Low phase angle effects in photometry of trans-neptunian objects: 20000 Varuna and 19308 (1996 TO66)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2006 |
Outros Autores: | , , , , , |
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. |
id |
RCAP_99f00b80d36b0bc8a49428c9d8e19117 |
---|---|
oai_identifier_str |
oai:estudogeral.uc.pt:10316/4395 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
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 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
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 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799133887749685248 |