J/A+A/622/A84 Meteor showers new parent bodies (Guennoun+, 2019)
A robust method to identify meteor showers new parent bodies from SonotaCo and
EDMOND meteoroid orbit Databases.
Guennoun M., Vaubaillon J., Capek D., Koten P., Benkhaldoun Z.
<Astron. Astrophys. 622, A84 (2019)>
=2019A&A...622A..84G 2019A&A...622A..84G (SIMBAD/NED BibCode)
ADC_Keywords: Minor planets ; Models
Keywords: methods: data analysis - methods: numerical -
meteorites, meteors, meteoroids - minor planets, asteroids: general
Abstract:
Several new meteor showers are added to the International Astronomical
Union (IAU) list of meteor showers every year. Given the
multiplication of video meteor measurements new parent bodies are to
be found in addition to new showers. Such an endeavor is usually
performed by comparing orbital elements, using a high threshold
single-linking Dsh-criterion. However, questions remain about the
accuracy of the method and the veracity of the newly associated parent
bodies.
Our goal is to find the presence of new parent bodies in a statistical
meaningful way.
A search for parent bodies was performed among SonotaCo and EDMOND
databases. The association of asteroids with meteors was based on
different methods, discussed and compared below. In addition, a
thorough statistical test was performed in order to investigate the
possible random associations.
A list of potential new parent bodies associated with at least 50
meteors is found. A statistical test was used to show whether the
group of meteor orbits and the asteroid is a random coincidence or
not. Out of 54 potential new parent bodies, only three new parent
bodies are not excluded by the statistical test: 2014 BN14, 2015 TX24
and 2015 QT3, with a probability of chance occurrence of 37, 10 and
13%, respectively. This shows the need for rigorous method when
searching for the existence of meteor showers and parent bodies.
Ideally, such a test (or even better, tests) should be conducted in
order to confirm (or not) the current IAU list of meteor showers.
Similarly, all meteor orbit data in our databases should ideally be
revisited using the latest methods providing a better estimate of the
real uncertainty and accuracy of the derived orbits.
Description:
We use the video meteor orbits of SonotaCo and Edmond Database to find
associations with a list of 15129 asteroids taken from JPL Small body
Database (https://ssd.jpl.nasa.gov accessed in Feb 2018) that provides
us with tables of orbital and/or physical parameters for all existing
asteroids and comets.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 62 81 List of the associations of the SonotaCo and EDMOND
Databases with the asteroid candidate
files/* . 81 Individual files
--------------------------------------------------------------------------------
See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2014)
https://www.meteornews.net/edmond/edmond/edmond-database : EDMOND database
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- Number ? Asteroid number (blank if unnumbered)
8- 20 A13 --- Name Asteroid name
22- 29 A8 --- DB [EDMOND SonotaCo] Database name
32- 62 A31 --- FileName Name of the file with associations in
subdirectory files
--------------------------------------------------------------------------------
Byte-by-byte Description of file: files/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 10 F8.4 deg RAdeg Right ascension of the meteor orbit
13- 20 F8.4 deg DEdeg Declination of the meteor orbit
24- 30 F7.4 km/s Vgeo Geocentric velocity
33- 40 F8.4 deg lambdaSun Solar longitude
45- 50 F6.4 AU q Perihelion distance
55- 60 F6.4 --- Ecc Eccentricity
63- 70 F8.4 deg omega Argument of perihelion
74- 80 F7.4 deg Incl Inclination
83- 90 F8.4 deg a Semi major axis
95-100 F6.4 AU Dist Distance to the radiant
105-110 F6.4 --- Dsh Dsh criterion
115-138 A24 --- Name Designation of the asteroid
142-161 A20 --- ltime Local time of the meteor
--------------------------------------------------------------------------------
Acknowledgements:
Meryem Guennoun, guennoun.meryem27(at)gmail.com
(End) Patricia Vannier [CDS] 18-Dec-2018