chuk-mcp-celestial

Get rise, set, and transit times for a planet on a given day at a location.

Returns the times a planet rises above the horizon, transits the meridian (highest point), and sets below the horizon. Essential for planning when to observe a planet.

Args: planet: Planet name. One of: Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto date: Date in YYYY-MM-DD format (e.g., "2025-6-15") latitude: Observer's latitude in decimal degrees (-90 to 90) longitude: Observer's longitude in decimal degrees (-180 to 180) timezone: Timezone offset from UTC in hours (e.g., -8 for PST). When provided, event times are in local time. dst: Whether to apply daylight saving time adjustment.

Returns: PlanetEventsResponse: GeoJSON Feature containing: - geometry: Observer location - properties.data: - planet: Planet name - date: Query date - events: List of rise/set/transit events with times - constellation: Current constellation - magnitude: Apparent visual magnitude - artifact_ref: Reference to stored computation (if artifact store configured)

Tips for LLMs: - Events may be empty if the planet doesn't rise/set that day (polar regions) - Transit time is when the planet is highest — best viewing time - Use with get_planet_position to get full details at a specific time - Outer planets (Jupiter, Saturn) are above the horizon for ~12 hours - Inner planets (Mercury, Venus) are only visible near sunrise or sunset

Example: events = await get_planet_events( planet="Jupiter", date="2025-6-15", latitude=51.5, longitude=-0.1, timezone=1 ) for event in events.properties.data.events: print(f"Jupiter {event.phen} at {event.time}")