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J/A+A/287/990               Meteor stream activity.          (Jenniskens 1994)

Meteor stream activity. 1. The annual streams. Jenniskens P. <Astron. Astrophys. 287, 990 (1994)> =1994A&A...287..990J
ADC_Keywords: Comets Keywords: meteor: meteoroids - comets: general File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3a 77 50 Catalogue of meteor streams table3b 138 50 Properties related to the activity curve of the meteor streams table3c 135 6 Results for activity profiles with a background component
Byte-by-byte Description of file: table3a
Bytes Format Units Label Explanations
1- 4 A4 --- Code code name 6- 27 A22 --- Name common name of the stream 28- 30 I3 deg lo solar longitude for which radiant position is valid 32- 34 I3 deg RAdeg right ascension of radiant 36- 38 I3 deg DEdeg declination of radiant 40- 43 F4.1 --- dRA radiant drift in right ascension (degree of arc per degree of solar longitude) 45- 48 F4.1 --- dDE radiant drift in declination 50- 51 I2 km/s Vinf geocentric entry velocity of meteoroids in the atmosphere, which includes the Earth's gravitational acceleration 52 A1 --- n_Chi [*] when *, Chi varies with solar longitude 53- 55 F3.1 --- Chi magnitude distribution index (sporadic meteors Chi = 3.4) 57- 61 I5 --- N total number of meteors observed of this stream 63- 66 I4 h Neff total number of effective observing time 74- 75 I2 --- Nobs ? number of observers that contributed to data of this stream
Byte-by-byte Description of file: table3b
Bytes Format Units Label Explanations
1- 4 A4 --- Name abbreviation name 6- 11 F6.2 deg lo(max) ? solar longitude of peak position (from intersection point of slopes fitted to the data). Equinox 1950.0 (1) 12 A1 --- u_lo(max) [)] when ')', the values are for an assumed semi-major axis 13- 16 F4.2 deg e_lo(max) ? rms uncertainty on lo(max) 19 A1 --- l_ZHRmax limit flag on ZHRmax 20- 24 F5.1 h-1 ZHRmax peak rate (Zenith Hourly Rates) (1), (2) 25 A1 --- u_ZHRmax [)] when ')', the values are for an assumed semi-major axis 29- 32 F4.1 h-1 e_ZHRmax ? rms uncertainty on ZHRmax 35- 39 F5.3 deg-1 B ? slope of ascending and descending branches (1) 40 A1 --- u_B [)] when ')', the values are for an assumed semi-major axis 41 A1 --- n_B note on the slope B (4) 44- 48 F5.3 deg-1 e_B ? rms uncertainty on the slope B 53- 58 F6.2 yr P ? mean orbital period of meteoroids. (3) 59 A1 --- n_P [ :*i] : is an uncertainty flag on P * means that P is orbital period of parent comet i means infinity 60- 63 F4.2 AU q perihelion distance 66- 68 I3 deg i inclination of the orbit with respect to the ecliptic 71- 73 I3 deg Pi longitude of perihelion (sum of argument of perihelion (small omega) and the ascending node (large omega)) 76- 81 F6.3 g M(0) ? mass of zero magnitude meteor 83 A1 --- l_Rho limit flag on Rho 84- 89 F6.3 10-24g/cm3 Rho density of matter in the peak of the meteoroid stream 90 A1 --- u_Rho [)] when ')', the values are for an assumed semi-major axis 94- 98 F5.3 10-24g/cm3 e_Rho ? rms uncertainty on the density Rho 101 A1 --- l_M1yr limit flag on the mass M1yr 102-108 F7.4 10+14g M1yr ? total mass in a flux tube of length 1 year times heliocentric velocity 109 A1 --- u_M1yr [)] when ')', the values are for an assumed semi-major axis 113-119 F7.4 10+14g e_M1yr ? rms uncertainty on the mass M1yr 122 A1 --- l_Mtot limit flag on the mass Mtot 123-128 F6.3 10+15g Mtot ? total mass estimate (Mtot = M1yr x P) 129 A1 --- n_Mtot when *, value of Mtot is for an assumed period P = 20 yr. These streams lack photographically determined orbits 133-137 F5.3 10+15g e_Mtot ? rms uncertainty on the mass Mtot
Note (1): ZHR = ZHRmax 10^( -B |lo - lo(max)|) Note (2): The peak rate is in number per hour that can be seen by a standard observing in perfectly clear sky (star limiting magnitude = 6.5) and a radiant position in the zenith. Note (3): The average of the mean orbital period of meteoroids is over 1/a, where a is the semi-major axis of photographically determined orbits in the literature. Note (4): a: for Boo, B = 1.8 (4) b: for Gem, B = 0.39(4)/0.72(10) Values between brackets are for assumed semi-major axis
Byte-by-byte Description of file: table3c
Bytes Format Units Label Explanations
1- 4 A4 --- Name abbreviation name 6- 11 F6.2 deg lo(max) solar longitude of peak position 1950.0 14- 18 F5.1 h-1 ZHRmax(p) peak rate for the main peak 20- 23 F4.1 h-1 e_ZHRmax(p) rms uncertainty on ZHRmax 25 A1 --- l_Bp [ ~] limit flag on the slope Bp 26- 29 F4.2 deg-1 Bp ? slope of ascending and descending branches for the main peak 30 A1 --- n_Bp note on the slope Bp (1) 38- 41 F4.2 deg-1 e_Bp ? rms uncertainty on the slope Bp 43 A1 --- l_Mtot(p) [ ~] limit flag on the mass Mtot(p) 44- 50 F7.4 10+15g Mtot(p) total mass estimate for the main peak 53- 58 F6.4 10+15g e_Mtot(p) ? rms uncertainty on the mass Mtot(p) 60- 63 F4.1 h-1 ZHRmax(b) peak rate for the background 66- 68 F3.1 h-1 e_ZHRmax(b) rms uncertainty on ZHRmax(b) 70- 74 F5.3 deg-1 Bb+ slope of ascending branch 77- 81 F5.3 deg-1 e_Bb+ rms uncertainty on the slope Bb+ 84 A1 --- l_Bb- [ ~>] limit flag on the slope Bd- 85- 89 F5.3 deg-1 Bb- slope of descending branch 92- 96 F5.3 deg-1 e_Bb- ? rms uncertainty on the slope Bb- 100-105 F6.3 10+15g Mtot(b) total mass estimate for the background 108-112 F5.3 10+15g e_Mtot(b) rms uncertainty on the mass Mtot(b) 114-116 F3.1 --- Mb/Mp background to main peak mass ratio 119-121 F3.1 --- e_Mb/Mp rms uncertainty on Mb/Mp 123-128 F6.3 10+15g Mtot total mass estimate 131-135 F5.3 10+15g e_Mtot rms uncertainty on the mass Mtot
Note (1): a: For Gem, Bp = (0.59/0.81) ±0.07 Values between brackets are for assumed semi-major axis
Historical Notes: * 04-Mar-1994 : Description Standardized at CDS (Patricia Bauer) * 19-Dec-1995 : ReadMe file revisited
(End) Patricia Bauer [CDS] 19-Dec-1995
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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