HR4157

Below the horizon. Rise: 8:16 | Tran: 11:37 | Set: 14:59

Alt: -4.89° Az: 231.74° Direction: South-West

HR4157 is a variable and double main-sequence star of spectral class F5 in the constellation of Hydra.

HR4157 visual magnitude is 6.29. Because of its faintness, HR4157 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 HR4157. The red arrow shows the motion of HR4157 during the next 10000 years (1.50 arcmin in Right Ascension and -10.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 10h 37m 14s

Declination -26° 48’ 13”

Hour Angle 04h 04m 53s

Sideral Time 14h 42m 08s

J2000

Right Ascension 10h 36m 04s

Declination -26° 40’ 30”

Galactic Coordinates

Galactic Longitude 268.94°

Galactic Latitude 27.12°

Finder Chart

Simplified finder chart for HR4157.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.29

Class Main-sequence

Absolute magnitude 3.07

Spectral Type F5V

Color Index (B-V) 0.48

Temperature 6481K

The red dot in the diagram below shows where HR4157 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4157. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR4157 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR4157 double sysyem:

Main star magnitude 6.29

Secondary star magnitude 7.29

Magnitude difference 1

Separation 1 arcsec

Distance, Radial Speed, Proper Motion

HR4157 is distant 143.49 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

Distance (parsec) 44.01

Distance (light year) 143.49

Radial Speed -23 km/s

Proper Motion RA 0.009 arcsec/y

Proper Motion Dec -0.062"/y

Alternative Designations

Henry Draper Catalogue HD91881

SAO Catalogue SAO179014

Hipparcos Catalogue HIP51885

Durchmusterung Catalogue CD-26 8022

General Catalogue of Variable Stars 4907

Aitken Double Star Catalogue ADS7846

Visibility from Your Location

Today's HR4157 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 116.8° RISE 8:16

Max altitude: 11.7° TRANSIT 11:37

Azimuth: 243.2° SET 14:59

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Hydra