# What are the correct symbols for vernal and autumnal equinox?

What are the correct symbols for vernal and autumnal equinox?

I have seen people use both ♈︎ (\Aries) and $$\gamma$$ (\gamma) to denote vernal equinox. However, I have never seen the symbol for autumnal equinox. Should it be either ♎︎ (\Libra) or $$\Omega$$ (\Omega)?

Are ♈︎ and ♎︎ the conventional symbols to use?

Are $$\gamma$$ and $$\Omega$$ sometimes used just because they resemble the above symbols?

An alternative name for vernal equinox is First Point of Aries. Is there a similar name (First Point of Libra) for autumnal equinox?

$$\gamma$$ is a poor substitute but clear enough if ♈ is unavailable. Since $$\Omega$$ stands for an orbit's longitude of ascending node (angle ♈-☉-☊), it would be a confusing substitute for ♎.