The most likely cause is the very long 46-second exposure. The moon moves across the sky, so at that shutter speed it will blur or trail unless you use a tracking mount. With longer focal lengths, even much shorter exposures can show motion.

Other contributors can be reflections or flare from the lens system, especially if you have a UV/protective filter fitted. Bright night subjects often reveal ghosting from extra glass surfaces. Dust on the lens or sensor can also create artifacts, though flare/ghosting is more likely for bright moon shots.

What to try:

• Use a much shorter shutter speed for the moon.
• Lower ISO as needed and stop down if appropriate.
• Remove any clear/UV filter and compare results.
• Use a lens hood and make sure the front element is clean.
• Check for dust on the lens/sensor.
• If your lens has stabilization, let IS/VR settle before shooting; on a tripod, test with stabilization off if recommended by the lens maker.
• For long moon exposures without trailing, use a tracking mount.