pcl::StarPosition Struct Reference

Positional data of a star. More...

#include <Position.h>

Public Member Functions
	StarPosition ()=default
	StarPosition (const StarPosition &x)
	StarPosition (double ra, double dec, double properMotionRA=0, double properMotionDec=0, double parallax=0, double radialVelocity=0, TimePoint epoch=TimePoint::J2000())
StarPosition &	operator= (const StarPosition &x)

Public Attributes
double	alpha = 0
	ICRS right ascension in degrees.
double	delta = 0
	ICRS declination in degrees.
double	muAlpha = 0
	Proper motion in right ascension, mas/year * cos( delta ).
double	muDelta = 0
	Proper motion in declination, in mas/year.
double	p = 0
	Parallax in arcseconds.
TimePoint	t0 = TimePoint::J2000()
	Epoch of coordinates.
double	v = 0
	Radial velocity in km/s, positive away from Earth.

Detailed Description

This structure provides the data necessary for reduction of star positions with the following member functions:

Position::Geometric( const StarPosition& )
Position::Astrometric( const StarPosition& )
Position::Proper( const StarPosition& )
Position::Apparent( const StarPosition& )
Position::Intermediate( const StarPosition& )

Definition at line 83 of file Position.h.

Constructor & Destructor Documentation

StarPosition() [1/3]

pcl::StarPosition::StarPosition ( )

default

Default constructor. See data members for default values.

StarPosition() [2/3]

pcl::StarPosition::StarPosition ( const StarPosition &  x )

inline

Copy constructor.

Definition at line 101 of file Position.h.

StarPosition() [3/3]

pcl::StarPosition::StarPosition ( double  ra, double  dec, double  properMotionRA = 0, double  properMotionDec = 0, double  parallax = 0, double  radialVelocity = 0, TimePoint  epoch = TimePoint::J2000()  )

inline

Memberwise constructor.

Parameters

ra	Right ascension equatorial coordinate in degrees. Can be specified in the range [-180,+180] or [0,360) indistinctly.
dec	Declination equatorial coordinate in degrees. Should be in the [-90,+90] range.
properMotionRA	Proper motion in right ascension, in mas/year, measured on a great circle, that is, the specified value must be the proper motion in R.A. multiplied by the cosine of the declination. Zero by default.
properMotionDec	Proper motion in declination, in mas/year. Zero by default.
parallax	Parallax in arcseconds. Zero by default.
radialVelocity	Radial velocity in km/s, positive away from the Earth. Zero by default.
epoch	Epoch of catalog coordinates. J2000.0 by default.

Positions and proper motions must be referred to ICRS/J2000.0.

If out-of-range coordinates are specified, their values will be constrained to their proper ranges: right ascension to [0°,360°) and declination to [-90°,+90°].

Definition at line 159 of file Position.h.

Member Function Documentation

operator=()

StarPosition& pcl::StarPosition::operator= ( const StarPosition &  x )

inline

Copy assignment operator. Returns a reference to this object.

Definition at line 115 of file Position.h.

References alpha, delta, muAlpha, muDelta, p, t0, and v.

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The documentation for this struct was generated from the following file:

• Position.h