P/2020 S7 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	17 Sep 2020	20.8	3.000 AU	2.007 AU	23h19m	+07°26'	169.1°	3.6°	148°
Perihelion	17 Nov 2020	21.2	2.976 AU	2.430 AU	23h02m	+07°40'	114.2°	17.6°	73°
Today	19 Oct 2025	27.4	7.013 AU	7.891 AU	11h50m	-06°39'	26.4°	3.6°	279°

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. (14.5 + 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 P/2020 S7 (PANSTARRS) are:

    e (Eccentricity)                : 0.4093080
    q (Perihelion distance)         : 2.9755620
    i (Inclination)                 : 16.06810
    Ω (Longitude of ascending node) : 328.07890
    ω (Argument of perihelion)      : 40.66690
    L (Longitude of perihelion)     : 7.62088
    B (Latitude of perihelion)      : 10.39110
    T (Time of perihelion passage)  : 2459170.59970
    P (Orbital period in years)     : 11.31

    Epoch                           : 2025 Oct 18
    Reference                       : MPEC 2021-BE3

    Classification(s):              : Ecliptic; Jupiter family
    Tisserand (Jupiter)             : 2.758

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-10-18 00:00 UT   11 49 50.5   -06 32 44     7.901    7.012   25.2    3.5   278   27.4 
2025-10-19 00:00 UT   11 50 21.9   -06 37 08     7.895    7.013   26.0    3.6   279   27.4 
2025-10-19 12:35 UT   11 50 38.2   -06 39 26     7.891    7.013   26.4    3.6   279   27.4 
2025-10-20 00:00 UT   11 50 53.0   -06 41 32     7.888    7.014   26.8    3.7   279   27.4 
2025-10-21 00:00 UT   11 51 24.0   -06 45 55     7.881    7.014   27.6    3.8   280   27.4 
2025-10-22 00:00 UT   11 51 54.8   -06 50 18     7.874    7.015   28.4    3.9   280   27.4 
2025-10-23 00:00 UT   11 52 25.4   -06 54 41     7.867    7.015   29.3    4.0   281   27.4 
2025-10-24 00:00 UT   11 52 55.9   -06 59 04     7.859    7.016   30.1    4.1   281   27.4 
2025-10-25 00:00 UT   11 53 26.1   -07 03 26     7.851    7.017   30.9    4.2   282   27.4 
2025-10-26 00:00 UT   11 53 56.1   -07 07 47     7.843    7.017   31.7    4.3   282   27.4 
2025-10-27 00:00 UT   11 54 26.0   -07 12 08     7.835    7.018   32.6    4.4   282   27.4 
2025-10-28 00:00 UT   11 54 55.6   -07 16 29     7.827    7.019   33.4    4.5   283   27.4 
2025-10-29 00:00 UT   11 55 25.1   -07 20 49     7.818    7.019   34.3    4.6   283   27.4 

    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.