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.

Sun and Moon

How the Sun and the Moon look like today.

	R.A.	Decl.	Apparent Diameter	MagnitudeMag	ConstellationConst	Charts
radio_button_checked Sun	03h 53m 59s	+20° 16’ 57”	1,895.9”	-26.72 trending_flat	Taurus	map my_location
radio_button_checked Moon	22h 56m 03s	-08° 33’ 18”	1,916.7”	-9.67 trending_down	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
radio_button_checked Mercury	03h 12m 49s	+16° 55’ 49”	5.3”	-1.29 trending_up	Aries	map my_location
radio_button_checked Venus	00h 58m 19s	+04° 41’ 03”	27.2”	-4.52 trending_down	Pisces	map my_location
radio_button_checked Mars	09h 14m 03s	+17° 43’ 15”	5.8”	1.15 trending_up	Cancer	map my_location
radio_button_checked Jupiter	05h 41m 09s	+23° 10’ 01”	32.0”	-1.93 trending_flat	Taurus	map my_location
radio_button_checked Saturn	00h 02m 14s	-02° 00’ 34”	16.0”	1.12 trending_up	Pisces	map my_location
radio_button_checked Uranus	03h 41m 07s	+19° 23’ 36”	3.4”	5.85 trending_flat	Taurus	map my_location
radio_button_checked Neptune	00h 08m 06s	-00° 31’ 36”	2.2”	7.79 trending_flat	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.

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
radio_button_checked	C/2025 F2 (SWAN)	05h 14m 39s	-05° 31’ 24”	-	9.93	trending_down	Orion Ori	map my_location
radio_button_checked	C/2023 A3 (Tsuchinshan-ATLAS)	19h 56m 30s	+27° 02’ 20”	11.9	14.37	trending_down	Vulpecula Vul	map my_location
radio_button_checked	29P/Schwassmann-Wachmann	09h 41m 37s	+10° 18’ 59”	12.7	17.69	trending_flat	Leo Leo	map my_location
radio_button_checked	C/2021 G2 (Atlas)	15h 16m 50s	-05° 15’ 11”	13.7	14.87	trending_down	Libra Lib	map my_location
radio_button_checked	P/2010 H2 (Vales)	13h 09m 20s	+05° 07’ 49”	-	13.73	trending_flat	Virgo Vir	map my_location
radio_button_checked	C/2024 J2 (Wierzchos)	01h 32m 34s	+12° 03’ 09”	-	14.67	trending_down	Pisces Psc	map my_location
radio_button_checked	C/2023 H5 (Lemmon)	10h 37m 43s	+65° 29’ 32”	15.1	16.57	trending_flat	Ursa Major UMa	map my_location
radio_button_checked	C/2022 E2 (ATLAS)	01h 52m 47s	+49° 37’ 34”	-	15.37	trending_flat	Perseus Per	map my_location
radio_button_checked	C/2022 N2 (PANSTARRS)	01h 45m 23s	+15° 10’ 44”	-	15.48	trending_up	Pisces Psc	map my_location
radio_button_checked	C/2024 G3 (ATLAS)	02h 21m 39s	-51° 22’ 36”	-	15.67	trending_down	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
radio_button_checked	4 Vesta	14h 35m 15s	-03° 59’ 47”	5.88	trending_down	Virgo	map my_location
radio_button_checked	1 Ceres	00h 20m 21s	-07° 57’ 19”	9.28	trending_up	Cetus	map my_location
radio_button_checked	7 Iris	04h 07m 50s	+21° 48’ 45”	9.49	trending_up	Taurus	map my_location
radio_button_checked	6 Hebe	21h 58m 45s	-07° 05’ 04”	9.88	trending_up	Aquarius	map my_location
radio_button_checked	9 Metis	14h 56m 58s	-13° 59’ 34”	9.97	trending_down	Libra	map my_location
radio_button_checked	3 Juno	15h 37m 55s	-02° 11’ 55”	10.01	trending_down	Serpens	map my_location
radio_button_checked	2 Pallas	21h 06m 34s	+14° 55’ 16”	10.24	trending_up	Delphinus	map my_location
radio_button_checked	349 Dembowska	15h 03m 55s	-21° 47’ 55”	10.42	trending_down	Libra	map my_location
radio_button_checked	15 Eunomia	07h 16m 16s	+20° 20’ 23”	10.73	trending_down	Gemini	map my_location
radio_button_checked	5 Astraea	17h 16m 26s	-15° 07’ 32”	10.82	trending_up	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
radio_button_checked	Eta Aquariids	6 May	22h 30m	-01°	50	bright	1P/Halley	map
radio_button_checked	Daytime Arietids	7 Jun	02h 53m	+24°	50	medium	1566 Icarus ?	map