C/2020 F3 (NEOWISE)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	5 Jul 2020	1.7	0.293 AU	1.147 AU	06h05m	+30°19'	13.9°	56.7°	300°
Nearest approach	24 Jul 2020	3.6	0.619 AU	0.698 AU	10h28m	+43°50'	36.8°	100.7°	60°
Today	10 Mar 2026	25.4	17.526 AU	17.031 AU	14h44m	-34°39'	118.4°	2.9°	298°

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. This lightcurve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 6.7 + 5 log[∆] + 10.1 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/2020 F3 (NEOWISE) are:

    e (Eccentricity)                : 0.9992910
    q (Perihelion distance)         : 0.2928910
    i (Inclination)                 : 129.06540
    Ω (Longitude of ascending node) : 61.04640
    ω (Argument of perihelion)      : 37.28850
    L (Longitude of perihelion)     : 35.41055
    B (Latitude of perihelion)      : 28.05909
    T (Time of perihelion passage)  : 2459035.78040
    P (Orbital period in years)     : 8396.33

    Epoch                           : 2026 Mar 09
    Reference                       : MPEC 2026-E44

    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
2026-03-09 00:00 UT   14 44 18.1   -34 38 38    17.042   17.519  117.2    2.9   298   25.4 
2026-03-10 00:00 UT   14 44 08.1   -34 39 04    17.033   17.525  118.2    2.9   298   25.4 
2026-03-10 06:38 UT   14 44 05.3   -34 39 11    17.031   17.526  118.4    2.9   298   25.4 
2026-03-11 00:00 UT   14 43 57.9   -34 39 28    17.025   17.531  119.1    2.8   299   25.4 
2026-03-12 00:00 UT   14 43 47.5   -34 39 50    17.016   17.536  120.1    2.8   299   25.4 
2026-03-13 00:00 UT   14 43 36.8   -34 40 11    17.008   17.542  121.1    2.8   300   25.4 
2026-03-14 00:00 UT   14 43 25.8   -34 40 30    17.000   17.548  122.0    2.8   300   25.4 
2026-03-15 00:00 UT   14 43 14.7   -34 40 48    16.992   17.553  123.0    2.7   301   25.4 
2026-03-16 00:00 UT   14 43 03.3   -34 41 04    16.984   17.559  123.9    2.7   301   25.4 
2026-03-17 00:00 UT   14 42 51.7   -34 41 18    16.976   17.565  124.9    2.7   302   25.4 
2026-03-18 00:00 UT   14 42 39.9   -34 41 31    16.968   17.570  125.9    2.6   302   25.4 
2026-03-19 00:00 UT   14 42 27.8   -34 41 42    16.961   17.576  126.8    2.6   303   25.4 
2026-03-20 00:00 UT   14 42 15.6   -34 41 51    16.954   17.582  127.8    2.6   303   25.4 

    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.