Astronomical database with 3D simulations, visualizations, computations, review, articles, and more.

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Sun & Moon Today

JD 2460799  DoY 123  WoY 18
🔼04:49
🔽18:32

TWILIGHT
03:14~20:06
Ecl Long 43.5°
in Aries

First quarter
Age 6.48 d
Phase 79.0°
Ecl Long 122.5°
in Cancer

SSE

Observable comet count is 1189

Current exoplanet count is 5885

Current longitude II of the GRS is  72°



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Impact Probablity of 2024 YR4:  Insignificant

Asteroid Size ProbabilityDate
2024 YR440—90 mInsignificant22 December 2032

Reference ESA

Please do not let this worry you. The asteroid has been detected just recently meaning that the orbital elements are not yet accurately determined, while they can alter any time due to gravitational pulls.


The risk corridor of 2024 YR4's possible impact locations runs from the Pacific Ocean to Northern South America, the Atlantic Ocean, central Africa, a corner of the Arabian peninsula, and then to northern India (Source Wikipedia).

 

 

Today Monitor

 


Planet Oppositions

Mars: January 16, 2025
Jupiter: January 10, 2026
Saturn: September 21, 2025
Uranus: November 21, 2025
Neptune: September 23, 2025

 

Greatest Elongation of Venus

Evening: January 10, 2025 at 47.2°E
Morning: June 1, 2025 at 45.9°W

 

Greatest Elongation of Mercury

Morning: December 25, 2024 at 22.0°W
Evening: March 8, 2025 at 18.2°E
Morning: April 21, 2025 at 27.4°W
Evening: July 4, 2025 at 25.9°E
Morning: August 19, 2025 at 18.6°W
Evening: October 29, 2025 at 23.9°E
Morning: December 7, 2025 at 20.7°W
Evening: Febrary 19, 2026 at 18.1°E



Comets to look out for:



Super Moons (full) 2025

Wednesday, 5 November
Friday, 5 December

 

given for 00:00 UT

In Longitude (negative is western)

DateSizeAgeAnglePhase
23 Feb 202530.61'24.48-6.502°
24 Feb 202531.06'25.48-6.683°
25 Feb 202531.54'26.48-6.463°
22 Mar 202530.16'21.97-6.602°
23 Mar 202530.54'22.97-7.220°
24 Mar 202531.00'23.97-7.497°
25 Mar 202531.50'24.97-7.380°
26 Mar 202532.03'25.97-6.841°
04 Apr 202531.86'5.546.674°
05 Apr 202531.40'6.547.159°
06 Apr 202530.97'7.547.233°
07 Apr 202530.58'8.546.935°
19 Apr 202530.14'20.54-6.609°
20 Apr 202530.49'21.54-7.247°
21 Apr 202530.91'22.54-7.602°
22 Apr 202531.38'23.54-7.618°
23 Apr 202531.89'24.54-7.248°
24 Apr 202532.39'25.54-6.459°
02 May 202532.05'4.196.908°
03 May 202531.53'5.197.524°
04 May 202531.04'6.197.652°
05 May 202530.59'7.197.335°
06 May 202530.21'8.196.642°
18 May 202530.56'20.19-6.624°
19 May 202530.92'21.19-6.950°
20 May 202531.32'22.19-7.010°
21 May 202531.75'23.19-6.758°
30 May 202532.13'2.876.436°
31 May 202531.63'3.877.137°
01 Jun 202531.12'4.877.336°
02 Jun 202530.65'5.877.064°
29 Jun 202531.11'3.566.528°
02 Oct 202530.80'10.17-6.602°
03 Oct 202531.28'11.17-6.712°
04 Oct 202531.79'12.17-6.413°
13 Oct 202532.01'21.176.426°
14 Oct 202531.60'22.177.017°
15 Oct 202531.20'23.177.219°
16 Oct 202530.83'24.177.068°
17 Oct 202530.51'25.176.617°
29 Oct 202530.28'7.48-6.622°
30 Oct 202530.70'8.48-7.213°
31 Oct 202531.18'9.48-7.461°
01 Nov 202531.71'10.48-7.298°
02 Nov 202532.24'11.48-6.672°
10 Nov 202532.23'19.487.097°
11 Nov 202531.72'20.487.804°
12 Nov 202531.23'21.488.024°
13 Nov 202530.78'22.487.808°
14 Nov 202530.39'23.487.230°
26 Nov 202530.27'5.72-6.459°
27 Nov 202530.63'6.72-7.095°
28 Nov 202531.05'7.72-7.447°
29 Nov 202531.52'8.72-7.439°
30 Nov 202532.02'9.72-7.008°
08 Dec 202532.44'17.726.680°
09 Dec 202531.91'18.727.561°
10 Dec 202531.38'19.727.916°
11 Dec 202530.87'20.727.788°
12 Dec 202530.43'21.727.247°
26 Dec 202531.06'5.93-6.615°
27 Dec 202531.43'6.93-6.624°

