I was smoking in my back yard looking to the south where i could see the moon, jupiter and saturn grouped together in the sky. i often do this. ontario international airport is south-east from my house. the light that i saw was bright blue in color, shot straight up and came to an abrupt stop- no deceleration. it was hovering in place drifting a little to the east and west... my dad was in the office on the computer and i ran to knock on the window to get his attention then rushed back out to continue watching it. he didn't come out so i did it again then to continued to observe the light. it did not blink or pulsate. it looked about the distance of ontario airport but west of it. the total duration was probably about 5 minutes and occurred somewhere between 8:15 and 8:25 pm. the light then descended in the nearly identical path of flight it took to ascend. i was in the navy for 10 years- an airdale. i know what different aircraft look like, sound like and how they behave. this was nothing i have ever seen. it was not a shooting star, it was not a drone, and it was not a firework. there was no sound, and there was no trail. i am sorry that i do not have video- really wish i did. i was hoping someone else saw it too.