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C/2024 Q3 (PANSTARRS)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion5 Mar 202520.22.092 AU2.550 AU 20h03m+21°52'52.0°22.0°297°
Nearest approach7 May 202519.82.221 AU1.889 AU 17h52m+60°17'95.2°26.9°222°
Today19 Apr 202625.04.843 AU4.207 AU 10h40m+21°10'124.2°9.9°121°
C/2024 Q3 (PANSTARRS)- 2026-04-19
astro.vanbuitenen.nl


 
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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. (15.0 + 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 Q3 (PANSTARRS) are: 

    e (Eccentricity)                : 1.0012730
    q (Perihelion distance)         : 2.0919270
    i (Inclination)                 : 121.37950
    Ω (Longitude of ascending node) : 337.28790
    ω (Argument of perihelion)      : 70.13250
    L (Longitude of perihelion)     : 282.04742
    B (Latitude of perihelion)      : 53.41020
    T (Time of perihelion passage)  : 2460739.68360

    Epoch                           : 2026 Apr 18
    Reference                       : MPEC 2026-E44

    Classification(s):              : Nearly isotropic; New (a > 10000 AU)

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-04-18 00:00 UT   10 41 48.5   +21 14 16     4.182    4.833  125.4    9.8   121   24.9 
2026-04-19 00:00 UT   10 40 55.5   +21 11 04     4.204    4.842  124.3    9.9   121   25.0 
2026-04-19 02:24 UT   10 40 50.3   +21 10 45     4.207    4.843  124.2    9.9   121   25.0 
2026-04-20 00:00 UT   10 40 03.9   +21 07 48     4.227    4.850  123.2   10.0   120   25.0 
2026-04-21 00:00 UT   10 39 13.5   +21 04 27     4.249    4.858  122.1   10.1   120   25.0 
2026-04-22 00:00 UT   10 38 24.5   +21 01 01     4.272    4.867  121.0   10.2   119   25.0 
2026-04-23 00:00 UT   10 37 36.8   +20 57 30     4.295    4.875  119.9   10.3   119   25.0 
2026-04-24 00:00 UT   10 36 50.3   +20 53 55     4.318    4.883  118.8   10.4   119   25.1 
2026-04-25 00:00 UT   10 36 05.2   +20 50 16     4.341    4.892  117.8   10.5   118   25.1 
2026-04-26 00:00 UT   10 35 21.4   +20 46 32     4.365    4.900  116.7   10.6   118   25.1 
2026-04-27 00:00 UT   10 34 38.8   +20 42 45     4.388    4.908  115.6   10.7   117   25.1 
2026-04-28 00:00 UT   10 33 57.5   +20 38 54     4.412    4.917  114.6   10.7   117   25.1 
2026-04-29 00:00 UT   10 33 17.4   +20 34 59     4.436    4.925  113.5   10.8   117   25.2 




    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.

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