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Factbook · Thelxinoe

Thelxinoe at a glance

A one-card profile in the style of a national factbook. Every number links to its source or is labeled as a model assumption.

  • As of Oct 24, 2026
  • Sources 3

Thelxinoe

Jupiter XLII · S/2003 J 22

Introduction

Type
Irregular, retrograde moon of Jupiter; Group: Ananke group.Source: [1] Wikipedia
Discovery
Discovered: Images of Feb. 9, 2003; found in 2004; Discoverers: Scott S. Sheppard and Brett J. Gladman.Source: [1] Wikipedia, [2] NASA Science

Physical

Size
Diameter: ≈ 2 km.Source: [1] Wikipedia
Mass
Not measured in our sources.
Rotation
Not measured in our sources.
Surface composition
Not measured in detail in our sources.
Moons
None reported in our sources.

Orbit & access

Orbit
Mean distance: ≈ 21.0 million km from Jupiter; Orbital period: ≈ 621 days; Inclination: ≈ 151° (retrograde); Eccentricity: ≈ 0.23.Source: [3] NASA JPL Solar System Dynamics
Accessibility (Δv / travel time)
Model assumptionAbout 10.5 km/s of ideal Δv from low Earth orbit (6.30 km/s to depart + 4.17 km/s to arrive), and about 2.7 years for an ideal transfer.Model calculation from our Space Resource Intelligence (SRI) sample report: ideal transfer to the parent planet, then capture into this moon's orbit; no gravity assists. Real trajectories differ.
Mission history
No spacecraft visit is listed in our sources. What is known comes from telescopes.

Resources & economy

Believed resources
Model assumptionOur model looks at water / volatiles for propellant and life support. Usable fraction assumed at 0.02–0.1 of extracted material (bear to bull). Composition of small irregular moons is unmeasured; water content is a pure SRI assumption.SRI sample-model assumption, not a measurement.
Economic outlook
Model assumptionScientific value now; any resource value is long-horizon option value. Our sample model gives an NPV of about −$2,014M (bear), −$1,170M (base) and $2,594M (bull).Model output from our SRI sample valuation model (launch, product value, transit, extraction and discount-rate inputs are scenario assumptions, not forecasts). Not investment advice.
Business uses
Information products, science partnerships, and a (very long-shot) in-space resource case. See the Business page. Open →

Want the research behind these numbers? See Science. Thinking about the money side? See Business.