Refined physical parameters for Chariklo’s body and rings from stellar occultations observed between 2013 and 2020

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Table 1

Occulted star parameters for each observed event, as obtained from Gaia EDR3.

Occ. date and time	Gaia EDR3	Right ascension ⁽¹⁾	Declination ⁽¹⁾	G mag
UTC	source identifier
2020-06-19 15:51	6852214948874014720	20^h 02^m 31^s.99612 ± 0.21 mas	−22° 20′ 41″.4784 ± 0.14 mas	15.569
2019-09-04 08:03	6766511277365829760	19^h 27^m 42^s.15144 ± 0.09 mas	−25° 29′ 21″.2488 ± 0.06 mas	13.117
2019-08-08 21:41	6766365630734160896	19^h 31^m 49^s.78464 ± 0.11 mas	−25° 34′ 26″.7724 ± 0.09 mas	15.158
2019-08-02 10:02	6766356933423996544	19^h 33^m 07^s.47470 ± 0.42 mas	−25° 34′ 42″.3668 ± 0.35 mas	17.766
2017-08-24 02:59	6737213175138988672	18^h 42^m 35^s.22729 ± 0.18 mas	−31° 09’ 50”.6837 ± 0.14 mas	17.468
2017-07-23 05:58	6737020112089260672	18^h 48^m 09^s.22138 ± 0.04 mas	−31° 26′ 32″.4591 ± 0.03 mas	14.005
2017-06-22 21:18	6760223758801661440	18^h 55^m 15^s.65251 ± 0.04 mas	−31° 31′ 21″.6706 ± 0.03 mas	14.223
2017-04-09 02:24	6757456459825426560	19^h 04^m 03^s.62801 ± 0.03 mas	−31° 17′ 15″.2304 ± 0.03 mas	14.094

Notes. ⁽¹⁾The stars coordinates (RA and Dec) and their uncertainties were propagated to the occultation epoch with the formalism proposed by Butkevich & Lindegren (2014) using the parameters (e.g. proper motion, parallax, radial velocity) from Gaia EDR3 (Gaia Collaboration 2021).

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