The image shows ISS in some detail.The main P6 array can been seen , together
with the Zvezda and Zarya solar panels.In addition one of the truss radiators is
This five frame animation is in real time and demonstrates just how quickly
the station passed through the field of view !
Calculations courtesy of CalSky.com....see below for link.
ISS Solar Transit
June 16 2003
Location Crosby . Lancashire .UK
June 16 2003 , just over a week after capturing ISS crossing the Moon I
realised that within a couple of days I would have the chance to see the station
making a solar transit, from my home location on the Wirral.
However , the weather here in England is closing in , with rain and cloud
forecast mid week.
So , checking CalSKY.com I found that today , June 16 , there would be a
transit visible 14 km north of me.A quick check on the map and a few
calculations later I had the target area confirmed.....right in the middle of
the West Lancashire golf course ...... Oh dear !....... FORE!
Fortunately , when I phoned the secretary of the club he was very
understanding , although obviously I couldn't trek across the greens and
fairways , I was welcome to use the car park , if that was close enough to the
centre line . "That'll do for me I thought ".
At the allotted time 1415 gmt , I was all set up , having checked my position
in the club car park to GPS co-ordinates. The sky was clear , the only danger
being a rogue incoming missile in the form of a golf ball.... or two !
With car park security looking on , ISS made her appearance , crisp and clear
..... straight down the middle....... Hole in One !
In all the round trip was about 40 miles ,on one of the hottest days so far
this year , but it was well worth the effort.
Thanks again to Arnold Barmettler's CalSKY programme
....... to the crew of ISS for their brilliant pass , and of course to West
Lancashire Golf Club , for allowing me to do a bit of target practice in their
car park :o)
Now the "techie" bit......
This is how CalsSKY predicted the pass.
Here's how it turned out.
In a couple of frames the shape of the station is quite distinct with the P6
array visible and the main components.In addition in one frame I think you can
just make out one of the truss radiators.
The station is in LVLH mode.
Here's the data from CalSKY:
15h15m17.9s ISS Crosses the disk of Sun.
Velocity:48.7'/s. Transit duration: 0.54s
Angular diameter: 9.3" cylindrical,
20.0m x 10.0m
Direction towards center line: 1.44km, az: 14.9d NNE az: 229.7d SW
h: 52.2 dist: 497.4km mag=12.6m
Equipment check list
Meade LX90 8 inch telescope / 25mm Eyepiece projection.
Philips ToUcam webcam at 1/1000 th sec 10 frames per second
Toshiba satellite laptop
ISS Lunar Transit and daylight capture
June 8 2003
Location Wirral UK
A Lunar transit by low earth orbit satellite is not that unusual...it happens
quite often , but rarely is the event seen or indeed , captured on video. On
June 8 2003 I was aware that the International Space Station would transit the
Moon , as seen from my location.( red dot on aerial image above ) Using predictions calculated by Arnold
Barmettler's CalSKY programme
and confirmed by Tom Fly I crossed my fingers for good weather and spent a
couple of hours preparing my Meade LX90 telescope , fitted with Philips ToUcam
There was no margin for error !
The event would take less than a second from start to finish....exposure had
to be just right and , of course the clouds had to stay away !
This is how CalSKY.com predicted the path of ISS.It would be visible within a
narrow corridor stretching across the UK.
18h41m19.9s ISS Crosses the disk of Moon. Separation:0.01d
Angular Velocity:42.1'/s. Transit duration: 0.76s
Angular diameter: 7.7" cylindrical, 20.0m x 10.0m
Direction towards center line: 0.09km, az:201.9d SSW
az: 170.4d S h: 39.9 dist: 596.0km mag=-0.8m
With my wife Sue giving time checks in the run up , and son Andrew manning a
second web camera fitted to a 200mm zoom lens we waited.
At 18h41m gmt we started the cameras.
At 18h41m-19secs gmt this is what appeared !
Not only did we catch ISS transitting the Moon , but also a rare glimpse of
the station in daylight , travelling at around 17,000 mph at a range of 600km.
A fantastic sight !
Transit prediction courtesy CalSKY.com , all other images Copyright John
My thanks to Tom Fly and Arnold Barmettler
If you have any questions about how to plan for and capture transits , please feel free to contact me :email@example.com
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