Kleopatra
(216) Kleopatra · discovered 1880 at Pola
Introduction
- Type
- Main-belt asteroid, Tholen M-type / SMASS Xe.Source: [1] NASA JPL Solar System Dynamics
- Discovery
- Discovered: April 10, 1880 by Johann Palisa at Pola (now Pula, Croatia).Source: [2] Wikipedia
Physical
- Size
- Mean diameter: ≈ 120–122 km (volume-equivalent); Dimensions: ≈ 276 × 94 × 78 km.Source: [2] Wikipedia, [1] NASA JPL Solar System Dynamics
- Mass
- Mass: (2.97 ± 0.32) × 10¹⁸ kg; Density: 3.38 ± 0.50 g/cm³.Source: [2] Wikipedia
- Rotation
- Rotation period: ≈ 5.39 hours.Source: [1] NASA JPL Solar System Dynamics
- Surface composition
- Not measured in detail in our sources.
- Moons
- Moons: Alexhelios (≈ 8.9 km, 2.7 d) and Cleoselene (≈ 6.9 km, 1.8 d).Source: [2] Wikipedia
Orbit & access
- Orbit
- Distance from Sun: 2.10–3.49 AU; Orbital period: ≈ 4.7 years; Inclination: ≈ 13.1°.Source: [1] NASA JPL Solar System Dynamics
- Accessibility (Δv / travel time)
- Model assumptionAbout 10.9 km/s of ideal Δv from low Earth orbit (4.92 km/s to depart + 5.99 km/s to arrive), and about 1.3 years for an ideal transfer.Model calculation from our Space Resource Intelligence (SRI) sample report: ideal two-impulse Hohmann transfer with a plane change, 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 in-space structural metal. Usable fraction assumed at 0.3–0.7 of extracted material (bear to bull). Bounded by bulk metal content, which is not measured directly for this body; M-type class and density are the only evidence.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 −$2,073M (bear), −$100M (base) and $27,397M (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 →