Orbital mechanics ≈ Orbital mechanics
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The Eccentric Kozai-Lidov Effect and Its Applications Open
The hierarchical triple-body approximation has useful applications to a variety of systems from planetary and stellar scales to supermassive black holes. In this approximation, the energy of each orbit is separately conserved, and therefor…
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NASA's Black Marble nighttime lights product suite Open
NASA's Black Marble nighttime lights product suite (VNP46) is available at 500m resolution since January 2012 \nwith data from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi \nNational Polar-or…
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Imaging X-ray Polarimetry Explorer: prelaunch Open
Launched on 2021 December 9, the Imaging X-ray Polarimetry Explorer (IXPE) is a NASA Small Explorer Mission in collaboration with the Italian Space Agency (ASI). The mission will open a new window of investigation—imaging x-ray polarimetry…
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The Orbital Eccentricity of Small Planet Systems Open
We determine the orbital eccentricities of individual small Kepler planets, through a combination of asteroseismology and transit light-curve analysis. We are able to constrain the eccentricities of 51 systems with a single transiting plan…
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RadCalNet: A Radiometric Calibration Network for Earth Observing Imagers Operating in the Visible to Shortwave Infrared Spectral Range Open
Vicarious calibration approaches using in situ measurements saw first use in the early 1980s and have since improved to keep pace with the evolution of the radiometric requirements of the sensors that are being calibrated. The advantage of…
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Orbitronics: Orbital currents in solids Open
In solids, electronic Bloch states are formed by atomic orbitals. While it is natural to expect that orbital composition and information about Bloch states can be manipulated and transported, in analogy to the spin degree of freedom extens…
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The wide-field multiband imaging and slitless spectroscopy survey to be carried out by the Survey Space Telescope of China Manned Space Program Open
The 2 m-aperture Survey Space Telescope (also known as the China Space Station Telescope, CSST) is a major science project of China Manned Space Program. It is expected to start science operations around 2024 and has a nominal mission life…
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Robotic Manipulation and Capture in Space: A Survey Open
Space exploration and exploitation depend on the development of on-orbit robotic capabilities for tasks such as servicing of satellites, removing of orbital debris, or construction and maintenance of orbital assets. Manipulation and captur…
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Finding binaries from phase modulation of pulsating stars with Kepler: V. Orbital parameters, with eccentricity and mass-ratio distributions of 341 new binaries Open
The orbital parameters of binaries at intermediate periods (102-103 d) are difficult to measure with conventional methods and are very incomplete. We have undertaken a new survey, applying our pulsation timing method to Kepler light curves…
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Predicting the long-term stability of compact multiplanet systems Open
Significance Observations of planets beyond our solar system (exoplanets) yield uncertain orbital parameters. Particularly in compact multiplanet systems, a significant fraction of observationally inferred orbital configurations can lead t…
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Advanced Passive Thermal Control Materials and Devices for Spacecraft: A Review Open
In recent planetary exploration space missions, spacecraft are exposed to severe thermal environments that are sometimes more extreme than those experienced in earth orbits. The development of advanced thermal control materials and devices…
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Constraining the orbital eccentricity of inspiralling compact binary systems with Advanced LIGO Open
The detection of ~50 coalescing compact binaries with the Advanced LIGO and Virgo detectors has allowed us to test general relativity, constrain merger rates, and look for evidence of tidal effects, compact object spins, higher waveform mo…
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CORRALLING A DISTANT PLANET WITH EXTREME RESONANT KUIPER BELT OBJECTS Open
The four longest period Kuiper Belt objects have orbital periods close to integer ratios with each other. A hypothetical planet with an orbital period of ∼17,117 years and a semimajor axis ∼665 au would have N /1 and N /2 period ratios wit…
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Evolution of small-mass-ratio binaries with a spinning secondary Open
We calculate the evolution and gravitational-wave emission of a spinning\ncompact object inspiraling into a substantially more massive (non-rotating)\nblack hole. We extend our previous model for a non-spinning binary [Phys. Rev.\nD 93, 06…
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Mitigation of LEO Satellite Brightness and Trail Effects on the Rubin Observatory LSST Open
We report studies on the mitigation of optical effects of bright low-Earth-orbit (LEO) satellites on Vera C. Rubin Observatory and its Legacy Survey of Space and Time (LSST). These include options for pointing the telescope to avoid satell…
