Answer: canisminor

AnswerCrossword Clue
CANISMINOR

Neighbor of Gemini and Hydra

CANISMINOR

Procyon's constellation

CANISMINOR

Where Procyon is

CANISMINOR
"Smaller dog" constellation
CANISMINOR
Orion's neighbor
CANISMINORCelestial pooch
CANISMINORSky underdog?