C/2020 F3 (NEOWISE)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	4 Jul 2020	1.6	0.294 AU	1.149 AU	06h03m	+30°20'	13.9°	56.4°	300°
Nearest approach	23 Jul 2020	3.6	0.623 AU	0.695 AU	10h28m	+44°05'	37.1°	100.7°	60°
Today	31 Mar 2025	24.6	15.507 AU	14.750 AU	14h45m	-34°22'	138.0°	2.5°	309°

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/2020 F3 (NEOWISE) are:

            e (Eccentricity)                : 0.9992640
            q (Perihelion distance)         : 0.2938510
            i (Inclination)                 : 129.13250
            Ω (Longitude of ascending node) : 61.08630
            ω (Argument of perihelion)      : 37.36280
            L (Longitude of perihelion)     : 35.35802
            B (Latitude of perihelion)      : 28.08197
            T (Time of perihelion passage)  : 2459035.29070
            P (Orbital period in years)     : 7977.63

            Epoch                           : 2025 Mar 30
            Reference                       : MPEC 2021-O56

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

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 gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (7.50 + 5 log[∆] + 13.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 6.69 + 5 log[∆] + 10.09 log[r]). The additional green curve shows the effect of forward scattering, occurring when the comet is between the earth and the sun, for a gas-to-dust light ratio δ90 of 2.00. (See Marcus 2007)

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
2025-03-31 00:00 UT   14 45 11.7   -34 22 19    14.752   15.504  137.6    2.5   309   24.6 
2025-03-31 11:27 UT   14 45 03.9   -34 22 15    14.750   15.507  138.0    2.5   309   24.6 
2025-04-01 00:00 UT   14 44 55.3   -34 22 09    14.747   15.510  138.5    2.4   309   24.6 
2025-04-02 00:00 UT   14 44 38.6   -34 21 57    14.743   15.517  139.4    2.4   310   24.6 
2025-04-03 00:00 UT   14 44 21.8   -34 21 43    14.739   15.523  140.4    2.4   311   24.6 
2025-04-04 00:00 UT   14 44 04.9   -34 21 27    14.735   15.529  141.3    2.3   312   24.6 
2025-04-05 00:00 UT   14 43 47.7   -34 21 09    14.732   15.535  142.2    2.3   313   24.6 
2025-04-06 00:00 UT   14 43 30.5   -34 20 49    14.729   15.541  143.1    2.2   313   24.6 
2025-04-07 00:00 UT   14 43 13.0   -34 20 28    14.726   15.547  144.0    2.2   314   24.6 
2025-04-08 00:00 UT   14 42 55.5   -34 20 05    14.723   15.553  144.9    2.1   315   24.6 
2025-04-09 00:00 UT   14 42 37.7   -34 19 39    14.720   15.559  145.7    2.1   316   24.6 
2025-04-10 00:00 UT   14 42 19.9   -34 19 12    14.718   15.565  146.6    2.0   317   24.6 

    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.