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public LocationGreenwich, United Kingdom
TimezoneEurope/London
Sunrise: 4:53 
Transit: 12:55 
Sunset: 20:59
wb_twilight   (Civil Twilight)   What's Visible Now?

HR1540

Altitude: -55.8°   Azimuth: 225.4°   Direction: South-West

HR1540 is a variable hypergiant star in the constellation of Dorado.

HR1540 visual magnitude is 6.46. Because of its reltive faintness, HR1540 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR1540 is -0.013 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1540 star
DSS2 image of HR1540. The red arrow shows the motion of HR1540 during the next 10000 years (-2.17 arcmin in Right Ascension and -0.83 arcmin in declination);

Key facts about HR1540

6.46
Hypergiant

HR1540 is below the horizon from Greenwich, United Kingdom.

Altitude: -55.8°
Azimuth: 225.4°
Direction: South-West

Celestial coordinates and finder chart of HR1540

HR1540 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 HR1540 are provided in the following table:

04h 44m 57s
-63° 13’ 46”
273.75°
-38.12°
Dorado

The simplified sky map below shows the position of HR1540 in the sky:

Finder chart HR1540 star
Simplified finder chart for HR1540.

Visibility of HR1540 from your location

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

HR1540 is currently not visible from Greenwich, United Kingdom

Distance of HR1540 from the Sun and relative movement

HR1540 is distant 455.94 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

139.86 pc
455.94 ly
16 km/s
-0.013 arcsec/year
-0.005 arcsec/year

Spectral properties of HR1540

HR1540 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

0.73
K0III
4559K

The red dot in the diagram below shows where HR1540 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR1540. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1540

SAO249095
SAO249095