Approximate minimum heliocentric distance r_X, in au, at which a still unseen object having a mass M_X equal to that of the astronomical bodies listed here can be located according to the limit A_bary=GM_X/r²_X≤ 1.2 × 10⁻⁹ m s⁻² on the SSB's acceleration recently obtained by Zakamska & Tremaine (2005) from pulsar timing data. We used the maximum value A_bary/c= 4 × 10⁻¹⁸ s⁻¹, where c is the speed of light in vacuum, of the SSB acceleration allowed by pulsar timing data for about 100 per cent of the sky at 95 per cent level of confidence (table 2 of Zakamska & Tremaine 2005).