The Resource How many Earth-approaching asteroids are there? : [semiannual status report], L.G. Taff, (microform)

How many Earth-approaching asteroids are there? : [semiannual status report], L.G. Taff, (microform)

Label
How many Earth-approaching asteroids are there? : [semiannual status report]
Title
How many Earth-approaching asteroids are there?
Title remainder
[semiannual status report]
Statement of responsibility
L.G. Taff
Creator
Contributor
Subject
Language
eng
Summary
"The discovery process of Earth-approaching asteroids is formulated as a periodic sampling problem from an urn with replacement. It presumes as unchanging number of such objects over recent historical times, a fixed limiting magnitude angular speed combination for detection probability, and allows for the possibility of the lack of detection or the lack of sufficient observations to refine an orbit at the first noticed apparition. While simple, the model is sufficiently powerful to show that an estimate of the number of Earth-approaching minor planets is impossible. This conclusion is insensitive to uncertainties in perturbing influences, celestial mechanics, or a model for the distribution of the orbital element sets of these minor planets."--NTIS abstract
Member of
Cataloging source
COD
http://library.link/vocab/creatorDate
1947-
http://library.link/vocab/creatorName
Taff, Laurence G.
Funding information
NASA
Government publication
federal national government publication
Index
no index present
Literary form
non fiction
Nature of contents
  • bibliography
  • technical reports
http://library.link/vocab/relatedWorkOrContributorName
  • Lincoln Laboratory
  • United States
Series statement
NASA-CR
Series volume
174209
http://library.link/vocab/subjectName
  • Near-earth asteroids
  • Asteroids
  • Search theory
  • Asteroids
  • Probability theory
  • Earth (planet)
  • Markov processes
  • Planets
Label
How many Earth-approaching asteroids are there? : [semiannual status report], L.G. Taff, (microform)
Instantiates
Publication
Base of film
safety base undetermined
Bibliography note
Includes bibliographical references (page [11])
Carrier category
microfiche
Carrier category code
he
Carrier MARC source
rdacarrier
Color
black and white
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
ocm164431035
Dimensions
4x6 in. or 11x15 cm.
Emulsion on film
diazo
Extent
10 pages, 1 unnumbered page.
Form of item
microfiche
Generation
service copy
Media category
microform
Media MARC source
rdamedia
Media type code
h
http://bibfra.me/vocab/marc/reductionRatio
02
ReductionRatioRange
normal reduction
Reproduction note
Microfiche.
Specific material designation
microfiche
Stock number
N 85-15650
System control number
(Sirsi) a1054032
Label
How many Earth-approaching asteroids are there? : [semiannual status report], L.G. Taff, (microform)
Publication
Base of film
safety base undetermined
Bibliography note
Includes bibliographical references (page [11])
Carrier category
microfiche
Carrier category code
he
Carrier MARC source
rdacarrier
Color
black and white
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
ocm164431035
Dimensions
4x6 in. or 11x15 cm.
Emulsion on film
diazo
Extent
10 pages, 1 unnumbered page.
Form of item
microfiche
Generation
service copy
Media category
microform
Media MARC source
rdamedia
Media type code
h
http://bibfra.me/vocab/marc/reductionRatio
02
ReductionRatioRange
normal reduction
Reproduction note
Microfiche.
Specific material designation
microfiche
Stock number
N 85-15650
System control number
(Sirsi) a1054032

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