C/2019 D1 (Flewelling)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	10 May 2019	14.7	1.590 AU	1.615 AU	22h04m	+21°52'	70.3°	36.7°	259°
Nearest approach	9 Sep 2019	17.4	2.260 AU	1.543 AU	01h09m	+44°35'	123.5°	21.8°	216°
Today	9 May 2024	37.5	14.810 AU	15.639 AU	05h15m	+06°01'	33.6°	2.2°	113°

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/2019 D1 (Flewelling) are:

            e (Eccentricity)                : 0.9886290
            q (Perihelion distance)         : 1.5899930
            i (Inclination)                 : 33.99430
            Ω (Longitude of ascending node) : 231.64510
            ω (Argument of perihelion)      : 70.73330
            L (Longitude of perihelion)     : 298.78499
            B (Latitude of perihelion)      : 31.85668
            T (Time of perihelion passage)  : 2458613.61560
            P (Orbital period in years)     : 1653.46

            Epoch                           : 2024 May 08
            Reference                       : MPEC 2022-O08

            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 (13.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 9.91 + 5 log[∆] + 18.44 log[r]).

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
2024-05-09 00:00 UT   05 15 01.8   +06 01 10    15.635   14.808   33.9    2.2   112   37.5 
2024-05-09 07:11 UT   05 15 06.2   +06 01 21    15.639   14.810   33.6    2.2   113   37.5 
2024-05-10 00:00 UT   05 15 16.4   +06 01 46    15.649   14.814   33.1    2.1   113   37.5 
2024-05-11 00:00 UT   05 15 31.2   +06 02 21    15.663   14.820   32.3    2.1   114   37.5 
2024-05-12 00:00 UT   05 15 46.0   +06 02 55    15.676   14.826   31.6    2.0   115   37.5 
2024-05-13 00:00 UT   05 16 01.0   +06 03 28    15.689   14.831   30.8    2.0   116   37.5 
2024-05-14 00:00 UT   05 16 16.0   +06 03 60    15.702   14.837   30.1    2.0   117   37.5 
2024-05-15 00:00 UT   05 16 31.1   +06 04 31    15.715   14.843   29.4    1.9   118   37.5 
2024-05-16 00:00 UT   05 16 46.3   +06 05 01    15.727   14.849   28.7    1.9   119   37.5 
2024-05-17 00:00 UT   05 17 01.6   +06 05 30    15.740   14.854   27.9    1.8   121   37.5 
2024-05-18 00:00 UT   05 17 17.0   +06 05 58    15.752   14.860   27.2    1.8   122   37.5 
2024-05-19 00:00 UT   05 17 32.4   +06 06 25    15.764   14.866   26.6    1.7   123   37.5 

    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.