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
- LOOK Project overview, July 2024
- C/2019 F1 (ATLAS-Africano) and C/2019 L3 (ATLAS) lightcurvesHolt et al. 2024, The Planetary Science Journal 5, 273
- 7P/Pons-Winnecke outbursts, March 2021
- 7P/Pons-Winnecke post-perihelion outbursts
- 12P/Pons-Brooks morphology
- 57P/duToit-Neujmin-Delporte, October/November 2022
- 95P/Chiron (2060) lightcurve
- 156P/Russell-LINEAR lightcurve
- 156P/Russell-LINEAR morphology
- P/2020 X1 (ATLAS) lightcurve
- C/2014 UN271 is a comet, June 2021
- C/2014 UN271 morphology, June 2021 to February 2022
- C/2014 UN271 color, June 2021 to February 2022
- C/2014 UN271 lightcurve, June 2021 to February 2022
- C/2014 UN271 lightcurve, June 2021 to February 2022
- C/2018 F4 (PanSTARRS)
- C/2018 F4 (PanSTARRS)
- C/2019 L3 (ATLAS) and C/2020 R7 (ATLAS)
- C/2020 R4 (ATLAS) outbursts, April/May 2021
- C/2021 A1 (Leonard) morphology, November 2021
- C/2021 E3 (ZTF) morphologyHolt et al. 2024, The Planetary Science Journal 5, 273
- C/2021 O3 (PanSTARRS), presumed disintegratedHolt et al. 2024, The Planetary Science Journal 5, 273
- C/2023 RN3 (ATLAS) morphology, November 2023
- C/2023 RN3 (ATLAS) activity versus time, August 2023 to January 2024
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
James Bauer
University of Maryland
Dennis Bodewits
Auburn University
Joseph Chatelain
Las Cumbres Observatory
Matthew Dobson
Queen's University Belfast
Estela Fernández-Valenzuela
University of Central Florida
Daniel Gardener
University of Edinburgh
Geza Gyuk
Adler Planetarium
Mark Hammergren
Farther Horizons LLC
Carrie Holt
Las Cumbres Observatory
Henry Hsieh
Planetary Science Institute
Man-To Hui
University of Hawaii/Macau University of Science and Technology
Emmanuel Jehin
University of Liège
Michael S. P. Kelley
University of Maryland
Matthew Knight
US Naval Academy
Rosita Kokotanekova
European Southern Observatory
Eva Lilly
Planetary Science Institute
Tim Lister
Las Cumbres Observatory
Adam McKay
Appalachian State University
Youssef Moulane
Auburn University
Cyrielle Opitom
University of Edinburgh
Silvia Protopapa
Southwest Research Institute
Ryan Ridden-Harper
University of Canterbury, NZ
Charles Schambeau
University of Central Florida
Megan Schwamb
Queen's University Belfast
Colin Snodgrass
University of Edinburgh
Cai Stoddard-Jones
Cardiff University
Helen Usher
The Open University, UK
Kacper Wierzchos
Catalina Sky Survey, University of Arizona
Padma A. Yanamandra-Fisher
Space Science Institute
Quanzhi Ye
University of Maryland
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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Object | First date (UTC) | Last date (UTC) | Δt (days) | N epochs | First 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
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.
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).
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 Sep
433P/248370 (2005 QN173)
Imaging and photometry of a new main-belt comet.
2021 Jun 22
C/2014 UN271 (Bernardinelli-Bernstein)
Observations and photometry show this previously inactive object is a comet.
Kokotanekova et al. 2021, ATel 14733, 1; Buzzi et al. 2021, CBET 4989; Buzzi et al. 2021, MPEC 2021-M83
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
2024 Nov 28
C/2023 RN3 (ATLAS)
Analysis of the activity and orbital dynamics of a distant Jupiter-family comet.