Exoplanet Transit Calculator
Find the next observable transit from your location
Ephemeris
Reference mid-transit (BJD_TDB)
Orbital period (days)
Transit duration (hours)
Total duration from ingress to egress
Target Star Coordinates
Right Ascension
HH:MM:SS.ss or decimal hours (e.g. 12.2244)
Declination
DD:MM:SS.ss or decimal degrees (e.g. 23.0557)
Observer Location
Latitude (°N)
Longitude (°E)
Elevation (m)
Timezone
IST (Asia/Kolkata)
EST (America/New_York)
CST (America/Chicago)
MST (America/Denver)
PST (America/Los_Angeles)
GMT (Europe/London)
CET (Europe/Berlin)
JST (Asia/Tokyo)
AEST (Australia/Sydney)
UTC
Use My Location
Observing Constraints
Minimum target altitude (°)
Sun altitude limit (°, e.g. -12)
Baseline before/after transit (min)
Extra time for out-of-transit baseline
Epochs to search
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