Alya - θ1 Serpentis (theta1 Serpentis)
Alya, also designated as θ1 Serpentis (theta1 Serpentis), is a variable and multiple main-sequence star in the constellation of Serpens.
Alya visual magnitude is 4.62. Because of its moderate brightness, Alya should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.
The table below summarizes the key facts about Alya:
Celestial coordinates and finder chart of Alya
Alya is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Alya are provided in the following table:
The simplified sky map below shows the position of Alya in the sky:
Visibility of Alya from your location
Today's Alya - θ1 Serpentis (theta1 Serpentis) rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):
Digitized Sky Survey image of Alya
The image below is a photograph of Alya from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of Alya is 0.049 arcsec per year in Right Ascension and 0.031 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of Alya from the Sun and relative movement
Alya is distant 131.82 light years from the Sun and it is moving towards the Sun at the speed of 46 kilometers per second.
Spectral properties of Alya
Alya belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.
The red dot in the diagram below shows where Alya is situated in the Hertzsprung–Russell diagram.
Alya star system properties
Alya is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the Alya double sysyem: