SkyEye

About the Sky Charts

In each chart, the zenith (position directly over the observer) is located in the centre of the chart and all of the stars are projected from this point. As a result, objects near zenith are as they appear in the sky but objects nearer to the horizon circle are considerably more distorted. Since it is difficult if not impossible to observe things close to the horizon, it is hoped that this distortion will not cause undue problems.

The online charts are drawn in colour on a dark background. Coloured circles of varying radius are used to represent stars. The larger the circle, the brighter the star. Binary and multiple star systems that appear as a single object to the naked eye are represented by their combined magnitude. The colours represent the spectral types (surface temperatures) of the stars, with blue being the hottest and red the coolest.

A selection of other interesting naked-eye objects are drawn in green. Galaxies are represented by ellipses, nebulae are triangles, open clusters are squares and globular clusters are circles. The green lines represent the outlines of the constellations and the white cross at the centre marks the zenith.

To use the sky chart, turn it around until the direction you are facing is located at the bottom. The usable part of the chart ranges from the lower horizon circle to the zenith.

Star positions (epoch 2000), magnitudes and colours are taken from the Bright Star Catalogue, Fifth Revised Edition. The limiting stellar magnitude is +4.5 with a few fainter stars to fill out the constellation lines. The limiting magnitude for other objects is approximately +6.0.

Sky Charts

Twenty-four charts, twelve for each hemisphere, are available. The times across the top of the tables represent your local time. Subtract one hour from your local time if daylight savings time is in effect. Therefore, 1830 hours daylight savings time would be 1730 hours on the tables listed below. The months are listed vertically. The charts are approximately correct for the given local time during the middle of the selected month.

Northern Hemisphere : 45° North

Month/Time 1730 1930 2130 2330 0130 0330 0530
Jan Chart 1 Chart 3 Chart 5 Chart 7 Chart 9 Chart 11 Chart 13
Feb Chart 3 Chart 5 Chart 7 Chart 9 Chart 11 Chart 13 Chart 15
Mar Chart 5 Chart 7 Chart 9 Chart 11 Chart 13 Chart 15 Chart 17
Apr Chart 7 Chart 9 Chart 11 Chart 13 Chart 15 Chart 17 Chart 19
May Chart 9 Chart 11 Chart 13 Chart 15 Chart 17 Chart 19 Chart 21
Jun Chart 11 Chart 13 Chart 15 Chart 17 Chart 19 Chart 21 Chart 23
Jul Chart 13 Chart 15 Chart 17 Chart 19 Chart 21 Chart 23 Chart 1
Aug Chart 15 Chart 17 Chart 19 Chart 21 Chart 23 Chart 1 Chart 3
Sep Chart 17 Chart 19 Chart 21 Chart 23 Chart 1 Chart 3 Chart 5
Oct Chart 19 Chart 21 Chart 23 Chart 1 Chart 3 Chart 5 Chart 7
Nov Chart 21 Chart 23 Chart 1 Chart 3 Chart 5 Chart 7 Chart 9
Dec Chart 23 Chart 1 Chart 3 Chart 5 Chart 7 Chart 9 Chart 11

Southern Hemisphere : 30° South

Month/Time 1730 1930 2130 2330 0130 0330 0530
Jan Chart 1 Chart 3 Chart 5 Chart 7 Chart 9 Chart 11 Chart 13
Feb Chart 3 Chart 5 Chart 7 Chart 9 Chart 11 Chart 13 Chart 15
Mar Chart 5 Chart 7 Chart 9 Chart 11 Chart 13 Chart 15 Chart 17
Apr Chart 7 Chart 9 Chart 11 Chart 13 Chart 15 Chart 17 Chart 19
May Chart 9 Chart 11 Chart 13 Chart 15 Chart 17 Chart 19 Chart 21
Jun Chart 11 Chart 13 Chart 15 Chart 17 Chart 19 Chart 21 Chart 23
Jul Chart 13 Chart 15 Chart 17 Chart 19 Chart 21 Chart 23 Chart 1
Aug Chart 15 Chart 17 Chart 19 Chart 21 Chart 23 Chart 1 Chart 3
Sep Chart 17 Chart 19 Chart 21 Chart 23 Chart 1 Chart 3 Chart 5
Oct Chart 19 Chart 21 Chart 23 Chart 1 Chart 3 Chart 5 Chart 7
Nov Chart 21 Chart 23 Chart 1 Chart 3 Chart 5 Chart 7 Chart 9
Dec Chart 23 Chart 1 Chart 3 Chart 5 Chart 7 Chart 9 Chart 11