The Solar System at your Fingertips
Comets » 

Comet 17P/Holmes

Available Resources

Comet 17P/Holmes Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 17P/Holmes 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 17P/Holmes in Corvus on January, 24 2018
High Precision Live Sky Chart
12h 14m 35s
-14° 05’ 48”
 = 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 17P/Holmes Rise and Set Times

Today's Comet 17P/Holmes rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 104.1°
Max altitude: 24.4°
Azimuth: 255.9°

Comet 17P/Holmes Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 17P/Holmes with respect of the Sun and the orbits of the major planets. The position of Comet 17P/Holmes 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 17P/Holmes
View Comet 17P/Holmes in the 3D Solar System Simulator

Comet 17P/Holmes Ephemeris

The following table lists the ephemerides of Comet 17P/Holmes computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 17P/Holmes in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Jan 17 20.48 12h 15m 25s -13° 45’ 33” Corvus
2018 Jan 18 20.47 12h 15m 20s -13° 48’ 42” Corvus
2018 Jan 19 20.47 12h 15m 15s -13° 51’ 45” Corvus
2018 Jan 20 20.46 12h 15m 08s -13° 54’ 42” Corvus
2018 Jan 21 20.45 12h 15m 02s -13° 57’ 37” Corvus
2018 Jan 22 20.44 12h 14m 53s -14° 00’ 24” Corvus
2018 Jan 23 20.44 12h 14m 44s -14° 03’ 09” Corvus
2018 Jan 24 20.43 12h 14m 35s -14° 05’ 48” Corvus
2018 Jan 25 20.42 12h 14m 25s -14° 08’ 21” Corvus
2018 Jan 26 20.41 12h 14m 13s -14° 10’ 50” Corvus
2018 Jan 27 20.41 12h 14m 00s -14° 13’ 14” Corvus
2018 Jan 28 20.40 12h 13m 49s -14° 15’ 33” Corvus
2018 Jan 29 20.39 12h 13m 35s -14° 17’ 48” Corvus
2018 Jan 30 20.38 12h 13m 19s -14° 19’ 55” Corvus

Distance of Comet 17P/Holmes from Earth

The following chart shows the distance of Comet 17P/Holmes 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 17P/Holmes is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 17P/Holmes from Earth between January 2013 and December 2075

Light Curve of Comet 17P/Holmes

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 17P/Holmes, 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 17P/Holmes between January 2013 and December 2075

Comet 17P/Holmes Orbital Elements

The following table lists the orbital elements of Comet 17P/Holmes at epoch 16 January 2010 00:00 UTC (JD: 2455213.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.43287584
Orbit inclination i 19.11426464°
Perihelion distance q 2.05337899 AU
307,181,125 km
Aphelion distance Q 5.18799469 AU
776,112,960 km
Semi-major axis a 3.62068684 AU
541,647,043 km
Orbital period period 6.8900 years
2,516.4301 days
Date of perihelion transit Tp 2007-May-05 00:40:56
2,454,225.5284 JD
Next perihelion transit 2014-Mar-25 11:00
2,456,741.9585 JD
Argument of perihelion peri 24.351852593229°
Longitude of the ascending node node 326.85321508915°
Mean anomaly M 141.33902074188°
Mean motion n 0.14305981°/day
Closest approach to Earth* 2048-Aug-20
Distance of closest approach* 1.14829316 AU
171,782,212 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.