How to use the poliastro.constants function in poliastro

To help you get started, we’ve selected a few poliastro examples, based on popular ways it is used in public projects.

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poliastro / poliastro / src / poliastro / bodies.py View on Github

Earth = _Earth()
Mars = _Mars()
Jupiter = _Jupiter()
Saturn = _Saturn()
Uranus = _Uranus()
Neptune = _Neptune()

Pluto = _Pluto()


class _Moon(_Body):
    parent = Earth
    k = constants.GM_moon
    name = "Moon"
    symbol = "\u263E"
    R = constants.R_moon
    R_mean = constants.R_mean_moon
    R_polar = constants.R_polar_moon
    mass = k / G

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        E1 = (125.045 - 0.0529921 * d) * u.deg
        E2 = (250.089 - 0.1059842 * d) * u.deg
        E3 = (260.008 + 13.0120009 * d) * u.deg
        E4 = (176.625 + 13.3407154 * d) * u.deg
        E5 = (357.529 + 0.9856003 * d) * u.deg
        E6 = (311.589 + 26.4057084 * d) * u.deg
        E7 = (134.963 + 13.0649930 * d) * u.deg
        E8 = (276.617 + 0.3287146 * d) * u.deg
        E9 = (34.226 + 1.7484877 * d) * u.deg
        E10 = (15.134 - 0.1589763 * d) * u.deg

poliastro / poliastro / src / poliastro / bodies.py View on Github

Mars = _Mars()
Jupiter = _Jupiter()
Saturn = _Saturn()
Uranus = _Uranus()
Neptune = _Neptune()

Pluto = _Pluto()


class _Moon(_Body):
    parent = Earth
    k = constants.GM_moon
    name = "Moon"
    symbol = "\u263E"
    R = constants.R_moon
    R_mean = constants.R_mean_moon
    R_polar = constants.R_polar_moon
    mass = k / G

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        E1 = (125.045 - 0.0529921 * d) * u.deg
        E2 = (250.089 - 0.1059842 * d) * u.deg
        E3 = (260.008 + 13.0120009 * d) * u.deg
        E4 = (176.625 + 13.3407154 * d) * u.deg
        E5 = (357.529 + 0.9856003 * d) * u.deg
        E6 = (311.589 + 26.4057084 * d) * u.deg
        E7 = (134.963 + 13.0649930 * d) * u.deg
        E8 = (276.617 + 0.3287146 * d) * u.deg
        E9 = (34.226 + 1.7484877 * d) * u.deg
        E10 = (15.134 - 0.1589763 * d) * u.deg
        E11 = (119.743 + 0.0036096 * d) * u.deg

poliastro / poliastro / src / poliastro / bodies.py View on Github

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = 272.76 * u.deg
        dec = 67.16 * u.deg
        W = (160.20 - 1.4813688 * d) * u.deg

        return ra, dec, W


class _Earth(_Body):
    parent = Sun
    k = constants.GM_earth
    name = "Earth"
    symbol = "\u2641"
    R = constants.R_earth
    R_mean = constants.R_mean_earth
    R_polar = constants.R_polar_earth
    mass = k / G
    J2 = constants.J2_earth
    J3 = constants.J3_earth
    H0 = constants.H0_earth
    rho0 = constants.rho0_earth

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = (0.00 - 0.641 * T) * u.deg
        dec = (90.00 - 0.557 * T) * u.deg
        W = (190.147 + 360.9856235 * d) * u.deg

        return ra, dec, W

poliastro / poliastro / src / poliastro / bodies.py View on Github

J3 = constants.J3_earth
    H0 = constants.H0_earth
    rho0 = constants.rho0_earth

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = (0.00 - 0.641 * T) * u.deg
        dec = (90.00 - 0.557 * T) * u.deg
        W = (190.147 + 360.9856235 * d) * u.deg

        return ra, dec, W


class _Mars(_Body):
    parent = Sun
    k = constants.GM_mars
    name = "Mars"
    symbol = "\u2642"
    R = constants.R_mars
    R_mean = constants.R_mean_mars
    R_polar = constants.R_polar_mars
    mass = k / G
    J2 = constants.J2_mars
    J3 = constants.J3_mars

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        M1 = (198.991226 + 19139.4819985 * T) * u.deg
        M2 = (226.292679 + 38280.8511281 * T) * u.deg
        M3 = (249.663391 + 57420.7251593 * T) * u.deg
        M4 = (266.183510 + 76560.6367950 * T) * u.deg
        M5 = (79.398797 + 0.5042615 * T) * u.deg

poliastro / poliastro / src / poliastro / bodies.py View on Github

- 0.00000571 * math.sin(M5.to("rad").value)
        ) * u.deg

        return ra, dec, W


class _Venus(_Body):
    parent = Sun
    k = constants.GM_venus
    name = "Venus"
    symbol = "\u2640"
    R = constants.R_venus
    R_mean = constants.R_mean_venus
    R_polar = constants.R_polar_venus
    mass = k / G
    J2 = constants.J2_venus
    J3 = constants.J3_venus
    ecc = 0.007 * u.one

