# Errata 2010

#### Time Scales, Section B

• Page B10, Equation of the Equinoxes:

The first paragraph of the Equation of the Equinoxes portion should read as in the attached PDF.

• Page B50, Equinox Method of reduction from the GCRS — rigorous formulae

The term M3,3 should read

sin ϵ cos ψ sin φ + cos ϵ cos φ

• Page B51, Offsets of the Pole and Origin at J2000.0

For F-W IAU 2006, in the column φB

replace 6.891 with 6.819

• Page B54, in the formulae c:

replace $-0.0001\,0415\,5607\ T^3$
with $+2.9710\ \times\ 10^{-8}\ T^3$

and in the formulae c':

replace $-0.0001\,0417\,7728\ T^3$
with $+7.5882\ \times\ 10^{-9}\ T^3$

#### Planets and Pluto, Section E

• Page E3, the North Pole Right Ascensions and Declinations are incorrect. Please replace as follows:

 Planet α1 δ1 Mercury 281.03 61.46 Venus 272.76 67.16 Mars 317.75 52.92 Jupiter I 268.07 64.49 Jupiter II 268.07 64.49 Jupiter III 268.07 64.49 Saturn 41.04 83.58 Uranus 257.45 -15.19 Neptune 299.48 42.98 Pluto 313.12 6.20

All numbers are in degrees.

#### Tables and Data, Section K

• Page K7:

For Mass of the Earth, #21,

replace 5.972 1986 × 1025 with 5.972 186 × 1024

The Astronomical Almanac Online! 2020