Comet C/2023 H2 (Lemmon)

Comet C/2023 H2 (Lemmon) is currently in the constellation of Grus.

The current Right Ascension of Comet C/2023 H2 (Lemmon) is 22h 15m 38s and the Declination is -37° 24’ 34” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current estimated magnitude of Comet C/2023 H2 (Lemmon) is 9.88 (JPL) while the latest observed magnitude is 8.6 (COBS).

The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted 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.

Today's rise, transit and set times of Comet C/2023 H2 (Lemmon) from Greenwich, United Kingdom edit_location_alt (all times relative to the local timezone Europe/London):

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Available Resources

• Position and finder charts (see also Where is Comet C/2023 H2 (Lemmon)?)
• Distance from Earth (see also How far is Comet C/2023 H2 (Lemmon) from Earth?)
• When does Comet C/2023 H2 (Lemmon) rise and set?
• Brightness (see also How bright is Comet C/2023 H2 (Lemmon)?)
• Orbital elements. Detailed information about Comet C/2023 H2 (Lemmon) orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Comet C/2023 H2 (Lemmon) with respect to the major Solar System objects.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet C/2023 H2 (Lemmon) for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Comet C/2023 H2 (Lemmon) in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet C/2023 H2 (Lemmon) with your telescope or on your astrophotographies.

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2023 H2 (Lemmon) is right now. Click on the image to see a more detailed fullscreen tracker view.

Also check out Where is Comet C/2023 H2 (Lemmon)?, a page that provides all the information needed to find Comet C/2023 H2 (Lemmon) in the sky and additional links to sky charts.

Comet C/2023 H2 (Lemmon) Distance from Earth

The distance of Comet C/2023 H2 (Lemmon) from Earth is currently 109,492,735 kilometers, equivalent to 0.731914 Astronomical Units. Light takes 6 minutes and 5.2285 seconds to travel from Comet C/2023 H2 (Lemmon) and arrive to us.

The following chart shows the distance of Comet C/2023 H2 (Lemmon) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2023 H2 (Lemmon) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Comet C/2023 H2 (Lemmon) to Earth

Between 1 January 2000 and 31 December 2099, the closest approach of Comet C/2023 H2 (Lemmon) to Earth happens on Sat Nov 11 2023 at a distance of 0.193016 Astronomical Units, or 28,874,757 kilometers:

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

Comet C/2023 H2 (Lemmon) Brightness and Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2023 H2 (Lemmon), 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.

Visualization of Comet C/2023 H2 (Lemmon) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2023 H2 (Lemmon) with respect of the Sun and the orbits of the major planets. The position of Comet C/2023 H2 (Lemmon) 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 C/2023 H2 (Lemmon) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2023 H2 (Lemmon) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2023 H2 (Lemmon) in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2023 Nov 23	21h 41m 44s	-31° 28’ 15”	8.37	Pisces Austrinus
2023 Nov 24	21h 47m 34s	-32° 36’ 20”	8.58	Pisces Austrinus
2023 Nov 25	21h 52m 49s	-33° 35’ 18”	8.79	Pisces Austrinus
2023 Nov 26	21h 57m 34s	-34° 26’ 47”	8.99	Pisces Austrinus
2023 Nov 27	22h 01m 54s	-35° 12’ 00”	9.18	Pisces Austrinus
2023 Nov 28	22h 05m 53s	-35° 51’ 59”	9.37	Pisces Austrinus
2023 Nov 29	22h 09m 32s	-36° 27’ 32”	9.55	Grus
2023 Nov 30	22h 12m 55s	-36° 59’ 18”	9.73	Grus
2023 Dec 01	22h 16m 02s	-37° 27’ 51”	9.90	Grus
2023 Dec 02	22h 18m 59s	-37° 53’ 35”	10.07	Grus
2023 Dec 03	22h 21m 42s	-38° 16’ 54”	10.24	Grus
2023 Dec 04	22h 24m 18s	-38° 38’ 03”	10.40	Grus
2023 Dec 05	22h 26m 44s	-38° 57’ 21”	10.56	Grus
2023 Dec 06	22h 29m 02s	-39° 15’ 01”	10.72	Grus