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🌎  Greenwich, United Kingdom [change]

Comet 161P/Hartley-IRAS

Comet 161P/Hartley-IRAS is currently in the constellation of Vela. The current Right Ascension of Comet 161P/Hartley-IRAS is 08h 47m 17s and the Declination is -49° 51’ 29” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 161P/Hartley-IRAS is 28.41 (JPL).

Summary of key facts about Comet 161P/Hartley-IRAS [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]:

08h 47m 17s
-49° 51’ 29”

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Additional information about Comet 161P/Hartley-IRAS available on TheSkyLive:

Available Resources

Comet 161P/Hartley-IRAS Position and Finder Charts

Below we provide Comet 161P/Hartley-IRAS 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 161P/Hartley-IRAS in Vela on August, 16 2022
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 161P/Hartley-IRAS in Vela on August, 16 2022
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 161P/Hartley-IRAS is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 08h 47m 17s
Dec: -49° 51’ 29”
Deep sky finder chart for Comet 161P/Hartley-IRAS
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 161P/Hartley-IRAS?, a page that provides all the information needed to find Comet 161P/Hartley-IRAS in the sky and additional links to sky charts.

Comet 161P/Hartley-IRAS Distance from Earth

The distance of Comet 161P/Hartley-IRAS from Earth is currently 1,624,326,183 kilometers, equivalent to 10.857950 Astronomical Units. Light takes 1 hours, 30 minutes and 18.1689 seconds to travel from Comet 161P/Hartley-IRAS and arrive to us.

1 hours, 30 minutes and 18.1689 seconds

The following chart shows the distance of Comet 161P/Hartley-IRAS 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 161P/Hartley-IRAS 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 161P/Hartley-IRAS from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 161P/Hartley-IRAS to Earth

Between January 2013 and December 2100, the closest approach of Comet 161P/Hartley-IRAS to Earth happens on Fri Oct 2 2026 at a distance of 0.505482 Astronomical Units, or 75,618,969 kilometers:

Fri Oct 2 2026

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

Comet 161P/Hartley-IRAS brightness

The current visual magnitude of Comet 161P/Hartley-IRAS is 28.41.


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 161P/Hartley-IRAS, 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 161P/Hartley-IRAS between January 2013 and December 2100

Comet 161P/Hartley-IRAS rise and set times

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

Comet 161P/Hartley-IRAS is currently not visible from Greenwich, United Kingdom [change]

The rise and set times are defined as the time at which the upper limb of Comet 161P/Hartley-IRAS 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 161P/Hartley-IRAS Orbital Elements

The following table lists the orbital elements of Comet 161P/Hartley-IRAS at epoch 03 July 2004 00:00 UTC (JD: 2453190.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.83508810
Orbit inclination i 95.69805020°
Perihelion distance q 1.27482939 AU
190,711,762 km
Aphelion distance Q 14.18590285 AU
2,122,180,865 km
Semi-major axis a 7.73036612 AU
1,156,446,313 km
Orbital period period 21.4936 years
7,850.5218 days
Date of perihelion transit Tp 2005-Jun-20 20:24:46
2,453,542.3505 JD
Next perihelion transit 2026-Dec-18 08:56
2,461,392.8723 JD
Argument of perihelion peri 47.091452375467°
Longitude of the ascending node node 1.3981653712267°
Mean anomaly M 343.86525171541°
Mean motion n 0.04585682°/day

Visualization of Comet 161P/Hartley-IRAS Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 161P/Hartley-IRAS with respect of the Sun and the orbits of the major planets. The position of Comet 161P/Hartley-IRAS 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 161P/Hartley-IRAS
View Comet 161P/Hartley-IRAS in the 3D Solar System Simulator

Comet 161P/Hartley-IRAS 15 Days Ephemeris

The following table lists the ephemerides of Comet 161P/Hartley-IRAS computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 161P/Hartley-IRAS in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2022 Aug 09 08h 43m 53s -49° 37’ 44” 28.42 Vela
2022 Aug 10 08h 44m 21s -49° 39’ 20” 28.42 Vela
2022 Aug 11 08h 44m 48s -49° 41’ 00” 28.42 Vela
2022 Aug 12 08h 45m 15s -49° 42’ 46” 28.42 Vela
2022 Aug 13 08h 45m 42s -49° 44’ 35” 28.41 Vela
2022 Aug 14 08h 46m 10s -49° 46’ 28” 28.41 Vela
2022 Aug 15 08h 46m 37s -49° 48’ 28” 28.41 Vela
2022 Aug 16 08h 47m 04s -49° 50’ 30” 28.41 Vela
2022 Aug 17 08h 47m 31s -49° 52’ 37” 28.41 Vela
2022 Aug 18 08h 48m 00s -49° 54’ 48” 28.40 Vela
2022 Aug 19 08h 48m 26s -49° 57’ 06” 28.40 Vela
2022 Aug 20 08h 48m 53s -49° 59’ 26” 28.40 Vela
2022 Aug 21 08h 49m 19s -50° 01’ 50” 28.40 Vela
2022 Aug 22 08h 49m 46s -50° 04’ 19” 28.40 Vela