Comet 123P/West-Hartley

Available Resources

• Position (see also Where is Comet 123P/West-Hartley?)
• Distance (see also How far is Comet 123P/West-Hartley from Earth?)
• Rise and set times (see also When does Comet 123P/West-Hartley rise and set?)
• Brightness (see also How bright is Comet 123P/West-Hartley?)
• Orbital elements. Detailed information about Comet 123P/West-Hartley orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Comet 123P/West-Hartley with respect to the major Solar System objects.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet 123P/West-Hartley for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Comet 123P/West-Hartley in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet 123P/West-Hartley with your telescope or on your astrophotographies.

Closest approach of Comet 123P/West-Hartley to Earth

Between January 2013 and December 2100 the closest approach of Comet 123P/West-Hartley to Earth happens on Tue Jan 1 2013 at a distance of 0.00000000 Astronomical Units, or 0 kilometers:

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet 123P/West-Hartley brightness

The current visual magnitude of Comet 123P/West-Hartley is -100.00.

The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behavior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated 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.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 123P/West-Hartley, 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.

Comet 123P/West-Hartley rise and set times

Today's Comet 123P/West-Hartley rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

The rise and set times are defined as the time at which the upper limb of Comet 123P/West-Hartley touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Visualization of Comet 123P/West-Hartley Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 123P/West-Hartley with respect of the Sun and the orbits of the major planets. The position of Comet 123P/West-Hartley 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!

Comet 123P/West-Hartley 15 Days Ephemeris

The following table lists the ephemerides of Comet 123P/West-Hartley computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 123P/West-Hartley in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2020 Jan 20	17h 02m 39s	-27° 03’ 06”	N.A.
2020 Jan 21	17h 04m 00s	-27° 07’ 39”	N.A.
2020 Jan 22	17h 05m 21s	-27° 12’ 09”	N.A.
2020 Jan 23	17h 06m 42s	-27° 16’ 36”	N.A.
2020 Jan 24	17h 08m 02s	-27° 21’ 02”	N.A.
2020 Jan 25	17h 09m 20s	-27° 25’ 26”	N.A.
2020 Jan 26	17h 10m 40s	-27° 29’ 47”	N.A.
2020 Jan 27	17h 11m 57s	-27° 34’ 05”	N.A.
2020 Jan 28	17h 13m 15s	-27° 38’ 24”	N.A.
2020 Jan 29	17h 14m 32s	-27° 42’ 38”	N.A.
2020 Jan 30	17h 15m 50s	-27° 46’ 53”	N.A.
2020 Jan 31	17h 17m 06s	-27° 51’ 05”	N.A.
2020 Feb 01	17h 18m 21s	-27° 55’ 14”	N.A.
2020 Feb 02	17h 19m 36s	-27° 59’ 22”	N.A.