A/2025 A7
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	4 Mar 2025	18.5	2.894 AU	1.911 AU	10h39m	-01°59'	170.2°	3.3°	30°
Perihelion	28 Mar 2025	19.2	2.884 AU	2.095 AU	09h24m	-01°07'	134.4°	14.3°	93°
Today	30 Nov 2025	20.8	3.775 AU	3.283 AU	07h17m	-31°24'	112.7°	14.0°	316°

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 displayed light curve is calculated under the assumption that the object remains inactive. (H=14.50; G=.15).

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 A/2025 A7 are:

    e (Eccentricity)                : 0.9992480
    q (Perihelion distance)         : 2.8835380
    i (Inclination)                 : 133.65500
    Ω (Longitude of ascending node) : 348.85640
    ω (Argument of perihelion)      : 195.57980
    L (Longitude of perihelion)     : 337.96152
    B (Latitude of perihelion)      : -11.20502
    T (Time of perihelion passage)  : 2460762.61400
    P (Orbital period in years)     : 237444.30

    Epoch                           : 2025 Nov 29
    Reference                       : MPC188413

    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
2025-11-29 00:00 UT   07 19 28.0   -31 12 51     3.287    3.768  111.9   14.1   315   20.8 
2025-11-30 00:00 UT   07 17 27.4   -31 23 26     3.284    3.774  112.6   14.0   316   20.8 
2025-11-30 02:01 UT   07 17 17.2   -31 24 18     3.283    3.775  112.7   14.0   316   20.8 
2025-12-01 00:00 UT   07 15 25.2   -31 33 43     3.281    3.780  113.3   13.9   318   20.8 
2025-12-02 00:00 UT   07 13 21.5   -31 43 41     3.278    3.787  113.9   13.8   319   20.8 
2025-12-03 00:00 UT   07 11 16.2   -31 53 19     3.275    3.793  114.6   13.7   320   20.8 
2025-12-04 00:00 UT   07 09 09.4   -32 02 37     3.273    3.799  115.2   13.6   322   20.8 
2025-12-05 00:00 UT   07 07 01.3   -32 11 35     3.271    3.805  115.8   13.5   323   20.8 
2025-12-06 00:00 UT   07 04 51.8   -32 20 11     3.269    3.811  116.4   13.4   325   20.8 
2025-12-07 00:00 UT   07 02 41.0   -32 28 26     3.268    3.817  116.9   13.3   326   20.8 
2025-12-08 00:00 UT   07 00 29.0   -32 36 18     3.267    3.823  117.5   13.2   328   20.8 
2025-12-09 00:00 UT   06 58 15.9   -32 43 48     3.267    3.830  118.0   13.1   330   20.8 
2025-12-10 00:00 UT   06 56 01.7   -32 50 55     3.267    3.836  118.5   13.0   331   20.8 

    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.