Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

HR4901

HR4901 is a variable and double main-sequence star in the constellation of Virgo.

HR4901 visual magnitude is 6. Because of its reltive faintness, HR4901 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 HR4901:

6
Main-sequence
HR4901 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 7°.

Celestial coordinates and finder chart of HR4901

HR4901 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 HR4901 are provided in the following table:

12h 54m 18s
-11° 38’ 54”
304.06°
51.22°
Virgo

The simplified sky map below shows the position of HR4901 in the sky:

Finder chart HR4901 star
Simplified finder chart for HR4901.

Visibility of HR4901 from your location

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

Today's HR4901 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 101.6°
Max altitude: 26.9°
Azimuth: 258.4°
HR4901 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4901

The image below is a photograph of HR4901 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 HR4901 is -0.141 arcsec per year in Right Ascension and 0.013 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4901 star
DSS2 image of HR4901. The red arrow shows the motion of HR4901 during the next 1000 years (-2.35 arcmin in Right Ascension and 0.22 arcmin in declination);

Distance of HR4901 from the Sun and relative movement

HR4901 is distant 217.62 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

66.76 pc
217.62 ly
-24 km/s
-0.141 arcsec/year
0.013 arcsec/year

Spectral properties of HR4901

HR4901 belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

1.88
A2V
9226K

The red dot in the diagram below shows where HR4901 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4901. Attribution: Richard Powell / CC BY-SA

HR4901 star system properties

HR4901 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 HR4901 double sysyem:

6
6.1
0.1
0.1 arcsec

Alternative designations of HR4901

SAO157584
SAO157584