Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

HR8099

HR8099 is a sub-giant star in the constellation of Cepheus.

HR8099 visual magnitude is 5.87. Because of its reltive faintness, HR8099 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR8099:

5.87
Sub-giant
HR8099 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 46°.

Celestial coordinates and finder chart of HR8099

HR8099 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8099 are provided in the following table:

21h 06m 23s
+71° 25’ 54”
106.95°
15.95°
Cepheus

The simplified sky map below shows the position of HR8099 in the sky:

Finder chart HR8099 star
Simplified finder chart for HR8099.

Visibility of HR8099 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR8099 is circumpolar and transits at 23:31 UTC (altitude: 70.0°)

Digitized Sky Survey image of HR8099

The image below is a photograph of HR8099 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 HR8099 is -0.048 arcsec per year in Right Ascension and -0.116 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR8099 star
DSS2 image of HR8099. The red arrow shows the motion of HR8099 during the next 1000 years (-0.80 arcmin in Right Ascension and -1.93 arcmin in declination);

Distance of HR8099 from the Sun and relative movement

HR8099 is distant 160.12 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

49.12 pc
160.12 ly
2 km/s
-0.048 arcsec/year
-0.116 arcsec/year

Spectral properties of HR8099

HR8099 belongs to spectral class F3 and has a luminosity class of IV corresponding to a sub-giant star.

2.41
F3IV
6880K

The red dot in the diagram below shows where HR8099 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8099. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8099

SAO9957
SAO9957