The two or three numbers following the names of celebrities refer to the zodiac position of Sun, Moon and Ascendant. The 12 zodiac signs are associated with the following numbers: 1 Aries, 2 Taurus, 3 Gemini, 4 Cancer, 5 Leo, 6 Virgo, 7 Libra, 8 Scorpio, 9 Sagittarius; 10 Capricorn, 11 Aquarius, 12 Pisces.
The code puts together the number of the Sun’s sign followed by the number of the Moon’s sign and the Ascendant (when applicable) separated by a dot.
Hence, for Sun in Libra and Moon in Aries, and Ascendant in Scorpio, the reference is 7.1.8.
Other codes you may find with the trinity code are those related with conjunction (cjn) aspects between Saturn, Uranus, Neptune, Pluto and Sun, Moon, Ascendant (Asc), Medium Coeli (MC), Immum Coeili (IC).