Air taxi captain reported ATC question an early turn on departure from sjc.

Attributes
ACN	1579756
Time
Date	201809
Local Time Of Day	0001-0600
Place
Locale Reference	SJC.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Light Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 135
Flight Phase	Climb
Route In Use	SID SJC2.MOONY
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Narrative:

Took off out of sjc 30L on the SJC2 departure as filed; SJC2-moony-sjc. Everything normal until before reaching moony; the plane appeared to do a smart turn towards sjc; controller said appeared to be 20 miles before the fix. We asked if we needed to turn back; he said no; just give a good rate to 12000 feet. We were already at 11000 feet.appeared the next leg activated early and we didn't catch it until ATC asked us why we were turning early. I guess it felt normal because we had done the loupe departure which turns at a similar time.

Original NASA ASRS Text

Title: Air taxi Captain reported ATC question an early turn on departure from SJC.

Narrative: Took off out of SJC 30L on the SJC2 Departure as filed; SJC2-MOONY-SJC. Everything normal until before reaching MOONY; the plane appeared to do a smart turn towards SJC; Controller said appeared to be 20 miles before the fix. We asked if we needed to turn back; he said no; just give a good rate to 12000 feet. We were already at 11000 feet.Appeared the next leg activated early and we didn't catch it until ATC asked us why we were turning early. I guess it felt normal because we had done the LOUPE Departure which turns at a similar time.

Data retrieved from NASA's ASRS site 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.