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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 Aquarius on January, 22 2018
High Precision Live Sky Chart
22h 38m 18s
-21° 25’ 12”
21.55
 = 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: 111.4°
Max altitude: 17.1°
Azimuth: 248.6°

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 Jan 15 21.48 22h 31m 28s -22° 27’ 43” Aquarius
2018 Jan 16 21.49 22h 32m 26s -22° 18’ 46” Aquarius
2018 Jan 17 21.50 22h 33m 24s -22° 09’ 48” Aquarius
2018 Jan 18 21.51 22h 34m 23s -22° 00’ 51” Aquarius
2018 Jan 19 21.52 22h 35m 21s -21° 51’ 56” Aquarius
2018 Jan 20 21.53 22h 36m 20s -21° 43’ 00” Aquarius
2018 Jan 21 21.54 22h 37m 19s -21° 34’ 05” Aquarius
2018 Jan 22 21.55 22h 38m 18s -21° 25’ 12” Aquarius
2018 Jan 23 21.56 22h 39m 18s -21° 16’ 18” Aquarius
2018 Jan 24 21.57 22h 40m 17s -21° 07’ 26” Aquarius
2018 Jan 25 21.58 22h 41m 16s -20° 58’ 33” Aquarius
2018 Jan 26 21.59 22h 42m 15s -20° 49’ 42” Aquarius
2018 Jan 27 21.59 22h 43m 14s -20° 40’ 53” Aquarius
2018 Jan 28 21.60 22h 44m 13s -20° 32’ 03” Aquarius

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 22 June 2010 00:00 UTC (JD: 2455370.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.35791786
Orbit inclination i 24.39914389°
Perihelion distance q 2.31091605 AU
345,708,122 km
Aphelion distance Q 4.88727838 AU
731,126,441 km
Semi-major axis a 3.59909722 AU
538,417,282 km
Orbital period period 6.8300 years
2,493.9560 days
Date of perihelion transit Tp 2009-Jul-07 22:46:39
2,455,020.4491 JD
Next perihelion transit 2016-May-05 21:43
2,457,514.4051 JD
Argument of perihelion peri 196.74055723452°
Longitude of the ascending node node 14.913499477555°
Mean anomaly M 50.529493216063°
Mean motion n 0.14434898°/day
Closest approach to Earth* 2063-Apr-22
Distance of closest approach* 1.00596911 AU
150,490,837 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.