# Errata 2012

#### Time Scales, Section B

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

sin ϵ cos ψ sin φ̄ + cos ϵ cos φ̄

• 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 $+7.5882\ \times\ 10^{-9}\ T^3$

#### Stars and Stellar Systems, Section H

• Page H56

Exoplanet υ And d should be υ And b and Exoplanet υ And b should be υ And d

#### Notes and References, Section L

• Page L23

In the table of IAU constants after the fourth paragraph of Section K material, the first value— Light-time for unit distance—should be

499s.004 783 806 1 (TDB)

The printed value is missing the units symbol and decimal point.

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