Marcelo Assafin

Instituição:

Universidade Federal do Rio de Janeiro

Centro:

Centro de Ciências Matemáticas e da Natureza

Unidade:

Observatório do Valongo

Departamento:

Departamento de Astronomia/Valongo

ORCID:

https://orcid.org/0000-0002-8211-0777


Formação:

  • United States Naval Observatory

    | Pós-Doutorado | 2001 - 2002

  • Observatório Nacional

    Astronomia | Doutorado | 1990 - 1996

  • Observatório Nacional

    Astronomia | Mestrado | 1988 - 1990

  • Universidade Federal do Rio de Janeiro

    Astronomia | Graduação | 1983 - 1988
Laboratórios:
Nenhum laboratório cadastrado
Nuvens de Palavras:
Artigos:
Nenhum artigo cadastrado
Eventos:

(5.67% eventos com DOI)

Titulo DOI Ano
Size, shape, and topography of TNOs from stellar occultations: the case of (307261) 2002 MS4 2022
Search for confine material around the TNO (50000) Quaoar 2022
Physical properties of the trans-Neptunian binary 2000 YW134 2022
Search for rings around the large Trans-Neptunian Object (50000) Quaoar 2022
The 11 November 2021 multi-chord stellar occultation by trans-Neptunian object (119951) 2002 TC302 2022
Unveiling the Kuiper belt from the JWST through stellar occultations 2022
The Trans-Neptunian Object (19521) Chaos as seen from stellar occultations and photometry observations 2022
Recent results of stellar occultations by (60558) Echeclus 2022
The first multichord stellar occultation by the trans-Neptunian Binary (82075) 2000 YW134 2022
Evidence of topographic features on (307261) 2002 MS4 surface 2021
Physical Characterization of Trans-Neptunian Object (119951) 2002 KX14 from Stellar Occultation and Photometric Observations 2021
Physical properties of Hiʻiaka from stellar occultation data 2021
The January 11th, 2019 stellar occultation by the elongated centaur Bienor 2020
Results on stellar occultations by (307261) 2002 MS4 2020
The intriguing shape of Bienor 2020
Triton's temperature profile and time evolution from the October 5th 2017 stellar occultation 2019
Three Stellar Occultations by the Plutino Object (84922) 2003 VS2 2019
The stellar occultation by the TNO (174567) Varda of September 10, 2018: size, shape and atmospheric constraints 2019
Pluto's ephemeris from stellar occultations 2019
Studying Centaur and Trans-Neptunian objects using stellar occultation: precise astrometric positions 2019
The first stellar occultations by irregular satellites 2019
Prediction of stellar occultations by distant Solar System objects with Gaia 2019
Prediction of stellar occultations by distant solar system bodies in the Gaia era 2018
Solar system astrometry, Gaia, and the large surveys - a huge step ahead to stellar occultations by distant small solar system bodies 2018
Stellar Occultation of Triton on October 5th, 2017 2018
Chariklo's body and ring system: three multi-chord stellar occultations in 2017 2018
The 19th of July 2016 Multi-Chord Stellar Occultation by Pluto - A European PRO-AM cooperation 2017
The November 14th, 2014 Stellar Occultation by the TNO 2007UK126 2015
Lessons learned from stellar occultations by Trans-Neptunian Objects and prospects for the future 2014
SPARC4 A simultaneous polarimeter and rapid camera in 4 bands 10.1063/1.3701935 2012
Concept of SPARC4: a simultaneous polarimeter and rapid camera in 4 bands 10.1117/12.924976 2012
The 2009 occultation of the bright star 45 Cap by Jupiter 2012
The stellar occultation by Makemake on 2011 April 23 2011
Size, density, albedo and atmosphere limit of dwarf planet Eris from a stellar occultation 2011
Stellar Occultations by TNOs: the January 08, 2011 by (208996) 2003 AZ84 and the May 04, 2011 by (50000) Quaoar 2011
Asteroid Apophis orbit from recent observations 2011
Observations of Stellar Occultations by Dwarf Planets and TNOs - International Campaigns 2011
