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Comet 77P/Longmore

Available Resources

Comet 77P/Longmore Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 77P/Longmore is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Comet 77P/Longmore in Cetus on April, 23 2018
High Precision Live Sky Chart
00h 05m 52s
-09° 24’ 20”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet 77P/Longmore Rise and Set Times

Today's Comet 77P/Longmore rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 99.4°
Max altitude: 29.1°
Azimuth: 260.6°

Comet 77P/Longmore Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 77P/Longmore with respect of the Sun and the orbits of the major planets. The position of Comet 77P/Longmore 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 77P/Longmore
View Comet 77P/Longmore in the 3D Solar System Simulator

Comet 77P/Longmore Ephemeris

The following table lists the ephemerides of Comet 77P/Longmore computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 77P/Longmore in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Apr 16 22.01 23h 59m 50s -10° 10’ 18” Cetus
2018 Apr 17 22.01 00h 00m 42s -10° 03’ 37” Cetus
2018 Apr 18 22.01 00h 01m 35s -09° 56’ 57” Cetus
2018 Apr 19 22.01 00h 02m 26s -09° 50’ 21” Cetus
2018 Apr 20 22.01 00h 03m 19s -09° 43’ 46” Cetus
2018 Apr 21 22.01 00h 04m 09s -09° 37’ 14” Cetus
2018 Apr 22 22.01 00h 05m 00s -09° 30’ 47” Cetus
2018 Apr 23 22.01 00h 05m 52s -09° 24’ 20” Cetus
2018 Apr 24 22.02 00h 06m 42s -09° 17’ 57” Cetus
2018 Apr 25 22.02 00h 07m 32s -09° 11’ 38” Cetus
2018 Apr 26 22.02 00h 08m 21s -09° 05’ 20” Cetus
2018 Apr 27 22.02 00h 09m 11s -08° 59’ 05” Cetus
2018 Apr 28 22.02 00h 10m 00s -08° 52’ 54” Cetus
2018 Apr 29 22.02 00h 10m 49s -08° 46’ 45” Cetus

Distance of Comet 77P/Longmore from Earth

The following chart shows the distance of Comet 77P/Longmore from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 77P/Longmore is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 77P/Longmore from Earth between January 2013 and December 2075

Light Curve of Comet 77P/Longmore

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 77P/Longmore, 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 77P/Longmore between January 2013 and December 2075

Comet 77P/Longmore Orbital Elements

The following table lists the orbital elements of Comet 77P/Longmore at epoch 25 June 2010 00:00 UTC (JD: 2455373.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.35791688
Orbit inclination i 24.39915525°
Perihelion distance q 2.31093570 AU
345,711,061 km
Aphelion distance Q 4.88730904 AU
731,131,027 km
Semi-major axis a 3.59912237 AU
538,421,044 km
Orbital period period 6.8300 years
2,493.9822 days
Date of perihelion transit Tp 2009-Jul-07 22:50:28
2,455,020.4517 JD
Next perihelion transit 2016-May-05 22:24
2,457,514.4339 JD
Argument of perihelion peri 196.7418700749°
Longitude of the ascending node node 14.913415006414°
Mean anomaly M 50.961623258556°
Mean motion n 0.14434746°/day
Closest approach to Earth* 2063-Apr-22
Distance of closest approach* 1.00596851 AU
150,490,747 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.