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February 4, 2018 at 2:32 pm #9421Anonymous
Wednesday 7 February
Appears 18h37m50s 2.5mag az:280.8° W horizon
Culmination 18h43m10s -3.8mag az:196.0° SSW h:66.1°
distance: 444.1km height above Earth: 408.6km elevation of Sun: -13°
Disappears 18h45m14s -2.7mag az:117.5° ESE h:20.5°
Thursday 8 February
Appears 17h45m40s 2.3mag az:277.6° W horizon
Culmination 17h51m02s -3.9mag az:190.2° S h:81.2°
distance: 413.2km height above Earth: 408.7km elevation of Sun: -5°
Disappears 17h55m25s -1.3mag az:102.8° ESE h:4.1°
Appears 19h22m09s 2.5mag az:283.1° WNW horizon
Culmination 19h27m17s -2.4mag az:209.5° SSW h:30.2°
distance: 750.6km height above Earth: 407.9km elevation of Sun: -20°
Disappears 19h28m06s -2.6mag az:180.2° S h:26.3°
The local time in 24-hour format at which the satellite is visible at its best. The satellite may be observable before this time. 0:00 or 0h00m is midnight, 12h is noon, 18h is 6 pm. The time zone is the one indicated on the left of the Earth icon on top of (almost) each page. Daylight saving is applied automatically.
Local time at which the satellite appears visually. The first figure indicates the visual brightness of the object. The smaller the number, the brighter and more eye-catching it appears to an observer. The units are astronomical magnitudes [m]. Azimuth is given in degrees counting from geographic north clockwise to the east direction. The three-character direction code is given as well. In case the satellite exits from the Earth shadow and comes into the glare of the Sun, the elevation above horizon is given in degrees for this event. If this figure is omitted, the satellite is visible straight from the horizon.
Time at which the satellite reaches his highest point in the sky as seen from the observer. For description of the figures see Appears.
Visually “better” passes of satellites are indicated by highlighting the information. The selection within the list of all possible transits is coupled with the observer level, the daylight, and several other conditions.
Time of the transit of the meridian, i.e. the satellite is due South or due North. At this time, the satellite will not reach its highest point of the pass. Look for culmination.
Local time of visual disappearance of the satellite. This may either be the time at which the satellite moves below the observer's horizon or the entry of the object in the shadow of Earth (the elevation is given for this event). The low Earth orbiting (LEO) satellites are usually visible for about 10 seconds more than the listed time, when they start fading rapidly.
The magnitude indicates the visual brightness of an object. The brightest star (Sirius) reaches -1.4m, whereas 6m is the limit of the unaided eye. Venus, the brightest planet, reaches -4m. The Moon at first quarter is -8m, about the same magnitude that the brightest Iridium flares can produce.
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