C/2024 G7 (ATLAS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	9 Feb 2025	18.8	6.027 AU	6.368 AU	17h22m	-65°08'	65.6°	8.6°	251°
Nearest approach	22 May 2025	18.5	6.069 AU	5.345 AU	14h32m	-66°23'	132.1°	7.1°	27°
Today	19 Sep 2026	20.2	7.259 AU	8.111 AU	13h02m	-22°14'	30.0°	4.0°	140°

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. (7.0 + 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 G7 (ATLAS) are:

    e (Eccentricity)                : 1.0011850
    q (Perihelion distance)         : 6.0273120
    i (Inclination)                 : 131.50250
    Ω (Longitude of ascending node) : 191.97720
    ω (Argument of perihelion)      : 289.64670
    L (Longitude of perihelion)     : 253.66373
    B (Latitude of perihelion)      : -44.85597
    T (Time of perihelion passage)  : 2460716.32680

    Epoch                           : 2026 Sep 19
    Reference                       : MPC194189

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-09-18 00:00 UT   13 01 55.0   -22 17 20     8.091    7.252   31.4    4.1   138   20.1 
2026-09-19 00:00 UT   13 02 17.5   -22 15 56     8.102    7.256   30.6    4.0   139   20.1 
2026-09-19 17:50 UT   13 02 34.3   -22 14 56     8.111    7.259   30.0    4.0   140   20.2 
2026-09-20 00:00 UT   13 02 40.2   -22 14 36     8.114    7.260   29.8    3.9   140   20.2 
2026-09-21 00:00 UT   13 03 02.9   -22 13 18     8.125    7.263   29.0    3.8   141   20.2 
2026-09-22 00:00 UT   13 03 25.7   -22 12 03     8.136    7.267   28.2    3.7   142   20.2 
2026-09-23 00:00 UT   13 03 48.5   -22 10 50     8.147    7.271   27.4    3.6   142   20.2 
2026-09-24 00:00 UT   13 04 11.5   -22 09 40     8.157    7.274   26.6    3.5   143   20.2 
2026-09-25 00:00 UT   13 04 34.6   -22 08 33     8.168    7.278   25.8    3.4   144   20.2 
2026-09-26 00:00 UT   13 04 57.7   -22 07 29     8.178    7.282   25.1    3.3   145   20.2 
2026-09-27 00:00 UT   13 05 20.8   -22 06 27     8.187    7.286   24.3    3.2   147   20.2 
2026-09-28 00:00 UT   13 05 44.1   -22 05 27     8.197    7.289   23.5    3.1   148   20.2 
2026-09-29 00:00 UT   13 06 07.4   -22 04 30     8.206    7.293   22.8    3.1   149   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.