1. Initial Configuration

• GPS: Click to auto-detect (HTTPS required).
• Manual: Enter Lat/Lon in the top inputs.
• Planning: Select a local time today or tomorrow to recalculate sky position, visibility and rise/set times.
• Now: Return immediately to real-time calculations.
• Save: Location, filters and planning time are stored locally in the browser.
• Data: Magnitudes and observation dates remain those of the latest source update.

2. Instrument & FOV

Select your scope to adjust Limit Mag and Map Field of View:

• S50: Limit 16.5, FOV 1.29°
• S30: Limit 15.4, FOV 1.90°

3. Reading Cards

• Purple (FRESH): Data < 10 days old.
• Green (OK): Standard data.
• Yellow (STALE): Data > 30 days old.

4. Physics Engine

Magnitudes are Estimated, not just measured:

• Non-Linear Decay: Models Type II drop & Type Ia fade.
• Zombie Filter: Removes unconfirmed objects > 120 days old.
• Galactic Extinction: Penalizes objects in the galactic plane.

5. Live Telemetry

Real-time calculations updated every 5s:

• Alt/Az: Current position.
• Arrows: ↗ Rising / ↘ Setting.
• Timers: Time remaining until set/rise (15° limit).

6. External Links

Sources: Rochester for supernovae and extragalactic novae; CBAT for recent Galactic nova candidates.