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

Comet 25D/Neujmin 2

Comet 25D/Neujmin 2 is currently in the constellation of Capricornus. The current Right Ascension of Comet 25D/Neujmin 2 is 20h 47m 34s and the Declination is -17° 34’ 44” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 25D/Neujmin 2 is 25.16 (JPL).

Summary of key facts about Comet 25D/Neujmin 2 [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]:

20h 47m 34s
-17° 34’ 44”
  • 25D/Neujmin 2 is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-West direction at an altitude of 11° above the horizon.
  • Given its current magnitude, 25D/Neujmin 2 is visible only through long exposure photography.
  • See also 25D/Neujmin 2 rise and set times.
  • Go to interactive sky chart

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 Comet 25D/Neujmin 2 available on TheSkyLive:

Available Resources

Comet 25D/Neujmin 2 Position and Finder Charts

Below we provide Comet 25D/Neujmin 2 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 Comet 25D/Neujmin 2 in Capricornus on January, 21 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 25D/Neujmin 2 in Capricornus on January, 21 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 Comet 25D/Neujmin 2 is right now. Click on the image to see a more detailed fullscreen tracker view.

25D/Neujmin 2
RA: 20h 47m 34s
Dec: -17° 34’ 44”
Deep sky finder chart for Comet 25D/Neujmin 2
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 25D/Neujmin 2?, a page that provides all the information needed to find Comet 25D/Neujmin 2 in the sky and additional links to sky charts.

Comet 25D/Neujmin 2 Distance from Earth

The distance of Comet 25D/Neujmin 2 from Earth is currently 754,174,339 kilometers, equivalent to 5.041344 Astronomical Units. Light takes 41 minutes and 55.6548 seconds to travel from Comet 25D/Neujmin 2 and arrive to us.

41 minutes and 55.6548 seconds

The following chart shows the distance of Comet 25D/Neujmin 2 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 Comet 25D/Neujmin 2 from Earth between January 2013 and December 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 25D/Neujmin 2 from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 25D/Neujmin 2 to Earth

Between January 2013 and December 2100, the closest approach of Comet 25D/Neujmin 2 to Earth happens on Wed Feb 26 2014 at a distance of 0.341287 Astronomical Units, or 51,055,776 kilometers:

Wed Feb 26 2014

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

Comet 25D/Neujmin 2 brightness

The current visual magnitude of Comet 25D/Neujmin 2 is 25.16.


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.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 25D/Neujmin 2, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Comet 25D/Neujmin 2 between January 2013 and December 2100

Comet 25D/Neujmin 2 rise and set times

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

Today's Comet 25D/Neujmin 2 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 107.6°
Max altitude: 20.9°
Azimuth: 252.4°

The rise and set times are defined as the time at which the upper limb of Comet 25D/Neujmin 2 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.

Comet 25D/Neujmin 2 Orbital Elements

The following table lists the orbital elements of Comet 25D/Neujmin 2 at epoch 01 January 1970 00:00 UTC (JD: 2424960.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.56681860
Orbit inclination i 10.63871310°
Perihelion distance q 1.33816965 AU
200,187,330 km
Aphelion distance Q 4.84016412 AU
724,078,248 km
Semi-major axis a 3.08916688 AU
462,132,789 km
Orbital period period 5.4300 years
1,983.1725 days
Date of perihelion transit Tp 1927-Jan-16 05:22:43
2,424,896.7241 JD
Next perihelion transit 1932-Jun-21 09:31
2,426,879.8966 JD
Argument of perihelion peri 193.7040335562°
Longitude of the ascending node node 328.71695096572°
Mean anomaly M 11.577066231236°
Mean motion n 0.18152733°/day

Visualization of Comet 25D/Neujmin 2 Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 25D/Neujmin 2 with respect of the Sun and the orbits of the major planets. The position of Comet 25D/Neujmin 2 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 Comet 25D/Neujmin 2
View Comet 25D/Neujmin 2 in the 3D Solar System Simulator

Comet 25D/Neujmin 2 15 Days Ephemeris

The following table lists the ephemerides of Comet 25D/Neujmin 2 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 25D/Neujmin 2 in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 14 20h 39m 20s -18° 09’ 21” 25.09 Capricornus
2021 Jan 15 20h 40m 24s -18° 04’ 54” 25.10 Capricornus
2021 Jan 16 20h 41m 30s -18° 00’ 24” 25.11 Capricornus
2021 Jan 17 20h 42m 34s -17° 55’ 54” 25.12 Capricornus
2021 Jan 18 20h 43m 38s -17° 51’ 24” 25.12 Capricornus
2021 Jan 19 20h 44m 44s -17° 46’ 50” 25.13 Capricornus
2021 Jan 20 20h 45m 47s -17° 42’ 17” 25.14 Capricornus
2021 Jan 21 20h 46m 51s -17° 37’ 41” 25.15 Capricornus
2021 Jan 22 20h 47m 57s -17° 33’ 06” 25.16 Capricornus
2021 Jan 23 20h 49m 00s -17° 28’ 28” 25.17 Capricornus
2021 Jan 24 20h 50m 04s -17° 23’ 51” 25.18 Capricornus
2021 Jan 25 20h 51m 08s -17° 19’ 10” 25.18 Capricornus
2021 Jan 26 20h 52m 12s -17° 14’ 30” 25.19 Capricornus
2021 Jan 27 20h 53m 16s -17° 09’ 48” 25.20 Capricornus