Type Members

1.  sealed class Angle extends AnyRef

   Exact angles represented as integral microarcseconds.

   Exact angles represented as integral microarcseconds. These values form a commutative group over addition, where the inverse is reflection around the 0-180° axis. The subgroup of angles where integral microarcseconds correspond with clock microseconds (i.e., where they are evenly divisible by 15 microarcseconds) is represented by the HourAgle subtype.

   Lawful conversion to and from other types/scales is provided by optics defined on the companion object. Floating-point conversions are provided directly

2.  trait AngleOptics extends OpticsHelpers
3.  final case class Coordinates(ra: RightAscension, dec: Declination) extends Product with Serializable

   A point in the sky, given right ascension and declination.

4.  trait CoordinatesOptics extends AnyRef
5.  type Dec = Declination
6.  sealed abstract case class Declination extends Product with Serializable

   Celestial latitude, measured in angular distance from the celestial equator.

   Celestial latitude, measured in angular distance from the celestial equator. Points north of the celestial equator have positive declinations, while those south have negative declinations. This is a newtype wrapper for an Angle constrainted to the range [-90°, 90°], or [270 - 360) + [0 - 90] in terms of the underlying Angle. Note that the range is *inclusive* of both poles.

   See also

   The helpful Wikipedia article.

7.  trait DeclinationOptics extends AnyRef
8.  final class Epoch extends AnyRef

   An epoch, the astronomer's equivalent of Instant, based on a fractional year in some temporal scheme (Julian or Besselian) that determines year zero and the length of a year.

   An epoch, the astronomer's equivalent of Instant, based on a fractional year in some temporal scheme (Julian or Besselian) that determines year zero and the length of a year. The only meaningful operation for an Epoch is to ask the elapsed epoch-years between it and some other point in time. We need this for proper motion corrections because velocities are measured in motion per epoch-year. The epoch year is stored internally as integral milliyears.

   See also

   The Wikipedia article

9.  trait EpochOptics extends AnyRef
10.  final class HourAngle extends Angle

    Exact hour angles represented as integral microseconds.

    Exact hour angles represented as integral microseconds. These values form a commutative group over addition, where the inverse is reflection around the 0-12h axis. This is a subgroup of the integral Angles where microarcseconds are evenly divisible by 15.

    Lawful conversion to and from other types/scales is provided by optics defined on the companion object. Floating-point conversions are provided directly

    See also

    The helpful Wikipedia article.

11.  trait HourAngleOptics extends OpticsHelpers
12.  sealed abstract case class Index extends Product with Serializable

    A positive, non-zero value for numbered identifiers.

13.  trait IndexOptics extends AnyRef
14.  sealed abstract case class JulianDate extends Product with Serializable

    Astronomical time representation of continuous days since noon, November 24, 4714 BC.

    Astronomical time representation of continuous days since noon, November 24, 4714 BC.

    See also

    The Wikipedia article

15.  final case class MagnitudeValue(scaledValue: Int) extends Product with Serializable

    Exact magnitude value represented as an int with the original value scaled up

    Exact magnitude value represented as an int with the original value scaled up

    scaledValue

    This magnitude integral value, as the original multiplied by 100. value is dimensionless

    See also

    The Wikipedia https://en.wikipedia.org/wiki/Apparent_magnitude

16.  final case class Offset(p: P, q: Q) extends Product with Serializable

    Angular offset with P and Q components.

17.  trait OffsetOptics extends AnyRef
18.  trait OpticsHelpers extends AnyRef
19.  final case class ProperMotion(baseCoordinates: Coordinates, epoch: Epoch, properVelocity: Option[Offset], radialVelocity: Option[RadialVelocity], parallax: Option[Angle]) extends Product with Serializable

    Time-parameterized coordinates, based on an observed position at some point in time (called the epoch) and measured velocities in distance (radialVelocity; i.e., doppler shift) and position (properVelocity) per year.

    Time-parameterized coordinates, based on an observed position at some point in time (called the epoch) and measured velocities in distance (radialVelocity; i.e., doppler shift) and position (properVelocity) per year. Given this information we can compute the position at any instant in time. The references below are extremely helpful, so do check them out if you're trying to understand the implementation.

    baseCoordinates

    observed coordinates at epoch

    epoch

    time of the base observation; typically Epoch.J2000

    properVelocity

    proper velocity per year in RightAscension and Declination, if any

    radialVelocity

    radial velocity (km/y, positive if receding), if any

    parallax

    parallax, if any

    See also

    The pretty good wikipedia article

    Astronomical Almanac 1984 p.B39

    Astronomy and Astrophysics 134 (1984) p.1-6

20.  trait ProperMotionOptics extends AnyRef
21.  type RA = RightAscension
22.  sealed abstract case class RadialVelocity extends Product with Serializable

    Radial Velocity represented as integral meters per second, positive if receding.

    Radial Velocity represented as integral meters per second, positive if receding. We can also view velocity in terms of redshift (a dimensionless value called z).

    See also

    Wikipedia on Radial Velocity

    Wikipedia on Redshift

23.  final case class RightAscension(toHourAngle: HourAngle) extends Product with Serializable

    Celestial longitude, measured eastward along the celestial equator from the vernal equinox to the hour circle of the point in question.

    Celestial longitude, measured eastward along the celestial equator from the vernal equinox to the hour circle of the point in question. This class is a simple newtype wrapper for an HourAngle.

    toHourAngle

    the underlying hour angle

    See also

    The helpful Wikipedia article.

24.  trait RightAscensionOptics extends AnyRef
25.  sealed abstract case class Wavelength extends Product with Serializable

    Exact wavelengths represented as unsigned integral picometers in the range [0 ..

    Exact wavelengths represented as unsigned integral picometers in the range [0 .. Int.MaxValue] which means the largest representable wavelength is 2.147483647 mm.