TIME CORE

solar system

Heliocentric Ephemeris · Live

Planetary

Every world of Sol — eight planets, the major dwarf planets, and Selene. Distance and apparent magnitude are streamed from NASA JPL Horizons every 5 minutes; orbital phase is computed live from J2000.

Contacting Horizons…
Heliocentric Orbital Map
All eight planets · live J2000 phase · log-spaced radii
HELIOCENTRIC · LOG-SPACED · LIVE J2000 PHASE
Planetary Calendar
Live true-anomaly · 0° perihelion → 180° aphelion → 360° perihelion
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Next Apsis · Every Planet
Guaranteed next perihelion and aphelion for all 8 planets
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Upcoming Planetary Apsides
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Planets

Eight worlds of Sol
Mercury
0.387 AU · 47.36 km/s
φ -201.9°
Local Day
1407.60 h
Year
87.97 d
Local Clock
00:00
Axial Tilt
0.034°
Moons
0
Radius
2,439 km
Apparent Mag
Range-rate

Closest forge of Sol — a year is shorter than two of its days.

Venus
0.723 AU · 35.02 km/s
φ -247.6°
Local Day
↺ 5832.50 h
Year
224.70 d
Local Clock
00:00
Axial Tilt
177.4°
Moons
0
Radius
6,051 km
Apparent Mag
Range-rate

Retrograde rotation. The only planet where the sun rises in the west.

Earth
1.000 AU · 29.78 km/s
φ -304.4°
Local Day
23.93 h
Year
365.26 d
Local Clock
00:00
Axial Tilt
23.44°
Moons
1
Radius
6,371 km
Apparent Mag
Range-rate

PRV anchor — all TIME CORE timestamps reference Terran UTC.

Mars
1.524 AU · 24.07 km/s
φ -259.1°
Local Day
24.62 h
Year
686.97 d
Local Clock
01:29 MTC
Axial Tilt
25.19°
Moons
2
Radius
3,389 km
Apparent Mag
Range-rate

MTC sol = 24h 39m 35.244s. Mars Sol Date is live in Time Engines.

Jupiter
5.203 AU · 13.07 km/s
φ -79.7°
Local Day
9.93 h
Year
11.86 yr
Local Clock
00:00
Axial Tilt
3.13°
Moons
95
Radius
69,911 km
Apparent Mag
Range-rate

Fastest day in the system. Banded storms shift on hourly cycles.

Saturn
9.537 AU · 9.69 km/s
φ -228.2°
Local Day
10.66 h
Year
29.46 yr
Local Clock
00:00
Axial Tilt
26.73°
Moons
146
Radius
58,232 km
Apparent Mag
Range-rate

Ring resonance — Cassini Division at 2:1 with Mimas.

Uranus
19.190 AU · 6.81 km/s
φ 37.6°
Local Day
↺ 17.24 h
Year
84.02 yr
Local Clock
00:00
Axial Tilt
97.77°
Moons
28
Radius
25,362 km
Apparent Mag
Range-rate

Rolls on its side. Each pole gets 42 years of daylight.

Neptune
30.070 AU · 5.43 km/s
φ 128.3°
Local Day
16.11 h
Year
164.77 yr
Local Clock
00:00
Axial Tilt
28.32°
Moons
16
Radius
24,622 km
Apparent Mag
Range-rate

Supersonic winds — 2,100 km/h. One Neptunian year ≈ 165 Earth years.

Dwarf Planets

IAU recognised + Kuiper-belt giants
Ceres
2.766 AU · 17.91 km/s
φ -324.2°
Local Day
9.07 h
Year
4.60 yr
Local Clock
00:00
Axial Tilt
Moons
0
Radius
469 km
Apparent Mag
Range-rate

Largest object in the asteroid belt — surface water ice confirmed.

Pluto
39.480 AU · 4.74 km/s
φ 205.7°
Local Day
↺ 153.30 h
Year
247.94 yr
Local Clock
00:00
Axial Tilt
122.5°
Moons
5
Radius
1,188 km
Apparent Mag
Range-rate

Reclassified 2006. Mutually tidally locked with Charon.

Haumea
43.340 AU · 4.48 km/s
φ 238.9°
Local Day
3.92 h
Year
284.12 yr
Local Clock
00:00
Axial Tilt
Moons
2
Radius
816 km
Apparent Mag
Range-rate

Egg-shaped — fastest rotation of any large body in the solar system.

Makemake
45.790 AU · 4.42 km/s
φ 269.8°
Local Day
22.83 h
Year
309.88 yr
Local Clock
00:00
Axial Tilt
Moons
1
Radius
715 km
Apparent Mag
Range-rate

Methane-frosted Kuiper-belt object. Discovered 2005.

Eris
67.860 AU · 3.43 km/s
φ 313.0°
Local Day
25.90 h
Year
557.97 yr
Local Clock
00:00
Axial Tilt
Moons
1
Radius
1,163 km
Apparent Mag
Range-rate

Most massive dwarf planet — discovery triggered Pluto reclassification.

Dwarf Planet Apsides
Next perihelion & aphelion for Ceres, Pluto, Haumea, Makemake, Eris
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Moons

Major satellites tracked by TIME CORE
Selene · Luna
Earth's tidally-locked companion
φ 270.53° · 49.540319% lit
Phase
Last Quarter
Synodic Cycle
29.5306 d
Lunar Hour
00:00
Distance
384,400 km
Orbital Speed
1.022 km/s
Tidal Lock
Yes

Tidally locked to Earth. Anchors the lunisolar Selene Calendar.