RESULTS FROM THE 2014 NOVEMBER 15TH MULTI-CHORD STELLAR OCCULTATION BY THE TNO (229762) 2007 UK126

被引：29

作者：

Benedetti-Rossi, G. ^{[1
]}

Sicardy, B. ^{[2
]}

Buie, M. W. ^{[3
]}

Ortiz, J. L. ^{[4
]}

Vieira-Martins, R. ^{[1
,5
]}

Keller, J. M. ^{[6
]}

Braga-Ribas, F. ^{[7
]}

Camargo, J. I. B. ^{[1
,8
]}

Assafin, M. ^{[5
]}

Morales, N. ^{[4
]}

Duffard, R. ^{[4
]}

Dias-Oliveira, A. ^{[1
]}

Santos-Sanz, P. ^{[4
]}

Desmars, J. ^{[9
]}

Gomes-Junior, A. R.

Leiva, R. ^{[10
]}

Bardecker, J. ^{[11
,12
]}

Bean, J. K., Jr. ^{[12
]}

Olsen, A. M. ^{[11
]}

Ruby, D. W. ^{[12
,13
]}

Sumner, R. ^{[12
]}

Thirouin, A. ^{[14
]}

Gomez-Munoz, M. A. ^{[15
]}

Gutierrez, L. ^{[15
]}

Wasserman, L. ^{[14
]}

Charbonneau, D. ^{[16
]}

Irwin, J. ^{[16
]}

Levine, S. ^{[14
]}

Skiff, B. ^{[14
]}

机构：

[1] ON MCT&I, Rio De Janeiro, Brazil

[2] Univ Paris Diderot, Univ Pierre & Marie Curie, CNRS UMR 8109, LESIA,Observ Paris, Meudon, France

[3] Southwest Res Inst, Boulder, CO USA

[4] IAA CSIC, Apt 3004, E-18080 Granada, Spain

[5] OV UFRJ, Rio De Janeiro, Brazil

[6] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA

[7] Univ Tecnol Fed Parana, UTFPR DAFIS, Curitiba, PR, Brazil

[8] Lab Interinst & Astron LIneA, Rio De Janeiro, Brazil

[9] Univ Lille 1, Sorbonne Univ, PSL Res Univ, Observ Paris,IMCCE,CNRS,UPMC, F-75014 Paris, France

[10] Pontificia Univ Catlica Chile, Inst Astrofs, Fac Fsica, Santiago 7820436, Chile

[11] IOTA, Iota, LA USA

[12] RECON, Reno, NV USA

[13] Univ Nevada, Reno, NV 89557 USA

[14] Lowell Observ, 1400 W Mars Hill Rd, Flagstaff, AZ 86001 USA

[15] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City, DF, Mexico

[16] Harvard Smithsonian Ctr Astrophys, Cambridge, MA USA

来源：

ASTRONOMICAL JOURNAL | 2016年 / 152卷 / 06期

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

Kuiper belt objects: individual (229762; 2007; UK126); occultations; planets and satellites: fundamental parameters; OBJECTS; ALBEDO; RADIUS; PLANET; SYSTEM; PLUTO;

D O I：

10.3847/0004-6256/152/6/156

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results derived from the first multi-chord stellar occultation by the trans-Neptunian object (229762) 2007 UK126, observed on 2014 November 15. The event was observed by the Research and Education Collaborative Occultation Network project and International Occultation Timing Association collaborators throughout the United States. Use of two different data analysis methods obtain a satisfactory fit to seven chords, yielding an elliptical fit to the chords with an equatorial radius of = R 338(-10)(+15) km and equivalent radius of = Req 319(-7)(+14) km. A circular fit also gives a radius of = R 324(-23)(+30) km. Assuming that the object is a Maclaurin spheroid with indeterminate aspect angle, and using two published absolute magnitudes for the body, we derive possible ranges for geometric albedo between p(V) = 0.159(-0.013) (+ 0.007) and p(R) = 0.189(-0.015)(+0.009), and for the body oblateness between is an element of= 0.105 (-0.040) (+0.050) and is an element of= 0.118 (-0.048) (+0.055). For a nominal rotational period of 11.05 hr, an upper limit for density of rho = 1740 kg m(-3) is estimated for the body.

引用

页数：11

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