Sawyers World - Revision history

Alastair: /* Physical Characteristics */ add detail from private wiki

2019-07-12T01:00:14Z

Physical Characteristics: add detail from private wiki

Alastair: /* Clock and Calendar */ add updates from private wiki

2019-07-12T00:58:37Z

Clock and Calendar: add updates from private wiki

Alastair: add some detail, headings

2017-05-31T03:53:38Z

add some detail, headings

Alastair: /* Sources */

2017-05-31T03:48:13Z

Sources

Alastair: /* Sawyers World */

2017-04-27T04:02:05Z

Sawyers World

Alastair: /* Sawyers World */ add time

2017-04-27T03:53:52Z

Sawyers World: add time

Alastair: Created

2016-10-27T03:54:44Z

Created

New page

== Sawyers World ==
Habitable planet orbiting Alpha Centauri A, (Alpha Centauri A II)

First extra-solar planet settled by humans (but not first landed upon, see [[Kakuloa]]).

* Largest city: Sawyer City

* Rotation: 25h 44m 17s (solar, ie noon to noon)
* Calendar: week = 5 26-hour days plus 2 25-hour days, with every 4th weekend having an extra hour.
* Radius: slightly larger than Earth, about 1.05 E, 8400 miles diameter (8320 miles)
* Density: slightly lower than Earth, about 5.2 gm/cm3, similar to Venus (5.23 gm/cm3)
* Gravity: slightly lower than Earth, about 0.99 g (9.7 m/sec2) (0.986 g, 9.682 m/sec2)
(But escape velocity slightly higher, due to 1/r-squared: 11.42 km/sec vs 11.18 km/sec, and get a 0.41 km/sec boost from rotation at equator (vs 0.44 on Earth)
** Specifically, Ve = 11.49 km/sec, rotation boost = 0.45 km/sec at equator, 0.32 at 45 deg lat.

==Sources==
* The Chara Talisman ("we're here 26 hours a day")
* Alpha Centauri, First Landing (discussion of planetary parameters on initial survey)

@@ Line 12: / Line 12: @@
 Time
 * Year: 631.11 local days (so 631 days and a leap year every 9th year), 677.13 Earth days. (About 10 days shorter than a Martian year.)
-* Rotation: 25h 44m 17s (solar, ie noon to noon)
+* Rotation: 25h 44m 17s (solar, ie noon to noon), or 25.738 hours
 * Calendar: week = 5 26-hour days plus 2 25-hour days, with every 4th weekend having an extra hour.
 ** 12 months, 5 of 52 days, 7 of 53 days, similar alternating pattern as Earth western calendar months.

@@ Line 1: / Line 1: @@
 == Sawyers World ==
-Habitable planet orbiting Alpha Centauri A,  (Alpha Centauri A II)
+The original name was "Sawyer's World", with an apostrophe.  This was later dropped.  The dropped-apostrophe is common in many place names.
-First extra-solar planet settled by humans (but not first landed upon, see [[Kakuloa]]).
+A habitable (terraformed) planet orbiting Alpha Centauri A,  (Alpha Centauri A II)
 * Largest city: Sawyer City
 Time
 * Year: 631.11 local days (so 631 days and a leap year every 9th year), 677.13 Earth days. (About 10 days shorter than a Martian year.)
@@ Line 14: / Line 18: @@
 ** Alternate two: 21 months, 20 of 30 days, 1 (last of the year) of 31 days.
 ** Earth calendar and time (UTC  -- which is now becoming truly universal) is also maintained for reference (file timestamps, etc.)
 Size
 * Radius: slightly larger than Earth, about 1.05 E, 8400 miles diameter (8320 miles)

@@ Line 13: / Line 13: @@
 ** Alternate one: 21 months, 10 of 29 days, 11 of 31 days, alternating.
 ** Alternate two: 21 months, 20 of 30 days, 1 (last of the year) of 31 days.
 Size
 * Radius: slightly larger than Earth, about 1.05 E, 8400 miles diameter (8320 miles)

@@ Line 26: / Line 26: @@
 (But escape velocity slightly higher, due to 1/r-squared: 11.42 km/sec vs  11.18 km/sec, and get a 0.41 km/sec boost from rotation at equator (vs  0.44 on Earth)
 ** Specifically, Ve = 11.49 km/sec, rotation boost = 0.45 km/sec at equator, 0.32 at 45 deg lat.
 ==Sources==

@@ Line 22: / Line 22: @@
 ==Sources==
-* The Chara Talisman ("we're here 26 hours a day")
+* ''The Chara Talisman'' ("we're here 26 hours a day")
-* Alpha Centauri, First Landing (discussion of planetary parameters on initial survey)
+* ''Alpha Centauri: First Landing'' (discussion of planetary parameters on initial survey)