Spectrophotometric characterization of minor planets using VISTA-VHS survey - MOVIS catalog

Popescu, Marcel; Licandro, J.; Morate, D.; de Leon, J.; Alin Nedelcu, Dan
Bibliographical reference

American Astronomical Society, DPS meeting #48, id.#510.07

Advertised on:
10
2016
Number of authors
5
IAC number of authors
3
Citations
0
Refereed citations
0
Description
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.