What the current planet position table shows
Planet Positions Today converts the same NASA/JPL Horizons state used by Solar System Live into a compact numerical table. Heliocentric longitude tells you the planet’s angle around the Sun in the ecliptic plane, while heliocentric latitude indicates how far it sits above or below that plane. The table also includes the instantaneous distance from the Sun, the distance from Earth and heliocentric speed.
Because the coordinate origin is the Sun, this is a Solar System geometry table rather than a right-ascension and declination chart for your local sky. If you want to know what is above your horizon tonight, use the linked Planets Visible Tonight page.
Why current positions are more useful than fixed diagrams
A textbook diagram can explain orbital order but it cannot show today’s configuration. Mercury and Venus move quickly, Earth changes the viewing geometry continuously, and the outer planets advance more slowly. A current state lets you see which planets lie on similar sides of the Sun, which are separated widely in heliocentric longitude and how the Earth-to-planet distance responds.
The table is refreshed from a shared data service and the epoch is displayed beside the source status. That timestamp is important whenever you compare values from different astronomy tools.
MercuryFrom vectors to readable astronomy values
JPL returns Cartesian position and velocity components. SpaceTracker.live derives distance using the three-dimensional vector magnitude and derives longitude and latitude from the same coordinates. Speed is converted from astronomical units per day to kilometres per second. Earth distance is obtained by subtracting Earth’s vector from each planet’s vector before taking the magnitude.
Those transformations are straightforward, but the source frame must remain consistent. The service therefore requests heliocentric ecliptic vectors for all eight planets and computes every row from the same epoch.
How to use this page with the 3D view
Open Solar System Live in another tab and select the same planet. The relative direction you see around the Sun corresponds to the longitude in this table, while the selected data panel shows the same distance family. This is a useful way to move between a visual model and quantitative measurements.
For event planning, continue to the Planetary Events Calendar. For local visibility, use Planets Visible Tonight. Each page answers a different layer of the same Solar System geometry.
Understanding the reference frame
Every astronomical position needs a reference frame. This page uses the ecliptic plane with the Sun at the origin because that frame makes planetary motion around the Solar System intuitive. The x and y components lie in the ecliptic plane and the z component measures displacement above or below it. SpaceTracker.live converts those Cartesian components into a longitude and latitude for the table while retaining the original three-dimensional distance calculation.
This is different from the equatorial right ascension and declination used on many star charts. Equatorial coordinates are tied to Earth’s equator and are ideal for pointing telescopes at the sky. Heliocentric ecliptic coordinates are better for seeing how the planets are arranged around the Sun. Neither system is “more correct”; they answer different questions.
EarthPosition is not the same as visibility
A planet can have a perfectly well-defined heliocentric position and still be impossible to observe from your location. For example, it may be below your horizon, too close to the Sun in the sky, or above the horizon only during daylight. Local visibility requires an observer position on Earth, local time, solar altitude and the planet’s apparent topocentric coordinates.
That is why SpaceTracker.live links this page to Planets Visible Tonight rather than mixing all of those calculations into one table. Use the position table to understand Solar System geometry and the observing tool to decide what you can actually see. The two pages complement one another without duplicating intent.
Data freshness and practical precision
The server reuses six-hour JPL vector buckets and advances the vector to the requested time with its supplied velocity. That architecture greatly reduces external API traffic while keeping a public visualization responsive. The live browser view is refreshed periodically, so a page that remains open for a long time receives a fresh authoritative state rather than extrapolating indefinitely.
For educational exploration, planet comparisons and current geometry this provides far more precision than a hand-coded circular orbit. Spacecraft navigation, occultation prediction and professional astrometry require the full Horizons configuration appropriate to that task, including observer, reference frame, aberration and light-time choices. SpaceTracker.live therefore shows its source and frame instead of implying that one table is suitable for every scientific purpose.
NeptuneHow heliocentric coordinates describe a planet
Imagine drawing a line from the Sun to a planet. Heliocentric longitude gives its direction in the ecliptic plane, and latitude records its displacement above or below that plane. The three-dimensional vector also gives the instantaneous solar distance. These quantities are useful for comparing positions across the Solar System, but they are not right ascension and declination for an observer on Earth.
The table uses one epoch for all eight planets. Compare Mercury’s rapidly changing longitude with Neptune’s much slower progress, then open Solar System Live to inspect the same configuration in 3D. A pair of similar longitudes does not mean the planets are physically adjacent: radial distance and latitude still determine their true separation.
