Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:34  ☀️ Transit: 13:02  🌅 Sunset: 19:31

1 Monocerotis

1 Monocerotis is a variable sub-giant star in the constellation of Monoceros.

1 Monocerotis visual magnitude is 6.12. Because of its reltive faintness, 1 Monocerotis 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 1 Monocerotis:

1 Monocerotis is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 1 Monocerotis

1 Monocerotis 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 1 Monocerotis are provided in the following table:

05h 59m 00s
-09° 22’ 55”

The simplified sky map below shows the position of 1 Monocerotis in the sky:

Finder chart 1 Monocerotis star
Simplified finder chart for 1 Monocerotis.

Visibility of 1 Monocerotis from your location

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

Today's 1 Monocerotis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 99.4°
Max altitude: 29.1°
Azimuth: 260.6°
1 Monocerotis is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 1 Monocerotis

The image below is a photograph of 1 Monocerotis 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 1 Monocerotis is 0.014 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 1 Monocerotis star
DSS2 image of 1 Monocerotis. The red arrow shows the motion of 1 Monocerotis during the next 10000 years (2.33 arcmin in Right Ascension and 2.00 arcmin in declination);

Distance of 1 Monocerotis from the Sun and relative movement

1 Monocerotis is distant 315.89 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

96.90 pc
315.89 ly
12 km/s
0.014 arcsec/year
0.012 arcsec/year

Spectral properties of 1 Monocerotis

1 Monocerotis belongs to spectral class F2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 1 Monocerotis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 1 Monocerotis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 1 Monocerotis

1 Monocerotis