Explanation of Symbols used in Meteor Activity Table


Approx.
Start 
Date
Approx.
End
Date
Predicted 
Maximum

at Max
R.A.
h      m
Decl.
Degrees
ZHR
v
km/s
h
km
Apr 24
May 20
May 5d 6h
45.5º
22      20
+0.9º
-1º
+0.4º
60
Halley
66.8
118
98
Date
in UT
Date
in UT
Date when
the shower
is expected
to peak
(in UT)
Solar
Long
at time
of max
Radiant
position
in Right
Ascension
and, below,
drift per day
Radiant
position in
Declination
and, below,
drift per day
Zenithal
Hourly
Rate
in
meteors
per hour
Parent
body
Entry
velocity
Upper
and lower
heights at
which the
meteors
usually
appear

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