162173 Ryugu

Project home: Ryugu-00.zip Author: francisdrake Current version: 00 Compatibility: Orbiter 2016

Ryugu
Ryugu in Orbiter
Designation
Name	Ryugu
Reference body	Sun
Number of satellites	0
Planetary mean orbits
Epoch	2020.9596167
Semimajor axis (a)	1.78107351195385×1011 km (1.19057410625364 AU)
Eccentricity (e)	0.1909944
Inclination (i)	0.102690286265441 radian (5.88372°)
Longitude of the ascending node (LAN, ☊)	0 radian 0°
Rotational Elements
Sidereal Rotation Period	87133.4717273712 seconds (1.00848925610383 days)
Sidereal Rotation Offset	0
Selected physical parameters
Mean radius	450 m
Mass	7.24641539269111×10<su>10 kg
Equatorial gravity	0.0032 m/s-10
Orbital speed at surface	0.1034 m/s
Escape velocity	0.000147 m/s
Gravity at surface	Ryugu 1% Sun 99%
Note	*Elements given are from Ryugu.cfg file.

162173 Ryugu or in Orbiter simply Ryugu is near-Earth object of the Appolo group of small bodies, discovered by Lincoln Near-Earth Asteroid Research astronomers on 10 May 1999.

Ryugu is an add-on by francisdrake released in 2023 on the forum, and is compatible with Orbiter 2016. In Orbiter, Ryugu orbits the Sun with a semi-major axis of 1.19 AU, inclination of 0.1027 radians, and eccentricity of 0.19. Its gravity is very weak, even at the surface, in OrbitMFD, Ryugu's gravity is 1% and the Sun's gravity is 99%. A person could literally jump at greater than escape speed. Rotation is just over a day.

The landing surface (hard radius) is mostly below the visual surface, so most of the time landing on the hard surface will be below the visual. Landing inside will be sort of like being inside a cave looking at the backside of the skin of the body. If you're on the daylight side, you can see the sun kind of like looking at the sun through a thin cloud deck.

The landing light on the Delta-glider works on the visual surface of Ryugu, but not inside.

In popular culture

Ryugu is the setting of the novel Delta-T by Daniel Suarez depicting miners who explore this body.

Gallery

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  Orbits of the inner planets showing the orbit of Ryugu in white. From Wikimedia commons.