Afrho

class sbpy.activity.Afrho[source]

Bases: sbpy.activity.dust.DustComaQuantity

Coma dust quantity for scattered light.

Afrho objects behave like Quantity objects with units of length.

Parameters
valuenumber, Quantity

The value(s).

unitstring, Unit, optional

The unit of the input value. Strings must be parseable by units package.

dtypedtype, optional

See Quantity.

copybool, optional

See Quantity.

Notes

Afρ is the product of dust albedo, dust filling factor, and circular aperture radius. It is nominally a constant for a steady-state coma in free expansion. See A’Hearn et al. (1984) for details.

References

A’Hearn et al. 1984, AJ 89, 579-591.

Examples

>>> from sbpy.activity import Afrho
>>> print(Afrho(1000, 'cm'))
1000.0 cm