LCO Outbursting Objects Key (LOOK) Project

June 30, 2021
We are interested in determining the frequency and nature of outbursts on small bodies across the Solar System. The LCO Outbursting Objects Key (LOOK) Project has two main objectives: 1) We will use the telescopes of the LCO Network to systematically monitor a sample of Dynamically New Comets (from the Oort cloud) over the whole sky. By studying this population's brightness and morphology changes as they pass through the inner Solar System, we can assess their evolutionary state (primitive vs. processed), identify targets for immediate or future follow-up (e.g., outburst vs. ambient coma composition), and, ultimately, better understand the behavior of these distant members as remnants of the early formation of the Solar System. It will also allow us to optimize the science return of the ESA Comet Interceptor mission and other future missions and gain a greater understanding of the interstellar objects that are just beginning to be discovered. 2) We will use the alerts and other data from the existing sky surveys such as ZTF, PanSTARRS1 & 2, Catalina and ATLAS to search for outburst activity in small bodies (comets, asteroids, centaurs) and rapidly respond to these outbursts with the telescopes of the LCO Network. This will enable us to better understand the nature of the outburst process, their frequency and magnitude distribution, and its evolution with time. Moreover, this will allow us to gain a better understanding of the physics of activity and outbursts on small bodies and the distribution of volatiles across the Solar System. This program exploits the synergy between current and future wide field surveys such as ZTF, PanSTARRS and LSST and rapid-response telescope networks such as LCO. Techniques, data reduction and analysis software developed during this Key Project and implemented on the ZTF survey and previous LCO programs will be an excellent “scale model” and testbed for what will be needed for the much larger number of objects coming from LSST. We've also teamed up with the Faulkes Telescope Project's Comet Chasers educational outreach program to provide a source of interesting targets for school children to follow up.

Gallery

Collaborators

We have a large team of cometary, outer solar system, and asteroidal experts, primarily derived from the LSST Solar System Science Collaboration's Active Objects Working Group and the Comet Interceptor Ground-based Observer Team.

Michele T. Bannister

University of Canterbury, NZ

Team Comet
Team Centaur

James Bauer

University of Maryland

Team Comet
Team Centaur

Dennis Bodewits

Auburn University

Team Comet

Joseph Chatelain

Las Cumbres Observatory

Team Asteroid

Matthew Dobson

Queen's University Belfast

Team Centaur
Student

Estela Fernández-Valenzuela

University of Central Florida

Team Asteroid

Daniel Gardener

University of Edinburgh

Team Comet
Student

Geza Gyuk

Adler Planetarium

Team Asteroid

Mark Hammergren

Farther Horizons LLC

Team Asteroid

Carrie Holt

Las Cumbres Observatory

Team Comet

Henry Hsieh

Planetary Science Institute

Team Comet
Team Asteroid

Man-To Hui

University of Hawaii/Macau University of Science and Technology

Team Comet
Team Asteroid

Emmanuel Jehin

University of Liège

Team Comet

Michael S. P. Kelley

University of Maryland

Co-PI
Team Comet

Matthew Knight

US Naval Academy

Team Comet

Rosita Kokotanekova

European Southern Observatory

Team Comet
Team Centaur

Eva Lilly

Planetary Science Institute

Team Centaur

Tim Lister

Las Cumbres Observatory

Co-PI
Team Comet
Team Centaur
Team Asteroid

Adam McKay

Appalachian State University

Team Comet

Youssef Moulane

Auburn University

Team Comet

Cyrielle Opitom

University of Edinburgh

Team Comet

Silvia Protopapa

Southwest Research Institute

Team Comet

Ryan Ridden-Harper

University of Canterbury, NZ

Team Centaur
Team Comet

Charles Schambeau

University of Central Florida

Team Comet
Team Centaur

Megan Schwamb

Queen's University Belfast

Team Comet
Team Centaur

Colin Snodgrass

University of Edinburgh

Team Comet

Cai Stoddard-Jones

Cardiff University

Team Comet
Student

Helen Usher

The Open University, UK

Team Comet
Student

Kacper Wierzchos

Catalina Sky Survey, University of Arizona

Team Comet

Padma A. Yanamandra-Fisher

Space Science Institute

Team Comet

Quanzhi Ye

University of Maryland

Team Comet

Observations

We use the NEOexchange Target Observation Manager (Lister et al. 2021) to schedule observations. NEOx provides a solar system centered interface to the Las Cumbres Observatory scheduling system. Below is a summary of our observations taken up to 2024-07-24.

