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public  Biancheng, China Biancheng, China  ⓘ
TimezoneAsia/Shanghai
Sunrise: 4:26 
Transit: 11:55 
Sunset: 19:23
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Comets » 

Comet 242P/Spahr

Below the horizon.  Rise: 5:27 | Tran: 11:18 | Set: 17:07
Alt: -51.69°   Az: 349.81°   Direction: North

Comet 242P/Spahr is in the constellation of Orion, at a distance of 739,828,576.0 kilometers from Earth. The current Right Ascension is 06h 18m 06s and the Declination is -02° 47’ 52” (apparent coordinates). The estimated magnitude of comet 242P/Spahr, computed using JPL Horizons's data, is 19.06).

Finder Charts

The sky charts below show, at different resolutions, the position of comet 242P/Spahr in the sky. Click on each chart to access the interactive star map tool.

Star map showing the position of comet 242P/Spahr in the constellation of Orion on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of comet 242P/Spahr in the constellation of Orion on F, d Y. Field of view: 15x9 degrees. View in interactive star map.

The following map uses photographic imagery from the Digitized Sky Survey (DSS) to realistically visualize the precise position of comet 242P/Spahr against the stars in the background. The horizontal size of the map measures 60 arcminutes. Click on the image to access a more detailed full-screen view.

242P/Spahr
RA: 06h 16m 50s
Dec: -02° 47’ 13”
Simplified high-resolution deep sky chart showing the current position of comet 242P/Spahr. Field of view: 60 x 40 arcminutes. Go to the dedicated page

Equatorial Coordinates

Apparent

06h 18m 06s
-02° 47’ 52”
11h 34m 46s
17h 52m 53s

J2000

06h 16m 50s
-02° 47’ 13”

Additional Information

Orion
n/a
n/a
n/a
n/a
19.06

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

The following table lists today's rise, transit and set times of comet 242P/Spahr from Biancheng, China (all times relative to the local timezone Asia/Shanghai):

Azimuth: 92.8°
Max altitude: 46.5°
Azimuth: 267.2°

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 242P/Spahr from Earth is currently 739,828,576.0 kilometers, equivalent to 4.9454485718 Astronomical Units. Light takes 41m 7.802s to travel from comet 242P/Spahr and arrive to us.

739,828,576.0
4.9454485718
41m 7.802s

The following graph shows the distance of comet 242P/Spahr from Earth as a function of time. In the chart the distance is measured in Astronomical Units and the data is sampled with an interval of 1 day.

Chart of the distance of comet 242P/Spahr from Earth in Astronomical Units (au)
Note: The values in this chart may not be entirely accurate around the time of closest approach for objects passing very close to Earth at high speed (e.g., Near-Earth Objects).

The value of the distance of 242P/Spahr from Earth is also available as a real time updated value in the live position tracker.

Closest Approach to Earth

In the period between January 1, 2000 and December 31, 2099, the closest approach of comet 242P/Spahr to Earth will happen on Friday 17 October 2036 at a distance of 3.065836 Astronomical Units, or 458,642,481 kilometers:

Friday 17 October 2036
458,642,481
3.065836

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

Light Curve

The following chart shows the light curve of comet 242P/Spahr, i.e., its apparent magnitude as a function of time. The curve is calculated using the latest ephemerides provided by JPL Horizons. The magnitude data is sampled with the interval of 2 days. Because of this sampling, inaccuracies may occur for objects that have large variations of brightness over a few days. For comets, large discrepancies can arise between the calculated brightness and the observations due to their highly dynamic, and not always precisely predictable, behavior.

Chart of the magnitude of comet 242P/Spahr as a function of time

Orbital Elements

The following table lists the orbital elements of comet 242P/Spahr at epoch September, 30 2010 00:00 UTC (JD: 2455470.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.31060857
Orbit inclination i 32.70387937°
Perihelion distance q 3.91921318 AU
586,305,948 km
Aphelion distance Q 7.45085331 AU
1,114,631,792 km
Semi-major axis a 5.68503324 AU
850,468,870 km
Orbital period period 13.5553 years
4,951.0572 days
Date of perihelion transit Tp March 31, 2012
2,456,018.2130 JD
Next perihelion transit October 20, 2025
2,460,969.2702 JD
Argument of perihelion peri 248.52949968913°
Longitude of the ascending node node 181.02804796066°
Mean anomaly M 320.17483230633°
Mean motion n 0.07271174°/day

Orbit Visualization

The following chart is a 3D animated visualization of the orbit of comet 242P/Spahr relative to the other major objects in the Solar System. You can access more advanced features using our 3D Solar System Viewer.

15 Days Ephemeris

The following table lists the ephemerides of comet 242P/Spahr 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
Jun 27 2025 06h 08m 47s -02° 41’ 17” 19.05 Orion
Jun 28 2025 06h 10m 01s -02° 41’ 53” 19.05 Orion
Jun 29 2025 06h 11m 14s -02° 42’ 33” 19.05 Orion
Jun 30 2025 06h 12m 28s -02° 43’ 19” 19.05 Orion
Jul 01 2025 06h 13m 41s -02° 44’ 10” 19.05 Orion
Jul 02 2025 06h 14m 55s -02° 45’ 04” 19.05 Orion
Jul 03 2025 06h 16m 08s -02° 46’ 05” 19.05 Orion
Jul 04 2025 06h 17m 21s -02° 47’ 10” 19.05 Orion
Jul 05 2025 06h 18m 34s -02° 48’ 20” 19.06 Orion
Jul 06 2025 06h 19m 47s -02° 49’ 34” 19.06 Orion
Jul 07 2025 06h 20m 59s -02° 50’ 53” 19.06 Orion
Jul 08 2025 06h 22m 12s -02° 52’ 18” 19.06 Monoceros
Jul 09 2025 06h 23m 25s -02° 53’ 46” 19.06 Monoceros
Jul 10 2025 06h 24m 37s -02° 55’ 20” 19.06 Monoceros

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