C/2021 T2 (Fuls)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	8 Jun 2022	17.8	1.244 AU	1.472 AU	03h42m	-30°09'	56.5°	42.9°	203°
Nearest approach	6 Jul 2022	17.4	1.319 AU	1.138 AU	07h11m	-52°35'	75.3°	48.2°	178°
Today	5 Jul 2025	26.8	10.792 AU	10.763 AU	13h50m	+29°47'	88.9°	5.4°	116°

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/2021 T2 (Fuls) are:

            e (Eccentricity)                : 1.0005360
            q (Perihelion distance)         : 1.2440730
            i (Inclination)                 : 117.51120
            Ω (Longitude of ascending node) : 223.20660
            ω (Argument of perihelion)      : 263.52630
            L (Longitude of perihelion)     : 147.00797
            B (Latitude of perihelion)      : -61.79537
            T (Time of perihelion passage)  : 2459738.83650

            Epoch                           : 2025 Jul 05
            Reference                       : MPEC 2023-A50

            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 estimated manually by the author. (16.50 + 5 log[∆] + 5.00 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
2025-07-05 00:00 UT   13 50 11.2   +29 49 56    10.743   10.785   89.7    5.4   116   26.8 
2025-07-05 23:23 UT   13 50 04.8   +29 47 40    10.763   10.792   88.9    5.4   116   26.8 
2025-07-06 00:00 UT   13 50 04.7   +29 47 36    10.763   10.792   88.9    5.4   116   26.8 
2025-07-07 00:00 UT   13 49 58.6   +29 45 15    10.784   10.799   88.2    5.4   115   26.8 
2025-07-08 00:00 UT   13 49 52.9   +29 42 51    10.804   10.806   87.4    5.4   115   26.8 
2025-07-09 00:00 UT   13 49 47.6   +29 40 27    10.824   10.813   86.7    5.4   114   26.8 
2025-07-10 00:00 UT   13 49 42.8   +29 37 60    10.845   10.820   85.9    5.4   113   26.8 
2025-07-11 00:00 UT   13 49 38.3   +29 35 32    10.865   10.827   85.2    5.4   113   26.9 
2025-07-12 00:00 UT   13 49 34.2   +29 33 02    10.885   10.834   84.4    5.4   112   26.9 
2025-07-13 00:00 UT   13 49 30.6   +29 30 31    10.906   10.841   83.7    5.3   112   26.9 
2025-07-14 00:00 UT   13 49 27.3   +29 27 58    10.926   10.848   82.9    5.3   111   26.9 
2025-07-15 00:00 UT   13 49 24.4   +29 25 24    10.946   10.855   82.2    5.3   110   26.9 

    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.