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = 272.76 * u.deg
        dec = 67.16 * u.deg
        W = (160.20 - 1.4813688 * d) * u.deg

        return ra, dec, W


class _Earth(_Body):
    parent = Sun
    k = constants.GM_earth
    name = "Earth"

poliastro / poliastro / src / poliastro / bodies.py View on Github

ra = (299.36 + 0.70 * math.sin(N.to("rad").value)) * u.deg
        dec = (43.46 - 0.51 * math.cos(N.to("rad").value)) * u.deg
        W = (249.978 + 541.1397757 * d - 0.48 * math.sin(N.to("rad").value)) * u.deg

        return ra, dec, W


class _Pluto(_Body):
    parent = Sun
    k = constants.GM_pluto
    name = "Pluto"
    symbol = "\u2647"
    R = constants.R_pluto
    R_mean = constants.R_mean_pluto
    R_polar = constants.R_polar_pluto
    mass = k / G

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = 132.993 * u.deg
        dec = -6.163 * u.deg
        W = (302.695 + 56.3625225 * d) * u.deg

        return ra, dec, W


Mercury = _Mercury()
Venus = _Venus()
Earth = _Earth()
Mars = _Mars()
Jupiter = _Jupiter()

poliastro / poliastro / src / poliastro / bodies.py View on Github

dec = 67.16 * u.deg
        W = (160.20 - 1.4813688 * d) * u.deg

        return ra, dec, W


class _Earth(_Body):
    parent = Sun
    k = constants.GM_earth
    name = "Earth"
    symbol = "\u2641"
    R = constants.R_earth
    R_mean = constants.R_mean_earth
    R_polar = constants.R_polar_earth
    mass = k / G
    J2 = constants.J2_earth
    J3 = constants.J3_earth
    H0 = constants.H0_earth
    rho0 = constants.rho0_earth

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = (0.00 - 0.641 * T) * u.deg
        dec = (90.00 - 0.557 * T) * u.deg
        W = (190.147 + 360.9856235 * d) * u.deg

        return ra, dec, W


class _Mars(_Body):
    parent = Sun
    k = constants.GM_mars

poliastro / poliastro / src / poliastro / bodies.py View on Github

return ra, dec, W


class _Earth(_Body):
    parent = Sun
    k = constants.GM_earth
    name = "Earth"
    symbol = "\u2641"
    R = constants.R_earth
    R_mean = constants.R_mean_earth
    R_polar = constants.R_polar_earth
    mass = k / G
    J2 = constants.J2_earth
    J3 = constants.J3_earth
    H0 = constants.H0_earth
    rho0 = constants.rho0_earth

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = (0.00 - 0.641 * T) * u.deg
        dec = (90.00 - 0.557 * T) * u.deg
        W = (190.147 + 360.9856235 * d) * u.deg

        return ra, dec, W


class _Mars(_Body):
    parent = Sun
    k = constants.GM_mars
    name = "Mars"
    symbol = "\u2642"
    R = constants.R_mars

poliastro / poliastro / src / poliastro / bodies.py View on Github

W = (160.20 - 1.4813688 * d) * u.deg

        return ra, dec, W


class _Earth(_Body):
    parent = Sun
    k = constants.GM_earth
    name = "Earth"
    symbol = "\u2641"
    R = constants.R_earth
    R_mean = constants.R_mean_earth
    R_polar = constants.R_polar_earth
    mass = k / G
    J2 = constants.J2_earth
    J3 = constants.J3_earth
    H0 = constants.H0_earth
    rho0 = constants.rho0_earth

    @staticmethod
    def _rot_elements_at_epoch(T, d):
        ra = (0.00 - 0.641 * T) * u.deg
        dec = (90.00 - 0.557 * T) * u.deg
        W = (190.147 + 360.9856235 * d) * u.deg

        return ra, dec, W


class _Mars(_Body):
    parent = Sun
    k = constants.GM_mars
    name = "Mars"

poliastro / poliastro / src / poliastro / twobody / angles.py View on Github

ltan: ~astropy.units.Quantity
         Decimal hour between 0 and 24

    Returns
    -------
    RAAN: ~astropy.units.Quantity
        Right ascension of the ascending node angle in GCRS

    Note
    ----
    Calculations of the sun mean longitude and equation of time
    follow "Fundamentals of Astrodynamics and Applications"
    Fourth edition by Vallado, David A.
    """

    T_UT1 = ((epoch.ut1 - constants.J2000).value / 36525.0) * u.deg
    T_TDB = ((epoch.tdb - constants.J2000).value / 36525.0) * u.deg

    # Apparent sun position
    sun_position = coordinates.get_sun(epoch)

    # Calculate the sun apparent local time
    salt = sun_position.ra + 12 * u.hourangle

    # Use the equation of time to calculate the mean sun local time (fictional sun without anomalies)

    # sun mean anomaly
    M_sun = 357.5291092 * u.deg + 35999.05034 * T_TDB

    # sun mean longitude
    l_sun = 280.460 * u.deg + 36000.771 * T_UT1
    l_ecliptic_part2 = 1.914666471 * u.deg * np.sin(

How to use the poliastro.constants function in poliastro

To help you get started, we’ve selected a few poliastro examples, based on popular ways it is used in public projects.

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