LEONIDS 1998
Visual observations
by Valentin Grigore (IMO code: GRIVA)
Place:Targoviste, Romania
IMO Code 28 505
25d 29' 00" E
44d 57' 18" N
h~350 m alt
I was alone, so I noted myself the observations.
I made photos, using first time a camera and after 0130 two cameras.
Fireballs, including -7m, and persistent trains were captured.
Date: 1998.11.16/17
Per(UT) Teff(h) Lm(m) LEO Fireballs
------------------------------------------------------------------------------------
2244-2310 0.16 6.35 11
-7, -4.5
2310-2327 0.26 6.35 19
?
2335-2345 0.15 6.35 12
-3, -7
2345-2355 0.15 6.35 12
-7
2355-0000 0.15 6.35 10 -7, didn't note the magnitude for others
0000-0010 0.15 6.35 14
-8
0010-0020 0.15 6.35 25
-5, -6, -4
0020-0030 0.15 6.35 21
-4.5
0030-0040 0.15 6.35 15
-10, a strong flash of an unseen fireball
0040-0050 0.13 6.35 12
-4, -5, -10, -8, -4, -3, an other strong flash
0050-0100 0.15 6.35 31
-3.5, -3
0100-0110 0.15 6.35 32
-4, -6, -3, -4 , another stong flash in the sky
0110-0120 0.16 6.35 15
-3.5, -5
0120-0130 0.16 6.35 32
-7, -6, -6 -5, -7
0130-0140 0.15 6.35 22
-8, -9, -3
0140-0150 0.16 6.35 29
-15, -8, -10, -11, -3, -6, -11, -3, -4, -3
0150-0200 0.14 6.35 35
didn't note the magnitude
0200-0210 0.13 6.35 16
-3, -4, -6, -6, -12, -5
0210-0219 0.15 6.35 20
-5, -11, -4, -4, -5, -5, -3, -10
0219-0223 0.06 6.35 17
-9, didn't note the magnitude for others
0223-0226 0.05 6.35 17
-3, -3, -6, -5
0226-0231 0.10 6.35 11
-7, -4, -5, -3, -4
0234-0238 0.06 6.35 16
-4, -3, -4, -3, -6, -3
0238-0243 0.08 6.35 11
didn't note the magnitude
0243-0247 0.06 6.35 13
-4, -12, -7, -6, -3, -5
0247-0251 0.06 6.35 13
-3, -3
0251-0255 0.05 6.35 11
-3, -4
0255-0259 0.06 6.35 12
-4, -3, -5, -7
0259-0305 0.10 6.35 16
-2, -4.5, -3, -10, -6, -6
0305-0310 0.08 6.35 21
-3, -3, -3, -5, -7, -5, -4, -4, -3, -3
0310-0316 0.08 6.30 25
-6, -7, -6, -3, -3, -4, -5, -7
0320-0325 0.08 6.30 14
-4, -3, -3, -3, -6, -4
0325-0330 0.08 6.20 18
-3, -3, -3, -3, -3
0330-0335 0.08 6.10 22
-6, -6, -7, -3, -4
0335-0340 0.08 5.90 18
-3, -3, -3, -4, -7, -3, -5, -3
0340-0345 0.06 5.70 11
-3, -6
0345-0350 0.08 5.60 14
-3, -4, -6, -10
0350-0355 0.08 5.30 15
-4, -3, -5, -3, -4, -3
0355-0400 0.07 5.20 16
-5, -7, -3, -9
0400-0405 0.08 5.10 20
-3, -10, -3, -3, -12, -6, -4
0407-0410 0.05 4.50 17
-10, -3
0410-0415 0.07 3.90 16
-15, -8, -6, -3, -3, -3
0415-0420 0.08 3.00 15
-4, -4, -4, -4, (-10, -4, -5 at 04:17)
0420-0425 0.08 2.50 9
-3, -3
0425-0430 0.08 2.00 8
-4, -5, -3, -5
0430-0435 0.08 1.00 10
-4, -3, -5, -5, -4, -3
0435-0442 0.13 -0.50 7 -5, -3, -8, it is day -17, -4, -7
0505-a fireball near southern horizon line,in the red sky of sunrise.
0520-a fireball from zenith to South. The Sun is risen.
0539-a strong fireball, 45 degrees long, from zenith to North-East, at 30 min. after sunrise.
Many fireballs had persistent trains for 15, 20 or 25 min.
Magnitude distributions: * between 0055-0057 I saw 8 Leonids without magnitude estimations. Date: 1998.11.17/18 Magnitude distributions:
Period(UT) -15 -12 -11 -10 -9 -8 -7
-6 -5 -4 -3 -2 -1
0 +1 +2 +3 +4 +5 Tot
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
2244-2327 1 0.5 0.5 1.5 7.5 7 5.5 4.5 0.5 0.5 1 30
2340-0000
3
1 1.5 4 4.5 4.5 1 0.5 1 21
0000-0030
1 1
1.5 1.5 0.5 4.5 11 17.5 14.5 6.5 0.5 1 61
0030-0100*
2 1 1
2.5 3.5 7 7.5 14 9.5 2 50
0100-0130
2 3
2 2.5 2 5.5 16 17.5 19.5
5.5 2.5 1 79
0130-0150 1 2 1
1 2 1 1 4 1.5 12.5 15 6.5 2 0.5 51
0157-0219 1 1 1 1 2 4 3 2 3.5 11.5 5.5 3.5 2 41
0234-0234 1 1 1.5 0.5 1 5
Sometimes was imposible to note the magnitude.
After 02:34 UT it was practically impossible to give the magnitude for all Leonids, so it was made only for fireballs and sometime it was impossible to note for all fireballs.
Per(UT) Field Teff(h) F Lm(m) LEO TAU Spor Tot
-------------------------------------------------------------------------------------------------------------------
2350-0040 113 +32 0.81 1.00 6.40 17 7 1 25
0045-0151 113 +32 0.67 1.00 6.45 12 1 1 14
Shower -7 -2 -1 0 +1 +2 +3 +4 +5 6 Tot
------------------------------------------------------------------------------------------------------------------------------
LEO 6 6.5 7 7.5 2 29
TAU 1 0.5 0.5 2.5 0.5 2 0.5 0.5 8
Spor 0.5 1 0.5 2