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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sunny DaytimeWhat's Visible Now?
All Constellations » Columba » 

HR1721

Altitude: -56.2°   Azimuth: 79.6°   Direction: East

HR1721 is a giant star in the constellation of Columba.

HR1721 visual magnitude is 5.76. Because of its reltive faintness, HR1721 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 HR1721 is 0.016 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1721 star
DSS2 image of HR1721. The red arrow shows the motion of HR1721 during the next 10000 years (2.67 arcmin in Right Ascension and 0.67 arcmin in declination);

Key facts about HR1721

5.76
Giant

HR1721 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -56.2°
Azimuth: 79.6°
Direction: East

Celestial coordinates and finder chart of HR1721

HR1721 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 HR1721 are provided in the following table:

05h 14m 28s
-35° 58’ 37”
239.65°
-34.3°
Columba

The simplified sky map below shows the position of HR1721 in the sky:

Finder chart HR1721 star
Simplified finder chart for HR1721.

Visibility of HR1721 from your location

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

Today's HR1721 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 126.0°
Max altitude: 2.5°
Azimuth: 234.0°

Distance of HR1721 from the Sun and relative movement

HR1721 is distant 484.40 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

148.59 pc
484.40 ly
13 km/s
0.016 arcsec/year
0.004 arcsec/year

Spectral properties of HR1721

HR1721 belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

-0.10
G8III
4719K

The red dot in the diagram below shows where HR1721 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR1721. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1721

SAO195683
SAO195683