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

### Instruction:
Which Constellation has an Apparent magnitude larger that 7.7, and an NGC number of 7777

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

### Response:
SELECT Constellation FROM table WHERE Apparent magnitude > 7.7 AND NGC number = 7777