Sirius

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Sirius is a binary star system that consists of a blue-white A-type main-sequence star, named Sirius A, and a faint white dwarf companion called Sirius B or "the Pup." The city-station Romulus, which orbits Sirius A, is an important trading hub and shipbuilding bastion of interstellar civilization. Alongside Procyon, Sirius is one of the founding members of the prominent Dogstar Alliance.

Astrography

Location

Sirius lies approximately 5.2 lightyears from Procyon, and about 8 lightyears from Sol. It is a well-connected system, having jump links to twelve other systems: Procyon, Ross 614, Luyten, Kapteyn, Ran, Sol, Hal'sen, Chaos, Wolf 359, DX Cancri, Luhman 16, and Alpha Centauri.

Structure

The Sirius binary system, unlike Procyon, is almost entirely devoid of planets and mostly devoid of asteroids and comets. The cosmically-recent death of Sirius B resulted in the extreme alteration of the system's orbital structure, and it is presumed that any planets previously present in the system were violently ejected due to gravitational interactions. The existence of Laika, a small, airless telluric world on a highly eccentric circumbinary orbit, strongly supports this theory. The rogue planets Murray-Callahan and Lucina have interstellar vectors that suggest they too may have once orbited Sirius A or B.
SYSTEM OUTLINE

Sirius AB

• Laika* (s)

Population

The Sirius system is administrated by the Ecumenical Democracy of Sirius (EDS), headquartered in the citystation Romulus where the majority of its 102.5 million people live. The interstellar influence held by the EDS is rooted in its industry, particularly the antimatter production facilities in orbit of Sirius proper and the heavy element collection operations in orbit of the Pup. The EDS is one of the most prominent members of the Dogstar Alliance, alongside its twin sister polity the Ecumenical Democracy of Procyon.

Archive Data

DESIGNATIONS

Bayer designation

Alpha Canis Majoris

UNAC Local Star Catalogue designation

USC 009

Other designations

• GJ 244
• HIP 32349
• ^Yapaadu/_Hsielskae
• OH^SE 22
• Vaqari Mae
• AM 14
• 2 Jrrv
• EZN 101
• Omh Hauval ikh'Bakhur
• KAZ 79

SYSTEM CHARACTERISTICS

Location

Local Interstellar Cloud, Local Bubble, Orion–Cygnus Arm, Milky Way, Virgo Supercluster

Sol-relative coordinates

RA 06h 45m 08.9s
DEC -16° 42' 58"
DIST 8.66 ly

Proximal system

Procyon (5.2 ly)

System diameter (farthest orbit)

3.4e+10 km (Laika)

System diameter (heliopause)

5.0e+9 km

System mass

3.08 M_Sol

Semi-major axis

20 AU

Eccentricity

0.59

Period

50.13 years

Circumbinary stability limit

122 AU

Major planets

1

Inhabited planetoids

17

STELLAR CHARACTERISTICS

Component stars

1. Sirius A
2. Sirius B

Stellar type

1. A0Va
2. DA2

Mass

1. 2.063 M_Sol
2. 1.018 M_Sol

Temperature

1. 9940 K
2. 25000 K

Luminosity

1. 25.4 L_Sol
2. 0.056 L_Sol

Age

1. 242 Myr
2. 228 Myr

HABITATION INFORMATION

Total population

102.5 million

Species demographics

• 93% human
• 3% skae
• 3% shyxaure
• 1% Other

Demonym

Sirian

Administrated by

Ecumenical Democracy of Sirius

Member of

Dogstar Alliance

ERPA Restriction Level

I

Reality Check

The real Sirius system has no confirmed planets or planet candidates, and due to its highly eccentric binary orbit it is unlikely to have any planets at all (discovered or undiscovered). The fictional planet Laika was placed in this system to honor the sacrifice of one of Earth's earliest astronauts.