Astronomy Tools

Kinder Web

Kinder

Distance & Magnitude Calculator

Calculate distances and absolute magnitudes from redshift data

H₀ = 67.7 · Ω_m = 0.309 · T_CMB = 2.725 K [Planck 2018]

Redshift (z) *

Redshift error (optional)

Apparent magnitude (m)

Extinction (A)

Distance Unit

Enter redshift value and click Calculate to see results

Coordinate Conversion

Convert between different coordinate formats

Right Ascension (RA)

RA (hh:mm:ss)

RA (Decimal °)

Declination (DEC)

DEC (±dd:mm:ss)

DEC (Decimal °)

RA result will appear here

DEC result will appear here

Date Conversion

Convert between different astronomical date formats

Modified Julian Date (MJD)

Julian Date (JD)

Common Date

Enter any date format to see conversions

LC Plotter — Interactive Data Plotter

Upload CSV / TXT / DAT files and build fully customisable plots. Light-curve mode: absolute magnitude (z), phase axis (explosion time), filter auto-color, upper limits ▽, click-to-star ★ markers, per-series shapes & lines.

Open LC Plotter

Exposure Time Calculator — CASTOR Engine

Solve for signal-to-noise ratio or required exposure time for point and extended sources. Configure telescope, camera, and filter parameters (with LOT / SLT hardware presets), then compute single values or full array-mode curves.