Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:43  
clear_day Transit: 12:58  
SunsetSet: 21:12 south
sunny DaytimeWhat's Visible Now
All Constellations » Hydra » 


Altitude: 13.2°   Azimuth: 162.8°   Direction: South-South-East

HR3858 is a double main-sequence star in the constellation of Hydra.

HR3858 visual magnitude is 4.77. Because of its moderate brightness, HR3858 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR3858:


HR3858 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.2°
Azimuth: 162.8°
Direction: South-South-East

Celestial coordinates and finder chart of HR3858

HR3858 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 HR3858 are provided in the following table:

09h 41m 17s
-23° 35’ 30”

The simplified sky map below shows the position of HR3858 in the sky:

Finder chart HR3858 star
Simplified finder chart for HR3858.

Visibility of HR3858 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 HR3858 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: 113.6°
Max altitude: 14.9°
Azimuth: 246.4°
HR3858 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR3858

The image below is a photograph of HR3858 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 HR3858 is -0.028 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3858 star
DSS2 image of HR3858. The red arrow shows the motion of HR3858 during the next 10000 years (-4.67 arcmin in Right Ascension and -0.67 arcmin in declination);

Distance of HR3858 from the Sun and relative movement

HR3858 is distant 496.95 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

152.44 pc
496.95 ly
26 km/s
-0.028 arcsec/year
-0.004 arcsec/year

Spectral properties of HR3858

HR3858 belongs to spectral class B6 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR3858 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3858. Attribution: Richard Powell / CC BY-SA

HR3858 star system properties

HR3858 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 HR3858 double sysyem:

54.7 arcsec

Alternative designations of HR3858