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Rare moon 44 EP

Phoebe

Position computed live · planets

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Live ephemeris

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Score breakdown

· 3 badges
44 pts · Rare
Rare 50 pts → Epic
  • Orbits backwards around its planet +20
  • Moon +16
  • Has a proper name +8
Total score 44

6 more points to reach Epic.

Badges

  • Moon · +16
  • Has a proper name · +8
  • Orbits backwards around its planet · +20

Trivia

What it actually is

  • Its address. It orbits about 9.54 AU from the Sun — roughly 9.5 times Earth's distance.
  • Around its planet. It circles its planet at a distance of 12.9 million km, roughly 33.7 times the Earth–Moon gap.

Sense of scale

  • Against our Moon. Smaller than our own Moon — about 6% of its width.
  • Ground to cover. Its whole surface adds up to about 142.5 thousand km² — roughly 90.7 times the area of Greater London.
  • Walk around it. Walking right round its equator, eight hours a day, would take about 16.7 days.

Time and light

  • Sunrise is late. Sunlight takes about 79.3 minutes to get there, against eight minutes to reach us.

Standing on it

  • Sunlight there. Sunlight is about 90.9 times weaker there than at Earth.
  • A year here. It rides around the Sun with its planet, one full lap every 29.5 Earth years.

Properties

color
#5a544e
diameter km
213
name
Phoebe
named
yes
radius km
106.5
retrograde orbit
yes
tidally locked
no

About Phoebe

Phoebe is a rare moon.

It orbits about 9.54 AU from the Sun — roughly 9.5 times Earth's distance.

How to see it

Like any astronomical target, Phoebe is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. Because it moves against the background stars, the live position panel on this page tracks where it is right now. The visibility panel above works out tonight's viewing window for your saved location.

Why Phoebe is a rare moon

Phoebe scores 44 points on Spacedle's rarity scale, which places it in the rare tier. Another 6 points would lift it into a rarer tier.

That score comes from 3 science badges — Moon, Has a proper name and Orbits backwards around its planet — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.