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Comet 261P/Larson

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Comet 261P/Larson Position

Comet 261P/Larson is currently in the constellation of Pisces. The current Right Ascension is 01h 25m 02s and the Declination is +14° 16’ 39”.

01h 25m 02s
+14° 16’ 39”

Simplified sky chart showing where Comet 261P/Larson is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet 261P/Larson in Pisces on June, 19 2019
Field of view: 60x30 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]

Hihgher precision deep sky finder chart showing where Comet 261P/Larson is right now (view fullscreen)

RA: 01h 25m 02s
Dec: +14° 16’ 39”
Deep sky finder chart for Comet 261P/Larson
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 261P/Larson?, a page that provides all the information needed to find Comet 261P/Larson in the sky and additional links to sky charts.

Comet 261P/Larson Distance

The distance of Comet 261P/Larson from Earth is currently 339,936,669 kilometers, equivalent to 2.272336 Astronomical Units. Light takes 18 minutes and 53.9067 seconds to travel from Comet 261P/Larson and arrive to us.

18 minutes and 53.9067 seconds

The following chart shows the distance of Comet 261P/Larson 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 261P/Larson from Earth between January 2013 and December 2075

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 261P/Larson from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 261P/Larson to Earth

Between January 2013 and December 2075 the closest approach of Comet 261P/Larson to Earth happens on Sat Sep 12 2065 at a distance of 1.08277330 Astronomical Units, or 161,980,581 kilometers:

Sat Sep 12 2065

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

Comet 261P/Larson brightness

The current visual magnitude of Comet 261P/Larson is 17.43.


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 behvior 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 261P/Larson, 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 261P/Larson between January 2013 and December 2075

Comet 261P/Larson 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 261P/Larson rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 75.7°
Max altitude: 52.9°
Azimuth: 284.4°
Comet 261P/Larson is above the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Comet 261P/Larson touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet 261P/Larson Orbital Elements

The following table lists the orbital elements of Comet 261P/Larson at epoch 24 March 2010 00:00 UTC (JD: 2455280.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.38954338
Orbit inclination i 6.32290990°
Perihelion distance q 2.18978132 AU
327,586,623 km
Aphelion distance Q 4.98445923 AU
745,664,489 km
Semi-major axis a 3.58712028 AU
536,625,556 km
Orbital period period 6.7900 years
2,481.5175 days
Date of perihelion transit Tp 2012-Sep-28 17:31:18
2,456,199.2301 JD
Next perihelion transit 2019-Jul-16 05:56
2,458,680.7475 JD
Argument of perihelion peri 58.595491292904°
Longitude of the ascending node node 298.53506952825°
Mean anomaly M 226.71751004903°
Mean motion n 0.14507252°/day

Visualization of Comet 261P/Larson Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 261P/Larson with respect of the Sun and the orbits of the major planets. The position of Comet 261P/Larson 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 261P/Larson
View Comet 261P/Larson in the 3D Solar System Simulator

Comet 261P/Larson 15 Days Ephemeris

The following table lists the ephemerides of Comet 261P/Larson computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 261P/Larson in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Jun 12 01h 11m 09s +12° 39’ 25” 17.49 Pisces
2019 Jun 13 01h 13m 09s +12° 53’ 27” 17.48 Pisces
2019 Jun 14 01h 15m 07s +13° 07’ 27” 17.47 Pisces
2019 Jun 15 01h 17m 07s +13° 21’ 21” 17.46 Pisces
2019 Jun 16 01h 19m 05s +13° 35’ 12” 17.45 Pisces
2019 Jun 17 01h 21m 03s +13° 49’ 00” 17.44 Pisces
2019 Jun 18 01h 23m 02s +14° 02’ 43” 17.44 Pisces
2019 Jun 19 01h 25m 00s +14° 16’ 22” 17.43 Pisces
2019 Jun 20 01h 26m 57s +14° 29’ 57” 17.42 Pisces
2019 Jun 21 01h 28m 55s +14° 43’ 27” 17.41 Pisces
2019 Jun 22 01h 30m 52s +14° 56’ 54” 17.41 Pisces
2019 Jun 23 01h 32m 51s +15° 10’ 17” 17.40 Pisces
2019 Jun 24 01h 34m 48s +15° 23’ 34” 17.39 Pisces
2019 Jun 25 01h 36m 43s +15° 36’ 47” 17.38 Pisces