67P/Churyumov-Gerasimenko
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Today	2 Oct 2025	20.7	5.512 AU	6.073 AU	15h55m	-22°20'	51.9°	8.2°	103°
Nearest approach	16 Aug 2027	15.1	2.747 AU	1.828 AU	19h43m	-27°12'	149.2°	10.9°	70°
Perihelion	9 Apr 2028	11.8	1.211 AU	2.087 AU	02h32m	+15°54'	21.4°	17.6°	70°

The interactive orbit chart above shows the comet's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of 67P/Churyumov-Gerasimenko are:

            e (Eccentricity)                : 0.6497760
            q (Perihelion distance)         : 1.2113050
            i (Inclination)                 : 3.86780
            Ω (Longitude of ascending node) : 36.30870
            ω (Argument of perihelion)      : 22.22110
            L (Longitude of perihelion)     : 58.48410
            B (Latitude of perihelion)      : 1.46178
            T (Time of perihelion passage)  : 2461870.72840
            P (Orbital period in years)     : 6.43

            Epoch                           : 2025 Oct 01
            Reference                       : MPEC 2024-C04

            Classification(s):              : Ecliptic; Jupiter family
            Tisserand (Jupiter)             : 2.741
        

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (11.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 9.37 + 5 log[∆] + 10.00 log[r]).

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.

The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
A more printer-friendly version of the same chart can be found further down this page as well.

The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.

A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-10-02 00:00 UT   15 55 02.6   -22 18 53     6.063    5.513   52.6    8.3   103   20.7 
2025-10-02 20:35 UT   15 55 33.3   -22 20 17     6.073    5.512   51.9    8.2   103   20.7 
2025-10-03 00:00 UT   15 55 38.4   -22 20 31     6.074    5.512   51.8    8.2   103   20.7 
2025-10-04 00:00 UT   15 56 14.6   -22 22 10     6.085    5.510   50.9    8.1   103   20.7 
2025-10-05 00:00 UT   15 56 51.3   -22 23 50     6.096    5.509   50.1    8.0   103   20.7 
2025-10-06 00:00 UT   15 57 28.4   -22 25 31     6.107    5.507   49.3    7.9   103   20.7 
2025-10-07 00:00 UT   15 58 05.9   -22 27 12     6.118    5.505   48.4    7.8   103   20.7 
2025-10-08 00:00 UT   15 58 43.8   -22 28 55     6.128    5.504   47.6    7.7   103   20.7 
2025-10-09 00:00 UT   15 59 22.0   -22 30 38     6.138    5.502   46.8    7.6   103   20.7 
2025-10-10 00:00 UT   16 00 00.7   -22 32 22     6.149    5.501   45.9    7.5   103   20.7 
2025-10-11 00:00 UT   16 00 39.8   -22 34 06     6.158    5.499   45.1    7.4   103   20.7 
2025-10-12 00:00 UT   16 01 19.3   -22 35 52     6.168    5.498   44.3    7.3   103   20.7 

    Terminology:
            
    delta:  distance between comet and earth in AU
    radius: distance between comet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-comet)    
    phase:  phase angle in degrees (angle sun-comet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km      
    

Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet Center)
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.