I initially saw out of my periphery while walking my dog and immediately turned due W to see the magnificent display. I have witnessed what I thought to be a comet once before but this was much brighter with a spectacular red/green tail. I can only replay in my mind's eye and it was a once in a lifetime experience. Glad I found this site. Hope I'm not the only one who was fortunate enough to witness it.
Location
Address
Scottsdale, AZ
Latitude
33° 42' 44.73'' N (33.712425°)
Longitude
111° 55' 0.27'' W (-111.916743°)
Elevation
601.593m
Time and Duration
Local Date & Time
2017-04-10 21:10 MST
UT Date & Time
2017-04-11 04:10 UT
Duration
≈3.5s
Direction
Moving direction
From up left to down right
Descent Angle
126°
Moving
Facing azimuth
311.25°
First azimuth
-
First elevation
65°
Last azimuth
275.3°
Last elevation
11°
Brightness and color
Stellar Magnitude
-16
Color
Primarily red and green it also may have had some bright blue. Spectacular