C/2020 F3 (NEOWISE)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	4 Jul 2020	1.6	0.294 AU	1.150 AU	06h03m	+30°20'	13.9°	56.4°	300°
Nearest approach	23 Jul 2020	3.6	0.623 AU	0.695 AU	10h28m	+44°06'	37.1°	100.7°	60°
Today	13 Mar 2025	24.5	15.400 AU	14.861 AU	14h49m	-34°20'	121.2°	3.2°	299°

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)                : 0.9992620
            q (Perihelion distance)         : 0.2939290
            i (Inclination)                 : 129.13730
            Ω (Longitude of ascending node) : 61.08880
            ω (Argument of perihelion)      : 37.36620
            L (Longitude of perihelion)     : 35.35545
            B (Latitude of perihelion)      : 28.08226
            T (Time of perihelion passage)  : 2459035.26320
            P (Orbital period in years)     : 7948.39

            Epoch                           : 2025 Mar 13
            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
2025-03-13 00:00 UT   14 49 30.7   -34 20 05    14.868   15.395  120.4    3.2   298   24.5 
2025-03-13 19:51 UT   14 49 20.6   -34 20 24    14.861   15.400  121.2    3.2   299   24.5 
2025-03-14 00:00 UT   14 49 18.4   -34 20 28    14.860   15.401  121.4    3.2   299   24.5 
2025-03-15 00:00 UT   14 49 05.8   -34 20 49    14.852   15.407  122.3    3.1   299   24.5 
2025-03-16 00:00 UT   14 48 53.0   -34 21 08    14.844   15.413  123.3    3.1   300   24.5 
2025-03-17 00:00 UT   14 48 39.9   -34 21 26    14.837   15.419  124.3    3.1   300   24.5 
2025-03-18 00:00 UT   14 48 26.5   -34 21 42    14.829   15.425  125.2    3.0   301   24.5 
2025-03-19 00:00 UT   14 48 12.9   -34 21 56    14.822   15.432  126.2    3.0   301   24.5 
2025-03-20 00:00 UT   14 47 59.1   -34 22 08    14.815   15.438  127.2    2.9   302   24.5 
2025-03-21 00:00 UT   14 47 45.0   -34 22 18    14.808   15.444  128.1    2.9   302   24.5 
2025-03-22 00:00 UT   14 47 30.6   -34 22 27    14.802   15.450  129.1    2.9   303   24.5 
2025-03-23 00:00 UT   14 47 16.1   -34 22 33    14.795   15.456  130.0    2.8   303   24.5 

    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.