Comet 77P/Longmore is currently in the constellation of Perseus. The current Right Ascension of Comet 77P/Longmore is 04h 23m 42s and the Declination is +39° 28’ 03” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 77P/Longmore is 21.75 (JPL).
Summary of key facts about Comet 77P/Longmore [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]:
- 77P/Longmore is above the horizon from Greenwich, United Kingdom [change].
- It is visible looking in the South-East direction at an altitude of 73° above the horizon.
- Given its current magnitude, 77P/Longmore is visible only through long exposure photography.
- See also 77P/Longmore rise and set times.
- Go to interactive sky chart
If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.
Additional information about Comet 77P/Longmore available on TheSkyLive:
Comet 77P/Longmore Position and Finder Charts
Below we provide Comet 77P/Longmore 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.
Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet 77P/Longmore is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Comet 77P/Longmore?, a page that provides all the information needed to find Comet 77P/Longmore in the sky and additional links to sky charts.
Comet 77P/Longmore Distance from Earth
The distance of Comet 77P/Longmore from Earth is currently 760,549,605 kilometers, equivalent to 5.083960 Astronomical Units. Light takes 42 minutes and 16.9204 seconds to travel from Comet 77P/Longmore and arrive to us.
The following chart shows the distance of Comet 77P/Longmore 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.
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 77P/Longmore from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest approach of Comet 77P/Longmore to Earth
Between January 2013 and December 2100, the closest approach of Comet 77P/Longmore to Earth happens on Sun Apr 22 2063 at a distance of 1.005967 Astronomical Units, or 150,490,463 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Comet 77P/Longmore brightness
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 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.
Comet 77P/Longmore rise and set times
Comet 77P/Longmore is circumpolar and transits at 13:01 UTC (altitude: 78.0°)
The rise and set times are defined as the time at which the upper limb of Comet 77P/Longmore 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 77P/Longmore Orbital Elements
|Perihelion distance||q||2.31109854 AU
|Date of perihelion transit||Tp||2009-Jul-07 23:20:04
|Next perihelion transit||2016-May-06 03:55
|Argument of perihelion||peri||196.75230019549°|
|Longitude of the ascending node||node||14.912855119912°|
Visualization of Comet 77P/Longmore Orbit
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!
Comet 77P/Longmore 15 Days 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.
|2021 May 05||04h 13m 56s||+39° 09’ 51”||21.77||Perseus|
|2021 May 06||04h 15m 14s||+39° 12’ 15”||21.77||Perseus|
|2021 May 07||04h 16m 32s||+39° 14’ 39”||21.76||Perseus|
|2021 May 08||04h 17m 48s||+39° 17’ 04”||21.76||Perseus|
|2021 May 09||04h 19m 06s||+39° 19’ 30”||21.76||Perseus|
|2021 May 10||04h 20m 26s||+39° 21’ 56”||21.76||Perseus|
|2021 May 11||04h 21m 43s||+39° 24’ 23”||21.76||Perseus|
|2021 May 12||04h 23m 03s||+39° 26’ 49”||21.75||Perseus|
|2021 May 13||04h 24m 23s||+39° 29’ 17”||21.75||Perseus|
|2021 May 14||04h 25m 41s||+39° 31’ 45”||21.75||Perseus|
|2021 May 15||04h 27m 02s||+39° 34’ 14”||21.75||Perseus|
|2021 May 16||04h 28m 22s||+39° 36’ 42”||21.74||Perseus|
|2021 May 17||04h 29m 43s||+39° 39’ 11”||21.74||Perseus|
|2021 May 18||04h 31m 03s||+39° 41’ 42”||21.74||Perseus|