Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the average NGC number of everything with a Right ascension (J2000) of 05h33m30s?

### Inputs:
table_name: table, columns: ['NGC number', 'Object type', 'Constellation', 'Right ascension ( J2000 )', 'Declination ( J2000 )']

### Response:
SELECT AVG NGC number FROM table WHERE Right ascension ( J2000 ) = 05h33m30s