NDLI: Deflection of Hazardous Near-Earth Objects by High Concentrated Sunlight and Adequate Design of Optical Collector

Content Provider	Springer Nature Link
Author	Vasylyev, V. P.
Copyright Year	2012
Abstract	Some detailed astronomical and applied aspects deflection of hazardous near-Earth objects (NEO) by direct high concentrated sunlight, causing intensive local ablation of their surfaces, are considered. The major requirements to solar concentrating optics within a single collector (a large mirror) approach, along with the asteroid properties being most substantial in achieving the predetermined effect for the period less than a year (mid-thrust action), are discussed. Such a hastened strategy may become topical in the case of late detection of potential danger, and also, if required, in providing the possibility for some additional action. It is also more acceptable in the public perception and keeping the peace for mankind rather than a long-run expectation of the incorrigible deflection resulting shortly ahead of the predicted hazard. The conventional concave reflectors have been graved to be practically inapplicable within the high concentrating geometry. This is primarily because of the dramatic spread of their focal spots at needful inclinations of optical axis from the direction toward the Sun, as well as of problematic use of the secondary optics. An alternative design of a mirrored ring-array collector is presented (as a tested and approved point-focus version of innovative reflective lenses for sunlight concentration within this approach), and comparative analysis was made. The assessment argues in favor of such a type of high-aperture optics having more capabilities than conventional devices. Mainly, this is because of the underside position (as respects the entrance aperture) of its focal area that allows avoidance of target shadowing the reflecting surfaces and minimizes their coating by the ejected debris. By using the modern asteroids database, some key estimations have been obtained. The surface irradiance around 4–5 MW/m$^{2}$ (average across the focal spot concentration level ~5 × 10$^{3}$) for the ring-array collector size ~0.5 of asteroid diameter might suffice to deflect a 0.5-km-diameter NEO during several months. For the larger diameter NEOs, to 1.3–2.2 km, the required collector sizes are about the asteroid diameters, and they are even greater for more massive objects.
Starting Page	67
Ending Page	79
Page Count	13
File Format	PDF
ISSN	01679295
Journal	Earth, Moon, and Planets
Volume Number	110
Issue Number	1-2
e-ISSN	15730794
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-12-22
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Hazardous near-Earth objects Deflection by high concentrated sunlight Asteroid properties Mid-thrust action Ring-array concentrating collector Astronomy, Observations and Techniques Planetology Extraterrestrial Physics, Space Sciences Astrophysics and Astroparticles
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

On population of hazardous celestial bodies in the near-Earth space

The Near Earth Asteroid Rendezvous Mission

Target selection and accessibility for rendezvous with a Near-Earth asteroid mission

Distribution of the near-earth objects

The Genesis Mission

Near-Sun asteroids

Observations of the potentially hazardous asteroid 275677 and the modeling of its shape

Capture of near-Earth objects with low-thrust propulsion and invariant manifolds

Near-Earth space as an object of global monitoring

Deflection of Hazardous Near-Earth Objects by High Concentrated Sunlight and Adequate Design of Optical Collector

Similar Documents

On population of hazardous celestial bodies in the near-Earth space

The Near Earth Asteroid Rendezvous Mission

Target selection and accessibility for rendezvous with a Near-Earth asteroid mission

Distribution of the near-earth objects

The Genesis Mission

Near-Sun asteroids

Observations of the potentially hazardous asteroid 275677 and the modeling of its shape

Capture of near-Earth objects with low-thrust propulsion and invariant manifolds

Near-Earth space as an object of global monitoring

Deflection of Hazardous Near-Earth Objects by High Concentrated Sunlight and Adequate Design of Optical Collector