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Planetary & Lunar Worlds

Phobos vs Deimos

Empirical head-to-head comparison table, delta analysis, and interactive formula calculators.

Phobos

Category Planetary Moon
Parent Body Mars
Radius km 11.267
Oblateness 0.31
Sidereal Rotation h 7.65
Axial Tilt deg 0
Surface Gravity m s2 0.0057
Mean Distance AU 1.524
Atmospheric Composition None
VS

Deimos

Category Planetary Moon
Parent Body Mars
Radius km 6.2
Oblateness 0.3
Sidereal Rotation h 30.35
Axial Tilt deg 0
Surface Gravity m s2 0.003
Mean Distance AU 1.524
Atmospheric Composition None

📊 Delta & Performance Analysis

Direct comparative ratio of core numeric metrics between Phobos (Cyan) and Deimos (Gold).

Radius km: 11.267 vs 6.2 Δ +5.07
Oblateness: 0.31 vs 0.3 Δ +0.01
Sidereal Rotation h: 7.65 vs 30.35 Δ -22.7
Surface Gravity m s2: 0.0057 vs 0.003 Δ 0
Mean Distance AU: 1.524 vs 1.524 Δ 0

Solve Live Formulas with Interactive Tools

Run real-time calculations using our laboratory instruments, programmatic REST API, or raw CSV/JSON datasets.

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Frequently Asked Questions

What are the primary differences between Phobos and Deimos?

Phobos and Deimos represent distinct specifications within Planetary & Lunar Worlds. Reference the side-by-side data table above for exact empirical values.

Can I access this comparison data programmatically via API?

Yes. GemsMakers offers a high-speed, zero-authentication JSON REST API at https://gemsmakers.com/api/v1/calculate.php and downloadable datasets in both CSV and JSON formats under CC BY 4.0.