Log-linear ρ_p - P_orb diagram of known close-in transiting exoplanets with 3 R_⊕ < R_p < 7 R_⊕ and mean density measured with an accuracy to within 30%. Circles indicate the position of planets with eccentricity e ≤ 0.1, while five-pointed stars indicate those with e > 0.1. The values of the parameters were taken from TEPCat. Horizontal error bars have been suppressed for clarity. Vertical error bars represent one standard deviation. The red star indicates the position of the new planet TOI-5795 b (see Sect. 4). The green star indicates the position of the new planet TOI-5800 b from our HONEI I paper (Naponiello et al. 2025b); its mean density has been measured with an accuracy <50%. The three coloured regions of the diagram are those recognised by Castro-González et al. (2024a).