Ideas for an alien warship my astronauts can observe

I’m writing a sci fi novel where the first mission to another star system is hijacked by my astronauts, and they use the chance to observe an alien warship observe an alien warship. <br><br>So the alien warship is about 100 times the size of the ISS, and was clearly built to a human-scale. What does it look like? <br><br>So far I have:<br><br>* Small turrets have a moving part that bulges out of the side of the turret. <br>* Facing their home planet is an array of sensors that look like mylar tape. <br>* The mylar tape is on stalks that look like pencils. <br>* Facing deep space are the engines. <br>* It has a small-ish (maybe 50m long) fusion reactor that was clearly a human-scale fusion reactor that they bolted together to create the ship’s power source. <br>* The aliens are too small to see through the windows. <br>* The ship is painted with a single yellow stripe (like a kerning stripe) on one side. <br>* Some materials are reflective, and other materials are matte.<br>* Some panels are bolted on. Some are riveted. Some are clearly heat-welded. <br><br>What else?