HR6490

HR6490 is a hypergiant star in the constellation of Ophiuchus.

HR6490 visual magnitude is 6.44. Because of its reltive faintness, HR6490 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 HR6490:

Color of HR6490 ⬤

Magnitude of HR6490 6.44

Class Hypergiant

VISIBILITY RIGHT NOW HR6490 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR6490

HR6490 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6490 are provided in the following table:

Right Ascension J2000 17h 26m 55s

Declination J2000 -25° 56’ 35”

Galactic Longitude 0.3°

Galactic Latitude 5.11°

Constellation Ophiuchus

The simplified sky map below shows the position of HR6490 in the sky:

Simplified finder chart for HR6490.

Visibility of HR6490 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR6490 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 115.9° RISE 2:21

Max altitude: 12.6° TRANSIT 5:49

Azimuth: 244.1° SET 9:17

RIGHT NOW HR6490 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6490

The image below is a photograph of HR6490 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 HR6490 is -0.028 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR6490. The red arrow shows the motion of HR6490 during the next 10000 years (-4.67 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of HR6490 from the Sun and relative movement

HR6490 is distant 422.83 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

Distance (parsec) 129.70 pc

Distance (light year) 422.83 ly

Heliocentric radial velocity -8 km/s

Proper Motion RA -0.028 arcsec/year

Proper Motion Dec -0.026 arcsec/year

Spectral properties of HR6490

HR6490 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 0.88

Spectral Type A0V

Color Index (B-V) -0.06

Temperature of HR6490 10941K

The red dot in the diagram below shows where HR6490 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6490. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6490

Henry Draper Catalogue HD157864

SAO Catalogue SAO185406

Hipparcos Catalogue HIP85391

Durchmusterung Catalogue CD-2512160

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In Evidence

Other stars in Ophiuchus