P/2025 D3 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	26 Jul 2024	22.4	2.967 AU	3.973 AU	08h10m	+13°20'	6.7°	2.3°	204°
Nearest approach	4 Mar 2025	21.4	3.159 AU	2.173 AU	11h11m	+00°04'	172.8°	2.2°	334°
Today	23 May 2026	23.3	4.099 AU	3.115 AU	15h17m	-08°43'	164.1°	3.9°	140°

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. (14.7 + 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 P/2025 D3 (PANSTARRS) are:

    e (Eccentricity)                : 0.2524580
    q (Perihelion distance)         : 2.9668480
    i (Inclination)                 : 9.64200
    Ω (Longitude of ascending node) : 186.63000
    ω (Argument of perihelion)      : 294.57810
    L (Longitude of perihelion)     : 121.51786
    B (Latitude of perihelion)      : -8.76116
    T (Time of perihelion passage)  : 2460517.65010
    P (Orbital period in years)     : 7.91

    Epoch                           : 2026 May 23
    Reference                       : MPC194194

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-05-22 00:00 UT   15 18 31.9   -08 48 23     3.106    4.095  165.7    3.5   144   23.3 
2026-05-23 00:00 UT   15 17 55.4   -08 45 28     3.111    4.097  164.9    3.7   142   23.3 
2026-05-23 19:40 UT   15 17 25.7   -08 43 08     3.115    4.099  164.1    3.9   140   23.3 
2026-05-24 00:00 UT   15 17 19.2   -08 42 37     3.116    4.099  164.0    3.9   139   23.3 
2026-05-25 00:00 UT   15 16 43.5   -08 39 51     3.122    4.101  163.0    4.1   137   23.3 
2026-05-26 00:00 UT   15 16 08.1   -08 37 09     3.128    4.103  162.1    4.4   135   23.3 
2026-05-27 00:00 UT   15 15 33.1   -08 34 31     3.134    4.105  161.1    4.6   134   23.3 
2026-05-28 00:00 UT   15 14 58.6   -08 31 58     3.140    4.107  160.1    4.8   132   23.3 
2026-05-29 00:00 UT   15 14 24.5   -08 29 30     3.147    4.109  159.2    5.0   131   23.3 
2026-05-30 00:00 UT   15 13 51.0   -08 27 06     3.153    4.112  158.2    5.3   129   23.3 
2026-05-31 00:00 UT   15 13 17.9   -08 24 48     3.160    4.114  157.2    5.5   128   23.3 
2026-06-01 00:00 UT   15 12 45.4   -08 22 34     3.168    4.116  156.2    5.7   127   23.3 
2026-06-02 00:00 UT   15 12 13.5   -08 20 25     3.176    4.118  155.1    5.9   126   23.4 

    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.