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Celestial InformationWeather • Air Quality • Seismic Activity |
The sun's altitude and azimuth at local standard noon for every week of the year. The figure-eight is the sum of Earth's tilt and its elliptical orbit; the marked point is today.
The sun's track across today's sky, midnight to midnight, with a dot every hour; the moon's path is dashed. The bands below the horizon line are the civil, nautical and astronomical twilight depths.
| Azimuth | 208.6° |
| Altitude | 61.8° |
| Right ascension | 151.0° |
| Declination | 11.9° |
| Constellation | Leo |
| Start astronomical twilight | 4:55 AM |
| Start nautical twilight | 5:29 AM |
| Start civil twilight | 6:02 AM |
| Sunrise | 6:29 AM |
| Transit | 1:11 PM |
| Sunset | 7:52 PM |
| End civil twilight | 8:19 PM |
| End nautical twilight | 8:52 PM |
| End astronomical twilight | 9:26 PM |
A horizontal sundial cut for 37.43° N — the gnomon's shadow sweeps the true Palo Alto hour lines, east to the right. After sunset there is no shadow to cast.
The eclipse is the next one visible from Palo Alto, and its type is as seen from here — a station that catches only the penumbra of a total eclipse sees a partial.
Sundial time minus clock time at local standard noon, week by week — above the zero line the sundial runs ahead. The curve's two bulges are Earth's tilt and its elliptical orbit, the same pair that draws the analemma's figure-eight; the brass point is today.
Sunrise, sunset and solar noon for every week of the year, over the same twilight bands as the ladder above; the vertical line is today. Times are local clock time, so the daylight-saving steps in spring and fall are real; the dashed solar-noon curve carries the equation of time.