Highlights
- The Sun is in Taurus, the Moon is Waning Crescent in Aquarius
- T CrB: magnitude
10.09 ± 0.001 [2025-05-21 00:21:02 UTC, CCD/V, DPAH/AAVSO] - Comet C/2025 F2 (SWAN):
magnitude
9.93 in Orion - Comet C/2023 A3 (Tsuchinshan-ATLAS):
magnitude
11.9 in Vulpecula - Comet 29P/Schwassmann-Wachmann:
magnitude
12.7 in Leo -
Next NEO approach:
Asteroid (NEO) 2025 KF,
May 21 2025 at 17:26 UTC,115,132 km,0.30 lunar distances - Asteroid 3 Juno is close to opposition
- Asteroid 9 Metis is close to opposition
- Asteroid 349 Dembowska (1892 T) is close to opposition
Popular Objects
Popular objects during the last 7 days based on the number of visualizations.
The Solar System
Current positions of the major bodies of the Solar System and the brightest comets.
Sun and Moon
How the Sun and the Moon look like today.
R.A. | Decl. | Apparent Diameter | MagnitudeMag | ConstellationConst | Charts | |
---|---|---|---|---|---|---|
Sun | 03h 53m 59s | +20° 16’ 57” | 1,895.9” | -26.72 | Taurus | map my_location |
Moon | 22h 56m 03s | -08° 33’ 18” | 1,916.7” | -9.67 | Aquarius | map |
The Planets
Current essential information about the planets. Click each planet to view full details.
Planet | R.A. | Decl. | Diameter | MagnitudeMag | ConstellationConst | Charts |
---|---|---|---|---|---|---|
Mercury | 03h 12m 49s | +16° 55’ 49” | 5.3” | -1.29 | Aries | map my_location |
Venus | 00h 58m 19s | +04° 41’ 03” | 27.2” | -4.52 | Pisces | map my_location |
Mars | 09h 14m 03s | +17° 43’ 15” | 5.8” | 1.15 | Cancer | map my_location |
Jupiter | 05h 41m 09s | +23° 10’ 01” | 32.0” | -1.93 | Taurus | map my_location |
Saturn | 00h 02m 14s | -02° 00’ 34” | 16.0” | 1.12 | Pisces | map my_location |
Uranus | 03h 41m 07s | +19° 23’ 36” | 3.4” | 5.85 | Taurus | map my_location |
Neptune | 00h 08m 06s | -00° 31’ 36” | 2.2” | 7.79 | Pisces | map my_location |
Jupiter Moons
Position of the Galilean satellites of Jupiter. A dedicated tool is available, with more advanced features.

List of 5 upcoming phenomena of Jupiter's satellites:
Date | Local Time | Satellite | Event |
---|---|---|---|
May 21 | 21:50 | Io | Begin Occultation |
May 22 | 00:37 | Io | End Eclipse |
May 22 | 03:59 | Europa | Begin Transit |
May 22 | 05:05 | Europa | Begin Shadow Transit |
May 22 | 06:38 | Europa | End Transit |
To see the complete list of the upcoming phenomena for the next 7 days consult the dedicated Jupiter's Galilean Moons section.
Saturn Moons & Rings
Inclination of the rings of Saturn and positions of major satellites. A dedicated tool is available, with more advanced features.

Apparent Planet Sizes
Comparison between the apparent size of the planets, measured in seconds of a degree, as they appear today.

5.3”

27.2”

5.8”

32.0”

16.0”

3.4”

2.2”
Credits for the planet images: NASA-APL - NASA.
Brightest Comets
List of the 10 brightest comets (open the full list of 243 comets).
Comet | R.A. | Decl. | Magnitude (COBS)Mag Obs | Magnitude (JPL)Mag Pred | ConstellationConst | Charts | ||
---|---|---|---|---|---|---|---|---|
C/2025 F2 (SWAN) | 05h 14m 39s | -05° 31’ 24” | - | 9.93 | Orion Ori | map my_location | ||
C/2023 A3 (Tsuchinshan-ATLAS) | 19h 56m 30s | +27° 02’ 20” | 11.9 | 14.37 | Vulpecula Vul | map my_location | ||
29P/Schwassmann-Wachmann | 09h 41m 37s | +10° 18’ 59” | 12.7 | 17.69 | Leo Leo | map my_location | ||
C/2021 G2 (Atlas) | 15h 16m 50s | -05° 15’ 11” | 13.7 | 14.87 | Libra Lib | map my_location | ||
P/2010 H2 (Vales) | 13h 09m 20s | +05° 07’ 49” | - | 13.73 | Virgo Vir | map my_location | ||
C/2024 J2 (Wierzchos) | 01h 32m 34s | +12° 03’ 09” | - | 14.67 | Pisces Psc | map my_location | ||
C/2023 H5 (Lemmon) | 10h 37m 43s | +65° 29’ 32” | 15.1 | 16.57 | Ursa Major UMa | map my_location | ||
C/2022 E2 (ATLAS) | 01h 52m 47s | +49° 37’ 34” | - | 15.37 | Perseus Per | map my_location | ||
C/2022 N2 (PANSTARRS) | 01h 45m 23s | +15° 10’ 44” | - | 15.48 | Pisces Psc | map my_location | ||
C/2024 G3 (ATLAS) | 02h 21m 39s | -51° 22’ 36” | - | 15.67 | Eridanus Eri | map my_location |
We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.
Brightest Asteroids
List of the 10 brightest asteroids (open the full list of 78 asteroids and dwarf planets.)
Asteroid | R.A. | Decl. | MagnitudeMag | ConstellationConst | Charts | ||
---|---|---|---|---|---|---|---|
4 Vesta | 14h 35m 15s | -03° 59’ 47” | 5.88 | Virgo | map my_location | ||
1 Ceres | 00h 20m 21s | -07° 57’ 19” | 9.28 | Cetus | map my_location | ||
7 Iris | 04h 07m 50s | +21° 48’ 45” | 9.49 | Taurus | map my_location | ||
6 Hebe | 21h 58m 45s | -07° 05’ 04” | 9.88 | Aquarius | map my_location | ||
9 Metis | 14h 56m 58s | -13° 59’ 34” | 9.97 | Libra | map my_location | ||
3 Juno | 15h 37m 55s | -02° 11’ 55” | 10.01 | Serpens | map my_location | ||
2 Pallas | 21h 06m 34s | +14° 55’ 16” | 10.24 | Delphinus | map my_location | ||
349 Dembowska | 15h 03m 55s | -21° 47’ 55” | 10.42 | Libra | map my_location | ||
15 Eunomia | 07h 16m 16s | +20° 20’ 23” | 10.73 | Gemini | map my_location | ||
5 Astraea | 17h 16m 26s | -15° 07’ 32” | 10.82 | Ophiuchus | map my_location |
Active Meteor Showers
List of the currently active meteor showers.
Name | Peak | Radiant R.A. | Radiant Decl. | ZHR ⓘ | Rating | Parent Object | Charts | |
---|---|---|---|---|---|---|---|---|
Eta Aquariids | 6 May | 22h 30m | -01° | 50 | bright | 1P/Halley | map | |
Daytime Arietids | 7 Jun | 02h 53m | +24° | 50 | medium | 1566 Icarus ? | map | |