C/2025 M1 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Today	30 Jun 2025	19.6	13.265 AU	12.410 AU	16h09m	-20°41'	146.0°	2.5°	101°
Nearest approach	23 Jun 2029	18.3	10.831 AU	10.111 AU	18h24m	-70°16'	133.1°	3.9°	355°
Perihelion	3 Aug 2029	18.3	10.829 AU	10.280 AU	17h52m	-70°46'	120.4°	4.6°	51°

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 M1 (PANSTARRS) are:

            e (Eccentricity)                : 0.9981990
            q (Perihelion distance)         : 10.8290150
            i (Inclination)                 : 64.90130
            Ω (Longitude of ascending node) : 66.95860
            ω (Argument of perihelion)      : 230.42680
            L (Longitude of perihelion)     : 94.12698
            B (Latitude of perihelion)      : -44.26917
            T (Time of perihelion passage)  : 2462351.73200
            P (Orbital period in years)     : 466243.58

            Epoch                           : 2025 Jun 29
            Reference                       : MPEC 2025-MD2

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

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. (2.90 + 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
2025-06-30 00:00 UT   16 09 50.3   -20 40 53    12.408   13.265  146.2    2.4   101   19.6 
2025-06-30 06:01 UT   16 09 46.6   -20 41 07    12.410   13.265  146.0    2.5   101   19.6 
2025-07-01 00:00 UT   16 09 35.7   -20 41 48    12.415   13.263  145.2    2.5   101   19.6 
2025-07-02 00:00 UT   16 09 21.2   -20 42 43    12.422   13.260  144.2    2.6   101   19.6 
2025-07-03 00:00 UT   16 09 07.0   -20 43 39    12.429   13.257  143.2    2.6   101   19.6 
2025-07-04 00:00 UT   16 08 52.9   -20 44 35    12.436   13.254  142.2    2.7   101   19.6 
2025-07-05 00:00 UT   16 08 39.1   -20 45 31    12.444   13.251  141.2    2.8   101   19.6 
2025-07-06 00:00 UT   16 08 25.5   -20 46 28    12.451   13.248  140.2    2.8   101   19.6 
2025-07-07 00:00 UT   16 08 12.2   -20 47 25    12.459   13.245  139.2    2.9   101   19.6 
2025-07-08 00:00 UT   16 07 59.0   -20 48 23    12.467   13.243  138.2    2.9   101   19.6 
2025-07-09 00:00 UT   16 07 46.1   -20 49 21    12.476   13.240  137.2    3.0   101   19.6 
2025-07-10 00:00 UT   16 07 33.5   -20 50 19    12.485   13.237  136.2    3.0   101   19.6 

    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.