About: On the maximum amplitude of harmonics of an asteroid lightcurve

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About: On the maximum amplitude of harmonics of an asteroid lightcurve Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Most asteroid lightcurves are dominated by the second harmonic of the rotation period, caused by elongated shape. However, if the shape is not very elongate, other harmonics may dominate, leading to ambiguity of which is the true rotation period. We argue from geometry that at low phase angle, harmonics other than the second with amplitude exceeding resp. 0.4 magnitude are nearly impossible, so lightcurves with larger amplitude than that suggest a unique period dominated by the second harmonic, unless the spin is complex, non-principal axis rotation. On the other hand, lightcurves with amplitude less than 0.2–0.3 magnitudes can be dominated by other harmonics, especially the 4th and 6th, so the period may be ambiguous unless odd harmonics can be found to identify the true rotation period. We present examples of each, low and high amplitude ambiguities. Most asteroid lightcurves are dominated by the second harmonic of the rotation period, caused by elongated shape. However, if the shape is not very elongate, other harmonics may dominate, leading to ambiguity of which is the true rotation period. We argue from geometry that at low phase angle, harmonics other than the second with amplitude exceeding resp. 0.4 magnitude are nearly impossible, so lightcurves with larger amplitude than that suggest a unique period dominated by the second harmonic, unless the spin is complex, non-principal axis rotation. On the other hand, lightcurves with amplitude less than 0.2–0.3 magnitudes can be dominated by other harmonics, especially the 4th and 6th, so the period may be ambiguous unless odd harmonics can be found to identify the true rotation period. We present examples of each, low and high amplitude ambiguities. (en)
Title	On the maximum amplitude of harmonics of an asteroid lightcurve On the maximum amplitude of harmonics of an asteroid lightcurve (en)
skos:prefLabel	On the maximum amplitude of harmonics of an asteroid lightcurve On the maximum amplitude of harmonics of an asteroid lightcurve (en)
skos:notation	RIV/67985815:_____/14:00429291!RIV15-GA0-67985815
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP209/12/0229)
http://linked.open...iv/cisloPeriodika	June
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Hornoch, Kamil Kušnirák, Peter Pravec, Petr Galád, Adrián
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	34458
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/14:00429291
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	asteroids; asteroids rotation; photometry (en)
http://linked.open.../riv/klicoveSlovo	photometry asteroids asteroids rotation
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[5B1C961345CC]
http://linked.open...i/riv/nazevZdroje	Icarus
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	16 (xsd:int)
http://linked.open...vavai/riv/projekt	Study of non-gravitational asteroid evolution processes via photometric observations
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	235
http://linked.open...iv/tvurceVysledku	Gajdoš, Š. Galád, Adrián Higgins, D. Hornoch, Kamil Kušnirák, Peter Pravec, Petr Világi, J. Warner, B. D. Harris, A. W. Gross, J. Terrell, D. Bowell, E. Carbognani, A. Cooney jr., W. R. Koehn, B. W. Skiff, B. A.
http://linked.open...ain/vavai/riv/wos	000335291600005
issn	0019-1035
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.icarus.2014.03.004

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