Tools you might need next
Calculate fishing line strength and leader size for target species, technique, and drag setting based on line type and test rating.
Estimate fish weight from length and girth measurements using species-specific formulas when you do not have a scale on the water.
Calculate optimal trolling speed in mph and knots for target fish species, lure type, and desired lure running depth on lakes or oceans.
Planetary positions are computed from orbital elements (VSOP87 theory) for the selected date and time, converted to local horizontal coordinates (altitude and azimuth).
Rise occurs when altitude crosses 0° above horizon; transit is maximum altitude; set is when altitude returns to 0°. Civil twilight (~−6° Sun altitude) defines practical viewing start.
Planets above 15° altitude are well placed for observing (minimal atmospheric distortion). Magnitude brighter than +4 is naked-eye visible; inner planets near inferior conjunction are lost in Sun glare.
Updated: July 2026
Jupiter at −2.2 mag transits 60° altitude at 9 PM. Saturn rises at 11 PM reaching 30° by midnight. Venus sets 45 minutes after sunset — low western horizon target.
Mars at 35° altitude at 10 PM clears rooftop obstructions. Filter results to planets above 20° to avoid buildings and light pollution near horizon.
Check when Jupiter exceeds 40° altitude for best seeing. Window: 8:30 PM to 1 AM. Mercury too low (<10°) at sunset — skip for imaging.
Planets low on the horizon are dimmed by atmosphere and hidden by buildings. Check transit time and wait until the planet exceeds 15–20° altitude.
Outer planets can be morning-only or below horizon for months. Inner planets have limited visibility windows. Use ephemeris data for your specific date and location.
Planet visibility changes nightly based on orbital position, your latitude, and local time. This calculator shows which planets are above the horizon tonight, their rise and set times, maximum altitude, and best viewing window from your location.