Online Sky Maps and Accurate Ephemeris Computation for Solar System Objects
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Ephemeris Computation

Use the form below to compute ephemerides for any date and time and display the predicted positions in the sky. For most objects ephemeris data is available up to Jan 1st 2025.

Time: : UTC

Welcome to This site provides detailed sky maps and ephemerides for a selection of interesting Solar System objects and detailed finder charts for other important transient astronomical objects like the most recent supernovae.

Besides the individual sky maps for major Solar System objects (the 7 planets and the Sun), asteroids (31), comets (62) and spacecraft (7), this site includes an Online Planetarium feature which can be used to compute and visualize the positions of all the Solar System objects tracked by this site up to the year 2025.

Your feedback is extremely appreciated and very important in order to constantly improve and make this service more useful, so please tell us what you think!

Interesting Close Conjunctions Happening Now

In astronomy a conjunction is defined as a close apparent alignment in the sky between two or more celestial bodies. Here we list, in real time, the closest conjunctions happening between objects we are currently tracking, in order of increasing separation. The green arrow indicates that the objects are currently getting closer, while the red arrow means that the objects are increasing their apparent separation.

Object 1 Object 2 Separation
67P/Churyumov-Gerasimenko Rosetta Spacecraft 0° 00’ 15”
210P/Christensen Venus 0° 35’ 20”
15P/Finlay Nausikaa 0° 50’ 24”
Pluto New Horizons Spacecraft 1° 03’ 09”
Jupiter Thetis 1° 07’ 35”
119P/Parker-Hartley Apophys 1° 08’ 09”
40P/Vaisala 1 2013 TV135 1° 10’ 39”
134P/Kowal-Vavrova Saturn 1° 15’ 29”
Mars Maven Spacecraft 1° 18’ 43”

The Top 10 Brightest Comets Visible Now

These are the top 10 brightest comets currently visible in the sky, according to the computed ephemerides. Please keep in mind that, as comets are highly dynamic bodies, the magnitude reported here is an approximation that sometimes can be largely different from the actual value. Click on each line to go to the comet's detail page, or click the blue 'full screen' icon () to view an accurate deep sky chart showing the comet's current position in real time (see all the 62 tracked comets...).

Comet Magnitude Constellation
Comet C/2014 E2 (Jacques) 8.47 Cassiopeia
Comet C/2012 K1 (PANSTARRS) 8.69 Cancer
Comet C/2013 V5 (Oukaimeden) 8.70 Monoceros
Comet C/2013 A1 (Siding Spring) 9.55 Horologium
Comet 210P/Christensen 13.15 Cancer
Comet 290P/Jager 13.42 Crater
Comet C/2012 X1 (LINEAR) 13.44 Indus
Comet 134P/Kowal-Vavrova 14.61 Libra
Comet 29P/Schwassmann-Wachmann 1 14.93 Libra
Comet C/2014 Q2 (Lovejoy) 15.05 Puppis

The Top 10 Brightest Asteroids Visible Now

Click on each line to go to the asteroids's detail page, or click the blue 'full screen' icon () to view an accurate deep sky chart showing the asteroids's current position in real time (see all the 31 tracked asteroids...)..

Asteroid Magnitude Constellation
Asteroid Vesta 7.62 Libra
Asteroid Ceres 8.92 Virgo
Asteroid Victoria 9.11 Pegasus
Asteroid Hebe 9.23 Taurus
Asteroid Pallas 9.54 Virgo
Asteroid Juno 9.67 Gemini
Asteroid Psyche 9.68 Capricornus
Asteroid Iris 10.16 Cancer
Asteroid Irene 10.46 Microscopium
Asteroid Eunomia 10.56 Scorpius

The Major Planets in Order of Decreasing Brightness

Click on each line to go to the planet's detail page, or click the blue 'full screen' icon () to view an accurate deep sky chart showing the planet's current position in real time (go to the major bodies section...).

Planet Magnitude Constellation
Venus -3.85 Cancer
Jupiter -1.80 Cancer
Mercury -0.62 Leo
Mars 0.58 Libra
Saturn 1.38 Libra
Uranus 5.75 Pisces
Neptune 7.82 Aquarius