C/2015 V2 (Johnson)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	4 Jun 2017	7.9	1.635 AU	0.779 AU	14h46m	+16°18'	131.0°	27.9°	141°
Perihelion	9 Jun 2017	7.9	1.634 AU	0.784 AU	14h38m	+10°44'	130.0°	28.4°	133°
Today	20 Mar 2026	22.9	22.436 AU	23.117 AU	02h50m	-17°55'	45.9°	1.8°	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 7.0 + 5 log[∆] + 6.8 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/2015 V2 (Johnson) are:

    e (Eccentricity)                : 1.0008520
    q (Perihelion distance)         : 1.6336790
    i (Inclination)                 : 49.75450
    Ω (Longitude of ascending node) : 70.09010
    ω (Argument of perihelion)      : 164.68890
    L (Longitude of perihelion)     : 60.05950
    B (Latitude of perihelion)      : 11.62776
    T (Time of perihelion passage)  : 2457913.72340

    Epoch                           : 2026 Mar 19
    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
2026-03-19 00:00 UT   02 50 45.0   -17 58 03    23.095   22.428   46.9    1.9   106   22.9 
2026-03-20 00:00 UT   02 50 52.5   -17 56 23    23.108   22.433   46.3    1.8   107   22.9 
2026-03-20 15:32 UT   02 50 57.4   -17 55 19    23.117   22.436   45.9    1.8   108   22.9 
2026-03-21 00:00 UT   02 51 00.1   -17 54 45    23.122   22.437   45.7    1.8   108   22.9 
2026-03-22 00:00 UT   02 51 07.9   -17 53 06    23.135   22.442   45.0    1.8   109   22.9 
2026-03-23 00:00 UT   02 51 15.8   -17 51 29    23.148   22.447   44.4    1.8   110   22.9 
2026-03-24 00:00 UT   02 51 23.8   -17 49 52    23.160   22.452   43.8    1.8   112   22.9 
2026-03-25 00:00 UT   02 51 31.9   -17 48 17    23.173   22.457   43.2    1.7   113   22.9 
2026-03-26 00:00 UT   02 51 40.1   -17 46 41    23.185   22.462   42.6    1.7   114   22.9 
2026-03-27 00:00 UT   02 51 48.4   -17 45 07    23.198   22.467   42.0    1.7   115   23.0 
2026-03-28 00:00 UT   02 51 56.8   -17 43 34    23.209   22.472   41.5    1.7   116   23.0 
2026-03-29 00:00 UT   02 52 05.3   -17 42 01    23.221   22.477   40.9    1.7   117   23.0 
2026-03-30 00:00 UT   02 52 13.9   -17 40 29    23.233   22.482   40.4    1.6   118   23.0 

    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.