 

In Latitude (negative is southern)

DateSizeAgeAnglePhase
12 Jan 202531.85'12.07-6.565°
13 Jan 202531.60'13.07-6.448°
26 Jan 202530.57'26.076.621°
27 Jan 202530.96'27.076.622°
08 Feb 202531.60'9.48-6.682°
09 Feb 202531.36'10.48-6.624°
22 Feb 202530.21'23.486.703°
23 Feb 202530.61'24.486.800°
24 Feb 202531.06'25.486.559°
07 Mar 202531.74'6.97-6.762°
08 Mar 202531.39'7.97-6.766°
09 Mar 202531.05'8.97-6.404°
21 Mar 202529.85'20.976.665°
22 Mar 202530.16'21.976.852°
23 Mar 202530.54'22.976.721°
03 Apr 202532.33'4.54-6.682°
04 Apr 202531.86'5.54-6.784°
05 Apr 202531.40'6.54-6.493°
17 Apr 202529.65'18.546.506°
18 Apr 202529.86'19.546.754°
19 Apr 202530.14'20.546.698°
30 Apr 202532.98'2.19-6.438°
01 May 202532.55'3.19-6.675°
02 May 202532.05'4.19-6.485°
15 May 202529.78'17.196.605°
16 May 202529.99'18.196.587°
28 May 202532.97'0.87-6.528°
29 May 202532.60'1.87-6.460°
11 Jun 202529.82'14.876.526°
12 Jun 202530.02'15.876.530°
24 Jun 202532.85'27.87-6.457°
25 Jun 202532.68'28.87-6.502°
08 Jul 202529.84'12.566.561°
09 Jul 202530.07'13.566.600°
21 Jul 202532.45'25.56-6.493°
22 Jul 202532.38'26.56-6.624°
04 Aug 202529.76'10.206.646°
05 Aug 202529.99'11.206.748°
06 Aug 202530.28'12.206.541°
17 Aug 202532.23'23.20-6.553°
18 Aug 202532.11'24.20-6.755°
19 Aug 202531.94'25.20-6.550°
31 Aug 202529.61'7.756.661°
01 Sep 202529.78'8.756.848°
02 Sep 202530.05'9.756.733°
13 Sep 202532.46'20.75-6.508°
14 Sep 202532.22'21.75-6.794°
15 Sep 202531.95'22.75-6.665°
27 Sep 202529.47'5.176.540°
28 Sep 202529.56'6.176.805°
29 Sep 202529.74'7.176.779°
30 Sep 202530.01'8.176.453°
11 Oct 202532.77'19.17-6.687°
12 Oct 202532.41'20.17-6.652°
25 Oct 202529.42'3.486.651°
26 Oct 202529.52'4.486.681°
27 Oct 202529.69'5.486.423°
07 Nov 202533.37'16.48-6.472°
08 Nov 202533.10'17.48-6.565°
21 Nov 202529.39'0.726.513°
22 Nov 202529.46'1.726.567°
05 Dec 202533.44'14.72-6.511°
18 Dec 202529.42'27.726.502°
19 Dec 202529.48'28.726.570°

Source: NASA/GSFC

Lunar Calendar 2024

Lunar Libration Calendar 2024 (PDF
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0.0 MB)

View table online

Lunar Libration Calendar 2023 (PDF
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0.0 MB)

 


Latest Deepsky Image

2025-05-02, TS-71SDQ (450mm), Uranus-C (IMX585), LPR II, 88 x 120sec

 

Random Mini Poster

Cygnus Loop (Veil Nebula)

View all posters

 

Latest Planetary Image

2025-01-14, Celestron 8, Uranus-C, UV/IR-Cut filter

 

Latest Movie

2023-11-23, Celestron 8, Uranus-C, UV/IR-Cut filter, exposure 1h42m

 

Latest Constellation Image

D5300a, 135mm lens at f2.0, LPF II, 28 x 60s, ISO800.

 

Latest Lunar Image

C8, ASI290MM, IR642 filter (April 7, 2025).

 

Latest Astro Poster

Samyang 135mm, Uranus-C, dual-band and LPR filters.

