# Re: Standard magnitude

From: Jonathan T Wojack (tlj18@juno.com)
Date: Thu Dec 21 2000 - 10:31:41 PST

• Next message: Matson, Robert: "RE: Standard magnitude"

```> For example, let's say a new satellite is observed at magnitude
> +5.0 at precisely 1000-km slant range (to remove range from
> the equation), and 75% "illumination", which I take to mean
> a sun-satellite-observer angle of 45 degrees.  What is this
> satellite's standard magnitude?  (The correct answer is +5.94).

According to the formula

A - 15.75 + 2.5 x log (BxB/C),

where A = the Standard magnitude,

where B = the range in kilometers, and

where C = the satellite illumination,

If I input 5.94 for A, 1000km for B, and 75% for C, I get +5.50.

Conclusions?

------------------------------
Jonathan T. Wojack                 tlj18@juno.com
39d45'N   75d33'W

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