CE560XL first officer reported the nose gear failed to retract after takeoff.

Attributes
ACN	1042530
Time
Date	201210
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	Citation Excel (C560XL)
Flight Phase	Initial Climb
Component
Aircraft Component	Nose Gear
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

After takeoff; we attempted to retract the gear. Upon gear retraction; the main gear lights extinguished; but the nose gear remained down and locked with a green light indication. The gear handle was placed back in the down position and we observed normal gear down indications for all gear. We diverted to a larger airport and executed a normal approach and landing.

Original NASA ASRS Text

Title: CE560XL First Officer reported the nose gear failed to retract after takeoff.

Narrative: After takeoff; we attempted to retract the gear. Upon gear retraction; the main gear lights extinguished; but the nose gear remained down and locked with a green light indication. The gear handle was placed back in the down position and we observed normal gear down indications for all gear. We diverted to a larger airport and executed a normal approach and landing.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.