 

Latest Infographic

Celestron 8 XLT, Uranus-C, UV/IR filter

 

Latest Lunar Poster

Celestron 8 XLT, Uranus-C, UV/IR filter

 

Astronomy Picture of the Day

Click to enlarge or show full screen

 


 

Source: apod.nasa.gov

Latest STScI News Release

Eye on Infinity: NASA Celebrates Hubble's 35th Year in Orbit

Composite shows portions of four Hubble images from left to right. First, the left half of Mars in shades of orange, blues, and browns. Second, a tiny portion of the Rosette Nebula shows very dark gray material against a translucent blue background. Third, a portion of planetary nebula NGC 2899 looks like the number three in shades of red and orange. Fourth, the center of barred spiral galaxy NGC 5335 has a milky yellow center that forms a bar surrounded by the beginnings of blue star-filled spiral arms.

April 23, 2025

Composite shows portions of four Hubble images from left to right. First, the left half of Mars in shades of orange, blues, and browns. Second, a tiny portion of the Rosette Nebula shows very dark gray material against a translucent blue background. Third, a portion of planetary nebula NGC 2899 looks like the number three in shades of red and orange. Fourth, the center of barred spiral galaxy NGC 5335 has a milky yellow center that forms a bar surrounded by the beginnings of blue star-filled spiral arms.

Source: stsci.edu/news

Tonight's Sky

Has been moved to YouTube

 

Latest JWST News

Webb uncovers possible hidden supermassive black hole in nearby spiral galaxy M83

M83 (MIRI image)

17 April 2025

Astronomers using the NASA/ESA/CSA James Webb Space Telescope have discovered evidence that suggests the presence of a long-sought supermassive black hole at the heart of the nearby spiral galaxy Messier 83 (M83). This surprising finding, made possible by Webb’s Mid-Infrared Instrument (MIRI), reveals highly ionised neon gas that could be a telltale signature of an active galactic nucleus (AGN), a growing black hole at the center of a galaxy.


Source: esawebb.org

JWST Picture of the Month

Infrared, optical, and X-ray views of a galaxy group

29 April 2025
This new Picture of the Month from the NASA/ESA/CSA James Webb Space Telescope features an astounding number of galaxies. The objects in this frame span an incredible range of distances, from stars within our own Milky Way, marked by diffraction spikes, to galaxies billions of light-years away. The star of this field is a group of galaxies, the largest concentration of which can be found just below the centre of this image. These galaxies glow with white-gold light. We see this galaxy group as it appeared when the Universe was 6.5 billion years old, a little less than half the Universe’s current age. The image on the left combines infrared data from both Webb and the NASA/ESA Hubble Space Telescope, showcasing the galaxy cluster against a backdrop of thousands of other galaxies. The image on the right adds X-ray data from ESA’s XMM-Newton space observatory and NASA’s Chandra X-ray Observatory …


Source: esawebb.org

NASA Image of the Day

Back to Earth

The Soyuz MS-26 spacecraft is pictured backing away from the International Space Station shortly after undocking from the Rassvet module on April 19, 2025. The Soyuz crew ship would parachute to a landing in Kazakhstan about three hours later returning NASA astronaut Don Pettit and Roscosmos cosmonauts Alexey Ovchinin and Ivan Vagner back to Earth after a 220-day space research mission.

Click to enlarge or show full screen

Fri, 02 May 2025 18:32 GMT


Source: www.nasa.gov

Astro Weather

 

 

 

No, we are not on Facebook but proudly on AstroBin with Mille Gracie to the author Salvatore Iovene:


GoTo Astropical on AstroBin

 

If anybody is interested in the night life of bats, here is a funny 1-minute MP4 video (24MB).

 


Lunar Imaging e-brochure (PDF 143.9 MB)

 

EAA e-brochure (PDF 76.4 MB) In work. Pre-release for feedbacks.

 

Planetary Imaging e-brochure (PDF 17.4 MB) In work. Pre-release for feedbacks.

 


Recent

1. Certain people appear to enjoy filling forms with random letters for no purpose but insane self-satisfaction. Most of this stupid folks leave their IP addresses which are forwarded to their provider companies. All so received forms are automatically deleted. Sadly, the world is overfilled with idiots, trolls and criminals. This is a public web site without any sensitive data. No need for these irrational displays.

2. Now in the process of changing all large images to AVIF or WEBP format resulting in considerably reduced file size and download time hardly sacrificing quality as compared with JPEG.

 

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This 'once-view' will work for most pages, such as Planisphere, Deepsky Observer, Ephemerides and Today Monitor.

