We use cookies to deliver essential features and to measure their performance. Learn more.
Help us keep TheSkyLive 100% free & ads-free, donate now!
Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:19 
Transit: 12:14 
Sunset: 17:09
sleep   (Nighttime)  
What's Visible Now • Tonight Timeline
Search  close
Comets » 

Comet C/2024 B1 (Lemmon)

Below the horizon.  Rise: 1:07 | Tran: 8:25 | Set: 15:44
Alt: -10.18°   Az: 49.02°   Direction: North-East

Comet C/2024 B1 (Lemmon) is in the constellation of Hercules, at a distance of 388,072,089.0 kilometers from Earth. The current Right Ascension is 17h 56m 45s and the Declination is +15° 17’ 45” (apparent coordinates). The predicted magnitude of Comet C/2024 B1 (Lemmon) is 17.62 (data provided by JPL Horizons).

Finder Charts

Map showing Comet C/2024 B1 (Lemmon) in Hercules on February, 12 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Comet C/2024 B1 (Lemmon) in Hercules on February, 12 2025. Field of view: 15x9 degrees. View in interactive sky chart

High precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2024 B1 (Lemmon) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2024 B1 (Lemmon)
RA: 17h 55m 37s
Dec: +15° 17’ 53”
Deep sky finder chart for Comet C/2024 B1 (Lemmon). Field of view: 60x40 arcmins. View in deep sky object tracker

Also check out Where is Comet C/2024 B1 (Lemmon)?, a page that provides all the information needed to find Comet C/2024 B1 (Lemmon) in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

17h 56m 45s
+15° 17’ 45”
15h 21m 31s
09h 18m 17s

J2000

17h 55m 37s
+15° 17’ 53”

Additional Information

Hercules
n/a
n/a
n/a
n/a
17.62

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.

Rise and Set Times

Today's rise, transit and set times of Comet C/2024 B1 (Lemmon) from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 74.6°
Max altitude: 53.9°
Azimuth: 285.3°
  • C/2024 B1 (Lemmon) is below the horizon from Greenwich, UK.
  • Given its current magnitude, C/2024 B1 (Lemmon) is visible only through long exposure photography.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Distance from Earth

The distance of Comet C/2024 B1 (Lemmon) from Earth is currently 388,072,089.0 kilometers, equivalent to 2.5941016886 Astronomical Units. Light takes 21m 34.469s to travel from Comet C/2024 B1 (Lemmon) and arrive to us.

388,072,089.0
2.5941016886
21m 34.469s

The following chart shows the distance of Comet C/2024 B1 (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.

Chart of the distance of Comet C/2024 B1 (Lemmon) from Earth in Astronomical Units (au)

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/2024 B1 (Lemmon) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach

Between 1 January 2000 and 31 December 2099, the closest approach of Comet C/2024 B1 (Lemmon) to Earth happens on Tue Oct 15 2024 at a distance of 1.988227 Astronomical Units, or 297,434,582 kilometers:

Tue Oct 15 2024
297,434,582
1.988227

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

Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2024 B1 (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.

Chart of the magnitude of Comet C/2024 B1 (Lemmon) as a function of time

Orbital Elements

The following table lists the orbital elements of Comet C/2024 B1 (Lemmon) at epoch 28 December 2023 00:00 UTC (JD: 2460307.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00102584
Orbit inclination i 70.88192176°
Perihelion distance q 1.63321843 AU
244,326,000 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2024-Oct-07 16:51:03
2,460,591.2021 JD
Argument of perihelion peri 66.22067742265°
Longitude of the ascending node node 79.195561535476°
Mean anomaly M -0.0044016914812755°
Mean motion n 0.00001552°/day

Orbit Visualization

Orbit Diagram of Comet C/2024 B1 (Lemmon)
View Comet C/2024 B1 (Lemmon) in the 3D Solar System Simulator

15 Days Ephemeris

The following table lists the ephemerides of Comet C/2024 B1 (Lemmon) computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2025 Feb 05 17h 50m 03s +15° 52’ 05” 17.44 Hercules
2025 Feb 06 17h 50m 58s +15° 47’ 18” 17.46 Hercules
2025 Feb 07 17h 51m 51s +15° 42’ 40” 17.48 Hercules
2025 Feb 08 17h 52m 43s +15° 38’ 10” 17.51 Hercules
2025 Feb 09 17h 53m 35s +15° 33’ 49” 17.53 Hercules
2025 Feb 10 17h 54m 25s +15° 29’ 36” 17.55 Hercules
2025 Feb 11 17h 55m 13s +15° 25’ 31” 17.58 Hercules
2025 Feb 12 17h 56m 01s +15° 21’ 33” 17.60 Hercules
2025 Feb 13 17h 56m 46s +15° 17’ 42” 17.62 Hercules
2025 Feb 14 17h 57m 31s +15° 14’ 00” 17.64 Hercules
2025 Feb 15 17h 58m 14s +15° 10’ 23” 17.67 Hercules
2025 Feb 16 17h 58m 57s +15° 06’ 55” 17.69 Hercules
2025 Feb 17 17h 59m 37s +15° 03’ 34” 17.71 Hercules
2025 Feb 18 18h 00m 17s +15° 00’ 18” 17.73 Hercules

Additional Resources