Last giant impact on the Neptunian system - Constraints on oligarchic masses in the trans-Saturnian region

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Table 2

Orbital and physical parameters of the Neptunian irregulars taken from JPL (http://ssd.jpl.nasa.gov).

Irregular satellites	r _s^*	ρ _s^**	Magnitude	Albedo	a^x	e	i⁺	P⁺⁺

I Triton	1,352.6	2.06	13.5 V_o	0.76	14.33	0.0000	156.885	5.88
II Nereid	170.0	1.50	19.7 V_o	0.16	222.65	0.7507	7.230	360.13
IX Halimede	31.0	1.50	19.2 R	0.04	670.77	0.2646	112.712	1879.08
XI Sao	22.0	1.50	24.5 R	0.04	897.60	0.1365	53.483	2912.72
XII Laomedeia	21.0	1.50	25.5 R	0.04	951.66	0.3969	37.874	3171.33
XIII Neso	30.0	1.50	24.6 R	0.04	1990.19	0.5714	136.439	9740.73
XPsamathe	20.0	1.50	25.5 R	0.04	1942.17	0.3809	126.312	9074.30

Notes. .

^(*)

The mean satellite radius r_s is given in km.

^(**)

The mean satellite density ρ_s is given in g cm^-3.

^(x)

The orbital semiaxis a is in units of R_N = 24 764 km

⁽⁺⁾

The orbital inclination i is measured with respect to the ecliptic.

⁽⁺⁺⁾

The orbital period P is given in days.

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