HR1800

Below the horizon. Rise: 0:48 | Tran: 6:48 | Set: 12:43

Alt: -39.04° Az: 358.95° Direction: North

HR1800 is a double star of spectral class B9 in the constellation of Orion.

HR1800 visual magnitude is 6.57. Because of its faintness, HR1800 is not visible to the naked eye.

DSS2 image of HR1800. The red arrow shows the motion of HR1800 during the next 10000 years (2.00 arcmin in Right Ascension and -1.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 05h 26m 46s

Declination -00° 31’ 26”

Hour Angle 11h 56m 44s

Sideral Time 17h 23m 31s

J2000

Right Ascension 05h 25m 31s

Declination -00° 32’ 39”

Galactic Coordinates

Galactic Longitude 203.26°

Galactic Latitude -19.28°

Finder Chart

Simplified finder chart for HR1800.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.57

Class

HR1800 is also a HgSi chemically peculiar star.

Absolute magnitude -0.20

Spectral Type B9

Color Index (B-V) -0.05

Temperature 10795K

The red dot in the diagram below shows where HR1800 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR1800. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR1800 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR1800 double sysyem:

Main star magnitude 6.57

Secondary star magnitude 7.17

Magnitude difference 0.6

Separation 0.2 arcsec

Distance, Radial Speed, Proper Motion

HR1800 is distant 737.56 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

Distance (parsec) 226.24

Distance (light year) 737.56

Radial Speed -9 km/s

Proper Motion RA 0.012 arcsec/y

Proper Motion Dec -0.007"/y

Alternative Designations

Henry Draper Catalogue HD35548

SAO Catalogue SAO132086

Hipparcos Catalogue HIP25365

Durchmusterung Catalogue BD-00 945

Aitken Double Star Catalogue ADS4020

Visibility from Your Location

Today's HR1800 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 90.5° RISE 0:48

Max altitude: 38.0° TRANSIT 6:48

Azimuth: 269.5° SET 12:43

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Orion