C/2022 E3 (ZTF)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	12 Jan 2023	6.9	1.118 AU	0.713 AU	15h43m	+38°41'	80.7°	60.3°	308°
Nearest approach	1 Feb 2023	5.1	1.165 AU	0.285 AU	06h40m	+70°25'	122.9°	45.3°	140°
Today	24 Sep 2026	23.7	12.426 AU	12.008 AU	02h04m	-63°23'	112.4°	4.3°	327°

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 7.2 + 5 log[∆] + 10.2 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/2022 E3 (ZTF) are:

    e (Eccentricity)                : 1.0000660
    q (Perihelion distance)         : 1.1179090
    i (Inclination)                 : 109.18080
    Ω (Longitude of ascending node) : 302.48890
    ω (Argument of perihelion)      : 145.89230
    L (Longitude of perihelion)     : 315.03340
    B (Latitude of perihelion)      : 31.97986
    T (Time of perihelion passage)  : 2459956.73670

    Epoch                           : 2026 Sep 23
    Reference                       : MPC194179

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-09-23 00:00 UT   02 05 26.4   -63 20 32    11.998   12.418  112.6    4.3   325   23.7 
2026-09-24 00:00 UT   02 04 45.7   -63 23 23    12.007   12.425  112.4    4.3   327   23.7 
2026-09-24 04:41 UT   02 04 37.7   -63 23 56    12.008   12.426  112.4    4.3   327   23.7 
2026-09-25 00:00 UT   02 04 04.5   -63 26 09    12.016   12.431  112.3    4.3   328   23.7 
2026-09-26 00:00 UT   02 03 22.9   -63 28 51    12.025   12.438  112.1    4.3   329   23.7 
2026-09-27 00:00 UT   02 02 40.9   -63 31 27    12.035   12.444  111.9    4.3   330   23.7 
2026-09-28 00:00 UT   02 01 58.5   -63 33 59    12.044   12.451  111.8    4.3   331   23.7 
2026-09-29 00:00 UT   02 01 15.7   -63 36 25    12.054   12.458  111.6    4.3   333   23.7 
2026-09-30 00:00 UT   02 00 32.5   -63 38 46    12.064   12.464  111.4    4.3   334   23.7 
2026-10-01 00:00 UT   01 59 48.9   -63 41 02    12.074   12.471  111.2    4.3   335   23.7 
2026-10-02 00:00 UT   01 59 05.1   -63 43 13    12.084   12.477  110.9    4.3   336   23.7 
2026-10-03 00:00 UT   01 58 20.9   -63 45 18    12.094   12.484  110.7    4.3   338   23.7 
2026-10-04 00:00 UT   01 57 36.3   -63 47 18    12.105   12.491  110.5    4.3   339   23.7 

    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.