313P/Gibbs
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	28 Aug 2025	19.8	2.475 AU	1.483 AU	22h34m	-23°35'	166.1°	5.6°	352°
Perihelion	2 Dec 2025	20.6	2.422 AU	2.285 AU	22h49m	-19°37'	85.8°	24.0°	68°
Today	11 Aug 2026	21.9	2.740 AU	3.223 AU	05h42m	+17°40'	53.2°	17.2°	264°

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. (15.0 + 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 313P/Gibbs are:

    e (Eccentricity)                : 0.2341770
    q (Perihelion distance)         : 2.4217250
    i (Inclination)                 : 10.98110
    Ω (Longitude of ascending node) : 105.92430
    ω (Argument of perihelion)      : 255.01770
    L (Longitude of perihelion)     : 180.67546
    B (Latitude of perihelion)      : -10.60341
    T (Time of perihelion passage)  : 2461012.33880
    P (Orbital period in years)     : 5.62

    Epoch                           : 2026 Aug 11
    Reference                       : MPC191622

    Classification(s):              : Ecliptic; Active asteroid
    Tisserand (Jupiter)             : 3.133

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-08-10 00:00 UT   05 40 01.3   +17 38 13     3.240    2.736   52.0   17.0   264   21.9 
2026-08-11 00:00 UT   05 41 29.8   +17 39 31     3.231    2.738   52.6   17.1   264   21.9 
2026-08-11 23:41 UT   05 42 56.7   +17 40 45     3.223    2.740   53.2   17.2   264   21.9 
2026-08-12 00:00 UT   05 42 57.9   +17 40 46     3.223    2.740   53.2   17.2   264   21.9 
2026-08-13 00:00 UT   05 44 25.4   +17 41 57     3.215    2.742   53.9   17.4   264   21.9 
2026-08-14 00:00 UT   05 45 52.4   +17 43 05     3.206    2.744   54.5   17.5   265   21.9 
2026-08-15 00:00 UT   05 47 18.9   +17 44 09     3.198    2.746   55.1   17.6   265   21.9 
2026-08-16 00:00 UT   05 48 44.8   +17 45 10     3.189    2.748   55.7   17.7   265   21.9 
2026-08-17 00:00 UT   05 50 10.2   +17 46 07     3.180    2.751   56.3   17.8   265   21.9 
2026-08-18 00:00 UT   05 51 35.1   +17 47 02     3.171    2.753   56.9   17.9   265   21.9 
2026-08-19 00:00 UT   05 52 59.4   +17 47 53     3.162    2.755   57.5   18.1   266   21.9 
2026-08-20 00:00 UT   05 54 23.1   +17 48 41     3.153    2.757   58.2   18.2   266   21.9 
2026-08-21 00:00 UT   05 55 46.2   +17 49 26     3.144    2.759   58.8   18.3   266   21.9 

    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.