C/2025 K3 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Today	10 Jul 2025	21.6	10.421 AU	10.151 AU	18h47m	+54°48'	102.7°	5.5°	173°
Perihelion	13 Dec 2028	14.6	3.469 AU	3.548 AU	12h04m	-09°16'	77.4°	16.1°	292°
Nearest approach	24 Feb 2029	14.0	3.533 AU	2.665 AU	10h23m	-24°01'	146.5°	8.9°	3°

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 C/2025 K3 (PANSTARRS) are:

            e (Eccentricity)                : 1.0016710
            q (Perihelion distance)         : 3.4688440
            i (Inclination)                 : 104.93350
            Ω (Longitude of ascending node) : 350.62070
            ω (Argument of perihelion)      : 188.59530
            L (Longitude of perihelion)     : 348.39007
            B (Latitude of perihelion)      : -8.30291
            T (Time of perihelion passage)  : 2462119.27140

            Epoch                           : 2025 Jul 09
            Reference                       : MPEC 2025-L43

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

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. (6.40 + 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
2025-07-10 00:00 UT   18 47 20.9   +54 48 25    10.151   10.421  102.7    5.5   173   21.6 
2025-07-10 01:55 UT   18 47 17.0   +54 48 25    10.151   10.421  102.7    5.5   173   21.6 
2025-07-11 00:00 UT   18 46 31.7   +54 48 15    10.144   10.415  102.7    5.5   172   21.6 
2025-07-12 00:00 UT   18 45 42.5   +54 47 58    10.138   10.409  102.7    5.5   171   21.6 
2025-07-13 00:00 UT   18 44 53.4   +54 47 34    10.131   10.403  102.8    5.5   170   21.6 
2025-07-14 00:00 UT   18 44 04.4   +54 47 04    10.125   10.396  102.8    5.5   168   21.6 
2025-07-15 00:00 UT   18 43 15.4   +54 46 26    10.118   10.390  102.8    5.5   167   21.6 
2025-07-16 00:00 UT   18 42 26.6   +54 45 42    10.112   10.384  102.8    5.5   166   21.6 
2025-07-17 00:00 UT   18 41 37.9   +54 44 51    10.106   10.378  102.8    5.5   165   21.6 
2025-07-18 00:00 UT   18 40 49.3   +54 43 53    10.100   10.372  102.8    5.5   164   21.6 
2025-07-19 00:00 UT   18 40 00.9   +54 42 48    10.094   10.366  102.8    5.5   163   21.6 
2025-07-20 00:00 UT   18 39 12.7   +54 41 36    10.088   10.359  102.8    5.5   161   21.6 

    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.