Asterope - 21 Tauri

Altitude: 59.3° Azimuth: 216.0° Direction: South-West

Asterope, also designated as 21 Tauri , is a variable main-sequence star in the constellation of Taurus.

Asterope visual magnitude is 5.76. Because of its reltive faintness, Asterope 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 Asterope:

Color of Asterope ⬤

Magnitude of Asterope 5.76

Class Main-sequence

VISIBILITY RIGHT NOW

Asterope - 21 Tauri is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 59.3°
Azimuth: 216.0°
Direction: South-West

Celestial coordinates and finder chart of Asterope

Asterope 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 Asterope are provided in the following table:

Right Ascension J2000 03h 45m 54s

Declination J2000 +24° 33’ 16”

Galactic Longitude 166.05°

Galactic Latitude -23.36°

Constellation Taurus

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

Simplified finder chart for Asterope - 21 Tauri.

Visibility of Asterope 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 Asterope - 21 Tauri 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: 65.4° RISE 3:22

Max altitude: 63.1° TRANSIT 11:39

Azimuth: 294.6° SET 19:57

RIGHT NOW Asterope - 21 Tauri is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Asterope

The image below is a photograph of Asterope 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 Asterope is 0.011 arcsec per year in Right Ascension and -0.042 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of Asterope. The red arrow shows the motion of Asterope during the next 10000 years (1.83 arcmin in Right Ascension and -7.00 arcmin in declination);

Distance of Asterope from the Sun and relative movement

Asterope is distant 386.71 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

Distance (parsec) 118.62 pc

Distance (light year) 386.71 ly

Heliocentric radial velocity 9 km/s

Proper Motion RA 0.011 arcsec/year

Proper Motion Dec -0.042 arcsec/year

Spectral properties of Asterope

Asterope belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 0.39

Spectral Type B8V

Color Index (B-V) -0.04

Temperature of Asterope 10653K

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

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

Alternative designations of Asterope

Proper Name Asterope

Flamsteed designation 21 Tauri

Henry Draper Catalogue HD23432

SAO Catalogue SAO76159

Hipparcos Catalogue HIP17579

Durchmusterung Catalogue BD+24 553

General Catalogue of Variable Stars 1283

In Evidence

Other stars in Taurus