Fig. 1
Average eccentricity 
vs. multiplicity M
anticorrelation reported by Zinzi & Turrini (2017) studying the sample of the 258 more completely characterized exoplanets at the time. The symbols for
M = 7 and M = 8 are TRAPPIST-1 and the solar system, respectively. The current average eccentricity of TRAPPIST-1 is lower than the value estimated from the data available in 2017 (see also Sect. 2).
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