 


US, Wisconsin, Saint Francis

Last visit from: US 
on page apscopes.php using Windows O/S.

Unique visitors today: 73 (since 0:00 UTC) from:
                                       

Newest flag:    -- Welcome!
Total page views 534 since 2025-05-01
from 40 different countries (excluding bots & idiots).

                                                                             

 

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Windows: 170
iPhone: 137
Macintosh: 123
Linux: 42
Android: 38
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iPad: 2

 

Most Visited

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algol.php: 35
crafts.php: 28
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exoplnt.php: 10
solsyst.php: 8
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Site Updates

 


Deepsky Overview
My Humble Gallery
Lunar Imaging
FOV Simulator
Astro Cameras
Let's Astrophoto
Telescopes for AP

 


 

Total Exoplanet Count: 5885

Kepler/K2: 3328 planets
TESS: 620 planets
Latest exoplanet around:  
as of 2025-04-21

ConstellationPegasus
Distance535.69 parsec
Magnitude12.67 vis.
Mass1.08 xSun
Radius1.375 xSun
Temperature5990°K
Known planet(s)1
View in Database | Star Chart | DSS IR Image 🔗

 


Acton Sky Portal Observatory 2
Anglo-Australian Telescope 35
Apache Point Observatory 2
Arecibo Observatory 3
Atacama Large Millimeter Array (ALMA) 1
Bohyunsan Optical Astronomical Observatory 26
Calar Alto Observatory 26
Cerro Tololo Inter-American Observatory 5
CHaracterising ExOPlanets Satellite (CHEOPS) 3
CoRoT 35
European Southern Observatory 3
European Space Agency (ESA) Gaia Satellite 13
Fred Lawrence Whipple Observatory 6
Gemini Observatory 13
Haleakala Observatory 2
HATNet 67
HATSouth 73
Haute-Provence Observatory 67
Hubble Space Telescope 6
Infrared Survey Facility 1
James Webb Space Telescope (JWST) 1
K2 547
KELT 10
KELT-North 7
KELT-South 4
Kepler 2781
Kitt Peak National Observatory 1
KMTNet 103
KOINet 1
La Silla Observatory 286
Large Binocular Telescope Observatory 3
Las Campanas Observatory 29
Leoncito Astronomical Complex 1
Lick Observatory 36
Lowell Observatory 3
Mauna Kea Observatory 3
McDonald Observatory 31
MEarth Project 2
MOA 31
Multiple Facilities 18
Multiple Observatories 325
NASA Infrared Telescope Facility (IRTF) 1
Next-Generation Transit Survey (NGTS) 21
OGLE 106
Okayama Astrophysical Observatory 36
Palomar Observatory 2
Paranal Observatory 30
Parkes Observatory 2
Qatar 10
Roque de los Muchachos Observatory 35
South African Radio Astronomy Observatory (SAR 1
SPECULOOS Southern Observatory 2
Spitzer Space Telescope 4
Subaru Telescope 11
SuperWASP 122
SuperWASP-North 5
SuperWASP-South 32
Teide Observatory 1
Thueringer Landessternwarte Tautenburg 8
Transiting Exoplanet Survey Satellite (TESS) 620
TrES 5
United Kingdom Infrared Telescope 2
University of Canterbury Mt John Observatory 1
Very Long Baseline Array 1
W. M. Keck Observatory 189
WASP-South 11
Wide-field Infrared Survey Explorer (WISE) Sat 1
Winer Observatory 1
Xinglong Station 2
XO 6
Yunnan Astronomical Observatory 3
Zwicky Transient Facility 2


 

⎘

Next NEO Approach

2024 JM2 on 2025-May-03 09:33 UTC at 7.1414 LD

 

⎘

Next Meteor Shower

Eta Aquariids
19 Apr - 28 May, Peak: 5/6
Radiant: Star Chart, Rating: bright

 

⎘

ISS Live Cameras

NOTE: You need to log in for correct data.

 

Random Objects

 

Polaris Australis (Sig Ser) in Ser [HIP 104382]

Distance: 270 light-years, Magnitude: 5.45

Sigma Octantis is also called 'Polaris Australis' for being the South Star and represents the State of Distrito Federal on the flag of Brazil. To an observer in the southern hemisphere, Sigma Octantis appears almost motionless and all the other stars in the Southern sky appear to rotate around it. It is part of a small "half hexagon" shape. It is over a degree away from the true south pole, and the south celestial pole is moving away from it due to precession of the equinoxes. The star is too dim for navigational purposes.