The 2010, February 19 stellar occultation by Varuna 2010
The 17 August 2010 stellar occultation by the dwarf-planet 1 Ceres 2010
Astrometric and Photometric Variability in Quasars 10.1017/S1743921310005648 2009
CCD Observations an Modeling of 4492 Debussy Eclipsing Asteroid 2008
A pilot astrometric survey of 59 northern ICRF radio-sources 10.1063/1.2993633 2008
A GAIA oriented analysis of a large sample of quasars 2008
Pluto Atmospheric Activity, Ephemeris Offset and Charon Orbital Radius Constrained by Stellar Occultations 2008
Search for Small Satellites and Rings Orbiting Pluto through Stellar Occultations 2008
Véron&Véron Based Optical Extragalactic Reference Frame - Progress Report 10.1017/S1743921307011374 2007
An Observing Campaign of the Mutual Events Within (617) Patroclus-Menoetius Binary Trojan System 2007
The July 31, 2007 Stellar Occultation by Pluto 2007
Pluto's Atmospheric Activity, Ephemeris Offset and Satellite Detections from Observations in 2007 2007
Astrometric detection of faint companions ¿ the Pluto/Charon case study 10.1017/S1743921308018747 2007
A Gaia oriented analysis of a large sample of quasars 10.1017/S1743921308019212 2007
Astrometry by small ground-based telescopes 10.1017/S1743921308019340 2007
Observing Two Pluto Stellar Approaches In 2006: Results On Pluto's Atmosphere And Detection Of Hydra 2006
Le système double d'Antiope 2006
Observations astrométriques de Pluton - Le problème du photocentre 2006
Conection between the ICRF and the dinamical reference frame for the outer planets 2005
Astrometric representation of the GAIA extragalactic reference frame from ground observations 2005
Probabilistic representation of the GAIA extragalactic reference frame 2005
Véron & Véron based extragalactic reference frame 2005
Evidence of Non-Coincidence between Radio and Optical Positions of ICRF Sources 2004
Diferent Approaches Used to Obtain Optical Counterparts Positions of Extragalactic Radio Sources 2004
Analysis of Reference Frames in the Hipparcos System 2004
A fast and precise way to link one optical frame to ICRS 2004
UCAC2 based CCD positions of ICRF sources 2004
Astrophysical constraints for the GAIA extragalactic reference frame 2004
Conexão entre o ICRS e o Referencial Dinâmico para planetas exteriores 2004
A Joint Collaboration Between USNO And Brazil on the Astrometry of ICRF Souces 2004
Astrometry for Optical Counterparts of ICRF Sources 2003
Precise Optical Positions for ICRF Sources Using the 0.6m and 1.6m LNA Telescopes 2003
Celestial and Local Reference Frames: the ICRF Representation and the GAIA Representation 2003
Celestial and Local Reference Frames: the GAIA Representation and the ICRF Representation 2003
Non-Coincidence between Radio and Optical Positions of ICRF Sources 2002
A Joint Collaboration Between USNO and Brazil on The Astrometry of ICRF Sources 2002
Different Approaches Used to Obtain Optical Positions from ICRF Sources 2002
An analysis of the Tycho2 Catalogue as Representation of the Hipparcos System 2002
CCD Positions of Extragalatic Radio Sources in the UCAC-1 Catalog System 2002
Astrometric CCD Positions of Extragalactic Radio Sources from the Valinhos-LNA Program 2002
Analysis of Reference Frames in The HIPPARCOS System 2002
A Joint Project Between USNO and Brazil - The Astrometry of ICRF Sources 2002
Evidence of non-coincidence Between Radio and Optical Positions of ICRF Sources 2002
Non-coincidence between Radio and Optical Positions of ICRF Sources 2002
A Joint Collaboration Between USNO and Brazil on The Astrometry of ICRF Sources 2002
Different Approaches Used to Obtain Optical Positions from ICRF Sources 2002
An analysis of the Tycho2 Catalogue as Representation of the Hipparcos System 2002
Placing an Optical Frame in the ICRS System 2001
CCD Observations of ICRF Sources in the HIPPARCOS Frame 2000
