The Sun Ephemeris Calculator
Compute the position of The Sun for any date and time between 1 January 1600 and 30 December 2499 and display the results on an interactive star map.
In Evidence
The Sun
The Sun is the star at the center of the solar system and is by far the largest object in it. It has a diameter of about 1.39 million kilometers and a mass of approximately 1.99 x 10^30 kilograms, accounting for about 99.86% of the total mass of the solar system. The Sun is a nearly perfect sphere of hot plasma, with internal convective motion that generates its magnetic field. The temperature at the Sun's core is about 15 million degrees Celsius, where nuclear fusion occurs, releasing energy in the form of electromagnetic waves and heat. This energy is radiated outwards, and it takes about 8 minutes and 20 seconds for it to reach Earth, which is about 149.6 million kilometers away. The Sun rotates on its axis, completing one rotation in about 25.4 Earth days near the equator and about 34 Earth days near the poles. The Sun is classified as a G-type main-sequence star, with a lifespan of about 10 billion years, and it has a complex system of magnetic activity that produces sunspots, flares, and coronal mass ejections that can affect Earth's space environment. The Sun has been studied extensively by a variety of telescopes and spacecraft, including the Solar and Heliospheric Observatory (SOHO) and the Parker Solar Probe.
The Sun is currently in the constellation of Taurus.
The current Right Ascension of The Sun is 04h 37m 47s and the Declination is +22° 05’ 23” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom ). The current magnitude of The Sun is -26.71 (JPL).
Today's rise, transit and set times of The Sun from Greenwich, United Kingdom (all times relative to the local timezone Europe/London):
- Sun is below the horizon from Greenwich, United Kingdom .
- Go to interactive sky chart
If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.
Today Sunspots Activity
Here is a recent image of the Sun's surface showing the current sunspot activity:
The Sun Position and Finder Charts
Below we provide The Sun finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.
Higher precision deep sky finder chart, 60 arcmin wide, showing where The Sun is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is The Sun?, a page that provides all the information needed to find The Sun in the sky and additional links to sky charts.
The Sun Distance from Earth
The distance of The Sun from Earth is currently 151,696,570 kilometers, equivalent to 1.014029 Astronomical Units. Light takes 8 minutes and 26.0053 seconds to travel from The Sun and arrive to us.
The following chart shows the distance of The Sun from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.
The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of Sun from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest Approach of The Sun to Earth
Between 1 January 1600 and 30 December 2499, the closest approach of The Sun to Earth happens on Tue Dec 27 1605 at a distance of 0.983059 Astronomical Units, or 147,063,549 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
The Sun Brightness and Light Curve
The following chart is the predicted light curve (visual magnitude as a function of time) of The Sun, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.
The Sun Physical Data
The following shows the known values of the most important physical parameters of The Sun. Source: JPL Small-Body Database
| Physical Parameter | Value | Relative to Earth |
|---|---|---|
| Diameter | 1391684 km | 109.2202 |
| Mass | 1989000 x 1024 kg | 333,043.6574 |
| Density | 1.41 gr/cm3 | 0.2557 |
| Escape Velocity | 618.02 km/s | 55.2297 |
| Sideral Rotation | 587.2800 hours | 24.5370 |
| Absolute Magnitude | -26.8 |
The Sun 15 Days Ephemeris
The following table lists the ephemerides of The Sun computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate The Sun in our Online Planetarium at the chosen date.
| Date | Right AscensionR.A. | DeclinationDec. | MagnitudeMag | Apparent DiameterDiameter | Constellation |
|---|---|---|---|---|---|
| 2023 May 26 | 04h 08m 52s | +20° 58’ 59” | -26.71 | 1,894.4” | Taurus |
| 2023 May 27 | 04h 12m 55s | +21° 09’ 29” | -26.71 | 1,894.1” | Taurus |
| 2023 May 28 | 04h 16m 58s | +21° 19’ 36” | -26.71 | 1,893.8” | Taurus |
| 2023 May 29 | 04h 21m 02s | +21° 29’ 22” | -26.71 | 1,893.5” | Taurus |
| 2023 May 30 | 04h 25m 06s | +21° 38’ 47” | -26.71 | 1,893.2” | Taurus |
| 2023 May 31 | 04h 29m 11s | +21° 47’ 48” | -26.71 | 1,892.9” | Taurus |
| 2023 Jun 01 | 04h 33m 15s | +21° 56’ 26” | -26.71 | 1,892.6” | Taurus |
| 2023 Jun 02 | 04h 37m 22s | +22° 04’ 41” | -26.71 | 1,892.3” | Taurus |
| 2023 Jun 03 | 04h 41m 27s | +22° 12’ 33” | -26.71 | 1,892.0” | Taurus |
| 2023 Jun 04 | 04h 45m 33s | +22° 20’ 03” | -26.71 | 1,891.8” | Taurus |
| 2023 Jun 05 | 04h 49m 40s | +22° 27’ 07” | -26.71 | 1,891.5” | Taurus |
| 2023 Jun 06 | 04h 53m 47s | +22° 33’ 51” | -26.71 | 1,891.2” | Taurus |
| 2023 Jun 07 | 04h 57m 55s | +22° 40’ 09” | -26.71 | 1,891.0” | Taurus |
| 2023 Jun 08 | 05h 02m 02s | +22° 46’ 04” | -26.71 | 1,890.7” | Taurus |