Comet 27P/Crommelin
Comet 27P/Crommelin is in the constellation of
Serpens,
at a distance of
Finder Charts
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High precision deep sky finder chart, 60 arcmin wide, showing where Comet 27P/Crommelin is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Comet 27P/Crommelin?, a page that provides all the information needed to find Comet 27P/Crommelin 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 27P/Crommelin from Greenwich, UK (all times relative to the local timezone Europe/London):
- 27P/Crommelin is below the horizon from Greenwich, UK.
- Given its current magnitude, 27P/Crommelin is visible only through long exposure photography.
- Go to interactive sky chart
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Distance from Earth
The distance of Comet 27P/Crommelin from Earth is currently
The following chart shows the distance of Comet 27P/Crommelin 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 27P/Crommelin 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 27P/Crommelin to Earth happens on Wed Jul 20 2011 at a distance of 1.585955 Astronomical Units, or 237,255,518 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 27P/Crommelin, 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 27P/Crommelin at epoch 02 August 2002 00:00 UTC (JD: 2452489.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 0.91925987 |
| Orbit inclination | i | 29.22111461° |
| Perihelion distance | q | 0.73421009 AU 109,836,266 km |
| Aphelion distance | Q |
17.45278379 AU 2,610,899,298 km |
| Semi-major axis | a |
9.09349694 AU 1,360,367,782 km |
| Orbital period | period |
27.4223 years 10,016.0115 days |
| Date of perihelion transit | Tp | 2011-Aug-02 13:37:41 2,455,776.0678 JD |
| Next perihelion transit | 2039-Jan-03 13:54 2,465,792.0793 JD |
|
| Argument of perihelion | peri | 195.95544535372° |
| Longitude of the ascending node | node | 250.95935274773° |
| Mean anomaly | M | 241.87269707634° |
| Mean motion | n | 0.03594245°/day |
View Comet 27P/Crommelin in the 3D Solar System Simulator
15 Days Ephemeris
The following table lists the ephemerides of Comet 27P/Crommelin 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 Jun 06 | 17h 41m 17s | -15° 14’ 02” | 53.38 | Serpens |
| 2025 Jun 07 | 17h 41m 03s | -15° 13’ 44” | 53.38 | Serpens |
| 2025 Jun 08 | 17h 40m 50s | -15° 13’ 26” | 53.38 | Serpens |
| 2025 Jun 09 | 17h 40m 36s | -15° 13’ 09” | 53.38 | Serpens |
| 2025 Jun 10 | 17h 40m 23s | -15° 12’ 51” | 53.38 | Serpens |
| 2025 Jun 11 | 17h 40m 09s | -15° 12’ 35” | 53.38 | Serpens |
| 2025 Jun 12 | 17h 39m 56s | -15° 12’ 18” | 53.38 | Serpens |
| 2025 Jun 13 | 17h 39m 42s | -15° 12’ 03” | 53.38 | Serpens |
| 2025 Jun 14 | 17h 39m 29s | -15° 11’ 47” | 53.38 | Serpens |
| 2025 Jun 15 | 17h 39m 15s | -15° 11’ 33” | 53.38 | Serpens |
| 2025 Jun 16 | 17h 39m 01s | -15° 11’ 18” | 53.38 | Serpens |
| 2025 Jun 17 | 17h 38m 48s | -15° 11’ 05” | 53.38 | Serpens |
| 2025 Jun 18 | 17h 38m 34s | -15° 10’ 51” | 53.38 | Serpens |
| 2025 Jun 19 | 17h 38m 20s | -15° 10’ 38” | 53.38 | Serpens |
Additional Resources on TheSkyLive
- Comet 27P/Crommelin: Complete reference information on TheSkyLive.com.
- Where is Comet 27P/Crommelin?: Key information on locating Comet 27P/Crommelin in the sky.
- Distance from Earth: Find out how far Comet 27P/Crommelin is from Earth right now.
- How Bright is Comet 27P/Crommelin?: Current visual brightness (magnitude) and apparent size.
- Rise and Set Times: Comet 27P/Crommelin's rise and set times from your location.
- Interactive Sky Map: planetarium-style interactive visualization of Comet 27P/Crommelin's position in the sky.
- Live Position Tracker: high precision position tracker with deep space imagery.
- Ephemeris: 15 days Comet 27P/Crommelin's computed ephemeris.
- Orbital elements: information about Comet 27P/Crommelin orbital parameters.
- Orbit Visualization. 3d interactive visualization showing the orbit of Comet 27P/Crommelin with respect to the major Solar System objects.