Speed, reference frame and the changing Earth line
Heliocentric speed is the magnitude of the planet’s velocity relative to the Sun in the chosen reference frame. Inner planets generally travel faster in their orbits; each individual planet also varies in speed as its distance from the Sun changes. NASA’s planetary fact sheet lists characteristic orbital values, while the JPL Horizons reading here is tied to the time displayed above the table.
The Earth-distance column measures the length of the planet’s position vector after Earth’s vector has been subtracted. It does not represent the distance of a line drawn from the Sun, nor does it include an observer’s street address. For the same numbers in larger units, visit Planet Distance from Earth; for the purely heliocentric length, use Planet Distance from Sun.
What to check when two astronomy sites disagree
First compare timestamps and time zones. Planet positions change continuously, so a table calculated at midnight UTC can differ from one sampled several hours later. Next check the origin: heliocentric longitude around the Sun differs from geocentric coordinates as viewed from Earth. Finally inspect the unit, the coordinate plane and whether a displayed number is an instantaneous value or a long-term average.
SpaceTracker.live labels the source and epoch beside its live data. The underlying JPL Horizons documentation describes the state-vector service and its reference frames. If a service is unavailable, the table reports the loading problem; an unrelated static value should not be substituted for a current measurement. Planets Visible Tonight remains the appropriate tool for local sky visibility.
Reference: when planetary positions repeat
A position table is a snapshot. To see how geometry repeats, use the synodic period, the time between two identical alignments with the Sun as seen from Earth (for example, one opposition to the next).
| Planet | Time between successive alignments |
|---|---|
| Mercury | 115.9 days |
| Venus | 583.9 days (about 19 months) |
| Mars | 779.9 days (about 26 months) |
| Jupiter | 398.9 days |
| Saturn | 378.1 days |
| Uranus | 369.7 days |
| Neptune | 367.5 days |
Key planetary alignments, November 2026 to October 2027
These dates were calculated for this page with the Astronomy Engine library (UTC dates; elongations are angles from the Sun as seen from Earth). They are geometric alignments, not guarantees of a good view.
| Date (UTC) | Planet | Event |
|---|---|---|
| 20 Nov 2026 | Mercury | greatest western elongation, 19.6° (morning) |
| 25 Nov 2026 | Uranus | opposition |
| 3 Jan 2027 | Venus | greatest western elongation, 47.0° (morning) |
| 3 Feb 2027 | Mercury | greatest eastern elongation, 18.3° (evening) |
| 11 Feb 2027 | Jupiter | opposition |
| 19 Feb 2027 | Mars | opposition |
| 17 Mar 2027 | Mercury | greatest western elongation, 27.6° (morning) |
| 28 May 2027 | Mercury | greatest eastern elongation, 22.9° (evening) |
| 28 Sep 2027 | Neptune | opposition |
| 18 Oct 2027 | Saturn | opposition |
Heliocentric longitudes in the live table describe where a planet is around the Sun, not which direction it appears from your garden. When a planet’s longitude is close to Earth’s, it is near opposition (for an outer planet) and rises as the Sun sets.
Content last reviewed: 30 October 2026. Reference values are rounded; live figures in the tool above always take priority.
Related tools & authoritative sources
Continue from Solar System geometry to observing tools, calculators and primary astronomy references.
On SpaceTracker.live
Solar System Live →Planet Positions Today →Planet Distance from Earth →Planet Distance from Sun →Planets Visible Tonight →Planet Near the Moon →Planetary Events Calendar →Astronomy Space Calculators →Primary external references
NASA/JPL Horizons ↗JPL Horizons API documentation ↗NASA Solar System Exploration ↗NASA Planetary Fact Sheet ↗External sources open in a new tab. SpaceTracker.live remains an independent educational interface.
Frequently asked questions
What coordinate system is used?
The table uses heliocentric ecliptic state vectors, with the Sun at the origin. Longitude and latitude are derived from the current vector returned by NASA/JPL Horizons.
Why does Earth have no distance from Earth value?
Earth is the observer reference for that column, so its geocentric distance is zero and is shown as a dash in the position table.
How often does the current table update?
The page refreshes periodically. Server-side vector buckets are reused efficiently and advanced with the supplied velocity vector to the requested time.