Altair IV
Altair IV was the inhabited fourth planet of the Altair system. This system was located in Sector 9, a region of space in the Alpha Quadrant. It was a Federation planet. (; , okudagram; ) 

In 2285, in the Genesis cave, a Federation cargo container was labeled with the name of this planet. ()

In the 2340s, on stardate 22991.6, Lieutenant Darien Wallace was born on Altair IV. This lieutenant's personnel file appeared in a hallucination of Deanna Troi's. (, okudagram)

In 2371, Dr. Henri Roget, of the Central Hospital of Altair IV, was awarded the prestigious Carrington Award for his work in the field of medicine. ()

Appendices

Background information 
This planet's quadrant of origin is inferred based on the position of its star system as seen in the star chart appearing in the  episode . The sector where this system was located was mentioned in the  episode .

"AL-tair" was the pronunciation for this planet's name from the script pronunciation guide for . 

Altair IV was referred to in the first draft script of , which established it as the place of origin of Altair water. The script also referred to it as "far away" from Earth.

The  noted that planet Altair IV was also the setting for the 1956 science fiction film .

In Gene Roddenberry and D.C. Fontana's final draft  of the  first season episode , this planet was visited by the . This was changed to Altair III for the aired episode.

Apocrypha 
In the novel Beneath the Raptor's Wing, an Earth colony had been settled on Altair IV, and narrowly avoided destruction by Romulan weapons.

External link 
 

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Altair 04