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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: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Carina » 


Altitude: -47.3°   Azimuth: 203.8°   Direction: South-South-West

HR4102 is a variable sub-giant star in the constellation of Carina.

HR4102 visual magnitude is 4. Because of its moderate brightness, HR4102 should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of HR4102 is -0.021 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4102 star
DSS2 image of HR4102. The red arrow shows the motion of HR4102 during the next 10000 years (-3.50 arcmin in Right Ascension and -4.33 arcmin in declination);

Key facts about HR4102


HR4102 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -47.3°
Azimuth: 203.8°
Direction: South-South-West

Celestial coordinates and finder chart of HR4102

HR4102 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4102 are provided in the following table:

10h 24m 23s
-74° 01’ 54”

The simplified sky map below shows the position of HR4102 in the sky:

Finder chart HR4102 star
Simplified finder chart for HR4102.

Visibility of HR4102 from your location

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

HR4102 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR4102 from the Sun and relative movement

HR4102 is distant 52.86 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

16.22 pc
52.86 ly
-4 km/s
-0.021 arcsec/year
-0.026 arcsec/year

Spectral properties of HR4102

HR4102 belongs to spectral class F2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR4102 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4102. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4102