ISS crosses Moon 6/15/2006 5:56am from SLC (???)
Patrick, Could you confirm this possible ISS cross of the Moon on June 15 at 5:56am local time for me? Thanks. Data is from Calcsky - Canopus56 5h56m55.97s ISS Crosses the disk of Moon. Separation=0.138 Position Angle=329.0 Angular Velocity=30.9'/s. Transit duration=0.90s Angular diameter=23.1" size=73.0m x 44.5m x 27.5m Satellite at Azimuth=209.3 SSW Altitude= 22.8 Distance=801.8 km Magnitude=-0.5mag Satellite apparently moves to clock-face direction 8:45 o'clock Centerline, Closest Point ¨Map: Longitude=111ÂÂ50'27" W Latitude=+40ÂÂ47'00" Distance=4.80 km Azimuth= 48.6 NE Path direction: 138.6 SE ground speed: 7.615 km/s width: 19.1 km max. duration: 1.1 s __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
22.8 degrees elevation is pretty low. Since the lower it is the further (and smaller) it is I typically don't observe anything lower that 50 or 60 degrees. I usually try to position myself on the centerline but the report notes that you are only 4.8 km from the centerline of a path that's 19.1 km wide so if the prediction is correct you _might_ see it (again, it's a bit low in the sky for my taste). Good luck, Patrick Canopus56 wrote:
Patrick,
Could you confirm this possible ISS cross of the Moon on June 15 at 5:56am local time for me? Thanks. Data is from Calcsky - Canopus56
5h56m55.97s ISS Crosses the disk of Moon. Separation=0.138 Position Angle=329.0 Angular Velocity=30.9'/s. Transit duration=0.90s Angular diameter=23.1" size=73.0m x 44.5m x 27.5m Satellite at Azimuth=209.3 SSW Altitude= 22.8 Distance=801.8 km Magnitude=-0.5mag Satellite apparently moves to clock-face direction 8:45 o'clock Centerline, Closest Point ¨Map: Longitude=11150'27" W Latitude=+4047'00" Distance=4.80 km Azimuth= 48.6 NE Path direction: 138.6 SE ground speed: 7.615 km/s width: 19.1 km max. duration: 1.1 s
I forgot to mention that the 15th is still a ways off and the prediction is almost certain to change. So probably best to wait for the predictions that come out in the few days leading up to the 15th before making any firm plans. Patrick
--- Patrick Wiggins <paw@wirelessbeehive.com> wrote:
So probably best to wait for the predictions that come out in the few days leading up to the 15th before making any firm plans.
Thanks, Patrick. I'll mark my calendar.
22.8 degrees elevation is pretty low. . . . I typically don't observe anything lower that 50 or 60 degrees.
"Low" and "Lunar" unfortunately go together at this time of the year. See chart SLC Lunar Altitudes for 1 year: http://members.csolutions.net/fisherka/astronote/plan/Moon_Annual_Cycle.jpg On June 11th, the Moon will transit at its lowest declination for the year, -28 degrees. - Canopus56 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
The following just showed up from the other source I use for ISS transits and it agrees nicely with the data Kurt posted earlier. It's still a little low for my liking which puts it a bit more than twice as far away as when it's overhead (currently about 340 km) but as Kurt noted that's just the way it is for lunar transits this time of year. Note that column A refers to the travel distance from SPOC so if you're anywhere else, just ignore that column and plan any observations based on G and H. Patrick A - travel distance (kilometers) and direction B - date C - time (hhmmss) D - elevation angle of the ISS E - azimuth angle of the ISS ( + is East from North; - is W from N) F - range (kilometers) G - latitude for observing the transit H - longitude I - elevation above Mean Sea Level (meters) J - how far (kilometers) can I be from the centerline? (i.e., angular error = 0.25°) For other than solar transits: K - lunar transits: is space station sunlit? planetary encounters: 1=Mercury; 2=Venus; 4=Mars; 5=Jupiter; 6=Saturn L - sun elevation angle M - sun/moon or sun/planet separation angle A------- B----- C----- D--- E----- F--- G------- H-------- I--- J---- K L---- M---- 47.5 S 9 Jun 061543 1.6 60.7 2009 40.2259 -112.4502 1657 115.9 57.9 E 9 Jun 061544 2.1 61.1 1952 40.5200 -111.6323 2809 19.2 49.1 N 15 Jun 065650 22.5 -151.1 810 41.0744 -112.2280 1282 9.2 y 9.3 130.3 44.4 N 15 Jun 065651 22.5 -151.0 810 41.0235 -112.1675 1265 9.2 y 9.3 130.3 40.7 NE 15 Jun 065652 22.6 -150.9 808 40.9723 -112.1074 1265 9.2 y 9.3 130.3 38.1 NE 15 Jun 065653 22.6 -150.8 808 40.9210 -112.0474 1265 9.2 y 9.3 130.3 36.9 NE 15 Jun 065654 22.6 -150.8 808 40.8694 -111.9878 1286 9.0 y 9.4 130.3 37.3 NE 15 Jun 065655 22.6 -150.7 806 40.8181 -111.9279 1286 9.0 y 9.4 130.3 39.1 E 15 Jun 065656 22.7 -150.6 806 40.7652 -111.8696 1360 9.0 y 9.4 130.3 41.8 E 15 Jun 065657 22.7 -150.6 806 40.7094 -111.8132 1603 9.0 y 9.4 130.3 45.2 E 15 Jun 065658 22.7 -150.5 805 40.6424 -111.7652 2440 9.0 y 9.5 130.3
--- Patrick Wiggins <paw@wirelessbeehive.com> wrote: <snip>
49.1 N 15 Jun 065650 22.5 -151.1 810 41.0744 -112.2280 1282 9.2
Looks like I am off an hour on the time offset. - C __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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