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ObjectFirst date (UTC)Last date (UTC)Δt (days)N epochsFirst rh (au)Last rh (au)Total exposure time (s)

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Δt = total time span covered, N epochs = approximate number of distinct observational epochs, rh = heliocentric distance (<0 for pre-perihelion epochs).

Publications

Filters:
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Date

Targets

Description

Reference

2020 Oct

All

Project summary for the AAS Division for Planetary Sciences meeting.

2022 July

All, 7P/Pons-Winnecke, 57P/duToit-Neujmin-Delporte, 156P/Russell-LINEAR, P/2020 X1 (ATLAS), C/2021 A1 (Leonard)

The LCO Outbursting Objects Key Project: Overview and Year 1 Status

2021 Oct

All Oort cloud comets

Summary of Oort cloud comet program and preliminary results. Includes C/2014 UN271 brightness fading and outburst.

2023 July

All Oort cloud comets

A Song of Fire & Ice: Evolutionary Properties of Hot & Cold Small Bodies

Holt 2023, University of Maryland, College Park

2024 Dec 10

All Oort cloud comets

Analysis of multiyear lightcurves and colors of 21 Oort cloud comets.

Holt et al. 2024, The Planetary Science Journal 5, 273

2021 Mar 19

7P/Pons-Winnecke

–0.2 mag outburst. Also tentative –0.4 mag outburst in ZTF data on 2021 Feb 3.

2022 Nov 21

7P/Pons-Winnecke

–1.9 mag outburst.

2023 Sep 23

12P/Pons-Brooks

–0.9 mag outburst.

2023 Oct 06

12P/Pons-Brooks

–5 mag outburst.

2024 Sep 20

12P/Pons-Brooks

Optical coma composition and spatial analysis suggesting an extended source of C2

2021 Apr 20

22P/Kopff

–1.1 mag outburst. Note actual aperture radius for ZTF is 5.7".

2021 Oct 19

29P/Schwassmann-Wachmann 1

–0.2 mag outburst (discovered in GIT photometry).

2022 Oct 24

44P/Reinmuth 2

–0.6 mag outburst (also –0.4 mag outburst in ZTF data).

2021 Nov 17

67P/Churyumov-Gerasimenko

–0.6 mag outburst.

2022 Aug 18

73P/Schwassmann-Wachmann 3

–0.35 mag outburst.

2021 Sep 08

95P/Chiron (2060)

Aphelion activity discovered in ATLAS data.

2024 Jul 25

95P/Chiron (2060)

The Discovery and Evolution of a Possible New Epoch of Cometary Activity by the Centaur (2060) Chiron

2024 Dec

95P/Chiron (2060)

Centaurs and beyond: analysing serendipitous observations from wide-field surveys

Dobson 2024, Queen's University Belfast

2021 Nov 02

97P/Metcalf-Brewington

–1.5 mag outburst.

2021 Nov 13

191P/McNaught

–1.6 mag outburst.

2022 Aug 1

285P/LINEAR

–4 mag outburst.

2021 Sep 27

382P/Larson

–1.0 mag outburst.

2021 Sep

433P/248370 (2005 QN173)

Imaging and photometry of a new main-belt comet.

2023 Aug 25

P/2014 W1 (PanSTARRS)

<–1.6 mag outburst.

2021 Jun 22

C/2014 UN271 (Bernardinelli-Bernstein)

Observations and photometry show this previously inactive object is a comet.

2021 Sep 09

C/2014 UN271 (Bernardinelli-Bernstein)

–0.6 mag outburst.

2022 July

C/2014 UN271 (Bernardinelli-Bernstein)

A LOOK at Outbursts of Comet C/2014 UN271 (Bernardinelli-Bernstein) Near 20 au

2022 Sep

C/2014 UN271 (Bernardinelli-Bernstein)

Observations during a 20-au outburst of the largest observed Oort-cloud comet C/2014 UN271 (Bernardinelli-Bernstein), focused on VLT data, but includes an update on LOOK observations.

2023 Jul 05

C/2018 F4 (PanSTARRS)

Photometry and morphology of and possible causes for the split comet C/2018 F4 (PanSTARRS)

2021 May 10

C/2020 R4 (ATLAS)

–0.6 mag outburst (also –1.0, –1.1 outbursts in ZTF data).

2021 Jun 04

C/2020 R4 (ATLAS)

–1.4 mag brightening over a 94 hr period.

Kelley et al. 2021, CBET 4996

2023 Dec 01

C/2023 RN3 (ATLAS)

Identification of cometary activity.

2024 Nov 28

C/2023 RN3 (ATLAS)

Analysis of the activity and orbital dynamics of a distant Jupiter-family comet.

Copyright © Michael S. P. Kelley 2024