Results of two multichord stellar occultations by dwarf planet (1) Ceres
We report the results of two multichord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. Four positive detections were obtained for the 2010 occultation, and nine for the 2013 occultation. Elliptical models were...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2015-08, Vol.451 (3), p.2295-2302 |
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| creator | Gomes-Júnior, A. R. Giacchini, B. L. Braga-Ribas, F. Assafin, M. Vieira-Martins, R. Camargo, J. I. B. Sicardy, B. Timerson, B. George, T. Broughton, J. Blank, T. Benedetti-Rossi, G. Brooks, J. Dantowitz, R. F. Dunham, D. W. Dunham, J. B. Ellington, C. K. Emilio, M. Herpich, F. R. Jacques, C. Maley, P. D. Mehret, L. Mello, A. J. T. Milone, A. C. Pimentel, E. Schoenell, W. Weber, N. S. |
| description | We report the results of two multichord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. Four positive detections were obtained for the 2010 occultation, and nine for the 2013 occultation. Elliptical models were adjusted to the observed chords to obtain Ceres’ size and shape. Two limb-fitting solutions were studied for each event. The first one is a nominal solution with an indeterminate polar aspect angle. The second one was constrained by the pole coordinates as given by Drummond et al. Assuming a Maclaurin spheroid, we determine an equatorial diameter of 972 ± 6 km and an apparent oblateness of 0.08 ± 0.03 as our best solution. These results are compared to all available size and shape determinations for Ceres made so far, and shall be confirmed by the NASA's Dawn space mission. |
| doi_str_mv | 10.1093/mnras/stv1081 |
| format | Article |
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R. ; Giacchini, B. L. ; Braga-Ribas, F. ; Assafin, M. ; Vieira-Martins, R. ; Camargo, J. I. B. ; Sicardy, B. ; Timerson, B. ; George, T. ; Broughton, J. ; Blank, T. ; Benedetti-Rossi, G. ; Brooks, J. ; Dantowitz, R. F. ; Dunham, D. W. ; Dunham, J. B. ; Ellington, C. K. ; Emilio, M. ; Herpich, F. R. ; Jacques, C. ; Maley, P. D. ; Mehret, L. ; Mello, A. J. T. ; Milone, A. C. ; Pimentel, E. ; Schoenell, W. ; Weber, N. S.</creator><creatorcontrib>Gomes-Júnior, A. R. ; Giacchini, B. L. ; Braga-Ribas, F. ; Assafin, M. ; Vieira-Martins, R. ; Camargo, J. I. B. ; Sicardy, B. ; Timerson, B. ; George, T. ; Broughton, J. ; Blank, T. ; Benedetti-Rossi, G. ; Brooks, J. ; Dantowitz, R. F. ; Dunham, D. W. ; Dunham, J. B. ; Ellington, C. K. ; Emilio, M. ; Herpich, F. R. ; Jacques, C. ; Maley, P. D. ; Mehret, L. ; Mello, A. J. T. ; Milone, A. C. ; Pimentel, E. ; Schoenell, W. ; Weber, N. S.</creatorcontrib><description>We report the results of two multichord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. Four positive detections were obtained for the 2010 occultation, and nine for the 2013 occultation. Elliptical models were adjusted to the observed chords to obtain Ceres’ size and shape. Two limb-fitting solutions were studied for each event. The first one is a nominal solution with an indeterminate polar aspect angle. The second one was constrained by the pole coordinates as given by Drummond et al. Assuming a Maclaurin spheroid, we determine an equatorial diameter of 972 ± 6 km and an apparent oblateness of 0.08 ± 0.03 as our best solution. These results are compared to all available size and shape determinations for Ceres made so far, and shall be confirmed by the NASA's Dawn space mission.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stv1081</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Astronomical instruments ; Astronomy ; Astrophysics ; Brazil ; Dwarf planets ; Dwarf stars ; Mathematical models ; NASA ; Occultation ; Physics ; Planets ; Space exploration ; Spheroids ; Stellar occultation</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2015-08, Vol.451 (3), p.2295-2302</ispartof><rights>2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society 2015</rights><rights>Copyright Oxford University Press, UK Aug 11, 2015</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c437t-803d6f5c135116b20c70253be92e709524a1c312dfa9273a31835051e5cf2a173</citedby><cites>FETCH-LOGICAL-c437t-803d6f5c135116b20c70253be92e709524a1c312dfa9273a31835051e5cf2a173</cites><orcidid>0000-0002-8211-0777 ; 0000-0002-4106-476X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,1604,27924,27925</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/mnras/stv1081$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc><backlink>$$Uhttps://hal.science/hal-02483395$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Gomes-Júnior, A. R.</creatorcontrib><creatorcontrib>Giacchini, B. L.</creatorcontrib><creatorcontrib>Braga-Ribas, F.</creatorcontrib><creatorcontrib>Assafin, M.</creatorcontrib><creatorcontrib>Vieira-Martins, R.