Chihazh
| Mean distance from Galhaf | 105,255,160 km .70359 AU |
| Apparent magnitude[1] | -24.90 |
| Absolute magnitude | 7.48 |
| Spectral classification | K5V |
| Angular size[1] | 28.4' - 32.3' |
| Mean diameter | 925,061 km |
| Mass | 1.3706 × 1030 kg .6891 M☉ |
| Temperature (photosphere) | 4,530 K |
| Luminosity | .153 L☉ |
| Age | 5.7 billion years |
Chihazh is the star that Galhaf orbits around. It is the smaller member of a binary star system (or the 2nd largest of a trinary if the brown dwarf Havatrakh is classified as a star). The name is derived from the Classical Kasshian waKazhan, which in post-Classical times shifted to gender I as chiKazhan hence the initial chi- syllable in the modern Ivetsian form. Chihazh and its companion sun Chimíve orbit each other with an orbital period of 25,872 Earth years.
Physical characteristics
From the surface of Galhaf, Chihazh has an angular size very similar to that of Earth's sun from its surface, though somewhat less bright. The total amount of radiation that reaches Galhaf's surface is a bit less than that received by Earth from its sun. It is particularly weak in the ultraviolet range, which has certain biological consequences, namely, Galhafan humans are unable to produce vitamin D in their skin and must obtain it from dietary sources[2]. Related, there is no risk of skin cancer from ultraviolet radiation. As a result, skin tone has no relation to latitude on Galhaf.
As a K5 star, Chihazh has a reddish color in comparison to Earth's Sun. Chihazh is a Population I star, somewhat more metal-rich than our own Sun. It is somewhat older than our own Sun, but, being a smaller and cooler star, its total lifespan will be significantly longer, and thus, it will continue shining long after our Sun has died.
History of observations
As with our own Sun, observations of Chihazh date back to ancient times. Several differences exist between the history of Chihazhan astronomy and our own solar astronomy, however, due to the particular conditions of their world. Notably, both of their moons have a smaller angular size than Chihazh. As a result, total solar eclipses never occur.
Due to Galhaf's relatively eccentric orbit, Chihazh's apparent motion relative to the stars is more variable than our own Sun's.
Stellar neighborhood
The location of Chihazh relative to Earth's sun is unknown. It appears to be very far away from our Sun. It is unknown how humanity arrived at Chihazh.
