Poor Lunar and Planetary Accuracy

It is not unheard of for a go-to telescope to place deep sky objects and stars dead center in the eyepiece field of view but "miss" the Moon and planets. Most computerized telescopes have trouble locating the Moon due to the complicated calculations involved in figuring out Luna's rather eccentric path across the stars. Planets also move across the starry firmament, but their paths are slower and more regular. If the telescope has a hard time with planets, the reason is usually poor time/date/location data. Neither time or latitude and longitude entries have to be exact to the second or even minute, but if these things are off by hours or degrees, the planets and Moon may be missed. The CAT has to know when and where to land on a planet, especially the relatively rapidly moving inner planets. If the Moon or a planet is always off 15°, check daylight savings time on/off status. Stars and planets move across the sky at the sidereal rate of 15° per hour (the Moon's speed is only a little different). If a planet is off 15°, th'at usually means time is off by 1 hour, either because of wrong daylight savings time status or a wrong time zone entry.

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