C/2019 V1 (Borisov)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	30 Dec 2019	19.1	3.645 AU	2.697 AU	05h19m	+29°32'	162.0°	4.8°	106°
Perihelion	17 Jul 2020	19.2	3.093 AU	3.894 AU	08h20m	+53°39'	33.1°	10.3°	14°
Today	5 Jul 2025	28.3	13.915 AU	12.986 AU	17h13m	-18°16'	155.1°	1.8°	105°

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 V1 (Borisov) are:

            e (Eccentricity)                : 0.9988250
            q (Perihelion distance)         : 3.0928750
            i (Inclination)                 : 61.94820
            Ω (Longitude of ascending node) : 83.14810
            ω (Argument of perihelion)      : 51.19320
            L (Longitude of perihelion)     : 113.46529
            B (Latitude of perihelion)      : 43.44973
            T (Time of perihelion passage)  : 2459048.07190
            P (Orbital period in years)     : 135047.56

            Epoch                           : 2025 Jul 04
            Reference                       : MPEC 2022-N37

            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 (11.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 11.30 + 5 log[∆] + 10.00 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
2025-07-05 00:00 UT   17 14 10.8   -18 16 05    12.978   13.911  155.8    1.7   105   28.3 
2025-07-05 16:39 UT   17 13 60.0   -18 16 29    12.986   13.915  155.1    1.8   105   28.3 
2025-07-06 00:00 UT   17 13 55.2   -18 16 40    12.990   13.917  154.8    1.8   105   28.3 
2025-07-07 00:00 UT   17 13 39.8   -18 17 15    13.003   13.923  153.8    1.8   104   28.3 
2025-07-08 00:00 UT   17 13 24.5   -18 17 51    13.016   13.929  152.8    1.9   104   28.3 
2025-07-09 00:00 UT   17 13 09.4   -18 18 27    13.030   13.934  151.8    2.0   103   28.3 
2025-07-10 00:00 UT   17 12 54.4   -18 19 04    13.044   13.940  150.8    2.0   103   28.3 
2025-07-11 00:00 UT   17 12 39.7   -18 19 41    13.058   13.946  149.8    2.1   103   28.3 
2025-07-12 00:00 UT   17 12 25.1   -18 20 18    13.072   13.952  148.8    2.2   102   28.3 
2025-07-13 00:00 UT   17 12 10.7   -18 20 55    13.086   13.957  147.8    2.2   102   28.3 
2025-07-14 00:00 UT   17 11 56.5   -18 21 33    13.101   13.963  146.8    2.3   102   28.3 
2025-07-15 00:00 UT   17 11 42.5   -18 22 11    13.116   13.969  145.8    2.3   102   28.3 

    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.