1. as a means of recovering THE CASE OF COMET 1917/F1 (MELLISH)
Meteor showers
as a means of recovering
the orbital history of comets
THE CASE OF COMET 1917/F1 (MELLISH)
L. Neslušan1, J. Vaubaillon2, M. Hajduková Jr.1
1 Astronomical Institute, Slovak Academy of Sciences, Slovakia
2 IMCCE, France

2. MODELING METEOROID STREAMS
gravitational action a stream can split into several filaments:
a single parent body can associate several meteor showers

3. the dynamical evolution
MODELING METEOROID STREAMS
gravitational action a stream can split into several filaments:
a single parent body can associate several meteor showers
non-gravitational forces
influencing
the dynamical evolution
influencing of the meteoroids
the parent
comet dynamics
P-R DRAG
ROCKET EFFECT

4. the dynamical evolution
MODELING METEOROID STREAMS
gravitational action a stream can split into several filaments:
a single parent body can associate several meteor showers
non-gravitational forces
influencing
the dynamical evolution
influencing of the meteoroids
the parent
comet dynamics
OBSERVED SHOWERS PREDICTED SHOWERS
P-R DRAG
ROCKET EFFECT

5. the dynamical evolution
MODELING METEOROID STREAMS
gravitational action a stream can split into several filaments:
a single parent body can associate several meteor showers
non-gravitational forces
influencing
the dynamical evolution
influencing of the meteoroids
the parent
comet dynamics
OBSERVED SHOWERS PREDICTED SHOWERS
P-R DRAG
ROCKET EFFECT
recovery of the comets’ PAST orbitAL evolution

6. METEOR SHOWER COMPLEX OF COMET C/1917 F1

7. METEOR SHOWER COMPLEX OF COMET C/1917 F1
۰ Video meteors
۰ Photographic meteors

8. METEOR SHOWER COMPLEX OF COMET C/1917 F1
APRIL ρ-CYGNIDS ? F3
December
Monocerotids F4
۰ Video meteors
۰ Photographic meteors

9. ON THE STREAM STRUCTURE
INFLUENCE OF VARIOUS
EVOLUTIONARY TIMES
ON THE STREAM STRUCTURE
single parent comet various showers of different ages

10. INFLUENCE OF VARIOUS EVOLUTIONARY TIMES
tev = 5 kyr

11. INFLUENCE OF VARIOUS EVOLUTIONARY TIMES
tev = 10 kyr

12. INFLUENCE OF VARIOUS EVOLUTIONARY TIMES
tev = 20 kyr

13. INFLUENCE OF VARIOUS EVOLUTIONARY TIMES
tev = 30 kyr

14. INFLUENCE OF VARIOUS EVOLUTIONARY TIMES
tev = 50 kyr

15. INFLUENCE OF VARIOUS EVOLUTIONARY TIMES
tev = 70 kyr

17. ON THE STREAM STRUCTURE
INFLUENCE OF VARIOUS
STRENGTHS OF P-R DRAG
ON THE STREAM STRUCTURE
particles of various sizes

18. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β = 0.0

19. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β = 0.0

20. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β =

21. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β = 0.001

22. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β = 0.002

23. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β = 0.003

24. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β = 0.005

25. INFLUENCE OF VARIOUS STRENGTHS OF P-R DRAG
β = 0.007

27. F2
F1, F3, F4

28. THE COMET’S ORBIT IN TIME CLONES OF THE COMET’S ORBIT
WHEN THE PARTICLES WERE RELEASED
CLONES OF THE COMET’S ORBIT

29. CLONED ORBIT OF THE COMET No 4
tev = 10kyr
β = 0.001
β = 0.002
β = 0.005

30. CLONED ORBIT OF THE COMET No 4
tev = 20kyr
β = 0.001
β = 0.005
β = 0.009

31. CLONED ORBIT OF THE COMET No 4
tev = 20kyr F2
F1, F3, F4
β = 0.001
β = 0.005
β = 0.009

32. CLONED ORBIT OF THE COMET No 4
tev = 50kyr
β = 0.001
β = 0.005
β = 0.009

33. SEARCH FOR A CONVERGENCE OF THE ORBITS OF REAL METEORS
BACKWARD INTEGRATION

34. ORBIT OBTAINED BY BACKWARD INTEGRATION
OF OBSERVED METEORS

35. CONCLUSIONS
to point out an eventual recovery of the past comet’s orbit by studying its observed meteor showers
in case of success: the meteor databases a tool for tracing the past dynamical history of parent bodies that associate more than a single meteor shower