adstring                Return RA and Dec as character string(s) in
                        sexigesimal format
airtovac                Convert air wavelengths to vacuum wavelengths
aitoff                  Convert longitude, latitude to X,Y using an
                        AITOFF projection
altaz2hadec             Convert horizon (Alt-Az) coordinates to hour
                        angle and declination
astrolibR-package       astrolibR: Astronomy Users Library
baryvel                 Calculates heliocentric and barycentric
                        velocity components of Earth
bprecess                Precess celestial positions from J2000.0 (FK5)
                        to B1950.0 (FK4)
calz_unred              Deredden a galaxy spectrum using the Calzetti
                        et al. (2000) recipe
ccm_unred               Deredden a flux vector using the Cardelli et
                        al. (1989) parameterization
cirrange                Force an angle into the range 0 <= ang < 360
co_aberration           Calculate changes to right ascension and
                        declination due to astronomical aberration
co_nutate               Calculate changes in right ascension and
                        declination due to nutation of the Earth's
                        rotation
co_refract              Calculate correction to altitude due to
                        atmospheric refraction
co_refract_forward      Calculate the true altitude of a celestial
                        object from an observed altitude.
cosmo_param             Derive full set of cosmological density
                        parameters from a partial set
ct2lst                  Convert from Local Civil Time to Local Mean
                        Sidereal Time
daycnv                  Convert Julian dates to Gregorian calendar
                        dates
deredd                  Deredden stellar Stromgren parameters given for
                        a value of E(b-y)
dtdz                    Integrand for cosmic age vs. redshift in
                        standard cosmology
eci2geo                 Convert Earth-centered inertial coordinates to
                        geographic spherical coordinates
eq2hor                  Convert celestial (ra-dec) coords to local
                        horizon coords (alt-az)
eqpole                  Convert Right Ascension and declination to X,Y
                        using an equal-area polar projection
euler                   Transform between Galactic, celestial, and
                        ecliptic coordinates
flux2mag                Convert from flux (ergs/s/cm^2/A) to
                        astronomical magnitudes
fm_unred                Deredden a flux vector using the Fitzpatrick
                        (1999) parameterization
gal_uvw                 Calculate the Galactic space velocity (U,V,W)
                        of a star
galage                  Determine the age of a galaxy given its
                        redshift and a formation redshift
gcirc                   Computes rigorous great circle arc distances
                        between points on the celestial sphere
geo2eci                 Convert geographic spherical coordinates to
                        Earth-centered inertial coordinates
geo2geodetic            Convert from geographic/planetographic to
                        geodetic coordinates
geodetic2geo            Convert from geodetic (or planetodetic) to
                        geographic coordinates
glactc                  Convert between celestial and Galactic (or
                        Supergalactic) coordinates
glactc_pm               Convert between celestial and Galactic (or
                        Supergalactic) proper motion and coordinates
hadec2altaz             Convert Hour Angle and Declination to Horizon
                        (alt-az) coordinates
helio                   Compute (low-precision) heliocentric
                        coordinates for the planets
helio_jd                Convert geocentric (reduced) Julian date to
                        heliocentric Julian date
helio_rv                Calculate the heliocentric radial velocity of a
                        spectroscopic binary
hor2eq                  Converts local horizon coordinates (alt-az) to
                        equatorial coordinates(ra-dec)
imf                     Compute an N-component power-law logarithmic
                        stellar initial mass function
intdiv                  Integer divide
ismeuv                  Compute the continuum interstellar extreme
                        ultraviolet (EUV) optical depth
jdcnv                   Convert Gregorian dates to Julian days
jprecess                Precess celestial positions from B1950.0 (FK4)
                        to J2000.0 (FK5) with proper motion
juldate                 Convert from calendar to Reduced Julian Date
ldist                   Integrand for luminosity distance calculation
lsf_rotate              Create a 1-d convolution kernel to broaden a
                        spectrum from a rotating star
lumdist                 Calculate luminosity distance (in Mpc) of an
                        object given its redshift
mag2flux                Convert from astronomical magnitudes to flux
                        (ergs/s/cm^2/A)
month_cnv               Convert between a month name and the equivalent
                        number
moonpos                 Compute the Right Ascension and Declination of
                        the Moon at specified Julian date(s)
mphase                  Calculate the illuminated fraction of the Moon
                        at given Julian date(s)
nutate                  Calculate the nutation in longitude and
                        obliquity for a given Julian date
planck                  Calculate the Planck function in units of
                        ergs/cm2/s/A
planet_coords           Calculate low precision Right Ascension and
                        declination for the planets given a date
polyidl                 Calculate polynomial
posang                  Compute position angle of source 2 relative to
                        source 1
precess                 Precess coordinates from EQUINOX1 to EQUINOX2
precess_xyz             Precess equatorial geocentric rectangular
                        coordinates
premat                  Return the precession matrix needed to go from
                        EQUINOX1 to EQUINOX2
radec                   Convert Right Ascension and declination from
                        decimal to sexigesimal units
rhotheta                Calculate the separation and position angle of
                        a binary star
sixty                   Convert a decimal number to sexigesimal
sphdist                 Distance on a sphere
sunpos                  Compute the Right Ascension and Declination of
                        the Sun at specified Julian date(s)
ten                     Convert a sexigesimal number or string to
                        decimal
uvbybeta                Derive dereddened colors, metallicity, and Teff
                        from Stromgren colors
vactoair                Convert vacuum wavelengths to air wavelengths
xyz                     Calculate geocentric X,Y, and Z and velocity
                        coordinates of the Sun
ydn2md                  Convert from year and day number of year to
                        month and day of month
ymd2dn                  Convert from year, month, day to day number of
                        year
zang                    Determine the angular size of an object as a
                        function of redshift
