Can you identify this space travel related equation?

Does anyone recognize the equation carved on this object?

The only hint I have is that the back side has the word "orbit" carved into it.

It may be incomplete or incorrectly copied.

My best interpretation in MathJax:

$$U_eR_o\sqrt{\frac{2g}{(R_ôh)}}$$

My grandmother carved the object. She had a hobby of carving small figures and objects out of blackboard chalk. She made (among other things) chess figures and a scene with her brother posing with his new car.

This figure was presumably carved during the space race in the 1960s.

Grandmother was a grade school teacher, so I'm pretty sure she didn't understand it and just copied it from a magazine or newspaper article.

• @Ludo: It looks more like Rôh to me.
– JRE
Oct 22, 2022 at 22:12
• I'm getting a whiff of escape velocity $v_e = \sqrt{2\mu/r}$ but that's obviously not all of it Oct 22, 2022 at 23:16
• I'm seeing that "g" as more of a greek small case rho ($\rho$ or ϱ from here). Looks a bit like this stuff which of course is related to escape velocity as well. We should use dimensional analysis here. Also, this depends on $R^{3/2}$ so look for things that have a 3/2 power law dependence. Sorry not much help.
– uhoh
Oct 23, 2022 at 3:30
• Note that it may be that the part starting with $R_0\sqrt{}\dots$ may actually be an exponent of $e$... all kinds of rocket related equations have exponential relations, that may give someone a clue. Why the $U$ that precedes that looks to be above the $e$ may just be another indication that it was copied without being fully understood...
– Amit
Jun 11 at 23:25
• Btw, this also makes it more likely a $\rho$ rather than a $g$, that is, charge density perhaps.
– Amit
Jun 12 at 21:17