2.1k citations · 4k across the 41 of their papers we have counts for
41 papers
A Large Outburst, Coma Asymmetries, and the Color of Comet 243P/NEAT
Michael S. P. Kelley, Silvia Protopapa, Dennis Bodewits +16
Water ice is a fundamental building material of comets and other bodies in the outer solar system. Yet, the properties of cometary water ice are challenging to study, due to its vo…
The Extreme Activity in Comet Hale-Bopp (C/1995 O1): Investigations of Extensive, Narrowband Photoelectric Photometry
David G. Schleicher, Peter V. Birch, Tony L. Farnham +1
Conventional narrowband photoelectric photometry of Comet Hale-Bopp (1995 O1) was obtained on 99 nights from mid-1995 to early-2000, yielding gas and dust production rates over an…
Characterization of the ejecta from NASA/DART impact on Dimorphos: observations and Monte Carlo models
Fernando Moreno, Adriano Campo Bagatin, Gonzalo Tancredi +26
The NASA/DART (Double Asteroid Redirection Test) spacecraft successfully crashed on Dimorphos, the secondary component of the binary (65803) Didymos system. Following the impact, a…
Ejecta from the DART-produced active asteroid Dimorphos
Jian-Yang Li, Masatoshi Hirabayashi, Tony L. Farnham +61
Some active asteroids have been proposed to be the result of impact events. Because active asteroids are generally discovered serendipitously only after their tail formation, the p…
Comet P/2021 HS (PANSTARRS) and the Challenge of Detecting Low-Activity Comets
Quanzhi Ye, Michael S. P. Kelley, James M. Bauer +8
Jupiter-family comet (JFC) P/2021 HS (PANSTARRS) only exhibits a coma within a few weeks of its perihelion passage at 0.8~au, which is atypical for a comet. Here we present an inve…
Operating Spacecraft Around Comets: Evaluation of the Near-Nucleus Environment
C. M. Lisse, M. R. Combi, T. L. Farnham +9
We present a study of the current state of knowledge concerning spacecraft operations and potential hazards while operating near a comet nucleus. Starting from simple calculations…
Preview of Comet C/2021 A1 (Leonard) and Its Encounter with Venus
Qicheng Zhang, Quanzhi Ye, Shreyas Vissapragada +2
Long period comet C/2021 A1 (Leonard) will approach Venus to within 0.029 au on 2021 December 18 and may subsequently graze the planet with its dust trail less than two days later.…
Six Outbursts of Comet 46P/Wirtanen
Michael S. P. Kelley, Tony L. Farnham, Jian-Yang Li +32
Cometary activity is a manifestation of sublimation-driven processes at the surface of nuclei. However, cometary outbursts may arise from other processes that are not necessarily d…
Narrowband Observations of Comet 46P/Wirtanen During its Exceptional Apparition of 2018/19 II: Photometry, Jet Morphology, and Modeling Results
Matthew M. Knight, David G. Schleicher, Tony L. Farnham
We report on our extensive photometry and imaging of Comet 46P/Wirtanen during its 2018/19 apparition and use these data to constrain modeling of Wirtanen's activity. Narrowband ph…
Narrowband Observations of Comet 46P/Wirtanen During Its Exceptional Apparition of 2018/19 I: Apparent Rotation Period and Outbursts
Tony L. Farnham, Matthew M. Knight, David G. Schleicher +4
We obtained broadband and narrowband images of the hyperactive comet 46P/Wirtanen on 33~nights during its 2018/2019 apparition, when the comet made an historic close approach to th…
Recovery of Returning Halley-Type Comet 12P/Pons-Brooks With the Lowell Discovery Telescope
Quanzhi Ye, Tony L. Farnham, Matthew M. Knight +2
We report the recovery of returning Halley-type comet 12P/Pons-Brooks using the 4.3 m Lowell Discovery Telescope, at a heliocentric distance of 11.89 au. Comparative analysis with…
Detailed Characterization of Low Activity Comet 49P/Arend-Rigaux
Laurie E. U. Chu, Karen J. Meech, Tony L. Farnham +6
