C/2013 V5 (Oukaimeden)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	14 Sep 2014	5.4	0.682 AU	0.475 AU	10h25m	-29°22'	36.1°	119.7°	208°
Perihelion	26 Sep 2014	6.3	0.637 AU	0.709 AU	14h04m	-29°20'	39.2°	96.1°	131°
Today	18 Oct 2025	30.5	27.051 AU	27.697 AU	11h23m	+27°28'	48.8°	1.6°	315°

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. The light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (9.0 + 5 log[∆] + 10.0 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/2013 V5 (Oukaimeden) are:

    e (Eccentricity)                : 0.9980840
    q (Perihelion distance)         : 0.6373060
    i (Inclination)                 : 154.88630
    Ω (Longitude of ascending node) : 278.76790
    ω (Argument of perihelion)      : 314.91330
    L (Longitude of perihelion)     : 321.01400
    B (Latitude of perihelion)      : -17.49131
    T (Time of perihelion passage)  : 2456926.67650
    P (Orbital period in years)     : 6066.37

    Epoch                           : 2020 Sep 26
    Reference                       : MPC102951

    Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); External (P > 200 years)

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-10-17 00:00 UT   11 23 18.4   +27 28 35    27.709   27.043   47.3    1.6   316   30.5 
2025-10-18 00:00 UT   11 23 25.2   +27 28 28    27.702   27.048   48.1    1.6   316   30.5 
2025-10-18 17:32 UT   11 23 30.1   +27 28 24    27.697   27.051   48.8    1.6   315   30.5 
2025-10-19 00:00 UT   11 23 32.0   +27 28 23    27.695   27.053   49.0    1.6   315   30.5 
2025-10-20 00:00 UT   11 23 38.6   +27 28 19    27.688   27.057   49.8    1.6   314   30.5 
2025-10-21 00:00 UT   11 23 45.2   +27 28 15    27.680   27.062   50.7    1.6   314   30.5 
2025-10-22 00:00 UT   11 23 51.7   +27 28 13    27.673   27.066   51.6    1.7   313   30.5 
2025-10-23 00:00 UT   11 23 58.1   +27 28 12    27.665   27.071   52.4    1.7   313   30.5 
2025-10-24 00:00 UT   11 24 04.4   +27 28 13    27.657   27.075   53.3    1.7   312   30.5 
2025-10-25 00:00 UT   11 24 10.7   +27 28 14    27.649   27.080   54.2    1.7   312   30.5 
2025-10-26 00:00 UT   11 24 16.8   +27 28 17    27.641   27.084   55.0    1.7   311   30.5 
2025-10-27 00:00 UT   11 24 22.8   +27 28 21    27.633   27.089   55.9    1.7   311   30.5 
2025-10-28 00:00 UT   11 24 28.7   +27 28 26    27.624   27.093   56.8    1.8   310   30.5 

    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.