28 Hydrae

28 Hydrae is a giant star in the constellation of Hydra.

28 Hydrae visual magnitude is 5.59. Because of its reltive faintness, 28 Hydrae 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 28 Hydrae:

Color of 28 Hydrae ⬤

Magnitude of 28 Hydrae 5.59

Class Giant

VISIBILITY RIGHT NOW 28 Hydrae is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 28 Hydrae

28 Hydrae 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 28 Hydrae are provided in the following table:

Right Ascension J2000 09h 25m 23s

Declination J2000 -05° 07’ 02”

Galactic Longitude 237.84°

Galactic Latitude 30.73°

Constellation Hydra

The simplified sky map below shows the position of 28 Hydrae in the sky:

Simplified finder chart for 28 Hydrae.

Visibility of 28 Hydrae 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 28 Hydrae 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: 95.1° RISE 12:29

Max altitude: 33.4° TRANSIT 18:01

Azimuth: 264.9° SET 23:33

RIGHT NOW 28 Hydrae is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 28 Hydrae

The image below is a photograph of 28 Hydrae 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 28 Hydrae is -0.012 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 28 Hydrae. The red arrow shows the motion of 28 Hydrae during the next 10000 years (-2.00 arcmin in Right Ascension and -1.33 arcmin in declination);

Distance of 28 Hydrae from the Sun and relative movement

28 Hydrae is distant 674.95 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

Distance (parsec) 207.04 pc

Distance (light year) 674.95 ly

Heliocentric radial velocity 5 km/s

Proper Motion RA -0.012 arcsec/year

Proper Motion Dec -0.008 arcsec/year

Spectral properties of 28 Hydrae

28 Hydrae belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.99

Spectral Type K5III

Color Index (B-V) 1.52

Temperature of 28 Hydrae 3764K

The red dot in the diagram below shows where 28 Hydrae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 28 Hydrae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 28 Hydrae

Flamsteed designation 28 Hydrae

Henry Draper Catalogue HD81420

SAO Catalogue SAO136832

Hipparcos Catalogue HIP46221

Durchmusterung Catalogue BD-04 2616

FK5 Catalogue 1245

In Evidence

Other stars in Hydra