We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
Help keep this site free and ads-free: donate now!
public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 12:58 
Sunset: 21:15
sunny   (Daytime)   What's Visible Now?

Comet 77P/Longmore

Below the horizon.  Rise: 4:01 | Tran: 6:34 | Set: 9:07
Altitude: -63.4°   Azimuth: 307.8°   Direction: North-West

Comet 77P/Longmore is currently in the constellation of Pisces Austrinus, at a distance of 451,654,368 kilometers from Earth. The current Right Ascension of Comet 77P/Longmore is 23h 06m 32s and the Declination is -31° 57’ 21” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom). The current estimated magnitude of Comet 77P/Longmore is 19.51 (JPL).

Finder chart of 77P/Longmore in Pisces Austrinus on June,14 2024
Map showing Comet 77P/Longmore in Pisces Austrinus on June, 14 2024. Field of view: 50x30 degrees
View interactive star map

23h 06m 32s
-31° 57’ 21”
Pisces Austrinus

The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted 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.

Today's rise, transit and set times of Comet 77P/Longmore from Greenwich, United Kingdom (all times relative to the local timezone Europe/London):

Azimuth: 121.9°
Max altitude: 6.6°
Azimuth: 238.1°

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 Resources

Comet 77P/Longmore Position and Finder Charts

Finder chart of 77P/Longmore
Map showing Comet 77P/Longmore in Pisces Austrinus on June, 14 2024
Field of view: 10x6 degrees
View fullscreen

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.

RA: 23h 06m 32s
Dec: -31° 57’ 21”
Deep sky finder chart for Comet 77P/Longmore
Field of view: 60x40 arcmins
View fullscreen

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 451,654,368 kilometers, equivalent to 3.019123 Astronomical Units. Light takes 25 minutes and 6.5568 seconds to travel from Comet 77P/Longmore and arrive to us.

25 minutes and 6.5568 seconds

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.

Chart of the distance of Comet 77P/Longmore from Earth in Astronomical Units (au)

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 1 January 2013 and 30 December 2100, the closest approach of Comet 77P/Longmore to Earth happens on Sun Apr 22 2063 at a distance of 1.005949 Astronomical Units, or 150,487,808 kilometers:

Sun Apr 22 2063

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

Comet 77P/Longmore Brightness and Light Curve

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.

Chart of the magnitude of Comet 77P/Longmore as a function of time

Comet 77P/Longmore Orbital Elements

The following table lists the orbital elements of Comet 77P/Longmore at epoch 19 May 2011 00:00 UTC (JD: 2455701.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.35722445
Orbit inclination i 24.39989618°
Perihelion distance q 2.31633337 AU
346,518,541 km
Aphelion distance Q 4.89095194 AU
731,675,997 km
Semi-major axis a 3.60364266 AU
539,097,269 km
Orbital period period 6.8410 years
2,498.6821 days
Date of perihelion transit Tp 2009-Jul-08 01:51:19
2,455,020.5773 JD
Next perihelion transit 2016-May-10 18:13
2,457,519.2594 JD
Argument of perihelion peri 196.95865461186°
Longitude of the ascending node node 14.909174866021°
Mean anomaly M 98.104583831402°
Mean motion n 0.14407595°/day

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!

Orbit Diagram of Comet 77P/Longmore
View Comet 77P/Longmore in the 3D Solar System Simulator

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.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2024 Jun 07 23h 03m 55s -31° 39’ 42” 19.52 Pisces Austrinus
2024 Jun 08 23h 04m 18s -31° 41’ 39” 19.52 Pisces Austrinus
2024 Jun 09 23h 04m 42s -31° 43’ 41” 19.52 Pisces Austrinus
2024 Jun 10 23h 05m 04s -31° 45’ 51” 19.52 Pisces Austrinus
2024 Jun 11 23h 05m 26s -31° 48’ 06” 19.52 Pisces Austrinus
2024 Jun 12 23h 05m 45s -31° 50’ 30” 19.52 Pisces Austrinus
2024 Jun 13 23h 06m 05s -31° 52’ 58” 19.51 Pisces Austrinus
2024 Jun 14 23h 06m 21s -31° 55’ 33” 19.51 Pisces Austrinus
2024 Jun 15 23h 06m 38s -31° 58’ 14” 19.51 Pisces Austrinus
2024 Jun 16 23h 06m 52s -32° 01’ 01” 19.51 Sculptor
2024 Jun 17 23h 07m 06s -32° 03’ 56” 19.51 Sculptor
2024 Jun 18 23h 07m 18s -32° 06’ 56” 19.51 Sculptor
2024 Jun 19 23h 07m 29s -32° 10’ 00” 19.51 Sculptor
2024 Jun 20 23h 07m 40s -32° 13’ 11” 19.51 Sculptor