Package index • astrocoords

Coordinates

Create and inspect sky coordinate vectors.

sky_coord(): Create sky coordinates
is.sky_coord(): Check whether an object is a sky_coord vector
ra_dec(): Create ICRS sky coordinates
gal_coord(): Create Galactic sky coordinates
ra(): Get right ascension (RA)
dec(): Get declination (Dec)
l(): Get Galactic longitude (l)
b(): Get Galactic latitude (b)
frame(): Frame accessor
separation(): Angular separation between sky coordinates

Matching

Low-level catalog matching helpers.

coord_match() coord_nearest(): Match two sky catalogs within angular radius
coord_left_join() coord_nearest_join() coord_right_join() coord_full_join() coord_inner_join(): Spatial left join for sky coordinates

Frames and Transforms

Define coordinate frames and transform between them.

to_cartesian(): Convert sky coordinates to Cartesian unit vectors
icrs(): ICRS frame
galactic(): Galactic frame
transform_to(): Transform sky coordinates to another frame

Parsing and Naming

Parse, format, and convert sexagesimal coordinates.

parse_coord(): Parse coordinate strings into ICRS sky_coord
iau_name(): Build IAU-style source names from sky coordinates
deg_to_hms(): Format degrees as RA-like HMS strings
deg_to_dms(): Format degrees as DMS strings
hms_to_deg(): Convert HMS components to degrees
dms_to_deg(): Convert DMS components to degrees

Time

Convert between calendar dates and JD/MJD.

datetime_to_jd(): Convert date-time to Julian Date (JD)
jd_to_datetime(): Convert Julian Date (JD) to date-time
mjd_to_datetime(): Convert Modified Julian Date (MJD) to date-time
leap_second_dates(): Leap-second dates (UTC)

Printing Options

Control how sky coordinates are printed.

set_print_hms() set_print_plain() set_print_colon() set_print_pair(): Set printing style for sky coordinates