</creatorcontrib><creatorcontrib>Camargo, J. I. B.</creatorcontrib><creatorcontrib>Sicardy, B.</creatorcontrib><creatorcontrib>Timerson, B.</creatorcontrib><creatorcontrib>George, T.</creatorcontrib><creatorcontrib>Broughton, J.</creatorcontrib><creatorcontrib>Blank, T.</creatorcontrib><creatorcontrib>Benedetti-Rossi, G.</creatorcontrib><creatorcontrib>Brooks, J.</creatorcontrib><creatorcontrib>Dantowitz, R. F.</creatorcontrib><creatorcontrib>Dunham, D. W.</creatorcontrib><creatorcontrib>Dunham, J. B.</creatorcontrib><creatorcontrib>Ellington, C. K.</creatorcontrib><creatorcontrib>Emilio, M.</creatorcontrib><creatorcontrib>Herpich, F. R.</creatorcontrib><creatorcontrib>Jacques, C.</creatorcontrib><creatorcontrib>Maley, P. D.</creatorcontrib><creatorcontrib>Mehret, L.</creatorcontrib><creatorcontrib>Mello, A. J. T.</creatorcontrib><creatorcontrib>Milone, A. C.</creatorcontrib><creatorcontrib>Pimentel, E.</creatorcontrib><creatorcontrib>Schoenell, W.</creatorcontrib><creatorcontrib>Weber, N. S.</creatorcontrib><title>Results of two multichord stellar occultations by dwarf planet (1) Ceres</title><title>Monthly notices of the Royal Astronomical Society</title><description>We report the results of two multichord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. Four positive detections were obtained for the 2010 occultation, and nine for the 2013 occultation. Elliptical models were adjusted to the observed chords to obtain Ceres’ size and shape. Two limb-fitting solutions were studied for each event. The first one is a nominal solution with an indeterminate polar aspect angle. The second one was constrained by the pole coordinates as given by Drummond et al. Assuming a Maclaurin spheroid, we determine an equatorial diameter of 972 ± 6 km and an apparent oblateness of 0.08 ± 0.03 as our best solution. These results are compared to all available size and shape determinations for Ceres made so far, and shall be confirmed by the NASA's Dawn space mission.</description><subject>Astronomical instruments</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Brazil</subject><subject>Dwarf planets</subject><subject>Dwarf stars</subject><subject>Mathematical models</subject><subject>NASA</subject><subject>Occultation</subject><subject>Physics</subject><subject>Planets</subject><subject>Space exploration</subject><subject>Spheroids</subject><subject>Stellar occultation</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkUFLAzEQhYMoWKtH7wEv7WFtJrPZTY6lqBUKgug5pGmWbtluarLb0n_v1hYFL3oa5vExvDePkFtg98AUjtZ1MHEUmy0wCWekB5iJhKssOyc9xlAkMge4JFcxrhhjKfKsR6avLrZVE6kvaLPzdN0tpV36sKCxcVVlAvXWdqJpSl9HOt_Txc6Egm4qU7uGDmBIJy64eE0uClNFd3OaffL--PA2mSazl6fnyXiW2BTzJpEMF1khLKAAyOac2ZxxgXOnuMuZEjw1YBH4ojCK52gQJAomwAlbcAM59snweHdpKr0J5dqEvfam1NPxTB80xlOJqMQWOnZwZDfBf7QuNnpdRntIVTvfRg05SCVyhOwfKINUSlSyQ-9-oSvfhroLrSFTIoW0e39HJUfKBh9jcMW3WWD6UJf-qkuf6vox4NvNH-gnzaSUEQ</recordid><startdate>20150811</startdate><enddate>20150811</enddate><creator>Gomes-Júnior, A. 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S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Results of two multichord stellar occultations by dwarf planet (1) Ceres</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2015-08-11</date><risdate>2015</risdate><volume>451</volume><issue>3</issue><spage>2295</spage><epage>2302</epage><pages>2295-2302</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>We report the results of two multichord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. Four positive detections were obtained for the 2010 occultation, and nine for the 2013 occultation. Elliptical models were adjusted to the observed chords to obtain Ceres’ size and shape. Two limb-fitting solutions were studied for each event. The first one is a nominal solution with an indeterminate polar aspect angle. The second one was constrained by the pole coordinates as given by Drummond et al. Assuming a Maclaurin spheroid, we determine an equatorial diameter of 972 ± 6 km and an apparent oblateness of 0.08 ± 0.03 as our best solution. These results are compared to all available size and shape determinations for Ceres made so far, and shall be confirmed by the NASA's Dawn space mission.</abstract><cop>London</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/stv1081</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-8211-0777</orcidid><orcidid>https://orcid.org/0000-0002-4106-476X</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Astronomical instruments Astronomy Astrophysics Brazil Dwarf planets Dwarf stars Mathematical models NASA Occultation Physics Planets Space exploration Spheroids Stellar occultation |
| title | Results of two multichord stellar occultations by dwarf planet (1) Ceres |
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