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Astronomy Tools
18 tools in this collection. Choose a task below or search the complete FeuTex toolkit.
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Apparent Angular Diameter
Calculate the angle subtended by a circular object of known diameter and distance.
Open tool →AstronomyAstrophotography Pixel Sampling
Compare angular pixel scale with seeing and estimate pixels across a target.
Open tool →AstronomyAstrophotography Stack Signal-to-Noise
Estimate stacked signal-to-noise from source, background, dark current and read noise.
Open tool →AstronomyBlackbody Peak and Surface Flux
Estimate peak wavelength and emitted power per unit area for an ideal blackbody.
Open tool →AstronomyCircular Orbit Profile
Calculate orbital velocity, period and specific energy around a specified body.
Open tool →AstronomyCombined Stellar Magnitude
Combine the apparent brightness of two unresolved stars.
Open tool →AstronomyElliptic Orbit Apsides
Find eccentricity, semimajor axis and speed at the near and far points of an orbit.
Open tool →AstronomyExoplanet Transit Depth
Estimate the fraction of stellar light blocked by a smaller opaque planet.
Open tool →AstronomyHohmann Transfer Budget
Estimate two impulsive burns and coast time between coplanar circular orbits.
Open tool →AstronomyOrbital Plane Change Burn
Estimate an ideal impulsive plane change at a selected orbital speed.
Open tool →AstronomyPlane-Parallel Airmass Estimate
Estimate atmospheric path length relative to the zenith at moderate altitude.
Open tool →AstronomySpectral Line Redshift
Calculate redshift and radial velocity using both small-shift and relativistic formulas.
Open tool →AstronomyStellar Distance Modulus
Infer stellar distance from apparent and absolute magnitude with an extinction allowance.
Open tool →AstronomyStellar Luminosity from Radius and Temperature
Estimate luminosity relative to the Sun under a spherical blackbody model.
Open tool →AstronomySynodic Alignment Period
Estimate the time between repeated alignments of two bodies with constant orbital periods.
Open tool →AstronomyTelescope Eyepiece Performance
Compare eyepiece magnification, exit pupil and approximate true field of view.
Open tool →AstronomyTelescope Obstruction and Light Collection
Estimate clear collecting area and the fractional loss from a central obstruction.
Open tool →AstronomyTidal Acceleration Difference
Estimate the leading-order radial tidal acceleration across a short object.
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