Planck 2018 results
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Table 3.

Relative velocities involving the CMB frame, the Galactic centre, and the Local Group.

Relative Speed l b
velocity [km s−1] [deg] [deg]
Sun–CMB (a)....... 369.82 ± 0.11 264.021 ± 0.011 48.253 ± 0.005
Sun–LSR (b)....... 17.9 ± 2.0 48 ± 7 23 ± 4
LSR–GC (c)....... 239 ± 5 90 0
GC–CMB (d)....... 565 ± 5 265.76 ± 0.20 28.38 ± 0.28
Sun–LG (e)....... 299 ± 15 98.4 ± 3.6 −5.9 ± 3.0
LG–CMB (d)....... 620 ± 15 271.9 ± 2.0 29.6 ± 1.4

Notes.

(a)

Velocity of the Sun relative to the CMB; Planck 2018.

(b)

Velocity of the Sun relative to the Local Standard of Rest from Schönrich et al. (2010), adding statistical and systematic uncertainties.

(c)

Rotational velocity of the LSR from McMillan (2011).

(d)

Resulting velocity, using non-relativistic velocity addition and assuming uncorrelated errors.

(e)

Velocity of the Sun relative to the Local Group from Diaz et al. (2014).

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