E-Type Asteroid (2867) Steins as Imaged by OSIRIS on Board Rosetta
H. U. Keller
(1)
,
C. Barbieri
(2)
,
D. Koschny
(3)
,
Philippe Lamy
(4)
,
H. Rickman
,
R. Rodrigo
(5)
,
H. Sierks
(1)
,
Michael F. A'Hearn
(6)
,
F. Angrilli
(2)
,
M. A. Barucci
(7, 8)
,
Jean-Loup Bertaux
(9)
,
Gabriele Cremonese
(2, 10)
,
V. da Deppo
,
B. Davidsson
(11)
,
M. de Cecco
(2)
,
S. Debei
(2)
,
S. Fornasier
(7, 8)
,
M. Fulle
(12)
,
O. Groussin
(4)
,
P. J. Gutierrez
(5)
,
S. F. Hviid
(1)
,
W.-H. Ip
(13)
,
L. Jorda
(4)
,
J. Knollenberg
(14)
,
J. R. Kramm
(1)
,
Ekkehard Kührt
(14)
,
M. Küppers
(15)
,
L.-M. Lara
(5)
,
M. Lazzarin
(2)
,
J. Lopez Moreno
(5)
,
F. Marzari
(2)
,
H. Michalik
(16)
,
G. Naletto
(2)
,
L. Sabau
(17)
,
Nicolas Thomas
(18)
,
K.-P. Wenzel
(3)
,
I. Bertini
(5)
,
S. Besse
(4)
,
F. Ferri
(2)
,
M. Kaasalainen
(19)
,
S. Lowry
(20)
,
S. Marchi
(2)
,
S. Mottola
(14)
,
W. Sabolo
(5)
,
S. E. Schröder
(1)
,
S. Spjuth
(1)
,
P. Vernazza
(3)
1
MPS -
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
2 Dipartimento di Astronomia [Padova]
3 ESTEC - European Space Research and Technology Centre
4 LAM - Laboratoire d'Astrophysique de Marseille
5 IAA - Instituto de Astrofísica de Andalucía
6 Department of Astronomy [College Park]
7 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
8 OP - Observatoire de Paris - Site de Paris
9 PLANETO - LATMOS
10 OAPD - INAF - Osservatorio Astronomico di Padova
11 Department of Physics and Astronomy [Uppsala]
12 SISSA / ISAS - Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies
13 NCU - National Central University [Taiwan]
14 DLR - German Aerospace Center
15 ESAC - European Space Astronomy Centre
16 IDA - Institute of Computer and Network Engineering [Braunschweig]
17 INTA - Instituto Nacional de Técnica Aeroespacial
18 Physikalisches Institut [Bern]
19 TUT - Tampere University of Technology [Tampere]
20 University of Kent [Canterbury]
2 Dipartimento di Astronomia [Padova]
3 ESTEC - European Space Research and Technology Centre
4 LAM - Laboratoire d'Astrophysique de Marseille
5 IAA - Instituto de Astrofísica de Andalucía
6 Department of Astronomy [College Park]
7 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
8 OP - Observatoire de Paris - Site de Paris
9 PLANETO - LATMOS
10 OAPD - INAF - Osservatorio Astronomico di Padova
11 Department of Physics and Astronomy [Uppsala]
12 SISSA / ISAS - Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies
13 NCU - National Central University [Taiwan]
14 DLR - German Aerospace Center
15 ESAC - European Space Astronomy Centre
16 IDA - Institute of Computer and Network Engineering [Braunschweig]
17 INTA - Instituto Nacional de Técnica Aeroespacial
18 Physikalisches Institut [Bern]
19 TUT - Tampere University of Technology [Tampere]
20 University of Kent [Canterbury]
H. Rickman
- Fonction : Auteur
V. da Deppo
- Fonction : Auteur
L. Jorda
- Fonction : Auteur
- PersonId : 746464
- IdHAL : laurent-jorda
- ORCID : 0000-0001-8735-3308
- IdRef : 180975161
Nicolas Thomas
- Fonction : Auteur
- PersonId : 757031
- ORCID : 0000-0002-0146-0071
S. Marchi
- Fonction : Auteur
- PersonId : 801836
- ORCID : 0000-0003-2548-3291
P. Vernazza
- Fonction : Auteur
- PersonId : 738592
- IdHAL : pierre-vernazza
- ORCID : 0000-0002-2564-6743
- IdRef : 112732976
Résumé
The European Space Agency's Rosetta mission encountered the main-belt asteroid (2867) Steins while on its way to rendezvous with comet 67P/Churyumov-Gerasimenko. Images taken with the OSIRIS (optical, spectroscopic, and infrared remote imaging system) cameras on board Rosetta show that Steins is an oblate body with an effective spherical diameter of 5.3 kilometers. Its surface does not show color variations. The morphology of Steins is dominated by linear faults and a large 2.1-kilometer-diameter crater near its south pole. Crater counts reveal a distinct lack of small craters. Steins is not solid rock but a rubble pile and has a conical appearance that is probably the result of reshaping due to Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) spin-up. The OSIRIS images constitute direct evidence for the YORP effect on a main-belt asteroid.