HR4251

Altitude: -56.8° Azimuth: 335.7° Direction: North-North-West

HR4251 is a variable and multiple main-sequence star in the constellation of Hydra.

HR4251 visual magnitude is 5.24. Because of its reltive faintness, HR4251 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR4251:

Color of HR4251 ⬤

Magnitude of HR4251 5.24

Class Main-sequence

VISIBILITY RIGHT NOW

HR4251 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -56.8°
Azimuth: 335.7°
Direction: North-North-West

Celestial coordinates and finder chart of HR4251

HR4251 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4251 are provided in the following table:

Right Ascension J2000 10h 53m 29s

Declination J2000 -20° 08’ 20”

Galactic Longitude 268.69°

Galactic Latitude 34.78°

Constellation Hydra

The simplified sky map below shows the position of HR4251 in the sky:

Simplified finder chart for HR4251.

Visibility of HR4251 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 HR4251 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: 110.1° RISE 14:41

Max altitude: 18.4° TRANSIT 18:50

Azimuth: 249.9° SET 22:58

RIGHT NOW HR4251 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4251

The image below is a photograph of HR4251 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR4251 is 0.078 arcsec per year in Right Ascension and -0.239 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4251. The red arrow shows the motion of HR4251 during the next 1000 years (1.30 arcmin in Right Ascension and -3.98 arcmin in declination);

Distance of HR4251 from the Sun and relative movement

HR4251 is distant 102.16 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

Distance (parsec) 31.34 pc

Distance (light year) 102.16 ly

Heliocentric radial velocity -5 km/s

Proper Motion RA 0.078 arcsec/year

Proper Motion Dec -0.239 arcsec/year

Spectral properties of HR4251

HR4251 belongs to spectral class F6 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 2.76

Spectral Type F6V

Color Index (B-V) 0.47

Temperature of HR4251 6528K

The red dot in the diagram below shows where HR4251 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4251. Attribution: Richard Powell / CC BY-SA

HR4251 star system properties

HR4251 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR4251 double sysyem:

Main star magnitude 5.24

Secondary star magnitude 9.24

Magnitude difference 4

Separation 124.5 arcsec

Alternative designations of HR4251

Henry Draper Catalogue HD94388

SAO Catalogue SAO156301

Hipparcos Catalogue HIP53252

Durchmusterung Catalogue BD-19 3125

Gliese Catalogue Gl 403.1

General Catalogue of Variable Stars 5006

In Evidence

Other stars in Hydra