P/2025 D3 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	25 Jul 2024	22.4	2.966 AU	3.972 AU	08h10m	+13°22'	6.6°	2.3°	202°
Nearest approach	4 Mar 2025	21.4	3.158 AU	2.172 AU	11h11m	+00°03'	172.8°	2.3°	334°
Today	12 Aug 2025	23.2	3.472 AU	4.138 AU	12h14m	-00°15'	43.3°	11.6°	112°

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 P/2025 D3 (PANSTARRS) are:

            e (Eccentricity)                : 0.2524580
            q (Perihelion distance)         : 2.9656460
            i (Inclination)                 : 9.64380
            Ω (Longitude of ascending node) : 186.63590
            ω (Argument of perihelion)      : 294.48260
            L (Longitude of perihelion)     : 121.42749
            B (Latitude of perihelion)      : -8.76952
            T (Time of perihelion passage)  : 2460517.29220
            P (Orbital period in years)     : 7.90

            Epoch                           : 2025 Aug 12
            Reference                       : MPEC 2025-OF9

            Classification(s):              : Ecliptic; Jupiter family; Quasi-Hilda
            Tisserand (Jupiter)             : 2.977
        

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 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. (14.70 + 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
2025-08-12 00:00 UT   12 13 15.3   +00 10 14     4.128    3.470   43.9   11.7   112   23.2 
2025-08-12 21:04 UT   12 14 16.0   +00 15 42     4.138    3.472   43.3   11.6   112   23.2 
2025-08-13 00:00 UT   12 14 24.5   +00 16 28     4.140    3.472   43.3   11.5   112   23.2 
2025-08-14 00:00 UT   12 15 33.9   +00 22 42     4.151    3.474   42.6   11.4   112   23.2 
2025-08-15 00:00 UT   12 16 43.5   +00 28 58     4.163    3.476   42.0   11.2   112   23.2 
2025-08-16 00:00 UT   12 17 53.2   +00 35 16     4.174    3.479   41.3   11.1   112   23.2 
2025-08-17 00:00 UT   12 19 03.2   +00 41 35     4.186    3.481   40.7   10.9   112   23.2 
2025-08-18 00:00 UT   12 20 13.4   +00 47 55     4.197    3.483   40.0   10.8   112   23.2 
2025-08-19 00:00 UT   12 21 23.8   +00 54 16     4.208    3.485   39.4   10.6   112   23.2 
2025-08-20 00:00 UT   12 22 34.3   -01 00 39     4.219    3.487   38.7   10.5   112   23.3 
2025-08-21 00:00 UT   12 23 45.0   -01 07 03     4.230    3.489   38.1   10.3   112   23.3 
2025-08-22 00:00 UT   12 24 55.9   -01 13 28     4.241    3.492   37.4   10.1   112   23.3 

    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.