[Prev][Next][Index][Thread]
(meteorobs) Fwd: July 20 Observations
-- [ From: Robert Lunsford * EMC.Ver #2.5.3 ] --
I watched for 4 hours this morning from the Descanso observatory . Skies
were clear the first hour but during the remaining 3 hours of the night
I had a constant cover of thin cirrus from dissipating thunderstorms.
The 3rd hour was especially bad as there were lightning flashes every 15
seconds from behind the hill to the northeast. Some flashes were quite
intense lighting up the entire sky. The Milky Way could be seen through
the clouds but the meteor activity was obviously curtailed. The
highlight of the session was a short -2 South Delta Aquarid seen in
Camelopardalis.
July 20, 1998
0730-0830 UT 0.91 6.24 1 CAP 3 NDA 1 PER 7 SPO 12 TOTAL
0830-0930 UT 0.95 5.83 1 ACY 2 NDA 1 SDA 3 SPO 7 TOTAL
0930-1030 UT 0.98 5.75 1 NDA 1 PAU 1 SPO 3 TOTAL
1030-1130 UT 0.96 5.42 1 ACY 1 SDA 4 SPO 6 TOTAL
TOTALS 3.80 5.81 2 ACY 1 CAP 6 NDA 1 PAU 1 PER 2
SDA 15 SPO 45 TOTAL
The first column is the period watched in Universal Time (PDT+7 hours).
The second column is the percent of an hour actually spent 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 columns list the activity seen during
each period.
I was facing north at an altitude of 70 degrees. No breaks were taken
during this session. ACY = ALPHA CYGNIDS (DMS), CAP = CAPRICORNIDS, NDA
= NORTH DELTA AQUARIDS, PAU = PISCIS AUSTRINIDS, PER = PERSEIDS, SDA =
SOUTH DELTA AQUARIDS, and SPO = SPORADIC (random activity)
Beginning Temperature/Relative Humidity: 58 F (14 C) 65%
Ending Temperature/Relative Humidity: 59 F (15 C) 65%
MAGNITUDES:
ACY +2 (1) +3 (1) AVERAGE : +2.50
CAP +3 (1) AVERAGE: +3.00
NDA -1 (1) +1 (1) +3 (1) +4 (3) AVERAGE: +2.50
PAU +3 (1) AVERAGE: +3.00
PER +3 (1) AVERAGE: +3.00
SDA -2 (1) +4 (1) AVERAGE +1.00
SPO +2 (3) +3 (7) +4 (3) +5 (2) AVERAGE: +3.27
Bob Lunsford
San Diego, California USA