HR1898

HR1898 is a double sub-giant star in the constellation of Orion.

HR1898 visual magnitude is 6.38. Because of its reltive faintness, HR1898 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 HR1898:

Color of HR1898 ⬤

Magnitude of HR1898 6.38

Class Sub-giant

VISIBILITY RIGHT NOW HR1898 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR1898

HR1898 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 HR1898 are provided in the following table:

Right Ascension J2000 05h 35m 31s

Declination J2000 -04° 21’ 52”

Galactic Longitude 208.07°

Galactic Latitude -18.86°

Constellation Orion

The simplified sky map below shows the position of HR1898 in the sky:

Simplified finder chart for HR1898.

Visibility of HR1898 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 HR1898 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: 94.4° RISE 8:36

Max altitude: 34.2° TRANSIT 14:12

Azimuth: 265.6° SET 19:48

RIGHT NOW HR1898 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR1898

The image below is a photograph of HR1898 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 HR1898 is 0.002 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR1898. The red arrow shows the motion of HR1898 during the next 10000 years (0.33 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of HR1898 from the Sun and relative movement

HR1898 is distant 1,263.57 light years from the Sun and it is moving far from the Sun at the speed of 30 kilometers per second.

Distance (parsec) 387.60 pc

Distance (light year) 1,263.57 ly

Heliocentric radial velocity 30 km/s

Proper Motion RA 0.002 arcsec/year

Proper Motion Dec -0.021 arcsec/year

Spectral properties of HR1898

HR1898 belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -1.56

Spectral Type B2IV

Color Index (B-V) -0.14

Temperature of HR1898 12293K

The red dot in the diagram below shows where HR1898 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR1898. Attribution: Richard Powell / CC BY-SA

HR1898 star system properties

HR1898 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 HR1898 double sysyem:

Main star magnitude 6.38

Secondary star magnitude 8.38

Magnitude difference 2

Separation 4.2 arcsec

Alternative designations of HR1898

Henry Draper Catalogue HD37040

SAO Catalogue SAO132325

Hipparcos Catalogue HIP26257

Durchmusterung Catalogue BD-04 1186

Aitken Double Star Catalogue ADS4192

In Evidence

Other stars in Orion