Comet 77P/Longmore
Comet 77P/Longmore is in the constellation of
Pisces Austrinus,
at a distance of
Finder Charts
View interactive star map
High 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.
Celestial Coordinates
Apparent
J2000
Additional Information
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.
Rise and Set Times
Today's rise, transit and set times of Comet 77P/Longmore from Greenwich, UK (all times relative to the local timezone Europe/London):
- 77P/Longmore is below the horizon from Greenwich, UK.
- Given its current magnitude, 77P/Longmore is visible only through long exposure photography.
- 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.
Distance from Earth
The distance of Comet 77P/Longmore from Earth is currently
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
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:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
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.
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 |
Orbit Visualization
View Comet 77P/Longmore in the 3D Solar System Simulator
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. Apparent celestial coordinates are provided.
| Date | Right AscensionR.A. | DeclinationDec. | MagnitudeMag | Constellation |
|---|---|---|---|---|
| 2024 Nov 30 | 22h 10m 06s | -26° 44’ 02” | 21.00 | Pisces Austrinus |
| 2024 Dec 01 | 22h 10m 40s | -26° 35’ 22” | 21.01 | Pisces Austrinus |
| 2024 Dec 02 | 22h 11m 15s | -26° 26’ 42” | 21.02 | Pisces Austrinus |
| 2024 Dec 03 | 22h 11m 51s | -26° 18’ 03” | 21.04 | Pisces Austrinus |
| 2024 Dec 04 | 22h 12m 27s | -26° 09’ 21” | 21.05 | Pisces Austrinus |
| 2024 Dec 05 | 22h 13m 03s | -26° 00’ 41” | 21.06 | Pisces Austrinus |
| 2024 Dec 06 | 22h 13m 40s | -25° 51’ 59” | 21.08 | Pisces Austrinus |
| 2024 Dec 07 | 22h 14m 18s | -25° 43’ 16” | 21.09 | Pisces Austrinus |
| 2024 Dec 08 | 22h 14m 57s | -25° 34’ 34” | 21.10 | Pisces Austrinus |
| 2024 Dec 09 | 22h 15m 36s | -25° 25’ 50” | 21.11 | Pisces Austrinus |
| 2024 Dec 10 | 22h 16m 15s | -25° 17’ 07” | 21.13 | Pisces Austrinus |
| 2024 Dec 11 | 22h 16m 56s | -25° 08’ 24” | 21.14 | Pisces Austrinus |
| 2024 Dec 12 | 22h 17m 36s | -24° 59’ 39” | 21.15 | Pisces Austrinus |
| 2024 Dec 13 | 22h 18m 18s | -24° 50’ 55” | 21.16 | Pisces Austrinus |
Additional Resources
- Position and finder charts (see also Where is Comet 77P/Longmore?)
- Distance from Earth (see also How far is Comet 77P/Longmore from Earth?)
- When does Comet 77P/Longmore rise and set?
- Brightness (see also How bright is Comet 77P/Longmore?)
- Orbital elements. Detailed information about Comet 77P/Longmore orbital parameters.
- Interactive orbit visualization. 3d visualization showing the orbit of Comet 77P/Longmore with respect to the major Solar System objects.
- 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet 77P/Longmore for the past and next 7 days.
- Interactive sky chart. An online planetarium application that shows where to locate Comet 77P/Longmore in the sky from your location.
- Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet 77P/Longmore with your telescope or on your astrophotographies.