First planets

From Memory Alpha, the free Star Trek reference

The following is a list of the first planet in each of their respective star systems.

• Alpha Majoris I
• Angel I
• Bajor I
• Beth Delta I
• Castal I
• Doraf I
• Kabrel I
• Korris I
• L-374 I
• Meldrar I
• Mercury (Sol I)
• Orion I
• Sarpeidon (Beta Niobe I)
• T'Lani Prime (T'Lani I)
• Terra 10 (Cepheus I)
• Totoro (Braslota I)
• Valo I
• Veridian I

Planet ordinals
Prime • I • II • III • IV • V • VI • VII • VIII • IX • X • XII • XIV • XX