Cyrarian Star System Description

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Star System Description

Type: Binary

Location from Earth: Constellation Scorpio, Xi A & B

Distance: 80 lightyears

Class:  F5-IV subgiants

 

Average Separation: 18 AU (2.6928 x 1012 meters) (Similar to distance between Uranus and Sun)

3rd Component:  dG7 Orange dwarf, magnitude 7.2, slow retrograde orbit with period of 1000 years around both Xi A & B.

 

ZETA (Xi A)

Absolute Magnitude: 2.9 (~5x Sun)

Surface Temperature : 6800K

Mass : 2.88x1030 kg

Luminosity : 1.95x1034 erg sec-1

Radius : 1.131x106 km

 

ZINNI (Xi B)

Absolute Magnitude 3.1

Surface Temperature : 6500K

Mass : 2.66x1030 kg

Luminosity : 1.87x1034 erg sec-1

Radius : 1.213x106 km

 

BINARY SYSTEM DYNAMICS

In any binary system the two components orbit each other. Essentially, Zinni completes an orbit around Zeta approximately every 45.69 years.  This adds to the instability of Cyraria and explains why the planet's orbit can change from an ellipse around one or both to an lemniscate which passes between the two in a figure "8" pattern.  Orbital changes result in violent planetary upheavals.  The seasons shown at right are based on a stable system which can be disrupted as a result of the orbital dynamics of the two stars.

 

HABITABLE PLANET: Cyraria

 

Surface Temperature Range: -53oC/-64oF to 101oC/214oF

Radius : 6.5x106 m

Mass : 6.8x1024 kg

Rotational Period: 26 hours

Axial Inclination from Vertical:  87o

Gravitational Acceleration: 10.735 meters sec-2

 

Distance to Zeta:

2.692x108 km aphelion

1.904x108 km perihelion

Semi-major axis: 2.02x108 km

Eccentricity: .333

Period: 6880 days

Angular Size from Cyraria :

.48o Perihelion

.12o Aphelion

 

Distance to Zinni:

2.65x108 aphelion

1.89x108 perihelion

Semi-major axis (Zinni): 1.98x108 km

Eccentricity: .326

Period: 7120 days

Angular Size from Cyraria:

.51o Perihelion

.13o Aphelion

 

Orbital Characteristics

Double ellipse (lemniscate)

Entire Circuit: ~14,000 days

 

Seasons and Weather

Total Seasons: 16

Temperature Range:  -51C/-60F to 101C/214F

Contiguous Length of Opposition:  778 days (Seasons 12 & 13)

Contiguous Length of Winter: 3058 days

Galactic Standard Year:  400 days

 

Satellite: NIFEIR

Orbital Period:  36 days

Radius: 2144.7 km

Avg distance from Cyraria: 1.46x105 km

Composition:  Nickel (Ni), Iron (Fe), Iridium (Ir)

NOTE:  Xi A & B are actual stars in the constellation Scorpius.  The information provided was obtained from Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System by Robert Burnham, Jr., Volume 3. New York, Dover Publications, Inc. 1978.  p. 1645, 1684-1686.

Cyraria is a hypothetical planet developed by the author. 

Beyond the Hidden Sky

A Dark of Endless Days A Psilent Place Below Refractions of Frozen Time Cyraria Terms and Definitions For Parents and Educators Other Titles

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