime meridian of their charts. Their choice was strengthened whenGiovanni Schiaparelli used the same location in 1877 for his more famous maps of Mars. The feature was later called Sinus Meridiani ("Middle Bay" or "Bay of the Meridian"), but following the landing of theNASA probeMER-BOpportunity in 2004 is perhaps better known asMeridiani Planum.
Mädler lies in the south ofMeridiani Planum, close to the prime meridian and about 10° east ofBeer.Schiaparelli is also in the region.
A valley-lake system calledMarkikh Vallis that once held water flowed into Mädler crater from the south, and formed a lake within Mädler and the adjacent, smaller crater to the southeast. The water flowed out of Mädler to the west and eventually to the northern plains.[2]
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