Ringworld parameters	38Sc1 SFRef
Parameters and technical specifications for Larry Niven's Ringworld.
Note.
This data is based on information in Larry Niven's Ringworld: Roleplaying adventure beneath the Great Arch [reference 1] . All appropriate figures are represented in SI units, with more conventional units following if appropriate.
Larry Niven's Ringworld.

Distance from Sol	1.90 Em = 201 ly
Distance above mean galactic plane	2.35 Em = 248 ly
Sun's spectral type	G3 Ve
Sun's population	I (galactic disk)
Sun's effective surface temperature	5600 K
Sun's mass	1.93 x 1030 kg = 0.970 solar
Sun's radius	680 Mm = 0.977 solar
Sun's luminosity	3.6 x 1026 W = 0.94 solar
Sun's absolute magnitude	+5.0
Shadow square number	20
Shadow square shape	rectangular
Shadow square width	~4.1 Gm
Shadow square height	~1.6 Gm
Shadow square area (each)	6.6 x 1018 m2
Shadow square area (total)	1.3 x 1020 m2
Shadow square spacing (average)	10 Gm
Shadow square ring radius	43.9 Gm = 0.293 au
Shadow square ring angular speed	5.11 x 10-6 rad/s
Shadow square ring rotation period	1.23 Ms = 14.2 d
Ringworld mass	2.1 x 1027 kg = 350 Earths
Ringworld radius	153 Gm = 1.02 au
Ringworld width	1.60 Gm
Rim wall height	~1600 km
Ringworld centripetal acceleration ("gravity")	9.73 m/s2 = 0.992 gee
Ringworld angular speed	7.98 x 10-6 rad/s
Ringworld rotation period	787 ks = 9.11 d
Ringworld tangential speed	1.22 Mm/s
Ringworld moment of inertia	4.9 x 1049 kg m2
Ringworld angular momentum	3.9 x 1044 kg m2/s
Ringworld rotational kinetic energy	1.6 x 1039 J
Ringworld atmospheric composition	N2 74%, O2 23%, Ar 2%, He 1%, trace elements < 1%
Scrith foundation thickness (average)	30 m
Scrith foamed meteor shielding thickness (average)	370 m
Tension stress induced in scrith foundation due to rotation	~7 x 1016 Pa

References.
1. Larry Niven's Ringworld: Roleplaying adventure beneath the Great Arch John Hewitt and Sherman Kahn Chaosium, Inc.	reference 1
Cross-references.
Physics reference: SI units      A comprehensive table of the base SI units.	28Rp3
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