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Comet C/2017 E4 (Lovejoy)

Available Resources

Comet C/2017 E4 (Lovejoy) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 E4 (Lovejoy) 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 C/2017 E4 (Lovejoy) in Orion on July, 25 2017
High Precision Live Sky Chart
04h 51m 06s
+01° 38’ 08”
25.64
 = 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 C/2017 E4 (Lovejoy) Rise and Set Times

Today's Comet C/2017 E4 (Lovejoy) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 88.4°
Max altitude: 40.2°
Azimuth: 271.6°

Comet C/2017 E4 (Lovejoy) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 E4 (Lovejoy) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 E4 (Lovejoy) 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 C/2017 E4 (Lovejoy)
View Comet C/2017 E4 (Lovejoy) in the 3D Solar System Simulator

Comet C/2017 E4 (Lovejoy) Ephemeris

The following table lists the ephemerides of Comet C/2017 E4 (Lovejoy) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2017 E4 (Lovejoy) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Jul 18 24.86 04h 44m 48s +04° 06’ 32” Orion
2017 Jul 19 24.97 04h 45m 47s +03° 45’ 34” Orion
2017 Jul 20 25.09 04h 46m 42s +03° 24’ 33” Orion
2017 Jul 21 25.20 04h 47m 38s +03° 03’ 25” Orion
2017 Jul 22 25.31 04h 48m 32s +02° 42’ 15” Orion
2017 Jul 23 25.42 04h 49m 24s +02° 20’ 57” Orion
2017 Jul 24 25.53 04h 50m 16s +01° 59’ 35” Orion
2017 Jul 25 25.64 04h 51m 06s +01° 38’ 08” Orion
2017 Jul 26 25.74 04h 51m 56s +01° 16’ 33” Orion
2017 Jul 27 25.85 04h 52m 44s +00° 54’ 55” Orion
2017 Jul 28 25.95 04h 53m 30s +00° 33’ 08” Orion
2017 Jul 29 26.05 04h 54m 16s +00° 11’ 17” Orion
2017 Jul 30 26.15 04h 55m 01s -00° 10’ 39” Orion
2017 Jul 31 26.25 04h 55m 45s -00° 32’ 43” Orion

Distance of Comet C/2017 E4 (Lovejoy) from Earth

The following chart shows the distance of Comet C/2017 E4 (Lovejoy) 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 C/2017 E4 (Lovejoy) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 E4 (Lovejoy) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 E4 (Lovejoy)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 E4 (Lovejoy), 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 C/2017 E4 (Lovejoy) between January 2013 and December 2075

Comet C/2017 E4 (Lovejoy) Orbital Elements

The following table lists the orbital elements of Comet C/2017 E4 (Lovejoy) at epoch 30 March 2017 00:00 UTC (JD: 2457843.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99903354
Orbit inclination i 88.18635193°
Perihelion distance q 0.49358369 AU
73,839,069 km
Aphelion distance Q 1,020.93222961 AU
152,729,287,985 km
Semi-major axis a 510.71290665 AU
76,401,563,527 km
Orbital period period 11,541.8000 years
4,215,641.5563 days
Date of perihelion transit Tp 2017-Apr-23 07:31:11
2,457,866.8133 JD
Next perihelion transit 13559-May-06 20:52
6,673,508.3697 JD
Argument of perihelion peri 87.241012833508°
Longitude of the ascending node node 223.17256387506°
Mean anomaly M 359.99800912927°
Mean motion n 0.00008540°/day
Closest approach to Earth* 2017-Mar-31
Distance of closest approach* 0.60601619 AU
90,658,732 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.