Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)

Detalhes bibliográficos
Autor(a) principal: Belskaya, I.N.
Data de Publicação: 2006
Outros Autores: Ortiz, J.L., Rousselot, P., Ivanova, V., Borisov, G., Shevchenko, V.G., Peixinho, N.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/4395
https://doi.org/10.1016/j.icarus.2006.04.015
Resumo: We present the results of photometric observations of trans-neptunian object 20000 Varuna, which were obtained during 7 nights in November 2004-February 2005. The analysis of new and available photometric observations of Varuna reveals a pronounced opposition surge at phase angles less than 0.1 deg with amplitude of 0.2 mag relatively to the extrapolation of the linear part of magnitude-phase dependence to zero phase angle. The opposition surge of Varuna is markedly different from that of dark asteroids while quite typical for moderate albedo Solar System bodies. We find an indication of variations of the scattering properties over Varuna's surface that could result in an increase of the lightcurve amplitude toward zero phase angle. It is shown that a similar phase effect can be responsible for lightcurve changes found for TNO 19308 (1996 TO66) in 1997-1999.
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spelling Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)Trans-neptunian objectsAsteroidsPhotometryWe present the results of photometric observations of trans-neptunian object 20000 Varuna, which were obtained during 7 nights in November 2004-February 2005. The analysis of new and available photometric observations of Varuna reveals a pronounced opposition surge at phase angles less than 0.1 deg with amplitude of 0.2 mag relatively to the extrapolation of the linear part of magnitude-phase dependence to zero phase angle. The opposition surge of Varuna is markedly different from that of dark asteroids while quite typical for moderate albedo Solar System bodies. We find an indication of variations of the scattering properties over Varuna's surface that could result in an increase of the lightcurve amplitude toward zero phase angle. It is shown that a similar phase effect can be responsible for lightcurve changes found for TNO 19308 (1996 TO66) in 1997-1999.http://www.sciencedirect.com/science/article/B6WGF-4K4PSTX-2/1/447c751a99c7de80e8073e91841b18792006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4395http://hdl.handle.net/10316/4395https://doi.org/10.1016/j.icarus.2006.04.015engIcarus. 184:1 (2006) 277-284Belskaya, I.N.Ortiz, J.L.Rousselot, P.Ivanova, V.Borisov, G.Shevchenko, V.G.Peixinho, N.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:49:07Zoai:estudogeral.uc.pt:10316/4395Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:36.383755Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
title Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
spellingShingle Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
Belskaya, I.N.
Trans-neptunian objects
Asteroids
Photometry
title_short Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
title_full Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
title_fullStr Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
title_full_unstemmed Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
title_sort Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
author Belskaya, I.N.
author_facet Belskaya, I.N.
Ortiz, J.L.
Rousselot, P.
Ivanova, V.
Borisov, G.
Shevchenko, V.G.
Peixinho, N.
author_role author
author2 Ortiz, J.L.
Rousselot, P.
Ivanova, V.
Borisov, G.
Shevchenko, V.G.
Peixinho, N.
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Belskaya, I.N.
Ortiz, J.L.
Rousselot, P.
Ivanova, V.
Borisov, G.
Shevchenko, V.G.
Peixinho, N.
dc.subject.por.fl_str_mv Trans-neptunian objects
Asteroids
Photometry
topic Trans-neptunian objects
Asteroids
Photometry
description We present the results of photometric observations of trans-neptunian object 20000 Varuna, which were obtained during 7 nights in November 2004-February 2005. The analysis of new and available photometric observations of Varuna reveals a pronounced opposition surge at phase angles less than 0.1 deg with amplitude of 0.2 mag relatively to the extrapolation of the linear part of magnitude-phase dependence to zero phase angle. The opposition surge of Varuna is markedly different from that of dark asteroids while quite typical for moderate albedo Solar System bodies. We find an indication of variations of the scattering properties over Varuna's surface that could result in an increase of the lightcurve amplitude toward zero phase angle. It is shown that a similar phase effect can be responsible for lightcurve changes found for TNO 19308 (1996 TO66) in 1997-1999.
publishDate 2006
dc.date.none.fl_str_mv 2006
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/4395
http://hdl.handle.net/10316/4395
https://doi.org/10.1016/j.icarus.2006.04.015
url http://hdl.handle.net/10316/4395
https://doi.org/10.1016/j.icarus.2006.04.015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Icarus. 184:1 (2006) 277-284
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