Solar Spectrum: Rise, Set, and Space Weather
Sun Events Timetable
| Sunset/Sunrise | 17:20 | 05:07 | ||||||
| Civil Twighlight | 17:47 | 04:40 | ||||||
| Nautical Twighlight | 18:18 | 04:10 | ||||||
| Astronomical Night | 18:49 | 03:39 |
| Elevation at transit | 54° |
| Transit time | 11:14 |
| Distance to Earth | 0.99653 AU (149,078,766 km) |
Sun
Last update: Sun, 22 March 2026, 17:00
Current Sunspot and Flare Activity
The Sun currently displays 7 active sunspot regions visible from Earth, varying in size and magnetic complexity. This includes 5 newly detected sunspot regions (4399, 4401, 4402, 4400, 4398) in the past 24 hours.The largest sunspot is AR 4399, classified as Hax, covering 170 millionths of the solar hemisphere (MSH), and containing 3 individual spots.
No significant flares detected today. All data are current as of Sun, 22 March 2026 17:05, reflecting ongoing real-time monitoring of solar surface activity and flare emissions.
Recent Sunspots
4399
Sunspot Region
Spot count:
3
Area:
170
Coordinates:
S17E68
Class:
Hax
Magnetic Class:
A
AR 4399 is an Hax-class sunspot group that emerged on 2026-03-21 08:40. It covers 170 millionths of the solar disk and contains 3 individual spots.
4401
Sunspot Region
Spot count:
5
Area:
100
Coordinates:
N24E63
Class:
Dao
Magnetic Class:
B
AR 4401 is an Dao-class sunspot group that emerged on 2026-03-21 21:59. It covers 100 millionths of the solar disk and contains 5 individual spots.
4402
Sunspot Region
Spot count:
1
Area:
80
Coordinates:
N14E68
Class:
Hax
Magnetic Class:
A
AR 4402 is an Hax-class sunspot group that emerged on 2026-03-21 22:01. It covers 80 millionths of the solar disk and contains 1 spot.
4400
Sunspot Region
Spot count:
7
Area:
40
Coordinates:
S12W25
Class:
Dai
Magnetic Class:
BGD
AR 4400 is an Dai-class sunspot group that emerged on 2026-03-21 21:58. It covers 40 millionths of the solar disk and contains 7 individual spots.
4398
Sunspot Region
Spot count:
5
Area:
20
Coordinates:
S15E13
Class:
Cro
Magnetic Class:
B
AR 4398 is an Cro-class sunspot group that emerged on 2026-03-21 08:39. It covers 20 millionths of the solar disk and contains 5 individual spots.
Explore detailed sunspot data, including all active regions, classifications, and flare history
Real-Time Solar Imaging
The data used in these images are provided by the Solar Dynamics Observatory (SDO). The SDO is a mission of NASA’s Living With a Star (LWS) Program, designed to understand the causes of solar variability and its impacts on Earth. The Atmospheric Imaging Assembly (AIA) and Helioseismic and Magnetic Imager (HMI) instruments onboard SDO deliver high-resolution, real-time images of the sun in multiple wavelengths, which are essential for studying solar phenomena and predicting space weather. We gratefully acknowledge the efforts of the entire SDO team and NASA for making these invaluable data available to the public.
Magnetogram
HMI (Helioseismic and Magnetic Imager) magnetogram photos depict the sun's magnetic field strength and direction on its surface. These images, taken by the HMI instrument on the Solar Dynamics Observatory (SDO) satellite, reveal the intricate magnetic structures, including sunspots and active regions.
Intensitygram
HMI intensitygram photos display the sun's surface in visible light, highlighting features such as sunspots, granulation, and solar faculae. These images, captured by the HMI instrument aboard the Solar Dynamics Observatory (SDO), provide a detailed view of the sun's photosphere, allowing for the observation of sunspot development and movement.
Solar Magnetism: Coronal Loop Dynamics
These photos capture the sun in the 171 angstrom wavelength, highlighting the solar corona and upper transition region. These images, taken by the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO), reveal the structure of the sun's outer atmosphere and trace the magnetic field lines extending into space. The 171 Å wavelength is particularly effective at showing the million-degree plasma loops that emerge from the sun's surface.
Active Regions, Flares, and Coronal Holes
AIA 193 Å photos capture the sun in the 193 angstrom wavelength, focusing on both the hot corona and the cooler material of solar flares and coronal mass ejections (CMEs). These images reveal the sun's outer atmosphere and coronal holes, which are regions where the solar wind escapes into space. The 193 Å wavelength is particularly useful for observing the high-temperature plasma that forms in the corona, typically around 1.25 million Kelvin, and during solar flares, it can reach up to 20 million Kelvin.
Solar Passage Through Day
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Current Sun position
| Time | 17:37 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Sun elevation | -4° |
| Sun Azimuth | 86° |
Yearly Sunlight Dynamics
Sun Properties
| Date | Mon, 23 March 2026 |
| Twiglight begin | 18:18 |
| Twiglight end | 04:10 |
| Astrosession duration | 10h 52m |
| Elevation at transit | 54° |
| Transit time | 11:14 |
| Distance to Earth | 0.99653 AU (149,078,766 km) |
| Equatorial coordinates at midnight | RA: 00h 09m 11s", Dec: 00° 59' 46s |
| Constellation | Pisces |
Last and Upcoming Solar Eclipse
Tue, 17 February 2026
Hybrid Solar Eclipse
Global
93%
Local
-
| Global | From Your location | |
|---|---|---|
| Penumbra | 00:58-05:28 | Not Visible |
| Umbra | 02:43-03:44 | Not Visible |
Wed, 12 August 2026
Total Solar Eclipse
Global
100%
Local
-
| Global | From Your location | |
|---|---|---|
| Penumbra | 06:36-10:58 | Not Visible |
| Umbra | 07:59-09:36 | Not Visible |
Last and Upcoming Lunar Eclipse
Tue, 3 March 2026
Total Lunar Eclipse
Global
100%
Local
100%
| Global | From Your location | ||
|---|---|---|---|
| Penumbral | 23:46-05:24 | 23:46-05:24 | |
| Partial | 00:51-04:19 | 00:51-04:18 | |
| Total | 02:05-03:04 | 02:05-03:04 |
Fri, 28 August 2026
Partial Lunar Eclipse
Global
96.9%
Local
96.9%
| Global | From Your location | ||
|---|---|---|---|
| Penumbral | 16:26-22:02 | 17:35-22:02 | |
| Partial | 17:35-20:54 | 17:35-20:53 | |
| Total | - | - |
Aurora Activity
North
South
KP-index: 6.33. Moderate storm
Aurora Probabilty on Your Location: 0%
Astrometric & Physical Parameters of Sun
Coordinates & Visibility
| Right Ascension | 0.15325° |
| Declination | 0.99636° |
| Magnitude | -26.7 |
| Constellation | Pisces |
| Elevation | -3.9° |
| Azimuth | 85.7° |
Basic Properties
| Mass, kg | 1.98841E+30 |
| Mean density, g/cm³ | 1.408 |
Rotation
| Sidereal rotation period, days | 25.38 d |
Surface & Atmosphere
| Surface gravity, m/s² | 274.0 m/s^2 |
| Escape velocity, km/s | 617.7 |
| Mean temperature, K | 5772 |
Data Acknowledgment
Our solar system data—including planetary physical and orbital parameters—comes from the Solar System OpenData API , maintained by Le Système Solaire. We thank Christophe and the contributors for making this open data available.