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Comet 117P/Helin-Roman-Alu 1

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Comet 117P/Helin-Roman-Alu 1 Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 117P/Helin-Roman-Alu 1 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 117P/Helin-Roman-Alu 1 in Auriga on April, 19 2018
High Precision Live Sky Chart
05h 56m 03s
+28° 38’ 32”
19.86
 = 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 117P/Helin-Roman-Alu 1 Rise and Set Times

Today's Comet 117P/Helin-Roman-Alu 1 rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 61.4°
Max altitude: 67.2°
Azimuth: 298.6°

Comet 117P/Helin-Roman-Alu 1 Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 117P/Helin-Roman-Alu 1 with respect of the Sun and the orbits of the major planets. The position of Comet 117P/Helin-Roman-Alu 1 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 117P/Helin-Roman-Alu 1
View Comet 117P/Helin-Roman-Alu 1 in the 3D Solar System Simulator

Comet 117P/Helin-Roman-Alu 1 Ephemeris

The following table lists the ephemerides of Comet 117P/Helin-Roman-Alu 1 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 117P/Helin-Roman-Alu 1 in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Apr 12 19.82 05h 51m 28s +28° 40’ 15” Auriga
2018 Apr 13 19.82 05h 52m 05s +28° 40’ 00” Auriga
2018 Apr 14 19.83 05h 52m 44s +28° 39’ 46” Auriga
2018 Apr 15 19.83 05h 53m 22s +28° 39’ 32” Auriga
2018 Apr 16 19.84 05h 54m 02s +28° 39’ 16” Auriga
2018 Apr 17 19.85 05h 54m 42s +28° 39’ 02” Auriga
2018 Apr 18 19.85 05h 55m 23s +28° 38’ 48” Auriga
2018 Apr 19 19.86 05h 56m 03s +28° 38’ 32” Auriga
2018 Apr 20 19.86 05h 56m 44s +28° 38’ 17” Auriga
2018 Apr 21 19.87 05h 57m 26s +28° 38’ 02” Auriga
2018 Apr 22 19.87 05h 58m 09s +28° 37’ 46” Auriga
2018 Apr 23 19.88 05h 58m 53s +28° 37’ 31” Auriga
2018 Apr 24 19.88 05h 59m 35s +28° 37’ 14” Auriga
2018 Apr 25 19.89 06h 00m 20s +28° 36’ 59” Auriga

Distance of Comet 117P/Helin-Roman-Alu 1 from Earth

The following chart shows the distance of Comet 117P/Helin-Roman-Alu 1 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 117P/Helin-Roman-Alu 1 is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 117P/Helin-Roman-Alu 1 from Earth between January 2013 and December 2075

Light Curve of Comet 117P/Helin-Roman-Alu 1

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 117P/Helin-Roman-Alu 1, 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 117P/Helin-Roman-Alu 1 between January 2013 and December 2075

Comet 117P/Helin-Roman-Alu 1 Orbital Elements

The following table lists the orbital elements of Comet 117P/Helin-Roman-Alu 1 at epoch 11 December 2009 00:00 UTC (JD: 2455177.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.25513686
Orbit inclination i 8.70161798°
Perihelion distance q 3.04436241 AU
455,430,134 km
Aphelion distance Q 5.12992418 AU
767,425,735 km
Semi-major axis a 4.08714329 AU
611,427,935 km
Orbital period period 8.2600 years
3,018.0625 days
Date of perihelion transit Tp 2005-Dec-20 20:09:01
2,453,725.3396 JD
Next perihelion transit 2014-Mar-26 21:38
2,456,743.4021 JD
Argument of perihelion peri 223.02406488238°
Longitude of the ascending node node 58.929729076157°
Mean anomaly M 173.21634376093°
Mean motion n 0.11928183°/day
Closest approach to Earth* 2022-Jul-03
Distance of closest approach* 2.03085644 AU
303,811,799 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.