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Advances in optical engineering for future telescopes Open
Significant optical engineering advances at the University of Arizona are being made for design, fabrication, and construction of next generation astronomical telescopes. This summary review paper focuses on the technological advances in t…
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Assessment of S-NPP VIIRS On-Orbit Radiometric Calibration and Performance Open
The VIIRS instrument on board the S-NPP spacecraft has successfully operated for more than four years since its launch in October 2011. Many VIIRS environmental data records (EDR) have been continuously generated from its sensor data recor…
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Arcus: the x-ray grating spectrometer explorer Open
Arcus will be proposed to the NASA Explorer program as a free-flying satellite mission that will enable high-resolution soft X-ray spectroscopy (8-50Å) with unprecedented sensitivity - effective areas of > 500 sq cm and spectral resolution…
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Assessing the impact of transient orbital resonances Open
One of the primary sources for the future space-based gravitational wave\ndetector, the Laser Interferometer Space Antenna, are the inspirals of small\ncompact objects into massive black holes in the centres of galaxies. The\ngravitational…
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Numerical Solutions for the Orbital Motion of the Solar System over the Past 100 Myr: Limits and New Results* Open
I report results from accurate numerical integrations of solar system orbits over the past 100 Myr with the integrator package HNBody . The simulations used different integrator algorithms, step sizes, and initial conditions, and included …
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Achievement of the Planetary Defense Investigations of the Double Asteroid Redirection Test (DART) Mission Open
NASA's Double Asteroid Redirection Test (DART) mission was the first to demonstrate asteroid deflection, and the mission's Level 1 requirements guided its planetary defense investigations. Here, we summarize DART's achievement of those req…
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Pilot-wave dynamics in a harmonic potential: Quantization and stability of circular orbits Open
We present the results of a theoretical investigation of the dynamics of a droplet walking on a vibrating fluid bath under the influence of a harmonic potential. The walking droplet's horizontal motion is described by an integro-differenti…
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Eccentricity distribution of wide low-mass binaries Open
Distribution of eccentricities of very wide (up to 10 kau) low-mass binaries in the solar neighbourhood is studied using the catalogue of El-Badry and Rix (2018) based on Gaia. Direction and speed of relative motions in wide pairs contain …
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Evaluating the Dynamical Stability of Outer Solar System Objects in the Presence of Planet Nine Open
We evaluate the dynamical stability of a selection of outer solar system objects in the presence of the proposed new solar system member Planet Nine. We use a Monte Carlo suite of numerical N -body integrations to construct a variety of or…
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Orbital stability of coplanar two-planet exosystems with high eccentricities Open
The long-term stability of the evolution of two-planet systems is considered by using the general three body problem (GTBP). Our study is focused on the stability of systems with adjacent orbits when at least one of them is highly eccentri…
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The Moon as a Climate-Quality Radiometric Calibration Reference Open
On-orbit calibration requirements for a space-based climate observing system include long-term sensor response stability and reliable inter-calibration of multiple sensors, both contemporaneous and in succession. The difficulties with achi…
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Solar radiation pressure resonances in Low Earth Orbits Open
The aim of this work is to highlight the crucial role that orbital resonances\nassociated with solar radiation pressure can have in Low Earth Orbit. We review\nthe corresponding literature, and provide an analytical tool to estimate the\nm…
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Predictions for the Dynamical States of the Didymos System before and after the Planned DART Impact Open
NASA’s Double Asteroid Redirection Test (DART) spacecraft is planned to impact the natural satellite of (65803) Didymos, Dimorphos, at around 23:14 UTC on 2022 September 26, causing a reduction in its orbital period that will be measurable…
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Extension of Earth-Moon libration point orbits with solar sail propulsion Open
This paper presents families of libration point orbits in the Earth-Moon system that originate from complementing the classical circular restricted three-body problem with a solar sail. Through the use of a differential correction scheme i…
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Development of the Chinese Space-Based Radiometric Benchmark Mission LIBRA Open
Climate observations and their applications require measurements with high stability and low uncertainty in order to detect and assess climate variability and trends. The difficulty with space-based observations is that it is generally not…