I searched for today's lunar eclipse data in Wolfram Alpha. That gave me this result: ![enter image description here](https://community.wolfram.com//c/portal/getImageAttachment?filename=IMG_20200605_211925.jpg&userId=1995991)
In their sources section they have Given some sources. One of them is: https://eclipse.gsfc.nasa.gov/eclipse.html ![enter image description here](https://community.wolfram.com//c/portal/getImageAttachment?filename=IMG_20200605_215456.jpg&userId=1995991)
My Question is Why the data umbral magnitude, penumbral magnitude are different ?Wolfram Alpha's source is Nasa gsfc site so why not same as NASA's data . I know that there is a little difference between those data but why not same as NASA's data ? I don't know much about this stuff so if i am missing anything let me know. Thanks :D