NDLI: Dynamical evolution of the nucleus of comet Hartley 2 and Asteroid Itokawa

Content Provider	Springer Nature Link
Author	Ksanfomality, L. V.
Copyright Year	2011
Abstract	Cometary nuclei are being actively studied using spacecrafts. In November 2010, the Deep Impact spacecraft (EPOXI project, NASA) approached the nucleus of comet 103P/Hartley 2 and returned images of this small celestial body having a dumbbell shape with a smooth neck. Since rotation of the nucleus leads to centrifugal forces, it is assumed that the dumbbell neck appeared as the result of their effect and the neck is lengthening slowly but continuously, which should eventually result in fragmentation of the nucleus. This paper considers dynamical evolution of the nucleus of comet Hartley 2. Calculations show that centrifugal forces exceed gravitational forces in the narrow part, and the nucleus can indeed undergo upcoming breakup and fragmentation into two parts. If there are no external perturbations, both parts of the celestial body will drift apart to a distance of less than 1 km from each other. The nucleus of comet Hartley 2 is an observed example of breakup of a celestial body. Asteroid Itokawa is considered, which has a similar feature but does not seem to undergo breakup.
Starting Page	504
Ending Page	514
Page Count	11
File Format	PDF
ISSN	00380946
Journal	Solar System Research
Volume Number	45
Issue Number	6
e-ISSN	16083423
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-11-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Planetology Astronomy, Observations and Techniques Astrophysics and Astroparticles Astronomy, Astrophysics and Cosmology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Determination of the height of the “meteoric explosion”

Extinct comets and asteroid-meteoroid complexes

On asteroid distribution

Methods and means of information-analytical assessment of asteroid and comet hazard

On the concept of the russian information and analytical center for asteroid and comet hazards

Peculiarities of the motion of asteroid 99942 Apophis

Asteroid Apophis: Evaluating the impact hazards of such bodies

Results of the new reduction of positional observations of the asteroid Ceres

Estimating the strength of the nucleus material of comet 67P Churyumov–Gerasimenko

Dynamical evolution of the nucleus of comet Hartley 2 and Asteroid Itokawa

Similar Documents

Determination of the height of the “meteoric explosion”

Extinct comets and asteroid-meteoroid complexes

On asteroid distribution

Methods and means of information-analytical assessment of asteroid and comet hazard

On the concept of the russian information and analytical center for asteroid and comet hazards

Peculiarities of the motion of asteroid 99942 Apophis

Asteroid Apophis: Evaluating the impact hazards of such bodies

Results of the new reduction of positional observations of the asteroid Ceres

Estimating the strength of the nucleus material of comet 67P Churyumov–Gerasimenko

Dynamical evolution of the nucleus of comet Hartley 2 and Asteroid Itokawa