Photometric observations and modeling of asteroid 1620 Geographos

被引：26

作者：

Magnusson, P

Dahlgren, M

Barucci, MA

Jorda, L

Binzel, RP

Slivan, SM

Blanco, C

Riccioli, D

Buratti, BJ

Colas, F

Berthier, J

DeAngelis, G

DiMartino, M

Dotto, E

Drummond, JD

Fink, U

Hicks, M

Grundy, W

Wisniewski, W

Gaftonyuk, NM

Geyer, EH

Bauer, T

Hoffmann, M

Ivanova, V

Komitov, B

Donchev, Z

Denchev, P

Krugly, YN

Velichko, FP

Chiorny, VG

Lupishko, DF

Shevchenko, VG

Kwiatkowski, T

Kryszczynska, A

Lahulla, JF

Licandro, J

Mendez, O

Mottola, S

Erikson, A

Ostro, SJ

Pravec, P

Pych, W

Tholen, DJ

Whiteley, R

Wild, WJ

Wolf, M

Sarounova, L

机构：

[1] OBSERV PARIS,F-92195 MEUDON,FRANCE

[2] MIT,DEPT EARTH ATMOSPHER & PLANETARY SCI,CAMBRIDGE,MA 02139

[3] UNIV CATANIA,IST ASTRON,I-95125 CATANIA,ITALY

[4] CALTECH,JET PROP LAB,PASADENA,CA 91109

[5] BUR LONGITUDES,PARIS,FRANCE

[6] UNIV ROMA LA SAPIENZA,IST ASTRON,I-00161 ROME,ITALY

[7] ESA,ESRIN,INFORMAT SYST DIV,I-00044 FRASCATI,ITALY

[8] OSSERV ASTRON TORINO,I-10025 PINO TORINESE,ITALY

[9] USAF,PHILLIPS LAB,LIG,KIRTLAND AFB,NM 87117

[10] UNIV ARIZONA,LUNAR & PLANETARY LAB,TUCSON,AZ 85721

[11] ASTRON OBSERV,UA-334242 SIMEIZ,CRIMEA,UKRAINE

[12] UNIV BONN,OBSERV HOHER LIST,D-54550 DAUN,GERMANY

[13] BULGARIAN ACAD SCI,DEPT ASTRON,BU-1784 SOFIA,BULGARIA

[14] ASTRON OBSERV,UA-310022 KHARKOV,UKRAINE

[15] ADAM MICKIEWICZ UNIV POZNAN,ASTRON OBSERV,PL-60286 POZNAN,POLAND

[16] ASTRON OBSERV,E-28014 MADRID,SPAIN

[17] FAC CIENCIAS,INST FIS,DEPT ASTRON,MONTEVIDEO 11200,URUGUAY

[18] GERMAN AEROSP RES ESTAB,DLR,D-12489 BERLIN,GERMANY

[19] ACAD SCI CZECH REPUBL,INST ASTRON,CZ-25165 ONDREJOV,CZECH REPUBLIC

[20] WARSAW UNIV,ASTRON OBSERV,PL-00478 WARSAW,POLAND

[21] UNIV HAWAII,INST ASTRON,HONOLULU,HI 96822

[22] UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637

[23] CHARLES UNIV,INST ASTRON,CZ-15000 PRAGUE,CZECH REPUBLIC

来源：

ICARUS | 1996年 / 123卷 / 01期

基金：

美国国家航空航天局; 以色列科学基金会;

关键词：

D O I：

10.1006/icar.1996.0151

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Photometric observations of 1620 Geographos in 1993 and 1993 are presented and, in combination with previously published data, are used to derive models of Geographos, We estimate that the sidereal period of rotation is 0.21763860 +/- 0.00000003 days (5(h)13(m)23.975(s) +/- 0.0033(s)). The sense of rotation is retrograde, The ecliptic coordinates of the spin angular velocity vector are estimated to lambda(p) = 56 degrees +/- 6 degrees and beta(p) = -47 degrees +/- 4 degrees (equinox J2000.0), The lightcurve amplitudes are well-explained by an ellipsoidal model with axis ratios a/b 2.58 +/- 0.16 and b/c = 1.00 +/- 0.15. Models that have one or both ends more sharply pointed than the ellipsoid improve the fit to the observations. There are no significant indications of albedo variegation, but non-geometric scattering effects are tentatively suggested based on significant rotational color variation. (C) 1996 Academic Press, Inc.

引用

页码：227 / 244

页数：18

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