The Sun was in Gemini. The Sun was totally opposite to Gemini. Gemini was at Zenith. This means when you were born, the Sun was in Gemini. About one hour.
All occultations are equal in duration.
Most references mention it is about one hour, but this is not accurate. And this effect will be the largest when the Moon is at transit, while it will be the minimum when the Moon is rising or setting. The Moon is at apogee, that means it is the slowest. Although its diameter will be the least at apogee, but the effect of the velocity's change between the perigee and apogee is larger than the effect of the diameter's change. The Moon at the transit.