- This topic is empty.
September 24, 2017 at 10:45 am #9264AnonymousGuest
Wednesday 27 September 2017
Appears 20h07m07s 0.2mag az:207.0° SSW horizon
Culmination 20h11m54s -2.4mag az:142.9° SE h:17.7°
distance: 1090.8km height above Earth: 410.2km elevation of Sun: -11°
Disappears 20h12m52s -2.4mag az:120.6° ESE h:15.8°
Thursday 28 September 2017
Appears 20h50m39s 0.7mag az:235.1° SW horizon
Disappears 20h55m47s -3.7mag az:162.5° SSE h:42.9°
Friday 29 September 2017 ADDED ENTRY!
Appears 19h58m47s 0.8mag az:224.0° SW horizon
Culmination 20h03m55s -3.1mag az:150.3° SSE h:30.0°
distance: 757.8km height above Earth: 410.7km elevation of Sun: -10°
Disappears 20h05m55s -2.5mag az: 97.1° E h:16.4°
Saturday 30 September 2017 ADDED ENTRY!
Appears 19h07m05s 0.7mag az:211.8° SSW horizon
Culmination 19h11m58s -2.5mag az:144.9° SE h:20.5°
distance: 991.1km height above Earth: 409.8km elevation of Sun: -3°
Disappears 19h15m56s -1.3mag az: 83.0° E h:3.8°
Appears 20h42m44s 1.3mag az:248.6° WSW horizon
Culmination 20h48m04s -4.2mag az:163.8° SSE h:65.9°
distance: 448.4km height above Earth: 411.7km elevation of Sun: -17°
Disappears 20h48m36s -4.1mag az:112.0° ESE h:53.8°
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.
- You must be logged in to reply to this topic.