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Re: (meteorobs) Geminids from China (Dec. 14/15 ZHUJI)
Jin Zhu,
It would appear you had a very impressive night of observing during
the Geminids. I have a very honest curiosity (rather than an obtuse,
one-line question of doubt) as to your sporadic totals. You have listed 175
Geminids vs 163 sporadics. That is a high number of sporadics, even given
that many will be HYDs and what-not. What is your impression of the
sporadic totals?
By the way, I have enjoyed reading your observations this past year. You
and your observing collegues in China have been quite busy, it would appear,
please keep us informed of your observations!
Kim S. Youmans
Jin Zhu wrote:
> ***************************
> NAMN VISUAL SUMMARY REPORT
> ***************************
> DATE: Dec 14/15, 1999 BEGIN: 13:26 UT END: 18:04 UT
> OBSERVER: Jin Zhu (ZHUJI)
>
> LOCATION: Long: 117 d 34' 42" East; Lat: 40 d 23' 47" North
> Place: Xinglong, Hebei, CHINA Elevation: 860 m.
>
> RECORDING METHOD: tape recorder
> ----------------------------------------------------------------------
> OBSERVED SHOWERS: 3-letter code; radiant position; radiant diameter
> GEM RA 112 deg. DEC +33 deg.
> MON RA 103 deg. DEC +08 deg.
> XOR RA 093 deg. DEC +23 deg.
> -----------------------------------------------------------------------
> OBSERVING PERIODS: 0=none seen; /=shower not watched
> -----------------------------------------------------------------------
> PERIOD (UT) FIELD TEFF F LM GEM MON XOR SPO
> 13:26-13:30 E,90 0.08 1.05 6.0 4 0 1 4
> 13:46-14:00 E,90 0.25 1.05 5.5 7 2 3 3
> 14:01-14:15 E,90 0.25 1.05 5.9 5 0 0 9
> 14:16-14:30 E,90 0.25 1.05 5.9 3 1 4 7
> 14:31-14:45 E,90 0.25 1.05 5.9 10 0 1 14
> 14:46-14:59 E,90 0.23 1.05 6.0 8 2 8 6
> 15:00-15:14 E,90 0.25 1.05 6.0 11 0 3 14
> 15:15-15:30 E,90 0.26 1.05 5.5 5 3 4 11
> 15:31-15:45 E,90 0.25 1.05 5.5 13 2 1 12
> 15:46-15:59 E,90 0.23 1.05 6.0 8 3 4 5
> 16:00-16:14 E,90 0.25 1.05 6.0 13 1 4 6
> 16:15-16:21 E,90 0.12 1.05 6.0 7 0 1 4
> 16:24-16:44 S,80 0.35 1.05 6.0 16 2 4 10
> 16:45-16:59 S,80 0.25 1.05 6.0 15 1 2 7
> 17:00-17:14 S,80 0.25 1.05 6.2 5 2 2 9
> 17:15-17:33 S,80 0.32 1.05 6.2 18 0 4 17
> 17:34-17:45 S,90 0.20 1.05 6.2 9 1 1 9
> 17:46-17:59 S,90 0.23 1.05 6.2 16 0 0 10
> 18:00-18:04 S,90 0.08 1.05 6.2 2 0 0 6
> -----------------------------------------------------------------------
> TOTALS 4.35 175 20 47 163
> -----------------------------------------------------------------------
> MAGNITUDE DISTRIBUTIONS:
> SHOWER -8 -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 TOTAL
> GEM 0 0 0 0 1 1 2 8 22 31 28 27 36 19 0 175
> MON 0 0 0 0 0 0 0 1 1 2 4 4 5 3 0 20
> XOR 1 0 0 0 0 0 0 5 1 10 7 4 14 5 0 47
> SPO 0 0 0 0 0 0 2 4 8 30 28 35 38 17 1 163
> -----------------------------------------------------------------------
> TOTAL 1 0 0 0 1 1 4 18 32 73 67 70 93 44 1 405
> -----------------------------------------------------------------------
> SKY OBSCURED: _5_%
> FROM: 13:26UT
> TO: 18:04UT
> -----------------------------------------------------------------------
> DEAD TIME: None
> BREAKS: 13:30-13:46,16:22-16:24,16:48-16:49,17:01-17:02
> -----------------------------------------------------------------------
> LIMITING MAGNITUDE:
>
> STAR STAR
> TIME AREA COUNT LM
>
> 13:50 17 10 5.5
> 14:14 17 11 5.9
> 14:51 17 12 6.0
> 15:32 17 10 5.5
> 15:53 17 12 6.0
> 16:34 17 12 6.0
> 17:05 17 13 6.2
> 17:27 17 13 6.2
> 18:04 17 13 6.2
>
> MEAN LIMITING MAGNITUDE: 6.0
> ---------------------------------------------------------------------
> METEOR DATA:
>
> # TIME(UT) MAG VEL. COLOR SHOWER TRAIN MAP ACCURACY
> -------------------------------------------------------------
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