Bibcode
Popescu, Marcel; Licandro, J.; Morate, D.; de Leon, J.; Alin Nedelcu, Dan
Referencia bibliográfica
American Astronomical Society, DPS meeting #48, id.#510.07
Fecha de publicación:
10
2016
Número de citas
0
Número de citas referidas
0
Descripción
Using the observations performed by VISTA-VHS survey we obtained the
near-infrared colors of 35 000 minor planets. This survey uses Y, J, H,
and Ks filters to image the entire sky of the southern hemisphere. A
dedicated pipeline was developed to retrieve and process the
measurements corresponding to Solar System objects, which are stored in
three catalogues (available online): the detections catalogue - MOVIS-D,
the magnitudes catalogue - MOVIS-M, and the colors catalogue –
MOVIS-C.The analysis of the near-infrared color-color plots derived from
MOVIS-C data shows the large diversity of minor planets surfaces. The
patterns identified in the distribution of NIR colors correspond to
different taxonomic types. The color-color plots of the asteroids with
known spectral properties reveal the color intervals corresponding to
various compositional types. All the diagrams that use (Y-J) color
separate the spectral classes much better than it has been done until
now using the (J-H) vs (H-Ks) plots. Even for large color uncertainties
(<0.1) the plots (Y-J) vs. (Y-Ks) and (Y-J) vs. (J-Ks) clearly
separate the asteroids belonging to the main spectroscopic S- and
C-complexes and allow to identify the end-members A, D, R, and V types.