HR4881

Altitude: -1.8° Azimuth: 226.9° Direction: South-West

HR4881 is a hypergiant star in the constellation of Hydra.

HR4881 visual magnitude is 6.15. Because of its reltive faintness, HR4881 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 HR4881:

Color of HR4881 ⬤

Magnitude of HR4881 6.15

Class Hypergiant

VISIBILITY RIGHT NOW

HR4881 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -1.8°
Azimuth: 226.9°
Direction: South-West

Celestial coordinates and finder chart of HR4881

HR4881 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 HR4881 are provided in the following table:

Right Ascension J2000 12h 51m 57s

Declination J2000 -26° 44’ 17”

Galactic Longitude 303.08°

Galactic Latitude 36.13°

Constellation Hydra

The simplified sky map below shows the position of HR4881 in the sky:

Simplified finder chart for HR4881.

Visibility of HR4881 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 HR4881 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: 116.7° RISE 4:15

Max altitude: 11.8° TRANSIT 7:36

Azimuth: 243.3° SET 10:58

Digitized Sky Survey image of HR4881

The image below is a photograph of HR4881 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 HR4881 is -0.111 arcsec per year in Right Ascension and 0.04 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4881. The red arrow shows the motion of HR4881 during the next 1000 years (-1.85 arcmin in Right Ascension and 0.67 arcmin in declination);

Distance of HR4881 from the Sun and relative movement

HR4881 is distant 196.15 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

Distance (parsec) 60.17 pc

Distance (light year) 196.15 ly

Heliocentric radial velocity -18 km/s

Proper Motion RA -0.111 arcsec/year

Proper Motion Dec 0.04 arcsec/year

Spectral properties of HR4881

HR4881 belongs to spectral class A0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 2.25

Spectral Type A0III

Color Index (B-V) 0.23

Temperature of HR4881 7938K

The red dot in the diagram below shows where HR4881 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4881. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4881

Henry Draper Catalogue HD111786

SAO Catalogue SAO181169

Hipparcos Catalogue HIP62788

Durchmusterung Catalogue CD-26 9369

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In Evidence

Other stars in Hydra