LIMITS ON QUAOAR'S ATMOSPHERE

@article{Fraser2013LIMITSOQ,
  title={LIMITS ON QUAOAR'S ATMOSPHERE},
  author={Wesley C. Fraser and Chadwick A. Trujillo and Andrew W. Stephens and Germ{\'a}n Gimeno and Michael E. Brown and Stephen D. J. Gwyn and J. J. Kavelaars},
  journal={The Astrophysical Journal},
  year={2013},
  volume={774}
}
Here we present high cadence photometry taken by the Acquisition Camera on Gemini South, of a close passage by the ~540 km radius Kuiper belt object, (50000) Quaoar, of a r' = 20.2 background star. Observations before and after the event show that the apparent impact parameter of the event was 0."019 ± 0."004, corresponding to a close approach of 580 ± 120 km to the center of Quaoar. No signatures of occultation by either Quaoar's limb or its potential atmosphere are detectable in the relative… 

Figures from this paper

New Constraint on the Atmosphere of (50000) Quaoar from a Stellar Occultation
We report observations of a stellar occultation by the classical Kuiper belt object (50000) Quaoar occurred on 28 June 2019. A single-chord high-cadence (2 Hz) photometry dataset was obtained with
(50000) Quaoar: Surface composition variability
Aims. The goal of this work is to investigate the composition of the surface of (50000) Quaoar and its spatial variability. Methods. We present new continuous spectra from the visible to near-IR
Size and Shape Constraints of (486958) Arrokoth from Stellar Occultations
We present the results from four stellar occultations by (486958) Arrokoth, the flyby target of the New Horizons extended mission. Three of the four efforts led to positive detections of the body,
THE SIZE, SHAPE, ALBEDO, DENSITY, AND ATMOSPHERIC LIMIT OF TRANSNEPTUNIAN OBJECT (50000) QUAOAR FROM MULTI-CHORD STELLAR OCCULTATIONS
Fil: Braga Ribas, F.. Ministerio de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil; . Laboratoire d;
When Stars Wink Out
It began with Aristotle. After sunset on May 4th in 357 BCE one of antiquity’s most influential philosophers watched the planet Mars disappear behind the Moon. His view is simulated in Fig. 20.1.

References

SHOWING 1-10 OF 21 REFERENCES
Pluto's atmosphere
A SEARCH FOR OCCULTATIONS OF BRIGHT STARS BY SMALL KUIPER BELT OBJECTS USING MEGACAM ON THE MMT
We conducted a search for occultations of bright stars by Kuiper Belt Objects (KBOs) to estimate the density of subkilometer KBOs in the sky. We report here the first results of this occultation
Rotational brightness variations in Trans-Neptunian Object 50000 Quaoar
Time-resolved broad-band CCD photometry of Trans-Neptunian Object 50000 Quaoar carried out using the 1.5 m telescope at Sierra Nevada Observatory is presented. The lightcurve reveals short-term
The mass, orbit, and tidal evolution of the Quaoar–Weywot system
Physical Properties of Kuiper Belt and Centaur Objects: Constraints from the Spitzer Space Telescope
Detecting heat from minor planers in the outer solar system is challenging, yet it is the most efficient means for constraining the albedos and sizes of Kuiper belt objects (KBOs) and their progeny,
Occultation evidence for an atmosphere on Pluto
On 9 June 1988, Pluto occulted a 12th magnitude star1. Several observations of the occultation were obtained from Australia, New Zealand, and the south Pacific2 and indicated that the initial decline
Atmospheric Structure and Composition
Titan's atmosphere is predominantly N2 with CH4 the next most abundant molecule. It has a mole fraction of 0.05 just above the surface decreasing to 0.014 in the stratosphere. Above the homopause
THE SURFACE COMPOSITION OF LARGE KUIPER BELT OBJECT 2007 OR10
We present photometry and spectra of the large Kuiper belt object 2007 OR10. The data show significant near-infrared absorption features due to water ice. While most objects in the Kuiper belt with
METHANE AND NITROGEN ABUNDANCES ON PLUTO AND ERIS
We present spectra of Eris from the MMT 6.5 m Telescope and Red Channel Spectrograph (5700-9800 A, 5 A pixel–1) on Mt. Hopkins, AZ, and of Pluto from the Steward Observatory 2.3 m Telescope and
...
1
2
3
...