Neptune Finder Map

DateR.A.Dec.Mag.SizePhaseDist.
Dec 0122h36m-09°39′+7.92.4″100%29.976
Dec 1522h36m-09°35′+7.92.4″100%30.215
Dec 3122h38m-09°28′+7.92.4″100%30.467

The table gives the planet’s equatorial coordinates – right ascension (R.A.) and declination (Dec.) – at 01:00 Universal Time on selected dates. Next are listed the visual magnitude and equatorial diameter. Last are the percentage of the planet’s disk illumination by the Sun and the distance from the Earth in astronomical units. One a.u. equals 92,955,807 miles or 149,597,870 kilometers.