On New Year’s Eve, the planet Neptune will appear 0.1 degrees north of the planet Mars. While Mars is visible to the unaided eye, you will need binoculars or a telescope to spot Neptune. The best time to observe them is as soon as the sky is completely dark, when they will appear highest in the sky. On December 31, that will happen a few minutes before 7:00 p.m. If the sky is clear, look for Mars in the southwest about 30 degrees above the horizon.
Neptune will appear just above and to the left of Mars in binoculars. Use the finder chart below to help identify it. If you are using a telescope, it is important to know that many astronomical telescopes produce an image that is up-side down. If that is true for your telescope, Neptune will appear below and to the right of Mars.