Comet 201P/LONEOS
Comet 201P/LONEOS is in the constellation of
Ophiuchus,
at a distance of
Finder Charts
View interactive star map
High precision deep sky finder chart, 60 arcmin wide, showing where Comet 201P/LONEOS is right now. Click on the image to see a more detailed fullscreen tracker view.


Also check out Where is Comet 201P/LONEOS?, a page that provides all the information needed to find Comet 201P/LONEOS in the sky and additional links to sky charts.
Celestial Coordinates
Apparent
J2000
Additional Information
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 201P/LONEOS from Greenwich, UK (all times relative to the local timezone Europe/London):
- 201P/LONEOS is below the horizon from Greenwich, UK.
- Given its current magnitude, 201P/LONEOS 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 201P/LONEOS from Earth is currently
The following chart shows the distance of Comet 201P/LONEOS 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 201P/LONEOS 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 201P/LONEOS to Earth happens on Tue Nov 26 2097 at a distance of 0.367929 Astronomical Units, or 55,041,372 kilometers:
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 201P/LONEOS, 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.
Orbital Elements
The following table lists the orbital elements of Comet 201P/LONEOS at epoch 07 May 2012 00:00 UTC (JD: 2456055.5). Source: JPL Small-Body Database
Element | Symbol | Value |
---|---|---|
Orbit eccentricity | e | 0.61286098 |
Orbit inclination | i | 7.03651944° |
Perihelion distance | q | 1.33998367 AU 200,458,704 km |
Aphelion distance | Q |
5.58250985 AU 835,131,588 km |
Semi-major axis | a |
3.46124676 AU 517,795,146 km |
Orbital period | period |
6.4396 years 2,352.0539 days |
Date of perihelion transit | Tp | 2015-Jan-14 08:01:42 2,457,036.8345 JD |
Next perihelion transit | 2021-Jun-23 09:19 2,459,388.8884 JD |
|
Argument of perihelion | peri | 24.953960253678° |
Longitude of the ascending node | node | 35.285667774203° |
Mean anomaly | M | 209.79917906889° |
Mean motion | n | 0.15305772°/day |
Orbit Visualization
View Comet 201P/LONEOS in the 3D Solar System Simulator
15 Days Ephemeris
The following table lists the ephemerides of Comet 201P/LONEOS 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 Jan 30 | 17h 15m 31s | -27° 08’ 05” | 27.95 | Ophiuchus |
2025 Jan 31 | 17h 16m 12s | -27° 09’ 29” | 27.95 | Ophiuchus |
2025 Feb 01 | 17h 16m 54s | -27° 10’ 51” | 27.94 | Ophiuchus |
2025 Feb 02 | 17h 17m 34s | -27° 12’ 14” | 27.93 | Ophiuchus |
2025 Feb 03 | 17h 18m 14s | -27° 13’ 35” | 27.93 | Ophiuchus |
2025 Feb 04 | 17h 18m 53s | -27° 14’ 57” | 27.92 | Ophiuchus |
2025 Feb 05 | 17h 19m 32s | -27° 16’ 18” | 27.91 | Ophiuchus |
2025 Feb 06 | 17h 20m 11s | -27° 17’ 38” | 27.90 | Ophiuchus |
2025 Feb 07 | 17h 20m 49s | -27° 18’ 58” | 27.90 | Ophiuchus |
2025 Feb 08 | 17h 21m 26s | -27° 20’ 18” | 27.89 | Ophiuchus |
2025 Feb 09 | 17h 22m 04s | -27° 21’ 37” | 27.88 | Ophiuchus |
2025 Feb 10 | 17h 22m 40s | -27° 22’ 56” | 27.87 | Ophiuchus |
2025 Feb 11 | 17h 23m 16s | -27° 24’ 15” | 27.87 | Ophiuchus |
2025 Feb 12 | 17h 23m 52s | -27° 25’ 32” | 27.86 | Ophiuchus |
Additional Resources
- Position and finder charts (see also Where is Comet 201P/LONEOS?)
- Distance from Earth (see also How far is Comet 201P/LONEOS from Earth?)
- When does Comet 201P/LONEOS rise and set?
- Brightness (see also How bright is Comet 201P/LONEOS?)
- Orbital elements. Detailed information about Comet 201P/LONEOS orbital parameters.
- Interactive orbit visualization. 3d visualization showing the orbit of Comet 201P/LONEOS with respect to the major Solar System objects.
- 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet 201P/LONEOS for the past and next 7 days.
- Interactive sky chart. An online planetarium application that shows where to locate Comet 201P/LONEOS in the sky from your location.
- Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet 201P/LONEOS with your telescope or on your astrophotographies.