C/2024 G4 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Today	28 Jan 2026	18.7	4.917 AU	5.741 AU	19h03m	+00°03'	30.4°	5.8°	308°
Perihelion	21 Mar 2026	18.5	4.901 AU	5.282 AU	19h52m	+01°46'	62.4°	10.4°	271°
Nearest approach	23 Jul 2026	18.0	4.995 AU	4.038 AU	20h11m	+01°57'	158.0°	4.4°	180°

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. (8.0 + 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 C/2024 G4 (PANSTARRS) are:

    e (Eccentricity)                : 0.9985630
    q (Perihelion distance)         : 4.9006300
    i (Inclination)                 : 33.02800
    Ω (Longitude of ascending node) : 152.97380
    ω (Argument of perihelion)      : 131.41270
    L (Longitude of perihelion)     : 109.42580
    B (Latitude of perihelion)      : 24.12742
    T (Time of perihelion passage)  : 2461121.00160
    P (Orbital period in years)     : 199155.69

    Epoch                           : 2026 Jan 27
    Reference                       : MPEC 2025-V36

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-01-27 00:00 UT   19 01 44.5   +00 02 23     5.749    4.918   29.8    5.7   310   18.7 
2026-01-28 00:00 UT   19 02 48.1   +00 03 08     5.743    4.918   30.2    5.8   309   18.7 
2026-01-28 10:14 UT   19 03 15.2   +00 03 28     5.741    4.917   30.4    5.8   308   18.7 
2026-01-29 00:00 UT   19 03 51.6   +00 03 56     5.738    4.917   30.7    5.9   308   18.7 
2026-01-30 00:00 UT   19 04 55.0   +00 04 47     5.733    4.916   31.2    6.0   306   18.7 
2026-01-31 00:00 UT   19 05 58.1   +00 05 41     5.727    4.916   31.6    6.0   305   18.7 
2026-02-01 00:00 UT   19 07 01.0   +00 06 40     5.721    4.915   32.1    6.1   304   18.7 
2026-02-02 00:00 UT   19 08 03.8   +00 07 41     5.715    4.914   32.6    6.2   303   18.7 
2026-02-03 00:00 UT   19 09 06.4   +00 08 46     5.709    4.914   33.2    6.3   302   18.7 
2026-02-04 00:00 UT   19 10 08.7   +00 09 54     5.703    4.913   33.7    6.4   301   18.7 
2026-02-05 00:00 UT   19 11 10.9   +00 11 05     5.697    4.913   34.2    6.5   300   18.7 
2026-02-06 00:00 UT   19 12 12.8   +00 12 19     5.690    4.912   34.7    6.6   299   18.7 
2026-02-07 00:00 UT   19 13 14.6   +00 13 37     5.684    4.912   35.3    6.7   298   18.7 

    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.