Polar motion of Venus | Astronomy & Astrophysics (A&A)

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Table A.1

Numerical parameters used for Venus.

Parameter		Value	Reference
Orbital period	2π/n	224.7 days
Sidereal rotation period	2π/Ω	243.0226(13) days	1
Gravitational parameter	GM_V	3.24858592(6) × 10¹⁴ m³s⁻²	2
J₂^a	$(C - \frac{B + A}{2}) / (M_{V} R^{2})$ $(C-\frac{B+A}{2})/(M_VR^2)$	4.4049(45) × 10⁻⁶	2
C₂₂^a	(B-A)/(4MVR²)	5.571(19) × 10⁻⁷	2
Normalized moment of inertia	C/(M_VR²)	0.337(24)	1
Obliquity	ε	2.6392(8)°	1
Init. spin-axis offset	β_J2000	0.481(20)°	2
Init. spin-axis direction	α_J2000 γ_J2000	46.5°(2.4°) −49.7°(2.4^°)	22

Notes. ^(a) J₂ and C₂₂ here are expressed in the BRF where the inertia matrix is diagonal, thus are slightly higher than in Konopliv et al. (1999), with relative differences of 10⁻⁴ and 6 × 10⁻³ respectively.

⁽¹⁾Margot et al. (2021); ^(²)Konopliv et al. (1999)

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