Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
EPSC Abstracts
Vol.14, EPSC2020-536, 2020, updated on 08 Oct 2020
https://doi.org/10.5194/epsc2020-536
Europlanet Science Congress 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Rotational properites of transneptunian objects from the K2 mission

Csaba Kiss1,2, Viktória Kecskeméthy1,3, Róbert Szakáts1, András Pál1, László Molnár1, Krisztián Sárneczky1, József Vinkó1,2, Róbert Szabó1,2, Gyula M. Szabó4,5, Gábor Marton1, and László L. Kiss1,2
Csaba Kiss et al.
  • 1Konkoly Observatory, Research Center for Astronomy and Earth Sciences, Budapest, Hungary
  • 2ELTE Eötvös Loránd University, Institute of Physics, Budapest, Hungary
  • 3Eötvös University, Faculty of Science, Budapest, Hungary
  • 4ELTE Eötvös Loránd University, Gothard Astrophysical Observatory, Szombathely, Hungary
  • 5MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h.u. 112, Hungary

Due to their faintness light curves of transneptunian objects (TNOs) in most cases are difficult to obtain, and therefore the number of TNOs with known rotational properties (at least rotation period) are rather limited. As it was shown for other small body populations, long-term, 1-3-month monitoring of small bodies revealed many targets with long rotation periods. These measurements significantly increased the number of slow rotators (P > 24h) for Jovian Trojans (Szabó et al., 2017), Hildas (Szabó et al., 2020) and Centaurs (Marton et al., 2020) using Kepler/K2 measurements, and also for main belt asteroids (Pál et al., 2020) using the TESS space telescope. Here we report on Kepler/K2 measurements of 70 TNOs, collected over the whole length of the K2 mission, in Campaigns 3-19. Our data notably increases the number of TNOs with known rotational properties. We compare these characteristics with those of other small body populations in the Solar system.

Figure 1: Light curve of (50000) Quaoar obtained from the K2 measurements, folded with the canonical P = 8.84 h period (Ortiz et al., 2003, left), and with the newly determined P = 8.88h rotation period (right). 

References: 

- Marton, G., et al., 2020, Icarus, 345, 113721 
- Ortiz, J.L., et al., 2003, A&A, 409, L13
- Pál, A., et al., 2020, ApJS, 247, 26 
- Szabó, Gy. et al., 2017, A&A, 599, A44 
- Szabó, Gy. et al., 2020, ApJS, 247, 34

How to cite: Kiss, C., Kecskeméthy, V., Szakáts, R., Pál, A., Molnár, L., Sárneczky, K., Vinkó, J., Szabó, R., Szabó, G. M., Marton, G., and Kiss, L. L.: Rotational properites of transneptunian objects from the K2 mission, Europlanet Science Congress 2020, online, 21 September–9 Oct 2020, EPSC2020-536, https://doi.org/10.5194/epsc2020-536, 2020

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