Asteroid phase curves using sparse and dense photometry
- 1Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
- 2Department of Astronomy and Space Informatics, V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
We present a phase-curve computation method capable of combining sparse survey data, like relative photometry with dense differential measurements. Combining those types of data allows to obtain phase-curves parameters for large number of asteroids for which using traditional approach would not be sufficient.
Using traditional dense ground-based photometry collected at Astronomical Observatory Institute of Adam Mickiewicz University in Poznań alongside with absolute Gaia measurements we were able to perform more accurate lightcurve amplitude correction and then derive the phase-slope parameter β of the phase-curve separately for each opposition which met our selection criteria. We show preliminary results for 31 oppositions of 24 asteroids.
In the future we plan to create a large photometric database containing sparse and dense photometry from various publicly available data sources (Gaia, ATLAS, K2, LSST, TESS, VISTA and others) which will include absolute, relative and differential photometry.
Acknowledgments: This work has been supported by grant No. 2017/25/B/ST9/00740 from the National Science Centre, Poland.
How to cite: Wilawer, E., Oszkiewicz, D., Kryszczyńska, A., Marciniak, A., and Shevchenko, V.: Asteroid phase curves using sparse and dense photometry, Europlanet Science Congress 2021, online, 13–24 Sep 2021, EPSC2021-522, https://doi.org/10.5194/epsc2021-522, 2021.
