2010A&A...521A..35D


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET23:43:00

2010A&A...521A..35D - Astronomy and Astrophysics, volume 521, A35-35 (2010/10-1)

A spectroscopic analysis of jupiter-coupled object (52872) Okyrhoe, and TNOs (90482) Orcus and (73480) 2002 PN34.

DEMEO F.E., BARUCCI M.A., MERLIN F., GUILBERT-LEPOUTRE A., ALVAREZ-CANDAL A., DELSANTI A., FORNASIER S. and DE BERGH C.

Abstract (from CDS):

We present new visible and near-infrared photometric measurements and near-infrared spectroscopic measurements for three outer solar system small bodies, the Jupiter-coupled object (52872) Okyrhoe and the TNOs (90482) Orcus and (73480) 2002 PN34. We analyzed their surface compositions by modeling their spectra in the visible and near-infrared wavelength ranges. We then compared this new data with previous measurements of Okyrhoe and Orcus to search for heterogeneity on their surfaces. All observations were performed at the European Southern Observatory 8 m Very Large Telescope, UT1 and UT4 at the Paranal Observatory in Chile. We find varying amounts of H2O ice among these bodies, Okyrhoe shows no trace of it in our spectrum, 73480 has small amounts, and Orcus has large quantities. While we do clearly see for Orcus that a significant fraction of the H2O ice is in crystalline form from the 1.65-µm feature, we cannot detect the 2.21-µm feature supposedly due to ammonia hydrate, because of the low signal-to-noise of the data. We also do not see any indication of ices more volatile than H2O, such as CH4 or CO2, in the spectrum, so we limit their presence to no more than about 5% based on the data presented here and on high-quality data from Barucci et al. (2008A&A...479L..13B).

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - techniques: photometric - Kuiper belt objects: individual: glutag{Viz.MP 52872 |(52872) Okyrhoe} - Kuiper belt objects: individual: glutag{Viz.MP 90482 |Orcus} - Kuiper belt objects: individual: glutag{Viz.MP 73480| 2002 PN34}

Simbad objects: 3

goto Full paper

goto View the reference in ADS

Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 80960 * 09 22 19.6517821411 -22 35 17.692231284   9.93 9.33     G3V 11 0
2 BD+00 2717 * 10 57 04.0449104240 -00 13 12.886842194 10.822 10.567 9.903 9.537 9.206 ~ 52 0
3 BD-00 4557 PM* 23 42 41.8263315718 +00 45 13.136892747 10.411 10.305 9.693 9.339 8.991 F8 47 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2010A&A...521A..35D and select 'bookmark this link' or equivalent in the popup menu


2019.11.21-23:43:00

© Université de Strasbourg/CNRS

    • Contact