C/2020 F8 (SWAN) - DISINTEGRATED
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Disintegration	2 May 2020	5.2	0.747 AU	0.703 AU	00h04m	-13°53'	47.8°	88.0°	234°
Nearest approach	11 May 2020	5.7	0.574 AU	0.560 AU	01h21m	+16°50'	27.4°	126.0°	263°
Perihelion	26 May 2020	7.7	0.430 AU	0.909 AU	04h26m	+46°16'	25.1°	91.1°	6°
Today	19 Apr 2024	-	13.516 AU	14.173 AU	04h13m	-20°47'	47.5°	3.1°	130°

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 F8 (SWAN) are:

            e (Eccentricity)                : 1.0001350
            q (Perihelion distance)         : 0.4302470
            i (Inclination)                 : 110.57590
            Ω (Longitude of ascending node) : 259.82550
            ω (Argument of perihelion)      : 68.07430
            L (Longitude of perihelion)     : 218.70057
            B (Latitude of perihelion)      : 60.28370
            T (Time of perihelion passage)  : 2458996.30310

            Epoch                           : 2024 Apr 19
            Reference                       : MPEC 2023-J29

            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 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 (10.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 7.59 + 5 log[∆] + 12.54 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 0.30. (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
2024-04-19 00:00 UT   04 13 27.0   -20 48 48    14.161   13.509   47.9    3.2   128   27.5 
2024-04-19 23:20 UT   04 13 40.6   -20 47 04    14.173   13.516   47.5    3.1   130   27.5 
2024-04-20 00:00 UT   04 13 41.0   -20 47 01    14.174   13.516   47.5    3.1   130   27.5 
2024-04-21 00:00 UT   04 13 55.1   -20 45 17    14.186   13.522   47.1    3.1   131   27.5 
2024-04-22 00:00 UT   04 14 09.3   -20 43 35    14.198   13.529   46.7    3.1   132   27.5 
2024-04-23 00:00 UT   04 14 23.7   -20 41 55    14.210   13.535   46.3    3.1   133   27.5 
2024-04-24 00:00 UT   04 14 38.2   -20 40 18    14.222   13.542   45.9    3.1   134   27.5 
2024-04-25 00:00 UT   04 14 52.9   -20 38 42    14.233   13.548   45.6    3.0   135   27.5 
2024-04-26 00:00 UT   04 15 07.6   -20 37 09    14.245   13.555   45.2    3.0   136   27.6 
2024-04-27 00:00 UT   04 15 22.5   -20 35 38    14.256   13.561   44.9    3.0   138   27.6 
2024-04-28 00:00 UT   04 15 37.5   -20 34 09    14.267   13.568   44.5    3.0   139   27.6 
2024-04-29 00:00 UT   04 15 52.6   -20 32 42    14.277   13.574   44.2    3.0   140   27.6 

    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.