Your guide to the Solar System and the night sky
Latest Perseverance Images received 15 hours 27 mins ago for Sol76
🌎  Greenwich, United Kingdom [change]

Southern Comet (C/1947 X1-A)

Southern Comet (C/1947 X1-A) is currently in the constellation of Aquarius. The current Right Ascension of Southern Comet (C/1947 X1-A) is 21h 50m 51s and the Declination is -04° 17’ 23” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]).

Summary of key facts about Southern Comet (C/1947 X1-A) [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

21h 50m 51s
-04° 17’ 23”

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Southern Comet (C/1947 X1-A) available on TheSkyLive:

Available Resources

Southern Comet (C/1947 X1-A) Position and Finder Charts

Below we provide Southern Comet (C/1947 X1-A) finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Southern Comet (C/1947 X1-A) in Aquarius on May, 08 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Southern Comet (C/1947 X1-A) in Aquarius on May, 08 2021
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Southern Comet (C/1947 X1-A) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/1947 X1-A (Southern Comet)
RA: 21h 50m 51s
Dec: -04° 17’ 23”
Deep sky finder chart for Southern Comet (C/1947 X1-A)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Southern Comet (C/1947 X1-A)?, a page that provides all the information needed to find Southern Comet (C/1947 X1-A) in the sky and additional links to sky charts.

Southern Comet (C/1947 X1-A) Distance from Earth

The distance of Southern Comet (C/1947 X1-A) from Earth is currently 14,390,651,749 kilometers, equivalent to 96.195565 Astronomical Units. Light takes 13 hours, 20 minutes and 2.0473 seconds to travel from Southern Comet (C/1947 X1-A) and arrive to us.

13 hours, 20 minutes and 2.0473 seconds

The following chart shows the distance of Southern Comet (C/1947 X1-A) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Southern Comet (C/1947 X1-A) from Earth between January 1900 and January 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/1947 X1-A (Southern Comet) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Southern Comet (C/1947 X1-A) to Earth

Between January 1900 and January 2100, the closest approach of Southern Comet (C/1947 X1-A) to Earth happens on Sun Dec 7 1947 at a distance of 0.850110 Astronomical Units, or 127,174,683 kilometers:

Sun Dec 7 1947

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Southern Comet (C/1947 X1-A) brightness

The current visual magnitude of Southern Comet (C/1947 X1-A) is -100.00.


The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behavior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

Southern Comet (C/1947 X1-A) rise and set times

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

Today's Southern Comet (C/1947 X1-A) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 94.3°
Max altitude: 34.2°
Azimuth: 265.7°

The rise and set times are defined as the time at which the upper limb of Southern Comet (C/1947 X1-A) touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Southern Comet (C/1947 X1-A) Orbital Elements

The following table lists the orbital elements of Southern Comet (C/1947 X1-A) at epoch 01 January 1970 00:00 UTC (JD: 2432538.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99984247
Orbit inclination i 138.51140474°
Perihelion distance q 0.11000465 AU
16,456,461 km
Aphelion distance Q 1,396.47659602 AU
208,909,925,666 km
Semi-major axis a 698.29330033 AU
104,463,191,064 km
Orbital period period 18,452.9200 years
6,739,927.7306 days
Date of perihelion transit Tp 1947-Dec-02 14:04:30
2,432,522.0865 JD
Next perihelion transit 20401-Mar-19 07:36
9,172,449.8171 JD
Argument of perihelion peri 196.18200763771°
Longitude of the ascending node node 337.3115288068°
Mean anomaly M 0.00087669652355372°
Mean motion n 0.00005341°/day

Visualization of Southern Comet (C/1947 X1-A) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Southern Comet (C/1947 X1-A) with respect of the Sun and the orbits of the major planets. The position of Southern Comet (C/1947 X1-A) and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Southern Comet (C/1947 X1-A)
View Southern Comet (C/1947 X1-A) in the 3D Solar System Simulator

Southern Comet (C/1947 X1-A) 15 Days Ephemeris

The following table lists the ephemerides of Southern Comet (C/1947 X1-A) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Southern Comet (C/1947 X1-A) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 May 01 21h 50m 48s -04° 18’ 24” N.A. Aquarius
2021 May 02 21h 50m 48s -04° 18’ 15” N.A. Aquarius
2021 May 03 21h 50m 49s -04° 18’ 07” N.A. Aquarius
2021 May 04 21h 50m 49s -04° 17’ 59” N.A. Aquarius
2021 May 05 21h 50m 51s -04° 17’ 52” N.A. Aquarius
2021 May 06 21h 50m 51s -04° 17’ 44” N.A. Aquarius
2021 May 07 21h 50m 52s -04° 17’ 35” N.A. Aquarius
2021 May 08 21h 50m 52s -04° 17’ 27” N.A. Aquarius
2021 May 09 21h 50m 52s -04° 17’ 21” N.A. Aquarius
2021 May 10 21h 50m 53s -04° 17’ 13” N.A. Aquarius
2021 May 11 21h 50m 53s -04° 17’ 07” N.A. Aquarius
2021 May 12 21h 50m 53s -04° 16’ 59” N.A. Aquarius
2021 May 13 21h 50m 53s -04° 16’ 54” N.A. Aquarius
2021 May 14 21h 50m 53s -04° 16’ 46” N.A. Aquarius