Another ISS solar transit 25 April (Brisbane)

[Matt Wastell]

Hi all

After imaging my first ISS transit I have been doing homework and there is another one occurring on 25 April 2013, 8.43am, just out of Brisbane.
The centreline crosses suburbs like Kedron, Everton Hills, Bridgeman Downs, Bracken Ridge and Brighton (on the water and a great place as the Sun will be lowish)

You will have to keep checking calsky as the ISS adjusts its altitude and minor changes can make a big difference.

http://www.calsky.com/cs.cgi

Here is the cut info

Time (24-hour clock) Object (Link) Event
8h43m46.28s ISS Close to Sun. Separation=0.749° Position Angle=299.9°, Position angle vertex=73.0°
Angular diameter=35.8" size=109.0m x 73.0m x 27.5m
Satellite at Azimuth= 52.5° NE Altitude= 30.3° Distance=772.8 km
In a clock-face concept, the satellite will seem to move toward 6:34
Angular Velocity=19.8'/s

Centerline, closest point →Map: Longitude=152°56'52"E Latitude=-27°24'20" (WGS84) Distance=10.48 km Azimuth=313.9° NW Path direction= 44.0° NE ground speed=8.636 km/s width=12.3 km max. duration=1.6 s
Time uncertainty of about 31 seconds

[batema]

Would you be able to use a dedicated hydrogen alpha telescope to image this Matt?

[Matt Wastell]

Absolutely - here is my first attempt at a transit with the Lunt60.

[thunderchildobs]

How far from the plotted track can you be to still the transit?

Brendan

[Matt Wastell]

I think
width=12.3 km
That would be 6.15km either side of centre line.
If you get further from the centre line the transit crosses less disc - quicker transit.