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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 Pisces on October, 17 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
00h 06m 34s
-05° 41’ 51”

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.

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 Europe/London timezone.

Azimuth: 95.7°
Max altitude: 32.8°
Azimuth: 264.3°

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 Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Oct 10 00h 11m 12s -05° 35’ 58” 21.81 Pisces
2018 Oct 11 00h 10m 32s -05° 37’ 00” 21.82 Pisces
2018 Oct 12 00h 09m 51s -05° 37’ 59” 21.83 Pisces
2018 Oct 13 00h 09m 11s -05° 38’ 53” 21.83 Pisces
2018 Oct 14 00h 08m 32s -05° 39’ 43” 21.84 Pisces
2018 Oct 15 00h 07m 54s -05° 40’ 29” 21.85 Pisces
2018 Oct 16 00h 07m 15s -05° 41’ 11” 21.85 Pisces
2018 Oct 17 00h 06m 38s -05° 41’ 48” 21.86 Pisces
2018 Oct 18 00h 06m 00s -05° 42’ 20” 21.87 Pisces
2018 Oct 19 00h 05m 24s -05° 42’ 48” 21.88 Pisces
2018 Oct 20 00h 04m 48s -05° 43’ 13” 21.88 Pisces
2018 Oct 21 00h 04m 12s -05° 43’ 32” 21.89 Pisces
2018 Oct 22 00h 03m 37s -05° 43’ 45” 21.90 Pisces
2018 Oct 23 00h 03m 02s -05° 43’ 55” 21.91 Pisces

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 30 June 2010 00:00 UTC (JD: 2455378.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.35791517
Orbit inclination i 24.39917477°
Perihelion distance q 2.31096978 AU
345,716,159 km
Aphelion distance Q 4.88736192 AU
731,138,938 km
Semi-major axis a 3.59916585 AU
538,427,548 km
Orbital period period 6.8300 years
2,494.0274 days
Date of perihelion transit Tp 2009-Jul-07 22:57:01
2,455,020.4563 JD
Next perihelion transit 2016-May-05 23:36
2,457,514.4836 JD
Argument of perihelion peri 196.74412611414°
Longitude of the ascending node node 14.913278177474°
Mean anomaly M 51.681767381935°
Mean motion n 0.14434485°/day
Closest approach to Earth* 2063-Apr-22
Distance of closest approach* 1.00596815 AU
150,490,693 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.