Comet 49P/Arend-Rigaux is a well known low-activity Jupiter Family comet. Despite the low activity, we have witnessed outgassing activity in 1992, 2004, and 2012. In 2012 a broad t…
First Results from TESS Observations of Comet 46P/Wirtanen
Tony L. Farnham, Michael S. P. Kelley, Matthew M. Knight +1
We report on initial results from 20 days' worth of TESS spacecraft observations of comet 46P/Wirtanen. The long-duration, high-cadence measurements show a 2018 September 26 outbur…
Comet 240P/NEAT is Stirring
Michael S. P. Kelley, Dennis Bodewits, Quanzhi Ye +13
Comets are primitive objects that formed in the protoplanetary disk, and have been largely preserved over the history of the Solar System. However, they are not pristine, and surfa…
Local manifestations of cometary activity
Jean-Baptiste Vincent, Tony Farnham, Ekkehard Kührt +5
Comets are made of volatile and refractory material and naturally experience various degrees of sublimation as they orbit around the Sun. This gas release, accompanied by dust, rep…
The Zwicky Transient Facility: Science Objectives
Matthew J. Graham, S. R. Kulkarni, Eric C. Bellm +114
The Zwicky Transient Facility (ZTF), a public-private enterprise, is a new time domain survey employing a dedicated camera on the Palomar 48-inch Schmidt telescope with a 47 deg$^2…
The Zwicky Transient Facility: System Overview, Performance, and First Results
Eric C. Bellm, Shrinivas R. Kulkarni, Matthew J. Graham +112
The Zwicky Transient Facility (ZTF) is a new optical time-domain survey that uses the Palomar 48-inch Schmidt telescope. A custom-built wide-field camera provides a 47 deg fiel…
A rapid decrease in the rotation rate of comet 41P/Tuttle-Giacobini-Kresák
Dennis Bodewits, Tony L. Farnham, Michael S. P. Kelley +1
Cometary outgassing can produce torques that change the spin state of the nucleus, influencing the evolution and lifetimes of comets (1,2). If these torques spin up the rotation to…
On the rotation period and shape of the hyperbolic asteroid 1I/`Oumuamua (2017) U1 from its lightcurve
Matthew M. Knight, Silvia Protopapa, Michael S. P. Kelley +5
We observed the newly discovered hyperbolic minor planet 1I/`Oumuamua (2017 U1) on 2017 October 30 with Lowell Observatory's 4.3-m Discovery Channel Telescope. From these observati…
Near-UV OH Prompt Emission in the Innermost Coma of 103P/Hartley 2
Fiorangela La Forgia, Dennis Bodewits, Michael F. A'Hearn +5
The Deep Impact spacecraft fly-by of comet 103P/Hartley 2 occurred on 2010 November 4, one week after perihelion with a closest approach (CA) distance of about 700 km. We used narr…
Solar system science with the Wide-Field InfraRed Survey Telescope (WFIRST)
B. J. Holler, S. N. Milam, J. M. Bauer +30
We present a community-led assessment of the solar system investigations achievable with NASA's next-generation space telescope, the Wide Field InfraRed Survey Telescope (WFIRST).…
Seasonal Evolution on the Nucleus of Comet C/2013 A1 (Siding Spring)
Jian-Yang Li, Nalin H. Samarasinha, Michael S. P. Kelley +6
We observed Comet C/Siding Spring using the Hubble Space Telescope (HST) during its close approach to Mars. The high spatial resolution images obtained through the F689M, F775W, an…
Results from the Worldwide Coma Morphology Campaign for Comet ISON (C/2012 S1)
Nalin H. Samarasinha, 48 co-authors
We present the results of a global coma morphology campaign for comet C/2012 S1 (ISON), which was organized to involve both professional and amateur observers. In response to the c…
Cometary Science with the James Webb Space Telescope
Michael S. P. Kelley, Charles E. Woodward, Dennis Bodewits +12
The James Webb Space Telescope (JWST), as the largest space-based astronomical observatory with near- and mid-infrared instrumentation, will elucidate many mysterious aspects of co…