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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
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All Constellations » Vela » 

HR3978

Altitude: -85.9°   Azimuth: 102.4°   Direction: East-South-East

HR3978 is a variable giant star in the constellation of Vela.

HR3978 visual magnitude is 6.52. Because of its reltive faintness, HR3978 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 HR3978 is -0.068 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 HR3978 star
DSS2 image of HR3978. The red arrow shows the motion of HR3978 during the next 10000 years (-11.33 arcmin in Right Ascension and 2.50 arcmin in declination);

Key facts about HR3978

6.52
Giant

HR3978 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -85.9°
Azimuth: 102.4°
Direction: East-South-East

Celestial coordinates and finder chart of HR3978

HR3978 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 HR3978 are provided in the following table:

10h 06m 07s
-52° 11’ 17”
279.02°
2.84°
Vela

The simplified sky map below shows the position of HR3978 in the sky:

Finder chart HR3978 star
Simplified finder chart for HR3978.

Visibility of HR3978 from your location

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

HR3978 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR3978 from the Sun and relative movement

HR3978 is distant 393.72 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

120.77 pc
393.72 ly
5 km/s
-0.068 arcsec/year
0.015 arcsec/year

Spectral properties of HR3978

HR3978 belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.

1.11
K1III
4791K

The red dot in the diagram below shows where HR3978 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3978. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3978

SAO237690
SAO237690