CCD Positions of Extragalatic Radio Sources in the UCAC Catalogue System 2000
Optical Positions of Radio Stars Referred to Dense Catalogs on the HIPPARCOS Frame 2000
A Study on ICRF Optical Frames 2000
Astrometric CCD Positions of Extragalactic Radiosources from the Valinhos-LNA Program 2000
CCD Positions of Extragalatic Radio Sources in the UCAC Catalogue System 2000
A Biblioteca Virtual de Astronomia 1999
Formação em Técnicas Modernas de Observação e Redução de Dados em Astronomia e Astrofísica 1999
CCD Observations of ICRF Sources in the HIPPARCOS Frame 1999
Astrometric Reduction for Fields Observed at the Valinhos CCD Meridian Circle on the Neighborhood of Quasars 1999
Radio Stars Extension of the HIPPARCOS System 1999
Astrometric CCD Positions for Extragalactic Radiosources Using the USNO-A2.0 Catalogue 1999
Astrometric CCD Positions from the Valinhos-LNA Extragalactic Radiosource Program: First Results 1999
Astrometria para Uma Grande Amostra de Contrapartidas Óticas de Quasares 1998
Astrometria CCD de Radiofontes Extragalácticas no Referencial HIPPARCOS 1998
Posições Óticas de Rádio Estrelas no Referencial HIPPARCOS Definido pelo Catálogo TYCHO 1998
Redução Astrométrica de Campos de Quasares Obtidos com o Círculo Meridiano de Valinhos 1998
HIPPARCOS: Principais Características, Primeiros Resultados e Perspectivas Futuras 1998
Astrometry for A Sample of ICRS Radiosources 1998
Astrometria CCD de Radiofontes Extragaláticas com o HIPPARCOS 1998
Optical Positions of Radio Stars 1998
Satélites Astrométricos: Impacto na Astronomia e na Astrofísica 1998
Astrometric positions of Quasars by CCD observations 1997
ASTROMETRIC CCD POSITIONS FOR EXTRAGALATIC RADIOSOURCES 1997
A Study on the Non-coincidence Between Optical and Radio Centroids of Extragalactic Radiosources 1997
Astrometry of A Large Sample of optical Counterparts of Quasars 1997
Optical Positions of Radio Stars on the Twin Astrographic Catalogue Reference Frame 1997
LNA-Valinhos Astrometric Program of Extragalactic Radiosource Observations 1997
Astrometric CCD Positions for Extragalactic Radiosources - an Essay on THYCO-like Data Reduction 1997
Astrometric Observations of Faint Satellites 1996
O Programa de Rádio Estrelas no Círculo Meridiano de Valinhos 1996
Posições Astrométricas de Quasares com CCD 1996
Improved Light Curves for HIPPARCOS Cepheids - First Results 1996
A Catalogue of Positions, Proper Motions and BV Magnitudes of the Stars in the Field of the Galactic Cluster NGC 7243 1996
Optical Positions for a Dense Grid of Extragalactic Radio 1996
Astrometric Positions of Radio Emitting Stars 1996
Posições Astrométricas de 85 Quasares com CCD 1996
Astrographical Results from the Observatório Nacional Radio Star Programme 1995
Estudo dos Movimentos Próprios no Campo do Aglomerado Aberto NGC7243 1995
20 CCD Positions of Southern Quasars 1995
Reference Frames 1994
Determinação de Posições Astrométricas para Nereida 1994
Determinação de Posição de Radioestrelas 1994
Determinação de Posição de Quasares com CCD 1994
CCD Astrometry of Southern Quasars: Comparison with VLBI Positions 1993
Residuals from Catalogue Comparisons 1993
Astrometria de Quasares com CCD 1993
FK5 based Radio Stars'Positions 1992
Um Estudo de Modelos Polimoniais para Redução de Placas Astrográficas 1992
Posições Astrométricas de Quasares e Radioestrelas 1992
Posições Óticas de Quasares do Hemisfério Sul 1992
Modelo de Redução do Campo da Câmara Astrográfica da E.A.M.C. - II 1990
Posições Óticas Precisas para 11 Quasares com d < - 17.5 1990
Astrometria de Radiofontes Extragaláticas com Microdensitômetro PDS 1990
Determinação Precisa da Posição Ótica de Quasares do Hemisfério Sul 1988
Determinação de posições de Radiofontes Extragaláticas a partir do 'Eso B Survey' 1988
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