Near-parabolic comets observed in 2006–2010. The individualized approach to 1/a-determination and the new distribution of original and future orbits

@article{Krlikowska2013NearparabolicCO,
  title={Near-parabolic comets observed in 2006–2010. The individualized approach to 1/a-determination and the new distribution of original and future orbits},
  author={Małgorzata Kr{\'o}likowska and Piotr A. Dybczyński},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={435},
  pages={440-459}
}
Dynamics of a complete sample of 22 small perihelion distance near-parabolic comets discovered in the years 2006 - 2010 is studied. First, osculating orbits are obtained after a careful positional data inspection and processing, including where appropriate, the method of data partitioning for determination of pre- and post-perihelion orbit for tracking then its dynamical evolution. The nongravitational acceleration in the motion is detected for 50 per cent of investigated comets, in a few… 
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References

SHOWING 1-10 OF 19 REFERENCES
Where do long‐period comets come from? Moving through the Jupiter–Saturn barrier
The past and future dynamical evolution of all 64 long-period comets having 1/aori 3.0 au and discovered after 1970 is studied. For this sample of Oort-spike comets we have obtained a new,
Dynamical history of the observed long-period comets
We present results of some numerical studies on the dynamical history of a large number of observed long-period comets. In our investigations we include all comets with good quality orbits. We
Different dynamical histories for comets C/2001 Q4 and C/2002 T7?
Context. Both, C/2001 Q4 and C/2002 T7, are widely regarded in the literature as dynamically new comets that are visiting our planetary system for the first time from the Oort Cloud. Aims. We study
A study of the original orbits of "hyperbolic" comets
The problem of hyperbolic incoming orbits for single-apparition comets is investigated. In this context the effect of non-gravitational acceleration on cometary dynamics was analyzed for the sample
New osculating orbits for 110 comets and analysis of original orbits for 200 comets
Osculating orbits are presented for 110 nearly parabolic comets. Combining these with selected orbit determinations from other sources, a total of 200 orbits are considered where the available
Where do long‐period comets come from? 26 comets from the non‐gravitational Oort spike
Since 1950, when Oort published his hypothesis, several important new facts have been established in this field. At present, there are still questions surrounding the apparent source region (or
The Daytime Craterids, a radar-detected meteor shower outburst from hyperbolic comet C/2007 W1 (Boattini)
We report a new daytime meteor shower detected with the Canadian Meteor Orbit Radar (CMOR). This shower has a radiant in the southern constellation Crater. The Daytime Craterid shower was observed in
The last revolution of new comets: the role of stars and their detectability
Context. This work is a follow-up of a previous study, where we simulated the dynamical evolution of the Oort Cloud over 5 Gyr with special attention to the injection of comets into observable
Long-period comets with non-gravitational effects
The influence of non-gravitational effects on the motion of long-period comets is analyzed. Investigations were performed for about 60 nearly-parabolic comets discovered during the last thirty years.
...
...