C/2019 O3 (Palomar)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	23 Jul 2020	16.5	8.917 AU	8.273 AU	19h24m	+32°07'	126.7°	5.2°	166°
Perihelion	7 Mar 2021	16.7	8.820 AU	9.213 AU	19h42m	+36°01'	63.8°	5.8°	299°
Today	23 Apr 2026	21.0	13.612 AU	13.679 AU	08h58m	+66°36'	84.0°	4.2°	108°

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 -5.3 + 5 log[∆] + 18.1 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/2019 O3 (Palomar) are:

    e (Eccentricity)                : 1.0014910
    q (Perihelion distance)         : 8.8199390
    i (Inclination)                 : 89.78970
    Ω (Longitude of ascending node) : 300.48440
    ω (Argument of perihelion)      : 60.06840
    L (Longitude of perihelion)     : 300.84965
    B (Latitude of perihelion)      : 60.06773
    T (Time of perihelion passage)  : 2459280.68430

    Epoch                           : 2026 Apr 22
    Reference                       : MPEC 2026-E44

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-04-22 00:00 UT   08 58 57.1   +66 42 44    13.658   13.606   84.9    4.2   109   20.9 
2026-04-23 00:00 UT   08 58 45.2   +66 38 23    13.674   13.610   84.3    4.2   108   21.0 
2026-04-23 08:03 UT   08 58 41.5   +66 36 55    13.679   13.612   84.0    4.2   108   21.0 
2026-04-24 00:00 UT   08 58 34.2   +66 34 01    13.689   13.614   83.6    4.2   107   21.0 
2026-04-25 00:00 UT   08 58 23.9   +66 29 39    13.705   13.618   83.0    4.2   106   21.0 
2026-04-26 00:00 UT   08 58 14.5   +66 25 16    13.720   13.622   82.3    4.2   106   21.0 
2026-04-27 00:00 UT   08 58 05.8   +66 20 52    13.736   13.626   81.6    4.2   105   21.0 
2026-04-28 00:00 UT   08 57 57.8   +66 16 28    13.751   13.630   81.0    4.2   104   21.0 
2026-04-29 00:00 UT   08 57 50.6   +66 12 03    13.766   13.634   80.3    4.2   104   21.0 
2026-04-30 00:00 UT   08 57 44.2   +66 07 38    13.782   13.638   79.7    4.2   103   21.0 
2026-05-01 00:00 UT   08 57 38.5   +66 03 13    13.797   13.642   79.0    4.2   102   21.0 
2026-05-02 00:00 UT   08 57 33.5   +65 58 47    13.812   13.646   78.4    4.1   101   21.0 
2026-05-03 00:00 UT   08 57 29.2   +65 54 21    13.828   13.650   77.7    4.1   101   21.0 

    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.