Star Chart | DSS IR Image 🔗

 

GJ 166 C (40 Eridani C) in Eridanus

Distance: 16 light-years, Magnitude: 11.2

40 Eridani C is a 11th magnitude red dwarf flare star, a variable designated DY Eridani.

Star Chart | DSS IR Image 🔗

 

M97 (Planetary Nebula) in Ursa Major

Magnitude: 12

M97 is a very unusual and dynamic planetary nebula spanning 3 light-years. Inside a 6,000 years old shell is a dying 16th magnitude star 0.7x the mass of our Sun.

Star Chart | DSS IR Image 🔗

 

Columba (southern), area rank: 54

Located southwest of Canis Major, this constellation depicts the shape of the letter T formed by 3rd-magnitude stars. Modelled after the dove in the Old Testimony, the constellation picture draws a dove holding a branch in its mouth.

Star Chart

 

246P/NEAT

246P/NEAT is a periodic comet discovered on 2004 March 28 by Near-Earth Asteroid Tracking (NEAT) using the 1.2-meter reflector at Haleakala. It was given the permanent number 246P on 2011 January 14. It is a Quasi-Hilda comet. Due to perturbations by Jupiter, the 2005, 2013 and 2021 perihelion passages will be closer to the Sun. The comet is observable all through its orbit. [Wikipedia]

 

 

Lachesis (Asteroid)

Semi-major: 3.11489 AU, Size: 175 km

Discovered by French astronomer Alphonse Borrelly on April 10, 1872, and independently by German-American astronomer Christian Heinrich Friedrich Peters on April 11, 1872, Lachesis is a C-type main belt asteroid it is probably composed of carbonaceous material. Lachesis has a axial rotation period of 46.551 hours with a brightness variation of 0.14 in magnitude. The asteroid has a mean mass of 5.5x1018kg.

 

 

S/2004 N1 (moon of Neptune)

Mark Showalter of the SETI Institute in Mountain View, Calif., found the moon July 1, 2013 while studying the segments of rings around Neptune in more than 150 archival Neptune photographs taken by Hubble from 2004 to 2009. Designated S/2004 N1, this smallest known moon of Neptune is no more than 20 km wide and so faint that it has been overlooked for many years although the Hubble images were in the public domain. S/2004 N1 appears to be traveling in a near-circular orbit very close to Neptune's equatorial plane.

 

 

HD 180617 b (in Aquila)

Mass: 0.0384293 xJup
SMA: 0.343 AU
Period: 105.911 days
Distance: 5.91059 parsec
Category: Warm Neptunian
ESI: 0.44

Star Chart | DSS IR Image 🔗

 

Android Astronomy Apps

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3D Visualizations

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Dark Site in Morocco

Some say that the seeing is better only in space.

Click on the banner to visit the new website of SaharaSky, the first and currently only private observatory with Casbah-style *** hotel in North Africa.

 

The owner, Fritz, is a German with a life-long passion for astronomy. Then, as he felt in deep love with Morocco and its wonderful people, he built a self-contained hotel at the feet of the Sahara about 30 kilometers to the southeast of the town of Zagora entirely in the traditional southern Moroccan Casbah-style and equipped it, besides comfortable rooms, a restaurant, spa and sauna, with a rich portfolio of optical instruments and accessories for amateur astronomers.

Fritz chose the location extremely well, a truly dark site in absence of city and street lights, blessed with an average of 300 clear dry nights annually. The observatory atop the hotel building offers a 360 degrees panoramic view on 500 square meters.

Most guests are professional and amateur astronomers, but also people of all ages with affection for the fascination of the stars and the desert. From the hotel's wide roof terrace, everybody can enjoy the starry sky dominated by the arch of the Milky Way with bare eyes or with rental telescopes and cameras.

The heart and soul of SaharaSky's observatory is Patrick from Belgium, not only a senior professional astronomer, but also a talented animator and entertainer under the Saharan stars.

A stay at SaharaSky is not limited to the night sky. SaharaSky provides equipment for solar observation, but Fritz also organises desert excursions for several days, overnight or day-return treks in a 4x4 or on dromedar backs, plus guided tours to historically invaluable local sites, such as the Petroglyphs of Ait Ouazzik.

Owner and staff as a team speak Arabic, local Berber, English, French, German, Spanish and Dutch.

Scotty, lock on to the coordinates of SaharaSky and beam us over!


SaharaSky owns telescopes with apertures from 40 to 400mm, such as Takahashi APOs, each of which can be saddled on high precision GM2000 mounts featuring GPS, GoTo and accurate guiding for both, visual observation and photography.

 

 

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