C/2024 R4 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Today	9 May 2025	20.3	8.164 AU	8.607 AU	22h48m	+16°33'	60.9°	6.2°	259°
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)                : 1.0026480
            q (Perihelion distance)         : 4.4092260
            i (Inclination)                 : 95.35940
            Ω (Longitude of ascending node) : 345.93360
            ω (Argument of perihelion)      : 108.98990
            L (Longitude of perihelion)     : 1.11882
            B (Latitude of perihelion)      : 70.29520
            T (Time of perihelion passage)  : 2461705.11450

            Epoch                           : 2025 May 08
            Reference                       : MPEC 2025-J72

            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
2025-05-09 00:00 UT   22 48 09.0   +16 31 50     8.611    8.165   60.7    6.2   259   20.3 
2025-05-09 05:52 UT   22 48 10.5   +16 33 14     8.607    8.164   60.9    6.2   259   20.3 
2025-05-10 00:00 UT   22 48 15.3   +16 37 35     8.592    8.159   61.6    6.2   259   20.3 
2025-05-11 00:00 UT   22 48 21.2   +16 43 20     8.573    8.154   62.4    6.3   258   20.3 
2025-05-12 00:00 UT   22 48 26.8   +16 49 06     8.553    8.148   63.2    6.4   258   20.3 
2025-05-13 00:00 UT   22 48 31.9   +16 54 51     8.534    8.142   64.1    6.4   257   20.3 
2025-05-14 00:00 UT   22 48 36.7   +17 00 37     8.514    8.136   64.9    6.5   257   20.3 
2025-05-15 00:00 UT   22 48 41.1   +17 06 24     8.494    8.131   65.7    6.5   257   20.2 
2025-05-16 00:00 UT   22 48 45.0   +17 12 10     8.474    8.125   66.6    6.6   256   20.2 
2025-05-17 00:00 UT   22 48 48.6   +17 17 56     8.454    8.119   67.4    6.6   256   20.2 
2025-05-18 00:00 UT   22 48 51.7   +17 23 43     8.434    8.113   68.2    6.6   255   20.2 
2025-05-19 00:00 UT   22 48 54.4   +17 29 30     8.414    8.107   69.1    6.7   255   20.2 

    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.