The trajectory was at first very shallow but seemed to dip from my perspective. (On a side not I am a science teacher and would love to know what it was so I can share with my students!)
Location
Address
Upper Farringdon, England (GB)
Latitude
51° 7' 51.21'' N (51.130893°)
Longitude
0° 59' 39.4'' W (-0.994279°)
Elevation
120.251961m
Time and Duration
Local Date & Time
2017-12-31 17:32 GMT
UT Date & Time
2017-12-31 17:32 UT
Duration
≈1.5s
Direction
Moving direction
From up right to down left
Descent Angle
247°
Moving
Facing azimuth
10°
First azimuth
15°
First elevation
40°
Last azimuth
5°
Last elevation
38°
Brightness and color
Stellar Magnitude
-12
Color
Light Green
Concurrent Sound
Observation
Unknown
Remarks
-
Delayed Sound
Observation
Unknown
Remarks
-
Persistent train
Observation
Yes
Duration
2s
Length
-
Remarks
There was a glow which followed the object with two clear and distinctive luminosities.