C/2024 C3 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	10 Nov 2023	21.5	6.716 AU	7.160 AU	11h28m	+11°08'	59.7°	7.3°	298°
Nearest approach	8 Mar 2024	21.1	6.736 AU	5.746 AU	11h26m	+09°31'	174.6°	0.8°	204°
Today	27 Oct 2026	22.9	8.077 AU	9.031 AU	14h13m	-27°57'	15.5°	1.9°	172°

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.)

Light curve

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS. The light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (9.0 + 5 log[∆] + 10.0 log[r]). An additional green curve is displayed when an increase in apparent brightness is expected due to forward scattering of sunlight, which occurs when a dust-rich comet is located between the Earth and the Sun. (See Marcus 2007)

Charts

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.

Orbital elements

The orbital elements of C/2024 C3 (PANSTARRS) are:

    e (Eccentricity)                : 0.4255380
    q (Perihelion distance)         : 6.7158320
    i (Inclination)                 : 22.44480
    Ω (Longitude of ascending node) : 359.69050
    ω (Argument of perihelion)      : 159.83110
    L (Longitude of perihelion)     : 340.93879
    B (Latitude of perihelion)      : 7.56426
    T (Time of perihelion passage)  : 2460259.26600
    P (Orbital period in years)     : 39.97

    Epoch                           : 2026 Oct 23
    Reference                       : MPC194188

    Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); Halley type (P < 200 years)

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-10-26 00:00 UT   14 12 31.5   -27 53 49     9.026    8.075   15.9    1.9   169   22.8 
2026-10-27 00:00 UT   14 13 08.7   -27 57 25     9.030    8.077   15.5    1.9   172   22.9 
2026-10-27 02:20 UT   14 13 12.3   -27 57 46     9.031    8.077   15.5    1.9   172   22.9 
2026-10-28 00:00 UT   14 13 46.0   -28 01 02     9.034    8.079   15.2    1.8   174   22.9 
2026-10-29 00:00 UT   14 14 23.2   -28 04 39     9.038    8.081   14.8    1.8   177   22.9 
2026-10-30 00:00 UT   14 15 00.5   -28 08 18     9.041    8.084   14.6    1.8   181   22.9 
2026-10-31 00:00 UT   14 15 37.8   -28 11 58     9.044    8.086   14.3    1.7   184   22.9 
2026-11-01 00:00 UT   14 16 15.1   -28 15 38     9.047    8.088   14.1    1.7   187   22.9 
2026-11-02 00:00 UT   14 16 52.5   -28 19 19     9.049    8.090   14.0    1.7   190   22.9 
2026-11-03 00:00 UT   14 17 29.8   -28 23 02     9.052    8.092   13.9    1.7   194   22.9 
2026-11-04 00:00 UT   14 18 07.1   -28 26 45     9.054    8.094   13.8    1.7   197   22.9 
2026-11-05 00:00 UT   14 18 44.5   -28 30 29     9.056    8.096   13.8    1.7   201   22.9 
2026-11-06 00:00 UT   14 19 21.8   -28 34 13     9.057    8.099   13.9    1.7   204   22.9 

    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.