C/2020 X3 (SOHO)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	14 Dec 2020	6.8	0.005 AU	0.988 AU	17h30m	-23°07'	0.2°	51.1°	55°
Nearest approach	6 Jan 2021	15.9	0.873 AU	0.551 AU	17h14m	-83°40'	62.0°	84.1°	210°
Today	27 Apr 2026	33.8	17.223 AU	17.558 AU	06h38m	-10°54'	69.0°	3.1°	110°

This comet is a sungrazer. Although it may become very bright at perihelion, this will only be for a very short period very close to the sun.

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 17.6 + 5 log[∆] + 8.0 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 X3 (SOHO) are:

    e (Eccentricity)                : 1.0000000
    q (Perihelion distance)         : 0.0050117
    i (Inclination)                 : 143.93683
    Ω (Longitude of ascending node) : 357.16186
    ω (Argument of perihelion)      : 77.35832
    L (Longitude of perihelion)     : 282.66910
    B (Latitude of perihelion)      : 35.05805
    T (Time of perihelion passage)  : 2459198.44587

    Epoch                           : 2020 Dec 17
    Reference                       : MPEC 2020-Y19

    Classification(s):              : Nearly isotropic; New (a > 10000 AU); Sungrazer; Kreutz

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-04-26 00:00 UT   06 38 04.7   -10 57 03    17.528   17.214   70.2    3.2   109   33.7 
2026-04-27 00:00 UT   06 38 10.9   -10 55 28    17.547   17.220   69.4    3.1   109   33.7 
2026-04-27 13:48 UT   06 38 14.6   -10 54 34    17.558   17.223   69.0    3.1   110   33.8 
2026-04-28 00:00 UT   06 38 17.3   -10 53 55    17.566   17.226   68.7    3.1   110   33.8 
2026-04-29 00:00 UT   06 38 23.9   -10 52 22    17.584   17.232   67.9    3.1   110   33.8 
2026-04-30 00:00 UT   06 38 30.6   -10 50 51    17.603   17.237   67.2    3.1   111   33.8 
2026-05-01 00:00 UT   06 38 37.6   -10 49 22    17.621   17.243   66.4    3.1   112   33.8 
2026-05-02 00:00 UT   06 38 44.7   -10 47 53    17.640   17.249   65.6    3.1   112   33.8 
2026-05-03 00:00 UT   06 38 52.0   -10 46 26    17.658   17.255   64.9    3.0   113   33.8 
2026-05-04 00:00 UT   06 38 59.5   -10 45 00    17.676   17.261   64.2    3.0   114   33.8 
2026-05-05 00:00 UT   06 39 07.1   -10 43 36    17.694   17.267   63.4    3.0   114   33.8 
2026-05-06 00:00 UT   06 39 14.9   -10 42 13    17.712   17.273   62.7    3.0   115   33.8 
2026-05-07 00:00 UT   06 39 22.9   -10 40 52    17.729   17.278   61.9    3.0   116   33.8 

    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.