Canon Powershot SX50 HS contrail spotting

A few months ago I bought a Canon Powershot SX50 HS. My pictures almost always turn out blurry and I hold my camera steady. I usually contrail spot from my backyard with the fastest shutter speed on my camera. Here are some sample images that I have attached. How do I improve my image quality? The pictures at the bottom are a Sun Country Boeing 737-700 and a Frontier Airbus A319.

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British Airways Boeing 747-436

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Korean Airlines Airbus A380-861

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FedEx Airbus A310

Attached Images

• IMG_1450.jpg (215.0 KB)
• IMG_1160.jpg (85.5 KB)
• IMG_1175.jpg (125.6 KB)
• IMG_1141.jpg (200.7 KB)
• IMG_1091.jpg (109.5 KB)