“TNOs are Cool”: A survey of the trans-Neptunian region

Farkas-Takács, Anikó; Kiss, Cs.; Vilenius, E.; Márton, G.; Müller, Thomas; Mommert, Michael; Stansberry, J.; Lellouch, E.; Lacerda, Pedro; Pál, András

doi:10.1051/0004-6361/201936183

Cited by 6 publications

(5 citation statements)

References 70 publications

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“…For three of our targets the estimated Jacobi ellipsoid densities are in the order of ∼0.5 g cm −3 (ρ JE = 0.54, 0.39 and 0.48 g cm −3 for 2002 KY 14 , 2009 YD 7 and 2016 AE 193 , respectively, see Table 3), inside the range expected for smaller (D < 500 km) transneptunian objects and Centaurs (Grundy et al, 2019;Kiss et al, 2019). The Jacobi ellipsoid density estimates are, on the other hand, notably lower for 2012 VU 85 , 2017 CX 33 and 2013 PH 44 (ρ JE < 0.1 g cm −3 ), outside the range of densities plausibly considered, indicating that the light curves in these cases cannot be explained by equlibirium figures of rotating strengthless bodies.…”

Section: Rotating Elongated Bodies Versus Binaritymentioning

confidence: 52%

“…The binary separation, a bin is obtained from Kepler's third law, assuming a density of 0.7 g cm −3 to obtain the mass, characteristic for 10-100 km-sized Kuiper belt bodies and Centaurs (see e.g. Grundy et al, 2019;Kiss et al, 2019, for a latest compilation of Kuiper belt densities). The densities estimated for Ceto-Phorcys (ρ = 1.37 +0.66 −0.32 g cm −3 and Typhon-Echinda (ρ = 0.44 +0.44 −0.17 g cm −3 Grundy et al, 2008) are at the lower/upper extremes of the densities of ∼100 km-sized objects, and therefore may not be representative for the whole population.…”

Section: Characterisation Of Potential Binaritymentioning

confidence: 99%

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Light curves of ten Centaurs from K2 measurements

Márton

Kiss

Molnár

et al. 2020

Icarus

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Here we present the results of visible range light curve observations of ten Centaurs using the Kepler Space Telescope in the framework of the K2 mission. Well defined periodic light curves are obtained in six cases allowing us to derive rotational periods, a notable increase in the number of Centaurs with known rotational properties.The low amplitude light curves of (471931) 2013 PH 44 and (250112) 2002 KY 14 can be explained either by albedo variegations, binarity or elongated shape. (353222) 2009 YD 7 and (514312) 2016 AE 193 could be rotating elongated objects, while 2017 CX 33 and 2012 VU 85 are the most promising binary candidates due to their slow rotations and higher light curve amplitudes. (463368) 2012 VU 85 has the longest rotation period, P = 56.2 h observed among Centaurs. The P > 20 h rotation periods obtained for the two potential binaries underlines the importance of long, uninterrupted time series photometry of solar system targets that can suitably be performed only from spacecraft, like the Kepler in the K2 mission, and the currently running TESS mission.

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Section: Rotating Elongated Bodies Versus Binaritymentioning

confidence: 52%

Section: Characterisation Of Potential Binaritymentioning

confidence: 99%

Light curves of ten Centaurs from K2 measurements

Márton

Kiss

Molnár

et al. 2020

Icarus

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“…Table 5 lists the main orbital elements obtained from the JPL Horizons service (Giorgini et al 1996), as well as the dynamical group or mean-motion resonance of the target, the (Lellouch et al 2013;Vilenius 2014;Farkas-Takács et al 2020). When no radiometric size estimate was found, we used the H V absolute magnitude of the object (also listed in Table 5), assuming a geometric albedo of P V = 0.12 for cold classicals, which are predominantly red objects with relatively high albedos, and P V = 0.08 for all other dynamical groups (Farkas-Takács et al 2020;Lacerda et al 2014). The diameter is calculated as…”

Section: Appendix a Basic Tables Of K2 Tno Observationsmentioning

confidence: 99%

Light Curves of Trans-Neptunian Objects from the K2 Mission of the Kepler Space Telescope

Kecskeméthy

Kiss

Szakáts

et al. 2023

ApJS

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The K2 mission of the Kepler Space Telescope allowed the observations of light curves of small solar system bodies throughout the whole solar system. In this paper, we present the results of a collection of K2 trans-Neptunian object observations between campaigns C03 (2014 November–2015 February) and C19 (2018 August–September), which includes 66 targets. Due to the faintness of our targets, the detectability rate of a light-curve period is ∼56%, notably lower than in the case of other small-body populations, like Hildas or Jovian Trojans. We managed to obtain light-curve periods with an acceptable confidence for 37 targets; the majority of these cases are new identifications. We were able to give light-curve amplitude upper limits for the other 29 targets. Several of the newly detected light-curve periods are longer than ∼24 hr, in many cases close to ∼80 hr; i.e., these targets are slow rotators. This relative abundance of slowly rotating objects is similar to that observed among Hildas, Jovian Trojans, and Centaurs in the K2 mission, as well as among main belt asteroids measured with the TESS space telescope. Trans-Neptunian objects show notably higher light-curve amplitudes at large (D ≳ 300 km) sizes than found among large main belt asteroids, in contrast to the general expectation that due to their lower compressive strength, they reach hydrostatic equilibrium at smaller sizes than their inner solar system counterparts.

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“…https://astroarchive.noirlab.edu/ 15 https://noirlab.edu/science/documents/scidoc049316 As shown inFarkas-Takács et al (2020), among other results, TNOs may have albedos that range from 3% to 30% (ignoring the high albedos of the very largest TNOs, which are very unlikely to be present in our sample). The albedo assumption of 10% used here simply allows us to estimate our required depth.…”

mentioning

confidence: 76%

The DECam Ecliptic Exploration Project (DEEP). I. Survey Description, Science Questions, and Technical Demonstration

Trilling,

Gerdes,

Jurić

et al. 2024

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We present here the DECam Ecliptic Exploration Project (DEEP), a 3 yr NOAO/NOIRLab Survey that was allocated 46.5 nights to discover and measure the properties of thousands of trans-Neptunian objects (TNOs) to magnitudes as faint as VR ∼ 27 mag, corresponding to sizes as small as 20 km diameter. In this paper we present the science goals of this project, the experimental design of our survey, and a technical demonstration of our approach. The core of our project is “digital tracking,” in which all collected images are combined at a range of motion vectors to detect unknown TNOs that are fainter than the single exposure depth of VR ∼ 23 mag. Through this approach, we reach a depth that is approximately 2.5 mag fainter than the standard LSST “wide fast deep” nominal survey depth of 24.5 mag. DEEP will more than double the number of known TNOs with observational arcs of 24 hr or more, and increase by a factor of 10 or more the number of known small (<50 km) TNOs. We also describe our ancillary science goals, including measuring the mean shape distribution of very small main-belt asteroids, and briefly outline a set of forthcoming papers that present further aspects of and preliminary results from the DEEP program.

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“TNOs are Cool”: A survey of the trans-Neptunian region

Cited by 6 publications

References 70 publications

Light curves of ten Centaurs from K2 measurements

Light curves of ten Centaurs from K2 measurements

Light Curves of Trans-Neptunian Objects from the K2 Mission of the Kepler Space Telescope

The DECam Ecliptic Exploration Project (DEEP). I. Survey Description, Science Questions, and Technical Demonstration

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