C/2024 R4 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Today	8 Aug 2025	19.5	7.637 AU	6.866 AU	22h23m	+23°46'	136.8°	5.2°	205°
Perihelion	26 Oct 2027	16.3	4.409 AU	4.791 AU	14h52m	+48°25'	61.8°	11.5°	14°
Nearest approach	13 Mar 2028	16.1	4.554 AU	3.991 AU	14h03m	+56°13'	118.8°	11.0°	223°

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/2024 R4 (PANSTARRS) are:

            e (Eccentricity)                : 1.0025920
            q (Perihelion distance)         : 4.4090270
            i (Inclination)                 : 95.36490
            Ω (Longitude of ascending node) : 345.93610
            ω (Argument of perihelion)      : 108.99480
            L (Longitude of perihelion)     : 1.13211
            B (Latitude of perihelion)      : 70.28905
            T (Time of perihelion passage)  : 2461705.15500

            Epoch                           : 2025 Aug 07
            Reference                       : MPEC 2025-PB3

            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. (6.50 + 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
2025-08-08 00:00 UT   22 23 44.4   +23 45 13     6.876    7.641  136.3    5.3   206   19.5 
2025-08-08 17:59 UT   22 23 14.8   +23 46 50     6.866    7.637  136.8    5.2   205   19.5 
2025-08-09 00:00 UT   22 23 04.8   +23 47 21     6.863    7.635  136.9    5.2   204   19.5 
2025-08-10 00:00 UT   22 22 24.9   +23 49 25     6.851    7.629  137.6    5.1   203   19.5 
2025-08-11 00:00 UT   22 21 44.7   +23 51 23     6.838    7.624  138.2    5.1   202   19.5 
2025-08-12 00:00 UT   22 21 04.1   +23 53 15     6.826    7.618  138.8    5.0   200   19.5 
2025-08-13 00:00 UT   22 20 23.2   +23 55 02     6.814    7.612  139.4    5.0   199   19.5 
2025-08-14 00:00 UT   22 19 42.1   +23 56 43     6.803    7.607  140.0    4.9   197   19.5 
2025-08-15 00:00 UT   22 19 00.6   +23 58 18     6.791    7.601  140.6    4.9   196   19.5 
2025-08-16 00:00 UT   22 18 18.9   +23 59 47     6.780    7.595  141.1    4.8   194   19.5 
2025-08-17 00:00 UT   22 17 36.9   +24 01 11     6.770    7.589  141.6    4.7   193   19.5 
2025-08-18 00:00 UT   22 16 54.7   +24 02 29     6.759    7.584  142.1    4.7   191   19.4 

    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.