# Errata 2001

#### TIME SCALES AND COORDINATE SYSTEMS, Section B

• Page B6, The equation of the equinoxes and the paragraph following should read:

equation of equinoxes = $\frac{1}{15} (\Delta\psi\ cos\ \varepsilon + 0.\!\!^{\prime\prime}002\,64\ sin\ \Omega + 0.\!\!^{\prime\prime}000\,63\ sin\ 2\Omega)$

and Δψ is the total nutation in longitude, ε is the mean obliquity of the ecliptic and Ω is the mean longitude of the ascending node of the Moon. The equation of the equinoxes is tabulated on pages B8-B15 at 0hUT for each day and should be interpolated to the required time if full precision is required.

• Pages B18, B20, B21, and B23: The wrong symbol was used to define the obliquity of the ecliptic.

#### SUN, Section C

• Page C24: The wrong symbol was used to define the obliquity of the ecliptic.

#### MAJOR PLANETS, Section E

• Page E88, First table, Heading for the last column under Coefficient of the Potential:

• Page E88, Second table, Heading for the second column under Mean Density, mean density for Pluto:

#### SATELLITES OF THE PLANETS, Section F

• Page F2, the entry in the last column of the table for Neptune VIII Proteus:

#### STARS AND STELLAR SYSTEMS, Section H

• Page H61, the entry in the last column of the table for 1228+126 (3C 274)

for 17.90 Jy read 71.90 Jy

#### ASTRONOMICAL CONSTANTS, Section K

• Page K6, the wrong symbol was used to define the obliquity of the ecliptic.

• Page K8, second to last line,

for - 0.000 091 (n')(year -1955)2 seconds, read -0.000 091 (n' + 26)(year -1955)2 seconds.

The Astronomical Almanac Online! 2015
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