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(meteorobs) June 16 Observations
-- [ From: Robert Lunsford * EMC.Ver #2.5.3 ] --
I watched for 4 hours 45 minutes from the Descanso Observatory this
morning primarily to watch for any activity from the June Lyrids or Xi
Draconids. The moon had not risen as I started at midnight and the sky
was nice and dark. Moonlight was first noticed some 30 minutes into the
session but the moon was not visible until an hour and 15 minutes into
the session thanks to a hill in the east. I was looking northward toward
the possible radiants and away from direct moonlight. A total of 24
meteors were seen during the session: 2 Sagittarids, 4 Xi Draconids
(with an average radiant at 275 (18:20) +54) and 24 sporadics. There was
one meteor that lined up with both the Xi Draconid and June Lyrid
radiant (278 (18:32) +35) but due to the short path length shower
association is more probable with the Xi Draconids. No other meteors
could have possibly been associated with the June Lyrids. The highlight
of the session was nice green -2 sporadic during the second hour that
occurred low in the north near Cassiopeia.
June 16, 1998
0700-0800 UT 0.95 6.54 1 SAG 1 XDR 4 SPO 6 TOTAL
0800-0900 UT 0.95 6.34 1 XDR 8 SPO 9 TOTAL
0900-1000 UT 0.98 6.01 1 SAG 1 XDR 2 SPO 4 TOTAL
1000-1100 UT 0.98 5.78 5 SPO 5 TOTAL
1100-1145 UT 0.70 5.20 1 XDR 5 SPO 6 TOTAL
TOTALS 4.56 5.97 2 SAG 4 XDR 24 SPO 30 TOTAL
The first column is the period watched in Universal Time (PDT+7 hours).
The second column is the percent of the time actually watching the sky.
Time is lost for breaks, plotting, and data entry. The third column is
the average limiting magnitude during this period with a minimum of 4
estimates per period. The last column lists the activity seen during
each period.
I was facing North at an altitude of 60 degrees. No breaks were taken
during this session. SAG = SAGITTARIDS, XDR = Xi Draconids and SPO =
SPORADIC (random activity)
Beginning Temperature/Relative Humidity: 50 F (10 C) 61%
Ending Temperature/Relative Humidity: 39 F (4 C) 82%
MAGNITUDES:
SAG +1 (1) +3 (1) AVERAGE: +2.00
XDR +1 (1) +3 (2) +4 (1) AVERAGE: +2.75
SPO -2 (1) -1 (1) 0 (2) +1 (1) +2 (7) +3 (3) +4 (7) +5 (2
) AVERAGE: +2.46
Bob Lunsford
San Diego, California USA
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