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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 5:43  
clear_day Transit: 12:56  
SunsetSet: 20:10
sunny DaytimeWhat's Visible Now?
All Constellations » Auriga » 

HR2105

Altitude: 61.8°   Azimuth: 77.3°   Direction: East-North-East

HR2105 is a hypergiant star in the constellation of Auriga.

HR2105 visual magnitude is 5.96. Because of its reltive faintness, HR2105 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR2105 is 0.005 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2105 star
DSS2 image of HR2105. The red arrow shows the motion of HR2105 during the next 10000 years (0.83 arcmin in Right Ascension and -2.50 arcmin in declination);

Key facts about HR2105

5.96
Hypergiant

HR2105 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 61.8°
Azimuth: 77.3°
Direction: East-North-East

Celestial coordinates and finder chart of HR2105

HR2105 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR2105 are provided in the following table:

06h 01m 43s
+48° 57’ 33”
164.01°
12.6°
Auriga

The simplified sky map below shows the position of HR2105 in the sky:

Finder chart HR2105 star
Simplified finder chart for HR2105.

Visibility of HR2105 from your location

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

HR2105 is circumpolar and transits at 15:45 UTC (altitude: 87.5°)

Distance of HR2105 from the Sun and relative movement

HR2105 is distant 686.32 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

210.53 pc
686.32 ly
11 km/s
0.005 arcsec/year
-0.015 arcsec/year

Spectral properties of HR2105

HR2105 belongs to spectral class K0

-0.66
K0
3870K

The red dot in the diagram below shows where HR2105 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2105. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2105

SAO40789
SAO40789