Constraining Albedo And Composition Of Potentially-Hazardous Asteroids 2004 XP14 And (100085) 1992 UY4 Via Near-IR Spectroscopy

Details Constraining Albedo And Composition Of Potentially-Hazardous Asteroids 2004 XP14 And (100085) 1992 UY4 Via Near-IR Spectroscopy Constraining Albedo And Composition Of Potentially-Hazardous Asteroids 2004 XP14 And (100085) 1992 UY4 Via Near-IR Spectroscopy

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.6808r&link_type=abstract

American Astronomical Society, DPS meeting #38, #68.08; Bulletin of the American Astronomical Society, Vol. 38, p.621

Astronomy and Astrophysics

Astronomy

Scientific paper

Near-infrared spectroscopic observations of potentially-hazardous asteroids (PHAs) 2004 XP14 were obtained on July 5, 2006 and 1992 UY4 on July 31, 2005, using the SpeX instrument at NASA IRTF on Mauna Kea, Hawai'i. Near-IR spectrum of 2004 XP14 has a neutral slope and shows no detectable absorption features. Given its heliocentric distance (1.02 A.U.), a sharp rise in reflectance beyond 2.0-µm due to thermal emission would be expected if the PHA was a low albedo object. No such excess was detected in the spectrum of 2004 XP14 which establishes a lower limit on the albedo. Using Standard Thermal Model and methods developed by Abell (2003), we estimate the lower limit on the albedo to be 20%. A high albedo (>20%) featureless spectrum suggests that 2004 XP14 belongs to the M- or E-type taxonomic class. 1992 UY4 spectrum also shows no detectable absorption features but exhibits a sharp rise in reflectance beyond 2.0-µm due to thermal emission at its heliocentric distance (1.08 A.U.) at the time of observation. Using the same methods, we estimate the albedo from thermal emission to be 6.0±1; %. Based on albedo, the estimated diameter (Flower & Chillemi, 1992) is 1.8±0.2 km, given the limitations in the STM model. We suggest that 1992 UY4 is a dark object with significant low-albedo absorbing species like carbon in its surface assemblage, given its featureless spectrum and 6.0±1; % albedo. The authors would like to thank NASA IRTF for providing Target of Opportunity observing time for observing 2004 XP14 flyby. This research was supported by NASA Near-Earth Objects Observations Program grant NNG04GI17G.

Affiliated with

Also associated with

No associations

Rating

Constraining Albedo And Composition Of Potentially-Hazardous Asteroids 2004 XP14 And (100085) 1992 UY4 Via Near-IR Spectroscopy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Constraining Albedo And Composition Of Potentially-Hazardous Asteroids 2004 XP14 And (100085) 1992 UY4 Via Near-IR Spectroscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining Albedo And Composition Of Potentially-Hazardous Asteroids 2004 XP14 And (100085) 1992 UY4 Via Near-IR Spectroscopy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1078172