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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 January, 23 2018
High Precision Live Sky Chart
05h 42m 08s
+29° 10’ 53”
 = 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: 60.8°
Max altitude: 67.7°
Azimuth: 299.2°

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 Jan 16 19.25 05h 45m 42s +29° 12’ 29” Auriga
2018 Jan 17 19.25 05h 45m 10s +29° 12’ 20” Auriga
2018 Jan 18 19.26 05h 44m 38s +29° 12’ 09” Auriga
2018 Jan 19 19.26 05h 44m 07s +29° 11’ 56” Auriga
2018 Jan 20 19.27 05h 43m 36s +29° 11’ 42” Auriga
2018 Jan 21 19.27 05h 43m 05s +29° 11’ 26” Auriga
2018 Jan 22 19.28 05h 42m 38s +29° 11’ 11” Auriga
2018 Jan 23 19.28 05h 42m 08s +29° 10’ 53” Auriga
2018 Jan 24 19.29 05h 41m 42s +29° 10’ 33” Auriga
2018 Jan 25 19.29 05h 41m 14s +29° 10’ 13” Auriga
2018 Jan 26 19.30 05h 40m 50s +29° 09’ 51” Auriga
2018 Jan 27 19.30 05h 40m 24s +29° 09’ 29” Auriga
2018 Jan 28 19.31 05h 40m 00s +29° 09’ 06” Auriga
2018 Jan 29 19.32 05h 39m 38s +29° 08’ 43” 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 02 December 2009 00:00 UTC (JD: 2455168.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.25515086
Orbit inclination i 8.70169331°
Perihelion distance q 3.04426994 AU
455,416,302 km
Aphelion distance Q 5.12992209 AU
767,425,422 km
Semi-major axis a 4.08709601 AU
611,420,862 km
Orbital period period 8.2600 years
3,018.0101 days
Date of perihelion transit Tp 2005-Dec-20 20:27:39
2,453,725.3525 JD
Next perihelion transit 2014-Mar-26 20:42
2,456,743.3626 JD
Argument of perihelion peri 223.0226727343°
Longitude of the ascending node node 58.930116675442°
Mean anomaly M 172.14425047233°
Mean motion n 0.11928390°/day
Closest approach to Earth* 2022-Jul-03
Distance of closest approach* 2.03085668 AU
303,811,835 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.