HR3991

Below the horizon. Rise: 4:50 | Tran: 9:41 | Set: 14:32

Alt: -38.87° Az: 303.42° Direction: West-North-West

HR3991 is a main-sequence star of spectral class F5 in the constellation of Hydra.

HR3991 visual magnitude is 5.31. Because of its faintness, HR3991 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of HR3991. The red arrow shows the motion of HR3991 during the next 1000 years (-2.08 arcmin in Right Ascension and -1.88 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 10h 11m 18s

Declination -12° 56’ 19”

Hour Angle 09h 12m 42s

Sidereal Time 19h 24m 01s

J2000

Right Ascension 10h 10m 05s

Declination -12° 48’ 57”

Galactic Coordinates

Galactic Longitude 253.29°

Galactic Latitude 34.08°

Finder Chart

Simplified finder chart for HR3991.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.31

Class Main-sequence

Absolute magnitude 3.13

Spectral Type F5V

Color Index (B-V) 0.36

Temperature 7101K

The red dot in the diagram below shows where HR3991 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR3991. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR3991 is distant 89.05 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

Distance (parsec) 27.31

Distance (light year) 89.05

Radial Speed 23 km/s

Proper Motion RA -0.125 arcsec/y

Proper Motion Dec -0.113"/y

Alternative Designations

Henry Draper Catalogue HD88215

SAO Catalogue SAO155780

Hipparcos Catalogue HIP49809

Durchmusterung Catalogue BD-12 3101

Visibility from Your Location

Today's HR3991 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 102.9° RISE 4:50

Max altitude: 25.6° TRANSIT 9:41

Azimuth: 257.1° SET 14:32

Set Location

Other stars in Hydra