Mercury Discovered By | Known by the Ancients |

Date of Discovery | Unknown |

Orbit Size Around Sun (semi-major axis) | Metric: 57,909,227 km English: 35,983,125 miles Scientific Notation: 5.7909227 x 107 km (0.38709927 A.U.) By Comparison: Earth is 1 A.U. (Astronomical Unit) from the sun. |

Perihelion (closest) | Metric: 46,001,009 km English: 28,583,702 miles Scientific Notation: 4.600 x 107 km (3.075 x 10-1 A.U.) By Comparison: 0.313 x Earth |

Aphelion (farthest) | Metric: 69,817,445 km English: 43,382,549 miles Scientific Notation: 6.982 x 107 km (0.4667 A.U.) By Comparison: 0.459 x Earth Sidereal Orbit Period (Length of Year) 0.2408467 Earth years 87.97 Earth days By Comparison: 0.241 |

Orbit Circumference | Metric: 359,976,856 km English: 223,679,248 miles Scientific Notation: 3.600 x 108 km By Comparison: 0.383 x Earth |

Average Orbit Velocity | Metric: 170,503 km/h English: 105,946 mph Scientific Notation: 4.7362 x 104 m/s By Comparison: 1.590 x Earth |

Orbit Eccentricity |
0.20563593 By Comparison: 12.305 x Earth |

Orbit Inclination | 7.0 degrees |

Equatorial Inclination to Orbit | 0 degrees |

Mean Radius | Metric: 2,439.7 km English: 1,516.0 miles Scientific Notation: 2.4397 x 103 km By Comparison: 0.3829 x Earth |

Equatorial Circumference | Metric: 15,329.1 km English: 9,525.1 miles Scientific Notation: 1.53291 x 104 km |

Volume | Metric: 60,827,208,742 km3 English: 14,593,223,446 mi3 Scientific Notation: 6.08272 x 1010 km3 |

Mass | Metric: 330,104,000,000,000,000,000,000 kg Scientific Notation: 3.3010 x 1023 kg By Comparison: 0.055 x Earth’s |

Density | Metric: 5.427 g/cm3 By Comparison: 0.984 x Earth |

Surface Area | Metric: 74,797,000 km2 English: 28,879,000 square miles Scientific Notation: 7.4797 x 107 km2 By Comparison: 0.147 x Earth |

Surface Gravity | Metric: 3.7 m/s2 English: 12.1 ft/s2 |

Escape Velocity | Metric: 15,300 km/h English: 9,507 mph Scientific Notation: 4.25 x 103 m/s By Comparison: Escape Velocity of Earth is 25,030 mph |

Sidereal Rotation Period (Length of Day) | 58.646 Earth days 1407.5 hours |

Minimum/Maximum Surface Temperature | Metric: -173/427 English: -279/801 |

Atmospheric Constituents | By Comparison: Earth’s atmosphere consists mostly of N2, O2 |

referenced:

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NASA <--

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